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How to deal with floating point number precision in JavaScript?
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From the Floating-Point Guide:
What can I do to avoid this problem?
That depends on what kind of
calculations you’re doing.
If you really need your results to add up exactly, especially when you
work wi...
Why does comparing strings using either '==' or 'is' sometimes produce a different result?
...orks interactively is that (most) string literals are interned by default. From Wikipedia:
Interned strings speed up string
comparisons, which are sometimes a
performance bottleneck in applications
(such as compilers and dynamic
programming language runtimes) that
rely heavily on hash ...
URLWithString: returns nil
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LOL, I copied a URL from an email and this happened! Thanks.
– Echelon
Jan 30 '15 at 17:37
1
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How do I auto-reload a Chrome extension I'm developing?
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I am guessing we should call chrome.runtime.reload() from the background script
– Alexander Mills
Jan 1 '18 at 23:49
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Split long commands in multiple lines through Windows batch file
...member that the caret and the newline that follows it are removed entirely from the command, so if you put it where a space would be required (such as between parameters), be sure to include the space as well (either before the ^, or at the beginning of the next line — that latter choice may help...
How does the bitwise complement operator (~ tilde) work?
...peration is a complement, not a negation.
Consider that ~0 = -1, and work from there.
The algorithm for negation is, "complement, increment".
Did you know? There is also "one's complement" where the inverse numbers are symmetrical, and it has both a 0 and a -0.
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How to make a node.js application run permanently?
On a Debian server, I installed Node.js. I understand how to launch an app from putty with this command line:
19 Answers
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Change IPython/Jupyter notebook working directory
...reference in front of the command. If that doesn't work please try working from the earlier version. Very conveniently, now "Start in:" can be empty in my tests with 4.1.1 and later. Perhaps they read this entry on SO and liked it, so long upvotes, nobody needs this anymore :)
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How do I find all of the symlinks in a directory tree?
...nts information
about files, the information used shall be taken from the prop‐
erties of the file to which the link points, not from the link
itself (unless it is a broken symbolic link or find is unable to
examine the file to which the link points). U...
TypeError: method() takes 1 positional argument but 2 were given
...does indeed have two arguments - it's just that the first one is implicit, from the point of view of the caller.
This is because most methods do some work with the object they're called on, so there needs to be some way for that object to be referred to inside the method. By convention, this first ...