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| // 1: how could you rewrite the following to make it shorter? | |
| if (foo) { | |
| bar.doSomething(el); | |
| } else { | |
| bar.doSomethingElse(el); | |
| } | |
| // 2: what is the faulty logic in the following code? | |
| var foo = 'hello'; | |
| (function() { | |
| var foo = foo || 'world'; | |
| console.log(foo); | |
| })(); | |
| // 3: given the following code, how would you override the value of the bar | |
| // property for the variable foo without affecting the value of the bar | |
| // property for the variable bim? what if you did want to affect the value of | |
| // the bar property for both foo and bim? | |
| var Thinger = function() { | |
| return this; | |
| }; | |
| Thinger.prototype = { | |
| bar : 'baz' | |
| }; | |
| var foo = new Thinger(), | |
| bim = new Thinger(); | |
| // 4: given the following code, and assuming that each defined object has a | |
| // 'destroy' method, how would you destroy all of the objects contained in the | |
| // myObjects object? | |
| var myObjects = { | |
| thinger : new myApp.Thinger(), | |
| gizmo : new myApp.Gizmo(), | |
| widget : new myApp.Widget() | |
| }; | |
| // 5: given the following array, create an array that contains the contents of | |
| // each array item repeated three times, with a space between each item. so, | |
| // for example, if an array item is 'foo' then the new array should contain an | |
| // array item 'foo foo foo'. (you can assume jQuery, dojo, or underscore is | |
| // available) | |
| var myArray = [ 'foo', 'bar', 'baz' ]; | |
| // 6: what potential issues do you see with the following code? how would you fix it? | |
| $(document).ready(function() { | |
| $('.foo #bar').css('color', 'red'); | |
| $('.foo #bar').css('border', '1px solid blue'); | |
| $('.foo #bar').text('new text!'); | |
| $('.foo #bar').click(function() { | |
| $(this).attr('title', 'new title'); | |
| $(this).width('100px'); | |
| }); | |
| $('.foo #bar').click(); | |
| }); | |
| // 7: what issues do you see with the following code? how would you fix it? | |
| (function() { | |
| var foo; | |
| dojo.xhrGet({ | |
| url : 'foo.php', | |
| load : function(resp) { | |
| foo = resp.foo; | |
| } | |
| }); | |
| if (foo) { | |
| // run this important code | |
| } | |
| })(); | |
| // 8: how could you rewrite the following code to make it shorter? | |
| $('li.foo a').attr('title', 'i am foo'); | |
| $('li.bar a').attr('title', 'i am bar'); | |
| $('li.baz a').attr('title', 'i am baz'); | |
| $('li.baz a').attr('title', 'i am baz'); | |
| $('li.bop a').attr('title', 'i am bop'); | |
| // 9: how would you improve the following code? | |
| for (i = 0; i <= 100; i++) { | |
| $('#thinger').append('<p><span class="thinger">i am thinger ' + i + '</span></p>'); | |
| $('#gizmo').append('<p><span class="gizmo">i am gizmo ' + i + '</span></p>'); | |
| } | |
| // 10: a user enters their desired tip into a text box; the baseTotal, tax, | |
| // and fee values are provided by the application. what are the potential | |
| // issues with the following function for calculating the total? | |
| function calculateTotal(baseTotal, tip, tax, fee) { | |
| return baseTotal + tip + tax + fee; | |
| } | |
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