$.each in Jquery gets the usage of various return types of data

  • 2020-06-03 05:52:21
  • OfStack


var arr = [ "one", "two", "three", "four"]; 
$.each(arr, function(){ 
alert(this); 
}); 

The above each output is: one,two,three,four


var arr = [ "aaa", "bbb", "ccc" ]; 
$.each(arr, function(i,a){ 
alert(i); // i  Is the ordinal number of the loop 
alert(a); // a  Is the value 
}); 
var arr1 = [[1, 4, 3], [4, 6, 6], [7, 20, 9]] 
$.each(arr1, function(i, item){ 
alert(item[0]); 
}); 

In fact, arr1 is a 2-dimensional array, and item is equivalent to taking every 1-dimensional array,
item[0] takes the first value in every 1-dimensional array
So the each output above is: 1, 4, 7


var obj = { one:1, two:2, three:3, four:4}; 
$.each(obj, function(key, val) { 
alert(obj[key]);
alert(key); // key 
alert(val); // value 
}); 

The output result is: 1, 2, 3, 4

This is the end of this article, I hope you enjoy it.


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