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Difference between “and” and && in Ruby?
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Actually the guide now says to avoid and/or completely, and they might have a point. Often their usage in control flow could be more obviously written with if/unless operators anyway (e.g. document.save! unless document.saved?)
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Jelly Bean DatePickerDialog — is there a way to cancel?
... if (mCallBack != null) mDatePicker.clearFocus();
super.onStop();
}
Now if someone can tell me how I can propose a patch/bug report to Android, I'd be glad to. Meanwhile, I suggested a possible fix (simple) as an attached version of DatePickerDialog.java in the Issue there.
Concept to avoid ...
How to concatenate two strings in C++?
...td::string greet = s + " World"; //concatenation easy!
Easy, isn't it?
Now if you need char const * for some reason, such as when you want to pass to some function, then you can do this:
some_c_api(s.c_str(), s.size());
assuming this function is declared as:
some_c_api(char const *input, si...
How can I specify a branch/tag when adding a Git submodule?
... conglomerate of other answers, but I think it may be more complete.
You know you have a Git submodule when you have these two things.
Your .gitmodules has an entry like so:
[submodule "SubmoduleTestRepo"]
path = SubmoduleTestRepo
url = https://github.com/jzaccone/SubmoduleTestRepo.git
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Repairing Postgresql after upgrading to OSX 10.7 Lion
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It's a PATH issue. Mac OSX Lion includes Postgresql in the system now. If you do a which psql you'll likely see usr/bin/psql instead of usr/local/bin/psql which is HomeBrew's correct one. If you run brew doctor you should get a message stating that you need to add usr/local/bin to the head ...
How do I resolve the “java.net.BindException: Address already in use: JVM_Bind” error?
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If you know what port the process is running you can type:
lsof -i:<port>.
For instance, lsof -i:8080, to list the process (pid) running on port 8080.
Then kill the process with kill <pid>
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“No newline at end of file” compiler warning
... foo.cpp. What if the last line of foo.h was a comment without a new line? Now the first line of foo.cpp is commented out. These are just a couple of examples of the types of problems that can creep up.
Just wanted to point any interested parties to James' answer below. While the above answer is ...
Does IE9 support console.log, and is it a real function?
...rowsers. I just spent a day working out why IE9 doesn't like my script and now I know why - it had a console.log in the very first step. Impossible to debug, since turning debug mode made this bug go away in an instant :P Thanks for clarification!!
– f055
Jul 1...
PHP Constants Containing Arrays?
...estion was made in 2009! This syntax will be nearly useless for most users now-a-days. Almost anyone has PHP 5.6 on their servers. The other answers are perfectly fine since they also offer alternatives. The accepted answer is the only viable way so far, if you don't want to use classes.
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How to swap two variables in JavaScript
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anyone knows the name of such kind of swap in es6?
– derek
Apr 10 '16 at 5:09
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