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Differences between fork and exec
...d process (parent) as its parent PID (PPID). Because the two processes are now running exactly the same code, they can tell which is which by the return code of fork - the child gets 0, the parent gets the PID of the child. This is all, of course, assuming the fork call works - if not, no child is c...
Using global variables in a function
...bal variables are so dangerous, Python wants to make sure that you really know that's what you're playing with by explicitly requiring the global keyword.
See other answers if you want to share a global variable across modules.
...
Why is my Git Submodule HEAD detached from master?
...date <rebase|merge>
In the common cases, you already have fixed by now your DETACHED HEAD since it was related to one of the configuration issues above.
fixing DETACHED HEAD when .update = checkout
$ cd <submodule-path> # and make modification to your submodule
$ git add .
$ git comm...
How to change color of SVG image using CSS (jQuery SVG image replacement)?
... advantage is that it allows you to use CSS to change the color of the SVG now, like so:
svg:hover path {
fill: red;
}
The jQuery code I wrote also ports across the original images ID and classes. So this CSS works too:
#facebook-logo:hover path {
fill: red;
}
Or:
.social-link:hover p...
Visual Studio debugging “quick watch” tool and lambda expressions
...e function Example is run in the debugger it will stop at the Break line. Now imagine if the user typed the following into the watch window
(Func<int>)(() => v2);
In order to properly execute this the debugger (or more appropriate the EE) would need to create a closure for variable v2. ...
Getting Chrome to accept self-signed localhost certificate
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I don't know why this answer has been voted but there is a difference between Invalid certificate and self-signed certificate. The question is about self signed cert.
– Mehdi
Aug 24 '18 at 13:37
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CSS center text (horizontally and vertically) inside a div block
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There's now a display: table-cell property for that, FYI. Using it makes the element behave like a table cell and allows vertical-align: middle;
– Shauna
Apr 18 '11 at 14:38
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What's the $unwind operator in MongoDB?
...s.funded_year"
} }
])
If we look at the funding_rounds array, we know that for each funding_rounds, there is a raised_amount and a funded_year field. So, unwind will for each one of the documents that are elements of the funding_rounds array produce an output document. Now, in this example,...
Custom numeric format string to always display the sign
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Thank you, Kamil - I missed that. I have now corrected the force sign format: +#;-#;+0 (instead of +#;-#)
– Edward
Aug 25 '15 at 14:16
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Fastest way to list all primes below N
...tmp) )//const
del_mult(tmptk[off], start, prime)
# now we go back to top tk1, so we need to increase pos by 1
pos += 1
cpos = const * pos
# 30k + 1
if tk1[pos]:
prime = cpos + 1
p.append(prime)
lastadded = 1
...