ternary-operator

Is there a ternary operator or the like in PHP that acts like ?? of C#? ?? in C# is clean and shorter, but in PHP you have to do something like: // This is absolutely okay except that $_REQUEST['test'] is kind of redundant. echo isset($_REQUEST['test'])? $_REQUEST['test'] : 'hi'; // This is perfect! Shorter and cleaner, but only in this situation. echo null? : 'replacement if empty'; // This line gives error when $_REQUEST['test'] is NOT set. echo $_REQUEST['test']?: 'hi'; PHP 7 adds the null coalesce operator : // Fetches the value of $_GET['user'] and returns 'nobody' // if it does not exist

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 contrived example: $value = ( $a == $b ) ? 'true value # 1' : ( $a == $c ) ? 'true value # 2' : 'false value'; Personally which style you use, or find most readable? Edit: (on when to use ternary-operator) I usually avoid using more than 2 levels deep ternary operator. I tend prefer 2 levels deep ternary operator over 2 level if-else, when I'm echoing variables in PHP template scripts. The ternary operator is generally to be avoided, but this form can be quite

It's more about python list comprehension syntax. I've got a list comprehension that produces list of odd numbers of a given range: [x for x in range(1, 10) if x % 2] This makes a filter - I've got a source list, where I remove even numbers ( if x % 2 ). I'd like to use something like if-then-else here. Following code fails: >>> [x for x in range(1, 10) if x % 2 else x * 100] File "<stdin>", line 1 [x for x in range(1, 10) if x % 2 else x * 100] ^ SyntaxError: invalid syntax There is a python expression like if-else: 1 if 0 is 0 else 3 How to use it inside a list comprehension? shx2 x if y

This is what I wrote : $Myprovince = ( ($province == 6) ? "city-1" : ($province == 7) ? "city-2" : ($province == 8) ? "city-3" : ($province == 30) ? "city-4" : "out of borders" ); But for every field I got the value city-4 . I want to use ternary operators instead of switch/if because I want to experiment and see how it would be done. What's the problem with this code? codaddict Others have already suggested the right way of doing it but if you really want to use ternary operator you need to use parenthesis as: $province = 7; $Myprovince = ( ($province == 6) ? "city-1" : (($province == 7) ?

Possible Duplicate: quick php syntax question return $add_review ? FALSE : $arg; What do question mark and colon mean? Thanks Paul Dixon This is the PHP ternary operator (also known as a conditional operator) - if first operand evaluates true, evaluate as second operand, else evaluate as third operand. Think of it as an "if" statement you can use in expressions. Can be very useful in making concise assignments that depend on some condition, e.g. $param = isset($_GET['param']) ? $_GET['param'] : 'default'; There's also a shorthand version of this (in PHP 5.3 onwards). You can leave out the

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 == null ){ // Return Nothing } else { return Source; } [ 2 ] if ( Source == value ){ // Do Nothing }

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 just using {{}} rather than wrapping the content in html tags? Ben Lesh EDIT: 2Toad's answer below is what you