Strings in array are no longer strings after jQuery.each()
I'm pretty confused with the behaviour of arrays of strings when I loop them through the jQuery.each() method. Apparently, the strings become jQuery ob开发者_如何转开发jects inside the callback function. However, I cannot use the this.get() method to obtain the original string; doing so triggers a this.get is not a function error message. I suppose the reason is that it's not a DOM node. I can do $(this).get() but it makes my string become an array (from "foo" to ["f", "o", "o"]).
How can I cast it back to string? I need to get a variable of String type because I pass it to other functions that compare the values among them.
I enclose a self-contained test case (requires Firebug's console):
<!DOCTYPE html>
<html>
<head><title></title>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
<script type="text/javascript"><!--
$(function(){
var foo = [];
var $foo = $(foo);
foo.push("987");
$foo.push("987");
foo.push("654");
$foo.push("654");
$.each(foo, function(i){
console.log("foo[%d]: object=%o; value=%s; string=%o", i, this, this, $(this).get()); // this.get() does not exist
});
$foo.each(function(i){
console.log("$foo[%d]: object=%o; value=%s; string=%o", i, this, this, $(this).get()); // this.get() does not exist
});
});
//--></script>
</head>
<body>
</body>
</html>
edit/clarification: calllback functions takes two arguments, the second one is value of the variable. Use it instead of this
I have tested both variants and everything seems to work as expected (strings are still strings).
>>> $.each(['foo','bar'], function(i, s){ console.info( s, typeof s ) })
foo string
bar string
>>> $(['foo','bar']).each(function(i, s){ console.info( s, typeof s ) })
foo string
bar string
This works in my Firefox 3.5:
$(function(){
var foo = [];
foo.push("abc");
foo.push("def");
$.each(foo, function(i){
console.log(typeof ("" + this));
});
});
The console shows
string string
加载中,请稍侯......
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