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author | Dimitri Staessens <[email protected]> | 2019-10-06 21:37:45 +0200 |
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committer | Dimitri Staessens <[email protected]> | 2019-10-06 21:37:45 +0200 |
commit | 3c51c3be85bb0d1bdb87ea0d6632f1c256912f27 (patch) | |
tree | c7ccc8279b12c4f7bdbbb4270d617e48f51722e4 /node_modules/object-copy/index.js | |
parent | 412c104bebc507bea9c94fd53b5bdc4b64cbfe31 (diff) | |
download | website-3c51c3be85bb0d1bdb87ea0d6632f1c256912f27.tar.gz website-3c51c3be85bb0d1bdb87ea0d6632f1c256912f27.zip |
build: Add some required modules for node
Diffstat (limited to 'node_modules/object-copy/index.js')
-rw-r--r-- | node_modules/object-copy/index.js | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/node_modules/object-copy/index.js b/node_modules/object-copy/index.js new file mode 100644 index 0000000..f9faa22 --- /dev/null +++ b/node_modules/object-copy/index.js @@ -0,0 +1,174 @@ +'use strict'; + +var typeOf = require('kind-of'); +var copyDescriptor = require('copy-descriptor'); +var define = require('define-property'); + +/** + * Copy static properties, prototype properties, and descriptors from one object to another. + * + * ```js + * function App() {} + * var proto = App.prototype; + * App.prototype.set = function() {}; + * App.prototype.get = function() {}; + * + * var obj = {}; + * copy(obj, proto); + * ``` + * @param {Object} `receiver` + * @param {Object} `provider` + * @param {String|Array} `omit` One or more properties to omit + * @return {Object} + * @api public + */ + +function copy(receiver, provider, omit) { + if (!isObject(receiver)) { + throw new TypeError('expected receiving object to be an object.'); + } + if (!isObject(provider)) { + throw new TypeError('expected providing object to be an object.'); + } + + var props = nativeKeys(provider); + var keys = Object.keys(provider); + var len = props.length; + omit = arrayify(omit); + + while (len--) { + var key = props[len]; + + if (has(keys, key)) { + define(receiver, key, provider[key]); + } else if (!(key in receiver) && !has(omit, key)) { + copyDescriptor(receiver, provider, key); + } + } +}; + +/** + * Return true if the given value is an object or function + */ + +function isObject(val) { + return typeOf(val) === 'object' || typeof val === 'function'; +} + +/** + * Returns true if an array has any of the given elements, or an + * object has any of the give keys. + * + * ```js + * has(['a', 'b', 'c'], 'c'); + * //=> true + * + * has(['a', 'b', 'c'], ['c', 'z']); + * //=> true + * + * has({a: 'b', c: 'd'}, ['c', 'z']); + * //=> true + * ``` + * @param {Object} `obj` + * @param {String|Array} `val` + * @return {Boolean} + */ + +function has(obj, val) { + val = arrayify(val); + var len = val.length; + + if (isObject(obj)) { + for (var key in obj) { + if (val.indexOf(key) > -1) { + return true; + } + } + + var keys = nativeKeys(obj); + return has(keys, val); + } + + if (Array.isArray(obj)) { + var arr = obj; + while (len--) { + if (arr.indexOf(val[len]) > -1) { + return true; + } + } + return false; + } + + throw new TypeError('expected an array or object.'); +} + +/** + * Cast the given value to an array. + * + * ```js + * arrayify('foo'); + * //=> ['foo'] + * + * arrayify(['foo']); + * //=> ['foo'] + * ``` + * + * @param {String|Array} `val` + * @return {Array} + */ + +function arrayify(val) { + return val ? (Array.isArray(val) ? val : [val]) : []; +} + +/** + * Returns true if a value has a `contructor` + * + * ```js + * hasConstructor({}); + * //=> true + * + * hasConstructor(Object.create(null)); + * //=> false + * ``` + * @param {Object} `value` + * @return {Boolean} + */ + +function hasConstructor(val) { + return isObject(val) && typeof val.constructor !== 'undefined'; +} + +/** + * Get the native `ownPropertyNames` from the constructor of the + * given `object`. An empty array is returned if the object does + * not have a constructor. + * + * ```js + * nativeKeys({a: 'b', b: 'c', c: 'd'}) + * //=> ['a', 'b', 'c'] + * + * nativeKeys(function(){}) + * //=> ['length', 'caller'] + * ``` + * + * @param {Object} `obj` Object that has a `constructor`. + * @return {Array} Array of keys. + */ + +function nativeKeys(val) { + if (!hasConstructor(val)) return []; + return Object.getOwnPropertyNames(val); +} + +/** + * Expose `copy` + */ + +module.exports = copy; + +/** + * Expose `copy.has` for tests + */ + +module.exports.has = has; |