javascript - AngularJS example in $resource API -
http://docs.angularjs.org/api/ngresource.$resource
in above link, there example:
// define creditcard class var creditcard = $resource('/user/:userid/card/:cardid', {userid:123, cardid:'@id'}, { charge: {method:'post', params:{charge:true}} }); // can retrieve collection server var cards = creditcard.query(function() { // get: /user/123/card // server returns: [ {id:456, number:'1234', name:'smith'} ]; var card = cards[0]; // each item instance of creditcard expect(card instanceof creditcard).toequal(true); card.name = "j. smith"; // non methods mapped onto instances card.$save(); // post: /user/123/card/456 {id:456, number:'1234', name:'j. smith'} // server returns: {id:456, number:'1234', name: 'j. smith'}; // our custom method mapped well. card.$charge({amount:9.99}); // post: /user/123/card/456?amount=9.99&charge=true {id:456, number:'1234', name:'j. smith'} }); // can create instance var newcard = new creditcard({number:'0123'}); newcard.name = "mike smith"; newcard.$save(); // post: /user/123/card {number:'0123', name:'mike smith'} // server returns: {id:789, number:'01234', name: 'mike smith'}; expect(newcard.id).toequal(789); there line:
var card = cards[0]; i have no idea array
cardscoming from. match found @ previous line , doesn't make sense me variable outside of function scope.for jasmine expect function, angular run , throw error?
there lines function expect(), such as:
expect(card instanceof creditcard).toequal(true); i know jasmine testing function, wonder if browser/angular directly runs don't see jasmine library in code.
to answer question 1. line referring (var card = cards[0];) occurring inside success callback of query method. means has executed, in turn means cards variable populated. cards variable not outside of scope, can referenced inside callback function, , other function matter. typically not use cards variable outside scope of success callback, it's asynchronous method.
please elaborate on question 2?
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