ternary-operator

Ternary operator in AngularJS templates

由 荒凉一梦 提交于 2019-11-26 11:02:59
How do you do a ternary with AngularJS (in the templates)? It would be nice to use some in html attributes (classes and style) instead of creating and calling a function of the controller. Mark Rajcok Update : Angular 1.1.5 added a ternary operator , so now we can simply write <li ng-class="$first ? 'firstRow' : 'nonFirstRow'"> If you are using an earlier version of Angular, your two choices are: (condition && result_if_true || !condition && result_if_false) {true: 'result_if_true', false: 'result_if_false'}[condition] item 2. above creates an object with two properties. The array syntax is

What is the idiomatic Go equivalent of C&#39;s ternary operator?

由 大城市里の小女人 提交于 2019-11-26 10:14:54
问题 In C/C++ (and many languages of that family), a common idiom to declare and initialize a variable depending on a condition uses the ternary conditional operator : int index = val > 0 ? val : -val Go doesn\'t have the conditional operator. What is the most idiomatic way to implement the same piece of code as above ? I came to the following solution, but it seems quite verbose var index int if val > 0 { index = val } else { index = -val } Is there something better ? 回答1: As pointed out (and

What is a Question Mark “?” and Colon “:” Operator Used for? [duplicate]

由 主宰稳场 提交于 2019-11-26 10:12:57
This question already has an answer here: What is the Java ?: operator called and what does it do? 16 answers Two questions about using a question mark "?" and colon ":" operator within the parentheses of a print function: What do they do? Also, does anyone know the standard term for them or where I can find more information on their use? I've read that they are similar to an 'if' 'else' statement. int row = 10; int column; while (row >= 1) { column = 1; while(column <= 10) { System.out.print(row % 2 == 1 ? "<" : "\r>"); ++column; } --row; System.out.println(); } Brendan Long This is the

JavaScript if alternative [duplicate]

由 家住魔仙堡 提交于 2019-11-26 09:58:55
问题 This question already has an answer here: Question mark and colon in JavaScript 7 answers What does this bit of code represent? I know it\'s some kind of if alternative syntax... pattern.Gotoccurance.score != null ? pattern.Gotoccurance.score : \'0\' Update: What\'s the need for this sort of coding? Is this more efficient or just a shortened version with the same efficiency? 回答1: It is the conditional operator, it is equivalent to something like this: if (pattern.Gotoccurance.score != null) {

Which coding style you use for ternary operator? [closed]

由 半世苍凉 提交于 2019-11-26 09:24:59
问题 As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. Closed 7 years ago . I keep it in single line, if it\'s short. Lately I\'ve been using this style for longer or nested ternary operator expressions. A

How to concatenate multiple ternary operator in PHP?

由 喜夏-厌秋 提交于 2019-11-26 08:29:18
问题 I use ternary operators alot but I can\'t seem to stack multiple ternary operator inside each other. I am aware that stacking multiple ternary operator would make the code less readable but in some case I would like to do it. This is what I\'ve tried so far : $foo = 1; $bar = ( $foo == 1 ) ? \"1\" : ( $foo == 2 ) ? \"2\" : \"other\"; echo $bar; // display 2 instead of 1 What is the correct syntax ? 回答1: Those parenthesis are what I think is getting you. Try $foo = 1; $bar = ($foo == 1) ? "1"

Prettiness of ternary operator vs. if statement [closed]

由 泄露秘密 提交于 2019-11-26 08:08:22
问题 I\'m browsing through some code and I found a few ternary operators in it. This code is a library that we use, and it\'s supposed to be quite fast. I\'m thinking if we\'re saving anything except for space there. What\'s your experience? 回答1: Performance The ternary operator shouldn't differ in performance from a well-written equivalent if / else statement... they may well resolve to the same representation in the Abstract Syntax Tree, undergo the same optimisations etc.. Things you can only

?: ?? Operators Instead Of IF|ELSE

由 谁说我不能喝 提交于 2019-11-26 07:56:29
问题 public string Source { get { /* if ( Source == null ){ return string . Empty; } else { return Source; } */ return Source ?? string.Empty; } set { /* if ( Source == null ) { Source = string . Empty; } else { if ( Source == value ) { Source = Source; } else { Source = value; } } */ Source == value ? Source : value ?? string.Empty; RaisePropertyChanged ( \"Source\" ); } } Can I use ?: ?? operators EXACTLY as If/Else? My Question : How to write the following with ?: ?? operators [ 1 ] if ( Source

inline conditionals in angular.js

由 断了今生、忘了曾经 提交于 2019-11-26 07:54:51
问题 I was wondering if there is a way in angular to conditionally display content other than using ng-show etc. For example in backbone.js I could do something with inline content in a template like: <% if (myVar === \"two\") { %> show this<% } %> but in angular, I seem to be limited to showing and hiding things wrapped in html tags <p ng-hide=\"true\">I\'m hidden</p> <p ng-show=\"true\">I\'m shown</p> What is the recommended way in angular to conditionally show and hide inline content in angular

Ternary operator and string concatenation quirk?

由 |▌冷眼眸甩不掉的悲伤 提交于 2019-11-26 06:44:16
问题 Hi I just want to know why this code yields (at least for me) an incorrect result. Well, probably i\'m in fault here $description = \'Paper: \' . ($paperType == \'bond\') ? \'Bond\' : \'Other\'; I was guessing that if paperType equals \'Bond\' then description is \'Paper: Bond\' and if paperType is not equals to \'Bond\' then description is \'Paper: Other\'. But when I run this code the results are description is either \'Bond\' or \'Other\' and left me wondering where the string \'Paper: \'
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