src/helpers/check.js
module.exports = {
/**
* Check if the value itself is defined
* @param {value} value The reference value
* @return {boolean}
*/
isSelfDefined: (value) => {
return typeof value !== 'undefined'
},
/**
* Check if the value itself is defined and not null
* @param {value} value The reference value
* @return {boolean}
*/
isSelfDefinedAndNotNull: (value) => {
return (typeof value !== 'undefined' && value !== null)
},
/**
* Check if the value itself is defined and if the value is not null, 0, false...
* @param {value} value The reference value
* @return {boolean}
*/
isSelfDefinedAndValid: (value) => {
return (typeof value !== 'undefined' && !!value)
},
/**
* Check if a key is defined in an object
* @param {object} obj The reference object
* @param {string} key The index to check
* @return {boolean}
*/
isDefined: (obj, key) => {
return (typeof obj !== 'undefined' && typeof obj[key] !== 'undefined')
},
/**
* Check if a key is defined in an object and if the value is not null
* @param {object} obj The reference object
* @param {string} key The index to check
* @return {boolean}
*/
isDefinedAndNotNull: (obj, key) => {
return (typeof obj !== 'undefined' && typeof obj[key] !== 'undefined' && obj[key] !== null)
},
/**
* Check if a key is defined in an object and if the value is not null, 0, false...
* @param {object} obj The reference object
* @param {string} key The index to check
* @return {boolean}
*/
isDefinedAndValid: (obj, key) => {
return (typeof obj !== 'undefined' && typeof obj[key] !== 'undefined' && !!obj[key])
}
}