![]() Joins all elements of an array into a string. Returns the first (least) index at which a given element can be found in the calling array. ()ĭetermines whether the calling array contains a value, returning true or false as appropriate. Groups the elements of an array into a Map according to values returned by a test function. Groups the elements of an array into an object according to the strings returned by a test function. () (en-US)Ĭalls a function for each element in the calling array. ![]() Returns a new array formed by applying a given callback function to each element of the calling array, and then flattening the result by one level. Returns a new array with all sub-array elements concatenated into it recursively up to the specified depth. Returns the index of the last element in the array that satisfies the provided testing function, or -1 if no appropriate element was found. Returns the value of the last element in the array that satisfies the provided testing function, or undefined if no appropriate element is found. Returns the index of the first element in the array that satisfies the provided testing function, or -1 if no appropriate element was found. Returns the value of the first element in the array that satisfies the provided testing function, or undefined if no appropriate element is found. Returns a new array containing all elements of the calling array for which the provided filtering function returns true. ()įills all the elements of an array from a start index to an end index with a static value. Returns true if every element in the calling array satisfies the testing function. Returns a new array iterator (en-US) object that contains the key/value pairs for each index in an array. ()Ĭopies a sequence of array elements within an array. ![]() Returns a new array that is the calling array joined with other array(s) and/or value(s). Accepts negative integers, which count back from the last item. Returns the array item at the given index. Object.prototype._lookupSetter_() (en-US) 已棄用.Object.prototype._lookupGetter_() (en-US) 已棄用.Object.prototype._defineSetter_() (en-US) 已棄用. ![]() ![]()
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