scope

Limiting number of displayed results when using ngRepeat

由 早过忘川 提交于 2019-12-17 07:05:13
问题 I find the AngularJS tutorials hard to understand; this one is walking me through building an app that displays phones. I’m on step 5 and I thought as an experiment I’d try to allow users to specify how many they’d like to be shown. The view looks like this: <body ng-controller="PhoneListCtrl"> <div class="container-fluid"> <div class="row-fluid"> <div class="span2"> <!--Sidebar content--> Search: <input ng-model="query"> How Many: <input ng-model="quantity"> Sort by: <select ng-model=

Limiting number of displayed results when using ngRepeat

由 天涯浪子 提交于 2019-12-17 07:05:00
问题 I find the AngularJS tutorials hard to understand; this one is walking me through building an app that displays phones. I’m on step 5 and I thought as an experiment I’d try to allow users to specify how many they’d like to be shown. The view looks like this: <body ng-controller="PhoneListCtrl"> <div class="container-fluid"> <div class="row-fluid"> <div class="span2"> <!--Sidebar content--> Search: <input ng-model="query"> How Many: <input ng-model="quantity"> Sort by: <select ng-model=

Setting dynamic scope variables in AngularJs - scope.<some_string>

由 柔情痞子 提交于 2019-12-17 06:59:25
问题 I have a string I have gotten from a routeParam or a directive attribute or whatever, and I want to create a variable on the scope based on this. So: $scope.<the_string> = "something". However, if the string contains one or more dots I want to split it and actually "drill down" into the scope. So 'foo.bar' should become $scope.foo.bar . This means that the simple version won't work! // This will not work as assigning variables like this will not "drill down" // It will assign to a variables

Why do catch clauses have their own lexical environment?

由 不问归期 提交于 2019-12-17 06:51:35
问题 Consider the following excerpt from ECMA-262 v5.1 (which I recently saw in this question): A Lexical Environment is a specification type used to define the association of Identifiers to specific variables and functions based upon the lexical nesting structure of ECMAScript code. A Lexical Environment consists of an Environment Record and a possibly null reference to an outer Lexical Environment. Usually a Lexical Environment is associated with some specific syntactic structure of ECMAScript

JavaScript: Reference a functions local scope as an object

由 有些话、适合烂在心里 提交于 2019-12-17 06:41:28
问题 When I call a function, a local scope is erected for that call. Is there any way to directly reference that scope as an object? Just like window is a reference for the global scope object. Example: function test(foo){ var bar=1 //Now, can I access the object containing foo, bar, arguments and anything //else within the local scope like this: magicIdentifier.bar } Alternately, does anyone have a complete list of what is in the local scope on top of custom variables? Background: I'm trying to

globals and locals in python exec()

由 人盡茶涼 提交于 2019-12-17 06:11:48
问题 I'm trying to run a piece of python code using exec. my_code = """ class A(object): pass print 'locals: %s' % locals() print 'A: %s' % A class B(object): a_ref = A """ global_env = {} local_env = {} my_code_AST = compile(my_code, "My Code", "exec") exec(my_code_AST, global_env, local_env) print local_env which results in the following output locals: {'A': <class 'A'>} A: <class 'A'> Traceback (most recent call last): File "python_test.py", line 16, in <module> exec(my_code_AST, global_env,

Private inner classes in C# - why aren't they used more often?

由 只谈情不闲聊 提交于 2019-12-17 05:34:16
问题 I am relatively new to C# and each time I begin to work on a C# project (I only worked on nearly mature projects in C#) I wonder why there are no inner classes? Maybe I don't understand their goal. To me, inner classes -- at least private inner classes -- look a lot like "inner procedures" in Pascal / Modula-2 / Ada : they allow to break down a main class in smaller parts in order to ease the understanding. Example : here is what is see most of the time : public class ClassA { public MethodA(

javascript closure immediate evaluation [duplicate]

由 大憨熊 提交于 2019-12-17 05:12:47
问题 This question already has answers here : JavaScript closure inside loops – simple practical example (44 answers) Closed 5 years ago . Consider the following Javascript code: var a = []; var f = function() { for (var i = 0; i < 3; i++) { a.push(function(){alert(i)}); } for (var j = 0; j < 3; j++) { a[j](); } }; The alerts print out '3' all three times. I want a different behaviour - in each iteration of the loop generate a function that prints the current value of i. I.e. 3 functions that

javascript closure immediate evaluation [duplicate]

由 ↘锁芯ラ 提交于 2019-12-17 05:12:25
问题 This question already has answers here : JavaScript closure inside loops – simple practical example (44 answers) Closed 5 years ago . Consider the following Javascript code: var a = []; var f = function() { for (var i = 0; i < 3; i++) { a.push(function(){alert(i)}); } for (var j = 0; j < 3; j++) { a[j](); } }; The alerts print out '3' all three times. I want a different behaviour - in each iteration of the loop generate a function that prints the current value of i. I.e. 3 functions that

How to assign to a global variable in Sass?

由 梦想与她 提交于 2019-12-17 04:35:08
问题 I run this Sass code: $a: 1; @if 2 + 2 == 4 { $a: 2; } @debug $a; I expect to see 2. The output, however, is: Line 5 DEBUG: 1 I understand that Sass creates a new $a variable inside the @if scope. How can I change this behaviour and assign a value to the global $a ? I use Sass 3.4.0. 回答1: As you're using Sass 3.4+, you should append the !global flag to your variable declaration: $a: 1; @if 2 + 2 == 4 { $a: 2 !global; } @debug $a; // will output 2 The original SASS_REFERENCE on variable
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