jQuery1.6 usage method 2_jquery

makeArray: function(array, results) {//Convert an array-like object into a real JavaScript array. results is an optional parameter
var ret = results || [];//results is used as an array to store arry. If it is not defined, it is set to an empty array
　if (array != null) {{//window, The .length of String, Function, and Array types is not undefined; (document.getElementById is undefined in IE, and jQuery.type (document.getElementById) is object, so methods like this are special under IE, and you can use the type method in jquery)
　　　var type = jQuery.type( array );
if ( array.length == null || type === "string" || type === "function" || type === "regexp " || jQuery.isWindow( array ) )
push.call( ret, array );// The object passed in is not an array, so push it and add it to the ret array
} else {
jQuery.merge( ret, array );//The incoming object is an array or similar array, directly merged into the ret array
}
}
return ret;
},
inArray: function( elem, array ) {//Search for the specified value in the array and return its index (returns -1 if not found).
if ( indexOf ) {//ECMA-262 standard browsers support it, and the IE series does not support Array.prototype.indexOf until IE9,
return indexOf.call( array, elem );
}
for ( var i = 0, length = array.length; i if ( array[ i ] === elem ) {
return i;
}
}
return -1;
},
merge: function( first, second) {//Merge arrays
var i = first.length ,
j = 0;
if ( typeof second.length === "number" ) {//Simply detect whether the object has a length attribute, and if so, add it to the end of the operation array in a loop
for ( var l = second.length; j first[ i ] = second[ j ];
}
} else {
while ( second[j] !== undefined ) {
first[ i ] = second[ j ];
}
}
first.length = i;
return first;
},
grep: function(elems, callback, inv) {//Find array elements that satisfy the filtering function. The original array is unaffected.
var ret = [], retVal;
inv = !!inv;//Convert to Boolean value type, if inv is not explicitly specified or specified as false, inv=false;
for ( var i = 0, length = elems.length; i retVal = !!callback( elems[ i ], i );//Convert to Boolean value type
if ( inv !== retVal ) {//If the result returned by callback is opposite to inv, it is retained
ret.push( elems[ i ] );
}
}
return ret;
},