ExtJS learning ----------- Ext. Array, ExtJS extension to the Array in javascript (example), ext. array. foreach

ExtJS learning ----------- Ext. Array, ExtJS extension to the Array in javascript (example), ext. array. foreach

(1) clean

Var arr = [1, 2, null, 3, '']; alert (Ext. array. clean (arr); // clean object :( value = null) | (value = undefined) | (! AllowEmptyString? Value = '': false) | (Ext. isArray (value) & value. length = 0) // The result is 1, 2, 3.

(2) difference

// Differencevar arr1 = [, 3]; var arr2 = [, 6]; alert (Ext. Array. difference (arr1, arr2); // The result is 1, 3.

(3) each

// Eachvar arr = [1, 2, 4]; Ext. array. each (arr, function (item) {if (item = 4) {return false;} alert (item ); // when the function returns false internally, iteration will be stopped}); // result: the pop-up dialog box appears, showing 1 2 3, not 4

(4) erase

// Erasevar arr = [1, 3, 4, 5]; alert (Ext. Array. erase (arr, 2, 2); // The Array starts from 0. Delete two elements from the position where the subscript is 2 (inclusive). // result: 1, 2, 3

(5) every

// Everyvar arr = [1, 2, 5, 6, 9, 10]; var flag = Ext. array. every (arr, function (item) {if (item >=7) {return false ;}else {return true ;}); alert (flag); // result: false

(6) filter

// Filtervar arr = [1, 2, 3, 4, 10, 18, 23]; var newarr = Ext. array. filter (arr, function (item) {if (item> 10) {return false ;}else {return true ;}); alert (newarr); // result: 1, 2, 3, 4, 10

(7) include

// Includevar arr = [1, 2, 3, 4]; Ext. Array. include (arr, 2); alert (arr); // result: 1, 2, 3, 4

(8) unique

// Unqiuevar arr = [, 5, 21,]; alert (Ext. array. unique (arr); // remove the repeated items in the array using the characteristics of the js object. The key of the obj cannot be repeated var obj ={}; for (var I = 0, len = arr. length; I <len; I ++) {obj [arr [I] = true; // removes the repeated entries in the array} // alert (Ext. encode (obj); var uniquearr = []; for (var I in obj) {if (obj. hasOwnProperty (I) {uniquearr. push (I) ;}} alert (uniquearr); // result: 1, 2, 3, 4, 5, 21, 23

Call extjs in javascript

Hi.baidu.com/ext_js
I think you should be very satisfied with this.
Ext. Msg. show ("...");

Extjs learning problems, really depressed recently want to learn extjs, download the ext-230 on the official website, always don't do well

First, the problem may be that the order of the ext package is wrong. We recommend that you write the package order according to the api documentation ,,,
I don't know much about others. I am also a beginner. If you are interested, you can communicate with me. In fact, for beginners, just look at the api and examples. ext4.0 charges fees, so if you don't need it very much, don't use 4.0 or less ,,