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PHP foreach change original array values
...don't pass by reference" or "passing by reference is evil". Less likely to start a flame war. :)
– Sean the Bean
Oct 3 '17 at 20:24
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Which is better, number(x) or parseFloat(x)?
...have standard numeric input, there's no difference. However, if your input starts with a number and then contains other characters, parseFloat truncates the number out of the string, while Number gives NaN (not a number):
parseFloat('1x'); // => 1
Number('1x'); // => NaN
In addition, Number...
Use email address as primary key?
...t e-mail, making it pretty damn hard to change ...
... and I haven't even started talking about performance considerations.
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REST API - why use PUT DELETE POST GET?
...P that you can take advantage of if you're using a truly restful API. I'd start with authentication.
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__FILE__, __LINE__, and __FUNCTION__ usage in C++
...inal source files. For example:
#line 100
Will make the following lines start with __LINE__ 100. You can optionally add a new file-name
#line 100 "file.c"
It's only rarely useful. But if it is needed, there are no alternatives I know of. Actually, instead of the line, a macro can be used too w...
Wait for all promises to resolve
...ctions are complete. There will likely be multiple $q.alls, however once I start the resolution process, no new actions/promises will be chained.
– jensengar
Feb 13 '14 at 19:18
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Django - what is the difference between render(), render_to_response() and direct_to_template()?
... the Django noob (i.e. me) - almost certainly a simplification, but a good starting point?
render_to_response() is the "original", but requires you putting context_instance=RequestContext(request) in nearly all the time, a PITA.
direct_to_template() is designed to be used just in urls.py without a...
Chrome Dev Tools - Modify javascript and reload
... around, but one way you can achieve this is by adding a breakpoint at the start of the javascript file or block you want to manipulate.
Then when you reload, the debugger will pause on that breakpoint, and you can make any changes you want to the source, save the file and then run the debugger thr...
Using IPython notebooks under version control
....post_save_hook = post_save
to the jupyter_notebook_config.py file and restarting the notebook server.
If you aren't sure in which directory to find your jupyter_notebook_config.py file, you can type jupyter --config-dir, and if you don't find the file there, you can create it by typing jupyter...
Python assigning multiple variables to same value? list behavior
...etc. family, it may help you to stop thinking about a as a "variable", and start thinking of it as a "name".
a, b, and c aren't different variables with equal values; they're different names for the same identical value. Variables have types, identities, addresses, and all kinds of stuff like that....