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Why would a JavaScript variable start with a dollar sign? [duplicate]
...ifier". By identifier I mean the standard CS definition which is a lexical token that is not a keyword in the language. In this case $ and jQuery are two different identifiers that reference the same value. But they are both identifiers nonetheless.
– Benry
Jul...
Test for existence of nested JavaScript object key
...his will allow you to safely access deeply nested properties, by using the token ?., the new optional chaining operator:
const value = obj?.level1?.level2?.level3
If any of the levels accessed is null or undefined the expression will resolve to undefined by itself.
The proposal also allows you ...
AngularJS - Value attribute on an input text box is ignored when there is a ng-model used?
...an elegant way. I had to capture a value on a hidden input (a Symfony form token, generated in the server).
– PachinSV
Jul 26 '14 at 16:58
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Semicolons superfluous at the end of a line in shell scripts?
...
| & ; ( ) < > space tab
control operator
A token that performs a control function. It is one of the following symbols:
|| & && ; ;; ( ) | |& <newline>
So, the ; can be metacharacter or control operator, while the ;; is always a contr...
When should I use the HashSet type?
... HashSet<string> of all the valid commands, so whenever I hit a @xxx token in the lexer, I use validCommands.Contains(tokenText) as my O(1) validity check. I really don't care about anything except existence of the command in the set of valid commands. Lets look at the alternatives I faced:
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Build query string for System.Net.HttpClient get
...rwrite q!")
// extensions provided by Flurl.Http:
.WithOAuthBearerToken("token")
.GetJsonAsync<TResult>();
Check out the docs for more details. The full package is available on NuGet:
PM> Install-Package Flurl.Http
or just the stand-alone URL builder:
PM> Install-Packag...
Why do people use __(double underscore) so much in C++
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The foregoing comments are correct. __Symbol__ is generally a magic token provided by your helpful compiler (or preprocessor) vendor. Perhaps the most widely-used of these are __FILE__ and __LINE__, which are expanded by the C preprocessor to indicate the current filename and line number. T...
Get value from JToken that may not exist (best practices)
...if you combine it with nullable value types and the ?? operator:
width = jToken.Value<double?>("width") ?? 100;
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How to add a line break in C# .NET documentation
...ara>
/// Rather than return SQL, this method returns a string with icon-tokens, which
/// could be used to represent the search in a condensed pictogram format.
/// </summary>
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“Unknown provider: aProvider
...all from invoke in injector.js, recognizable from the "Incorrect injection token" string:
The locals parameter (mangled to d in my code) gives a pretty good idea about which object in your source is the problem:
A quick grep over our source finds many instances of modalInstance, but going from...