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Difference between Select and ConvertAll in C#
.... The ConvertAll method exists since .NET 2.0 whereas LINQ was introduced with 3.5.
You should favor Select over ConvertAll as it works for any kind of list, but they do the same basically.
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Most common C# bitwise operations on enums
For the life of me, I can't remember how to set, delete, toggle or test a bit in a bitfield. Either I'm unsure or I mix them up because I rarely need these. So a "bit-cheat-sheet" would be nice to have.
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How to tell if a string is not defined in a Bash shell script
... answer you are after is implied (if not stated) by Vinko's answer, though it is not spelled out simply. To distinguish whether VAR is set but empty or not set, you can use:
if [ -z "${VAR+xxx}" ]; then echo VAR is not set at all; fi
if [ -z "$VAR" ] && [ "${VAR+xxx}" = "xxx" ]; then echo V...
What does the NS prefix mean?
Many classes in Cocoa/Cocoa Touch have the NS prefix. What does it mean?
9 Answers
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Import a file from a subdirectory?
.../tutorial/modules.html
In short, you need to put a blank file named
__init__.py
in the "lib" directory.
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Stop an input field in a form from being submitted
I'm writing some javascript (a greasemonkey/userscript) that will insert some input fields into a form on a website.
12 Ans...
What is the best way to iterate over a dictionary?
I've seen a few different ways to iterate over a dictionary in C#. Is there a standard way?
30 Answers
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Truststore and Keystore Definitions
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A keystore contains private keys, and the certificates with their corresponding public keys.
A truststore contains certificates from other parties that you expect to communicate with, or from Certificate Authorities that you trust to identify other parties.
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What REST PUT/POST/DELETE calls should return by a convention?
I've found a good post describing POST/PUT differences: POST vs PUT
But it still doesn't answer my question.
5 Answers
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Add directives from directive in AngularJS
...ild a directive that takes care of adding more directives to the element it is declared on.
For example, I want to build a directive that takes care of adding datepicker , datepicker-language and ng-required="true" .
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