You can not select more than 25 topics
			Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
		
		
		
		
		
			
		
			
				
					
					
						
							53 lines
						
					
					
						
							1.7 KiB
						
					
					
				
			
		
		
	
	
							53 lines
						
					
					
						
							1.7 KiB
						
					
					
				var baseIndexOf = require('./_baseIndexOf'), | 
						|
    isArrayLike = require('./isArrayLike'), | 
						|
    isString = require('./isString'), | 
						|
    toInteger = require('./toInteger'), | 
						|
    values = require('./values'); | 
						|
 | 
						|
/* Built-in method references for those with the same name as other `lodash` methods. */ | 
						|
var nativeMax = Math.max; | 
						|
 | 
						|
/** | 
						|
 * Checks if `value` is in `collection`. If `collection` is a string, it's | 
						|
 * checked for a substring of `value`, otherwise | 
						|
 * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero) | 
						|
 * is used for equality comparisons. If `fromIndex` is negative, it's used as | 
						|
 * the offset from the end of `collection`. | 
						|
 * | 
						|
 * @static | 
						|
 * @memberOf _ | 
						|
 * @since 0.1.0 | 
						|
 * @category Collection | 
						|
 * @param {Array|Object|string} collection The collection to inspect. | 
						|
 * @param {*} value The value to search for. | 
						|
 * @param {number} [fromIndex=0] The index to search from. | 
						|
 * @param- {Object} [guard] Enables use as an iteratee for methods like `_.reduce`. | 
						|
 * @returns {boolean} Returns `true` if `value` is found, else `false`. | 
						|
 * @example | 
						|
 * | 
						|
 * _.includes([1, 2, 3], 1); | 
						|
 * // => true | 
						|
 * | 
						|
 * _.includes([1, 2, 3], 1, 2); | 
						|
 * // => false | 
						|
 * | 
						|
 * _.includes({ 'a': 1, 'b': 2 }, 1); | 
						|
 * // => true | 
						|
 * | 
						|
 * _.includes('abcd', 'bc'); | 
						|
 * // => true | 
						|
 */ | 
						|
function includes(collection, value, fromIndex, guard) { | 
						|
  collection = isArrayLike(collection) ? collection : values(collection); | 
						|
  fromIndex = (fromIndex && !guard) ? toInteger(fromIndex) : 0; | 
						|
 | 
						|
  var length = collection.length; | 
						|
  if (fromIndex < 0) { | 
						|
    fromIndex = nativeMax(length + fromIndex, 0); | 
						|
  } | 
						|
  return isString(collection) | 
						|
    ? (fromIndex <= length && collection.indexOf(value, fromIndex) > -1) | 
						|
    : (!!length && baseIndexOf(collection, value, fromIndex) > -1); | 
						|
} | 
						|
 | 
						|
module.exports = includes;
 | 
						|
 |