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Linq: What is the difference between Select and Where
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Where
finds items that match and only returns those that do (filtering).
-> IEnumerable<A> in, IEnumerable<A> out
Select
returns something for all items in the source (projection / transformation). That something might...
C# equivalent of the IsNull() function in SQL Server
...er you can use the IsNull() function to check if a value is null, and if it is, return another value. Now I am wondering if there is anything similar in C#.
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MySQL query to get column names?
...`TABLE_SCHEMA`='yourdatabasename'
AND `TABLE_NAME`='yourtablename';
It's VERY powerful, and can give you TONS of information without need to parse text (Such as column type, whether the column is nullable, max column size, character set, etc)...
Oh, and it's standard SQL (Whereas SHOW ... is...
Convert hex string to int
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It's simply too big for an int (which is 4 bytes and signed).
Use
Long.parseLong("AA0F245C", 16);
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How to test chrome extensions?
Is there a good way to do this? I'm writing an extension that interacts with a website as a content script and saves data using localstorage. Are there any tools, frameworks, etc. that I can use to test this behavior? I realize there are some generic tools for testing javascript, but are those suffi...
How to sort with a lambda?
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Got it.
sort(mMyClassVector.begin(), mMyClassVector.end(),
[](const MyClass & a, const MyClass & b) -> bool
{
return a.mProperty > b.mProperty;
});
I assumed it'd figure out that the > operator retu...
Is there a printf converter to print in binary format?
I can print with printf as a hex or octal number. Is there a format tag to print as binary, or arbitrary base?
52 Answer...
Quit and restart a clean R session from within R?
Is there a way I can make an alias, within R, that will execute q() and then restart a clean R session?
12 Answers
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How to make the first option of selected with jQuery
How do I make the first option of selected with jQuery?
27 Answers
27
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How can I get the timezone name in JavaScript?
I know how to get the timezone offset, but what I need is the ability to detect something like "America/New York." Is that even possible from JavaScript or is that something I am going to have to guestimate based on the offset?
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