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How to check if a file exists in Go?
Go's standard library does not have a function solely intended to check if a file exists or not (like Python's os.path.exists ). What is the idiomatic way to do it?
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Why does IE9 switch to compatibility mode on my website?
.../9, but for internal websites, IE9 suddenly decides it's actually IE7, and doesn't have any HTML 5 support.
No, I don't quite understand this logic either.
My reluctant solution has been to test whether the browser has HTML 5 support (by creating a canvas, and testing if it's valid), and displayin...
Coalesce function for PHP?
...unction (returns the first non-NULL value, example ). PHP, sadly in 2009, does not.
9 Answers
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What's the difference between deadlock and livelock?
...or 1 second.
Why the beginLock would cost so much? If the lock is free is does not cost a lot (see https://stackoverflow.com/a/49712993/5397116), but if the lock is not free the OS will "freeze" your thread, setup a mechanism to wake you when the lock is freed, and then wake you again in the future...
String comparison using '==' vs. 'strcmp()'
...r than str2, and 0 if they are equal.
=== only returns true or false, it doesn't tell you which is the "greater" string.
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Using OpenSSL what does “unable to write 'random state'” mean?
...entry from the OpenSSL FAQ:
Sometimes the openssl command line utility does not abort with a "PRNG not seeded" error message, but complains that it is "unable to write 'random state'". This message refers to the default seeding file (see previous answer). A possible reason is that no default fil...
What does send() do in Ruby?
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What does send do?
send is another way of calling a method.
This is best illustrated by example:
o = Object.new
o.send(:to_s) # => "#<Object:0x00005614d7a24fa3>"
# is equivalent to:
o.to_s # => "#<Object:0x00005...
What does Expression.Quote() do that Expression.Constant() can’t already do?
...NQ's Expression.Quote method?” , but if you read on you will see that it doesn’t answer my question.
5 Answers
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What does the @ symbol represent in objective-c?
...have a typedef or #define behind them. For example, the compiler actually does treat id specially in terms of the pointer type conversion rules it applies to declarations, as well as to the decision of whether to generate GC write barriers.
Other exceptions are in, out, inout, oneway, byref, and b...
Bundler not including .min files
...our has changed in Microsoft.AspNet.Web.Optimization package and the tweak does not work anymore, as pointed out by many commenters. Right now I cannot reproduce the issue at all with the version 1.1.3 of the package.
Please see sources of System.Web.Optimization.BundleCollection (you can use dotPe...