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Similar blocks of code found in 3 locations. Consider refactoring.
Open

defineType("DeclareTypeAlias", {
  visitor: ["id", "typeParameters", "right"],
  aliases: ["Flow", "FlowDeclaration", "Statement", "Declaration"],
  fields: {
    id: validateType("Identifier"),
Severity: Major
Found in packages/babel-types/src/definitions/flow.js and 2 other locations - About 1 hr to fix
packages/babel-types/src/definitions/flow.js on lines 118..126
packages/babel-types/src/definitions/flow.js on lines 399..407

Duplicated Code

Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

Tuning

This issue has a mass of 61.

We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

Refactorings

Further Reading

Similar blocks of code found in 3 locations. Consider refactoring.
Open

defineType("DeclareOpaqueType", {
  visitor: ["id", "typeParameters", "supertype"],
  aliases: ["Flow", "FlowDeclaration", "Statement", "Declaration"],
  fields: {
    id: validateType("Identifier"),
Severity: Major
Found in packages/babel-types/src/definitions/flow.js and 2 other locations - About 1 hr to fix
packages/babel-types/src/definitions/flow.js on lines 108..116
packages/babel-types/src/definitions/flow.js on lines 399..407

Duplicated Code

Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

Tuning

This issue has a mass of 61.

We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

Refactorings

Further Reading

Similar blocks of code found in 5 locations. Consider refactoring.
Open

export function MetaProperty(node: Object) {
  this.print(node.meta, node);
  this.token(".");
  this.print(node.property, node);
}
Severity: Major
Found in packages/babel-generator/src/generators/expressions.js and 4 other locations - About 1 hr to fix
packages/babel-generator/src/generators/expressions.js on lines 224..228
packages/babel-generator/src/generators/flow.js on lines 597..601
packages/babel-generator/src/generators/jsx.js on lines 13..17
packages/babel-generator/src/generators/jsx.js on lines 19..23

Duplicated Code

Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

Tuning

This issue has a mass of 61.

We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

Refactorings

Further Reading

Similar blocks of code found in 5 locations. Consider refactoring.
Open

export function JSXNamespacedName(node: Object) {
  this.print(node.namespace, node);
  this.token(":");
  this.print(node.name, node);
}
Severity: Major
Found in packages/babel-generator/src/generators/jsx.js and 4 other locations - About 1 hr to fix
packages/babel-generator/src/generators/expressions.js on lines 224..228
packages/babel-generator/src/generators/expressions.js on lines 257..261
packages/babel-generator/src/generators/flow.js on lines 597..601
packages/babel-generator/src/generators/jsx.js on lines 19..23

Duplicated Code

Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

Tuning

This issue has a mass of 61.

We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

Refactorings

Further Reading

Similar blocks of code found in 3 locations. Consider refactoring.
Open

          this.match(tt.colon) ||
          this.match(tt.comma) ||
          this.match(tt.question) ||
          this.match(tt.eq)
Severity: Major
Found in packages/babel-parser/src/plugins/typescript/index.js and 2 other locations - About 1 hr to fix
packages/babel-parser/src/plugins/flow.js on lines 1101..1104
packages/babel-parser/src/plugins/flow.js on lines 1757..1760

Duplicated Code

Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

Tuning

This issue has a mass of 61.

We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

Refactorings

Further Reading

Similar blocks of code found in 5 locations. Consider refactoring.
Open

export function JSXMemberExpression(node: Object) {
  this.print(node.object, node);
  this.token(".");
  this.print(node.property, node);
}
Severity: Major
Found in packages/babel-generator/src/generators/jsx.js and 4 other locations - About 1 hr to fix
packages/babel-generator/src/generators/expressions.js on lines 224..228
packages/babel-generator/src/generators/expressions.js on lines 257..261
packages/babel-generator/src/generators/flow.js on lines 597..601
packages/babel-generator/src/generators/jsx.js on lines 13..17

Duplicated Code

Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

Tuning

This issue has a mass of 61.

We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

Refactorings

Further Reading

Similar blocks of code found in 2 locations. Consider refactoring.
Open

  const {
    importSource: IMPORT_SOURCE_DEFAULT = DEFAULT.importSource,
    runtime: RUNTIME_DEFAULT = DEFAULT.runtime,
    pragma: PRAGMA_DEFAULT = DEFAULT.pragma,
    pragmaFrag: PRAGMA_FRAG_DEFAULT = DEFAULT.pragmaFrag,
Severity: Major
Found in packages/babel-helper-builder-react-jsx-experimental/src/index.js and 1 other location - About 1 hr to fix
packages/babel-template/src/options.js on lines 57..62

Duplicated Code

Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

Tuning

This issue has a mass of 60.

We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

Refactorings

Further Reading

Similar blocks of code found in 2 locations. Consider refactoring.
Open

  try {
    options = json5.parse(content);
  } catch (err) {
    err.message = `${filepath}: Error while parsing config - ${err.message}`;
    throw err;
Severity: Major
Found in packages/babel-core/src/config/files/configuration.js and 1 other location - About 1 hr to fix
packages/babel-core/src/config/files/package.js on lines 41..46

Duplicated Code

Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

Tuning

This issue has a mass of 60.

We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

Refactorings

Further Reading

Similar blocks of code found in 4 locations. Consider refactoring.
Open

defineType("JSXNamespacedName", {
  visitor: ["namespace", "name"],
  aliases: ["JSX"],
  fields: {
    namespace: {
Severity: Major
Found in packages/babel-types/src/definitions/jsx.js and 3 other locations - About 1 hr to fix
packages/babel-types/src/definitions/core.js on lines 547..558
packages/babel-types/src/definitions/core.js on lines 1139..1150
packages/babel-types/src/definitions/es2015.js on lines 357..368

Duplicated Code

Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

Tuning

This issue has a mass of 60.

We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

Refactorings

Further Reading

Similar blocks of code found in 4 locations. Consider refactoring.
Open

defineType("ExportSpecifier", {
  visitor: ["local", "exported"],
  aliases: ["ModuleSpecifier"],
  fields: {
    local: {
Severity: Major
Found in packages/babel-types/src/definitions/es2015.js and 3 other locations - About 1 hr to fix
packages/babel-types/src/definitions/core.js on lines 547..558
packages/babel-types/src/definitions/core.js on lines 1139..1150
packages/babel-types/src/definitions/jsx.js on lines 122..133

Duplicated Code

Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

Tuning

This issue has a mass of 60.

We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

Refactorings

Further Reading

Identical blocks of code found in 2 locations. Consider refactoring.
Open

  if (Array.isArray(value)) {
    value.forEach((item, i) => {
      if (!checkValidTest(item)) {
        throw new Error(
          `${msg(access(loc, i))} must be a string/Function/RegExp.`,
Severity: Major
Found in packages/babel-core/src/config/validation/option-assertions.js and 1 other location - About 1 hr to fix
packages/babel-core/src/config/validation/option-assertions.js on lines 246..258

Duplicated Code

Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

Tuning

This issue has a mass of 60.

We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

Refactorings

Further Reading

Similar blocks of code found in 2 locations. Consider refactoring.
Open

const validateBabelrcFile = makeWeakCacheSync(
  (file: ConfigFile): ValidatedFile => ({
    filepath: file.filepath,
    dirname: file.dirname,
    options: validate("babelrcfile", file.options),
Severity: Major
Found in packages/babel-core/src/config/config-chain.js and 1 other location - About 1 hr to fix
packages/babel-core/src/config/config-chain.js on lines 280..286

Duplicated Code

Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

Tuning

This issue has a mass of 60.

We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

Refactorings

Further Reading

Identical blocks of code found in 2 locations. Consider refactoring.
Open

  if (Array.isArray(value)) {
    value.forEach((item, i) => {
      if (!checkValidTest(item)) {
        throw new Error(
          `${msg(access(loc, i))} must be a string/Function/RegExp.`,
Severity: Major
Found in packages/babel-core/src/config/validation/option-assertions.js and 1 other location - About 1 hr to fix
packages/babel-core/src/config/validation/option-assertions.js on lines 294..307

Duplicated Code

Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

Tuning

This issue has a mass of 60.

We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

Refactorings

Further Reading

Similar blocks of code found in 4 locations. Consider refactoring.
Open

defineType("WithStatement", {
  visitor: ["object", "body"],
  aliases: ["Statement"],
  fields: {
    object: {
Severity: Major
Found in packages/babel-types/src/definitions/core.js and 3 other locations - About 1 hr to fix
packages/babel-types/src/definitions/core.js on lines 547..558
packages/babel-types/src/definitions/es2015.js on lines 357..368
packages/babel-types/src/definitions/jsx.js on lines 122..133

Duplicated Code

Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

Tuning

This issue has a mass of 60.

We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

Refactorings

Further Reading

Similar blocks of code found in 2 locations. Consider refactoring.
Open

  const {
    placeholderWhitelist = a.placeholderWhitelist,
    placeholderPattern = a.placeholderPattern,
    preserveComments = a.preserveComments,
    syntacticPlaceholders = a.syntacticPlaceholders,
Severity: Major
Found in packages/babel-template/src/options.js and 1 other location - About 1 hr to fix
packages/babel-helper-builder-react-jsx-experimental/src/index.js on lines 26..31

Duplicated Code

Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

Tuning

This issue has a mass of 60.

We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

Refactorings

Further Reading

Similar blocks of code found in 2 locations. Consider refactoring.
Open

const validateConfigFile = makeWeakCacheSync(
  (file: ConfigFile): ValidatedFile => ({
    filepath: file.filepath,
    dirname: file.dirname,
    options: validate("configfile", file.options),
Severity: Major
Found in packages/babel-core/src/config/config-chain.js and 1 other location - About 1 hr to fix
packages/babel-core/src/config/config-chain.js on lines 288..294

Duplicated Code

Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

Tuning

This issue has a mass of 60.

We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

Refactorings

Further Reading

Similar blocks of code found in 2 locations. Consider refactoring.
Open

    try {
      options = JSON.parse(content);
    } catch (err) {
      err.message = `${filepath}: Error while parsing JSON - ${err.message}`;
      throw err;
Severity: Major
Found in packages/babel-core/src/config/files/package.js and 1 other location - About 1 hr to fix
packages/babel-core/src/config/files/configuration.js on lines 257..262

Duplicated Code

Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

Tuning

This issue has a mass of 60.

We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

Refactorings

Further Reading

Similar blocks of code found in 4 locations. Consider refactoring.
Open

defineType("LabeledStatement", {
  visitor: ["label", "body"],
  aliases: ["Statement"],
  fields: {
    label: {
Severity: Major
Found in packages/babel-types/src/definitions/core.js and 3 other locations - About 1 hr to fix
packages/babel-types/src/definitions/core.js on lines 1139..1150
packages/babel-types/src/definitions/es2015.js on lines 357..368
packages/babel-types/src/definitions/jsx.js on lines 122..133

Duplicated Code

Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

Tuning

This issue has a mass of 60.

We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

Refactorings

Further Reading

Identical blocks of code found in 2 locations. Consider refactoring.
Open

    return () => {
      return id
        .split(".")
        .map(name => t.identifier(name))
        .reduce((object, property) => t.memberExpression(object, property));
Severity: Major
Found in packages/babel-helper-builder-react-jsx-experimental/src/index.js and 1 other location - About 1 hr to fix
packages/babel-plugin-transform-react-jsx/src/transform-classic.js on lines 24..29

Duplicated Code

Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

Tuning

This issue has a mass of 59.

We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

Refactorings

Further Reading

Similar blocks of code found in 2 locations. Consider refactoring.
Open

      StringLiteral({ node }) {
        // unicode escape
        if (node.extra && /\\[u]/gi.test(node.extra.raw)) {
          node.extra = undefined;
        }
Severity: Major
Found in packages/babel-plugin-transform-literals/src/index.js and 1 other location - About 1 hr to fix
packages/babel-plugin-transform-literals/src/index.js on lines 10..15

Duplicated Code

Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

Tuning

This issue has a mass of 59.

We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

Refactorings

Further Reading

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