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What does ~~ (“double tilde”) do in Javascript?
I was checking out an online game physics library today and came across the ~~ operator. I know a single ~ is a bitwise NOT, would that make ~~ a NOT of a NOT, which would give back the same value, wouldn't it?
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What is a proper naming convention for MySQL FKs?
... users(user_id);
I try to stick with the same field names in referencing and referenced tables, as in user_id in the above example. When this is not practical, I also append the referenced field name to the foreign key name.
This naming convention allows me to "guess" the symbolic name just by l...
upstream sent too big header while reading response header from upstream
...orrect response, you should show how to determine the correct buffer sizes and why that matters. Otherwise it's a shot in the dark. See here for getting an idea on sizing: gist.github.com/magnetikonline/…
– Wes Johnson
Sep 9 '14 at 15:37
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How to do something to each file in a directory with a batch script
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Command line usage:
for /f %f in ('dir /b c:\') do echo %f
Batch file usage:
for /f %%f in ('dir /b c:\') do echo %%f
Update: if the directory contains files with space in the names, you need to change the delimiter the for...
Find an element in DOM based on an attribute value
...there is any DOM API which search for an element with given attribute name and attribute value:
7 Answers
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How to increase the vertical split window size in Vim
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CTRL-W >
and
CTRL-W <
to make the window wider or narrower.
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How to commit changes to a new branch
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You can do a git status to see what is currently staged and what is not.
– John Brodie
Feb 1 '13 at 22:20
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Limiting floats to two decimal points
...ing point numbers that not all numbers can be represented exactly. The command line is just showing you the full floating point form from memory.
With floating point representation, your rounded version is the same number. Since computers are binary, they store floating point numbers as an integer ...
GSON - Date format
...in Gson output, but .setDateFormat(DateFormat.FULL) doesn't seem to work and it the same with .registerTypeAdapter(Date.class, new DateSerializer()) .
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How to center absolute div horizontally using CSS?
I've a div and want it to be centered horizontally - although I'm giving it margin:0 auto; it's not centered...
8 Answers...