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C# Linq Group By on multiple columns [duplicate]
...ring and group on that, but that would require more code elsewhere. So, in my mind, this answer is the cleanest way regardless how many properties.
– Enigmativity
Aug 21 '15 at 23:03
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“Invalid signature file” when attempting to run a .jar
My java program is packaged in a jar file and makes use of an external jar library, bouncy castle . My code compiles fine, but running the jar leads to the following error:
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ActionController::InvalidAuthenticityToken
Below is an error, caused by a form in my Rails application:
24 Answers
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Reference one string from another string in strings.xml?
I would like to reference a string from another string in my strings.xml file, like below (specifically note the end of the "message_text" string content):
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Why is there no logical xor in JavaScript?
...ainly because it's not useful. Bitwise XOR is extremely useful, but in all my years of programming I have never needed a logical XOR.
If you have two boolean variables you can mimic XOR with:
if (a != b)
With two arbitrary variables you could use ! to coerce them to boolean values and then use t...
Removing duplicate values from a PowerShell array
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This also solves my next problem which is how do I sort it. Thanks!
– Registered User
May 18 '12 at 16:38
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Why does C# forbid generic attribute types?
...mation either, although it does provide an example of what's not allowed.
My copy of the annotated C# 3 spec should arrive tomorrow... I'll see if that gives any more information. Anyway, it's definitely a language decision rather than a runtime one.
EDIT: Answer from Eric Lippert (paraphrased): n...
Why would I prefer using vector to deque
... double-ended vector.) I have written an implementation linked to below in my answer. It can be as fast as a vector but much more widely applicable (e.g., when making a fast queue).
– user541686
Aug 26 '13 at 9:04
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inline conditionals in angular.js
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Angular 1.1.5 added support for ternary operators:
{{myVar === "two" ? "it's true" : "it's false"}}
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How do I make JavaScript beep?
I want my web page to beep whenever a user exceeds the maximum character limit of my <textarea> .
16 Answers
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