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Versions: 153
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Contents
var isFunction = require('./isFunction'),
isObjectLike = require('../internal/isObjectLike');
/** Used to detect host constructors (Safari > 5). */
var reIsHostCtor = /^\[object .+?Constructor\]$/;
/** Used for native method references. */
var objectProto = Object.prototype;
/** Used to resolve the decompiled source of functions. */
var fnToString = Function.prototype.toString;
/** Used to check objects for own properties. */
var hasOwnProperty = objectProto.hasOwnProperty;
/** Used to detect if a method is native. */
var reIsNative = RegExp('^' +
fnToString.call(hasOwnProperty).replace(/[\\^$.*+?()[\]{}|]/g, '\\$&')
.replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
);
/**
* Checks if `value` is a native function.
*
* @static
* @memberOf _
* @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 (value == null) {
return false;
}
if (isFunction(value)) {
return reIsNative.test(fnToString.call(value));
}
return isObjectLike(value) && reIsHostCtor.test(value);
}
module.exports = isNative;
Version data entries
153 entries across 80 versions & 8 rubygems