Operation addition, deletion and modification of json array in jquery

Addition, deletion and modification of json array
operations

in

jquery is the length

var arrayObj = new Array([element0[, element1[, ...[, elementN]]]]); Create an array and assign a value It

    should be noted that although the second method creates an array with a specified length, the actual In all the above cases, the array is variable-length, that is to say, even if the specified length is 5, elements can still be stored outside the specified length. Note: the length will change accordingly.

2. Access to the elements of the array

var testGetArrValue=arrayObj[1]; //Get the element value of the array

arrayObj[1]= "This is the new value"; //Give a new value to the array element

3. Add

arrayObj to the array element .push([item1 [item2 [. . . [itemN ]]]]);// Add one or more new elements to the end of the array and return the new length of the array

arrayObj.unshift([item1 [item2 [. . . [itemN ]]]]);// Add one or more new elements to the beginning of the array, the elements in the array are automatically moved backward, and the new length of the array is returned

arrayObj.splice(insertPos,0,[item1[, item2[, . . . [,itemN]]]]);//Insert one or more new elements into the specified position of the array, the element at the insertion position is automatically moved backward, and returns "".

4. Deletion of array elements

arrayObj.pop(); //Remove the last element and return the value of the element

arrayObj.shift(); //Remove the first element and return the value of the element, the elements in the array are automatically moved forward

arrayObj

/ _

_ /Return part of the array in the form of an array. Note that the element corresponding to end is not included. If end is omitted, all elements after start will be copied

arrayObj.concat([item1[, item2[, . . . [,itemN]]]]]) ; //Concatenate multiple arrays (or strings, or a mixture of arrays and strings) into an array, return the new concatenated array

6, a copy of the array

arrayObj.slice(0); //Return The copy array of the array, note that it is a new array, not pointing to

arrayObj.concat(); //Return the copy array of the array, note that it is a new array, not pointing to

7, the sorting of array elements

arrayObj.reverse(); / /Reverse the elements (the first row to the last, the last row to the first), return the array address

arrayObj.sort(); // Sort the array elements, return the array address

8, the stringification of the array elements

arrayObj.join(separator); //Return a string that joins the values ​​of each element of the array, separated by a separator.

toLocaleString , toString , valueOf: It can be regarded as a special usage of join, which is not commonly used.

From :
http://www.cnblogs.com/divenswu/p/3768127.html