How to determine whether jquery is an array

In jquery, you can use the "$.isArray()" function to determine whether the specified parameter is an array. The syntax is "$.isArray(object)". The parameter object represents any type that needs to be judged. Value; returns true if the specified parameter is an array, false otherwise.

The operating environment of this tutorial: windows7 system, jquery3.5 version, Dell G3 computer.

Recommended tutorial: jQuery tutorial

isArray() function detailed explanation

$.isArray() function is used to determine the specified Whether the parameter is an array.

This function belongs to the global jQuery object.

Syntax:

$.isArray( object )

Parameters:

object: Any type Any value that needs to be judged.

Return value:

Boolean type, if the specified parameter is an array, it returns true, otherwise it returns false.

Example:

//在当前页面内追加换行标签和指定的HTML内容
function w( html ){
	document.body.innerHTML += "<br/>" + html;
}



w( $.isArray( [ 10, 25, 3 ] ) ); // true
w( $.isArray( new Array() ) ); // true


w( $.isArray( null ) ); // false
w( $.isArray( true ) ); // false
w( $.isArray( { } ) ); // false

var obj = { };
obj[0] = 10;
obj[1] = 25;
obj[2] = 3;
obj.length = 3;
// obj是一个类数组对象，但它仍然不是一个真正的数组
w( $.isArray( obj ) ); // false

Output:

true
true
false
false
false
false

For more programming related knowledge, please visit:Programming Teaching! !

The above is the detailed content of How to determine whether jquery is an array. For more information, please follow other related articles on the PHP Chinese website!