Current File : //lib/node_modules/npm/node_modules/lodash._createset/index.js
/**
* lodash (Custom Build) <https://lodash.com/>
* Build: `lodash modularize exports="npm" -o ./`
* Copyright jQuery Foundation and other contributors <https://jquery.org/>
* Released under MIT license <https://lodash.com/license>
* Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
* Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
*/
/** Used as references for various `Number` constants. */
var INFINITY = 1 / 0;
/** `Object#toString` result references. */
var funcTag = '[object Function]',
genTag = '[object GeneratorFunction]';
/**
* Used to match `RegExp`
* [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
*/
var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
/** Used to detect host constructors (Safari). */
var reIsHostCtor = /^\[object .+?Constructor\]$/;
/** Used to determine if values are of the language type `Object`. */
var objectTypes = {
'function': true,
'object': true
};
/** Detect free variable `exports`. */
var freeExports = (objectTypes[typeof exports] && exports && !exports.nodeType)
? exports
: undefined;
/** Detect free variable `module`. */
var freeModule = (objectTypes[typeof module] && module && !module.nodeType)
? module
: undefined;
/** Detect free variable `global` from Node.js. */
var freeGlobal = checkGlobal(freeExports && freeModule && typeof global == 'object' && global);
/** Detect free variable `self`. */
var freeSelf = checkGlobal(objectTypes[typeof self] && self);
/** Detect free variable `window`. */
var freeWindow = checkGlobal(objectTypes[typeof window] && window);
/** Detect `this` as the global object. */
var thisGlobal = checkGlobal(objectTypes[typeof this] && this);
/**
* Used as a reference to the global object.
*
* The `this` value is used if it's the global object to avoid Greasemonkey's
* restricted `window` object, otherwise the `window` object is used.
*/
var root = freeGlobal ||
((freeWindow !== (thisGlobal && thisGlobal.window)) && freeWindow) ||
freeSelf || thisGlobal || Function('return this')();
/**
* Checks if `value` is a global object.
*
* @private
* @param {*} value The value to check.
* @returns {null|Object} Returns `value` if it's a global object, else `null`.
*/
function checkGlobal(value) {
return (value && value.Object === Object) ? value : null;
}
/**
* Checks if `value` is a host object in IE < 9.
*
* @private
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a host object, else `false`.
*/
function isHostObject(value) {
// Many host objects are `Object` objects that can coerce to strings
// despite having improperly defined `toString` methods.
var result = false;
if (value != null && typeof value.toString != 'function') {
try {
result = !!(value + '');
} catch (e) {}
}
return result;
}
/**
* Converts `set` to an array of its values.
*
* @private
* @param {Object} set The set to convert.
* @returns {Array} Returns the values.
*/
function setToArray(set) {
var index = -1,
result = Array(set.size);
set.forEach(function(value) {
result[++index] = value;
});
return result;
}
/** Used for built-in method references. */
var objectProto = Object.prototype;
/** Used to resolve the decompiled source of functions. */
var funcToString = Function.prototype.toString;
/** Used to check objects for own properties. */
var hasOwnProperty = objectProto.hasOwnProperty;
/**
* Used to resolve the
* [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
* of values.
*/
var objectToString = objectProto.toString;
/** Used to detect if a method is native. */
var reIsNative = RegExp('^' +
funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
.replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
);
/* Built-in method references that are verified to be native. */
var Set = getNative(root, 'Set');
/**
* Creates a set of `values`.
*
* @private
* @param {Array} values The values to add to the set.
* @returns {Object} Returns the new set.
*/
var createSet = !(Set && (1 / setToArray(new Set([,-0]))[1]) == INFINITY) ? noop : function(values) {
return new Set(values);
};
/**
* Gets the native function at `key` of `object`.
*
* @private
* @param {Object} object The object to query.
* @param {string} key The key of the method to get.
* @returns {*} Returns the function if it's native, else `undefined`.
*/
function getNative(object, key) {
var value = object[key];
return isNative(value) ? value : undefined;
}
/**
* Converts `func` to its source code.
*
* @private
* @param {Function} func The function to process.
* @returns {string} Returns the source code.
*/
function toSource(func) {
if (func != null) {
try {
return funcToString.call(func);
} catch (e) {}
try {
return (func + '');
} catch (e) {}
}
return '';
}
/**
* Checks if `value` is classified as a `Function` object.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is correctly classified,
* else `false`.
* @example
*
* _.isFunction(_);
* // => true
*
* _.isFunction(/abc/);
* // => false
*/
function isFunction(value) {
// The use of `Object#toString` avoids issues with the `typeof` operator
// in Safari 8 which returns 'object' for typed array and weak map constructors,
// and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
var tag = isObject(value) ? objectToString.call(value) : '';
return tag == funcTag || tag == genTag;
}
/**
* Checks if `value` is the
* [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
* of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
*
* @static
* @memberOf _
* @since 0.1.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is an object, else `false`.
* @example
*
* _.isObject({});
* // => true
*
* _.isObject([1, 2, 3]);
* // => true
*
* _.isObject(_.noop);
* // => true
*
* _.isObject(null);
* // => false
*/
function isObject(value) {
var type = typeof value;
return !!value && (type == 'object' || type == 'function');
}
/**
* Checks if `value` is a native function.
*
* @static
* @memberOf _
* @since 3.0.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a native function,
* else `false`.
* @example
*
* _.isNative(Array.prototype.push);
* // => true
*
* _.isNative(_);
* // => false
*/
function isNative(value) {
if (!isObject(value)) {
return false;
}
var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
return pattern.test(toSource(value));
}
/**
* A no-operation function that returns `undefined` regardless of the
* arguments it receives.
*
* @static
* @memberOf _
* @since 2.3.0
* @category Util
* @example
*
* var object = { 'user': 'fred' };
*
* _.noop(object) === undefined;
* // => true
*/
function noop() {
// No operation performed.
}
module.exports = createSet;
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