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C# DateTime.Now precision
I just ran into some unexpected behavior with DateTime.UtcNow while doing some unit tests. It appears that when you call DateTime.Now/UtcNow in rapid succession, it seems to give you back the same value for a longer-than-expected interval of time, rather than capturing more precise millisecond incre...
npm - install dependencies for a package in a different folder?
... the --prefix option. In your scenario the folder and prefix will be the same:
npm --prefix ./some_project install ./some_project
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What are all the valid self-closing elements in XHTML (as implemented by the major browsers)?
What are all the valid self-closing elements (e.g. ) in XHTML (as implemented by the major browsers)?
13 Answers
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What's the point of NSAssert, actually?
...o make sure a value is what its supposed to be. If an assertion fails that means something went wrong and so the app quits. One reason to use assert would be if you have some function that will not behave or will create very bad side effects if one of the parameters passed to it is not exactly some...
How do I pass multiple parameters into a function in PowerShell?
If I have a function which accepts more than one string parameter, the first parameter seems to get all the data assigned to it, and remaining parameters are passed in as empty.
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C++ equivalent of StringBuffer/StringBuilder?
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NOTE this answer has received some attention recently. I am not advocating this as a solution (it is a solution I have seen in the past, before the STL). It is an interesting approach and should only be applied over std::string or std::stringstream if after...
Recursive directory listing in DOS
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You sir, are seriously awesome! It worked like a charm! I used it at work (where we are forced to have windows machines) with gVIM! Really, really good! You saved me hours of headache!
– Walialu
Nov 27 '13 at 14:23...
Go: panic: runtime error: invalid memory address or nil pointer dereference
...il, err
}
I'm guessing that err is not nil. You're accessing the .Close() method on res.Body before you check for the err.
The defer only defers the function call. The field and method are accessed immediately.
So instead, try checking the error immediately.
res, err := client.Do(req)
if err != n...
The cast to value type 'Int32' failed because the materialized value is null
...inq-to-sql query isn't executed as code, but rather translated into SQL. Sometimes this is a "leaky abstraction" that yields unexpected behaviour.
One such case is null handling, where there can be unexpected nulls in different places. ...DefaultIfEmpty(0).Sum(0) can help in this (quite simple) ca...
Ways to eliminate switch in code [closed]
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Switch-statements are not an antipattern per se, but if you're coding object oriented you should consider if the use of a switch is better solved with polymorphism instead of using a switch statement.
With polymorphism, this:
foreach (...