1 bake ()
a) connecting two or more arrays, and returns the result
b) for performing the method returns a new array, the array has no effect on the original
c) a plurality of parameters may be, a plurality of which are not filled can be filled
2、every（）
Whether each element a) are in line with the conditions of the detection array
b) Return Value: If there is an array of non-compliance with returns false, all in compliance with returns true
c) Parameters Parameter both a first parameter is a callback function (a function parameter)
The callback must return a value, the result returned is a boolean, otherwise not
Callback function parameter is the current element and the current element corresponding index
The second function is an object, optional replacement for the callback function in this
3、filter（）
a) detecting elements in the array, it returns the right elements constituting the new array
b) Return Value: returns a new array
c) The first parameter is a parameter callback
The first parameter is the callback of the current element, the callback must return a result
The second parameter is the callback element corresponding to the current index
The second function is to replace this callback
4、find（）
a) each element in the array are called once, returns the first matching element
b) the value returned is the first matching element
c) Parameters
The first parameter is the callback must return a value
The second parameter in this alternative directed callback
5、findindex
Each element in the array once, returns the index of the first qualifying of the array elements
Usage and find () as
6, foeEach ()
Each element of the array call, and elements are passed to the callback with the for loop as
Is a process of elements, no return value
The return value is not always return undefined
The first parameter is the callback parameter
The second parameter is used in this alternative directed callback
7、map（）
Returns a new array, the new array element is performed after the return value of the callback
Return Value: returns a new array
Parameters The first parameter is the callback callback must return a value
The second parameter in this alternative callback
8、includes（）
Analyzing an array contains a specified value has no returns true returns false
Return value boolean
Values of the parameters specified
9、indexof（）
Searching for an element position in the array, the index has returned to his, not to return -1
Returns the index values of the digital and -1
Values of the parameters specified
Deduplication Array
10、join（）
All elements in the array will be converted into a string
Returns Returns new string
Parameter specifies the dividing line does not write default is a comma
11、push（）
Modify the original array to add new elements to the end of the array of items
The return value is the length of the new array
Parameter elements
12、pop（）
The last element of the original array is modified to delete the array
The value returned is to remove that element
Parameters no parameters
13、Reduce（）
Current element operation callback function, a return value can not be separated before the element. From the beginning of the second term is generally performed
return value
Parameters The first parameter is a callback function must return a value are undefined otherwise
The first parameter a) is the callback total
total is the preceding element corresponding to the return value of the callback function
b) The second parameter is the current element callback
The third parameter c) the callback function is the index value of the current corresponding to the elements
The second argument is an initial value, if written, reduce the first term started from this initial value as the first term pullback in the total, if you do not write, execute from the beginning of the second term, the first element is the first two in the total
14 , Reverse () inverted array
Reverse the order of the array
The return value is an array of the reversed, changed the original array
Parameters no parameters
15 unshift()
Add one or more elements to the beginning of an array
The return value of new added length of the array upon return
参数 要添加的元素
16 shift()
删除数组中的第一个元素
返回值 返回被删除的那个元素
参数 没有参数
17，slice()
从原数组中截取并返回一部分元素
返回值 一个新数组 截取到的元素构成的新数组
参数 开始的位置 和结束的位置 （不包含最后一个元素）前闭后开
18.some()
检索数组中是否有符合条件的元素，只要有一个符合 返回true，全不符合返回false
返回值就是boolean
参数 是一个回调函数 回调函数里必须有返回值
19，sort()
对数组的元素进行排序 按0-9-a-z顺序排列
返回值 排列后的新数组
参数 callback
Callback 规定sort的排列方式
20.splice()
从数组中指定的某一项开始删除元素或添加新元素 会改变原有的数组
返回值 是一个数组 如果删除了元素 返回的是这写删除元素构成的新数组
如果没有删除 返回的是一个空数组
参数 第一参数 必须填 起始位置
第二个参数 删除元素的个数 可以是0 代表没有删除 不填删除后面所有的
第三类参数 从第三个参数开始 后面都是添加的新元素
21.toString()
将数组转化为字符串 并返回这个字符串
返回值 转化后的字符串
参数 没有参数