jQuery核心之那些有效的方法

// Returns "lots of extra whitespace"
$.trim( "    lots of extra whitespace    " );

$.each([ "foo", "bar", "baz" ], function( idx, val ) {
    console.log( "element " + idx + " is " + val );
});
 
$.each({ foo: "bar", baz: "bim" }, function( k, v ) {
    console.log( k + " : " + v );
}); 

var myArray = [ 1, 2, 3, 5 ];
 
if ( $.inArray( 4, myArray ) !== -1 ) {
    console.log( "found it!" );
}

var firstObject = { foo: "bar", a: "b" };
var secondObject = { foo: "baz" };
 
var newObject = $.extend( firstObject, secondObject );
 
console.log( firstObject.foo ); // "baz"
console.log( newObject.foo ); // "baz"

 

var firstObject = { foo: "bar", a: "b" };
var secondObject = { foo: "baz" };
 
var newObject = $.extend( {}, firstObject, secondObject );
 
console.log( firstObject.foo ); // "bar"
console.log( newObject.foo ); // "baz" 

var myFunction = function() {
    console.log( this );
};
var myObject = {
    foo: "bar"
};
 
myFunction(); // window
 
var myProxyFunction = $.proxy( myFunction, myObject );
 
myProxyFunction(); // myObject 

var myObject = {
    myFn: function() {
        console.log( this );
    }
};
 
$( "#foo" ).click( myObject.myFn ); // HTMLElement #foo
$( "#foo" ).click( $.proxy( myObject, "myFn" ) ); // myObject