What is the function of each() in jquery?

In jquery, each() is a traversal function that can be used to traverse specified objects and arrays. This function accepts two non-omitable parameters. The first parameter specifies the object or array that needs to be traversed. The second parameter specifies the callback function for loop execution; the syntax is "$.each(object,callback)".

The operating environment of this tutorial: windows7 system, jquery1.10.2 version, Dell G3 computer.

In jquery, each() is a traversal function that can be used to traverse specified objects and arrays.

$.each() accepts two parameters that cannot be omitted:

Parameters	Description
object	Object type specifies the object or array to be traversed.
callback	Function type The specified callback function for loop execution.

Example 1: Traverse array elements

<script src="js/jquery-1.10.2.min.js"></script>
<script>
	$(function() {
		$.each([52, 97], function(index, value) {
			console.log(index + &#39;: &#39; + value);
		});
	})
</script>

Example 2: Traverse object properties

<script src="js/jquery-1.10.2.min.js"></script>
<script>
	$(function() {
		var obj = {
				"flammable": "inflammable",
				"duh": "no duh"
			};
		$.each(obj, function(key, value) {
			console.log(key + &#39;： &#39; + value);
		});
	})
</script>

【Recommended learning: jQuery video tutorial, web front-end video】

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