JavaScript push (), join () Function example detailed _javascript tips

Definitions and usage

The push method can add one or more elements to the end of the array and return a new length.

The Join method is used to add all elements of an array to a specified string, and the elements are split by the specified delimiter.

Grammar

Arrayobject.push (Newelement1,newelement2,...., newelementx)
arrayobject.join (separator).

Parameter description newelement1 required. The first element to add to the array. Newelement2 Optional. The second element to add to the array. Newelementx Optional. Multiple elements can be added.

The parameter description separator by default is by pressing "," or you can specify the separator you want to use.

Example:

var arr = [1,2];
Console.log ("arrbegin-->" +arr);
Alert (Arr.push (3,4));
Console.log ("arrnew-->" +arr);
var joinstr = Arr.join ();
Console.log ("JoinStr1--->" +joinstr);
var joinstr = Arr.join ("");
Console.log ("JoinStr2--->" +joinstr);
var joinstr = Arr.join (".");
Console.log ("JoinStr3--->" +joinstr);

Output results

arrbegin-->1,2
alert (4);
arrnew-->1,2,3,4
joinStr1--->1,2,3,4
]joinstr2--->1234 joinStr3
--->1.2.3.4

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