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Is it safe to parse a /proc/ file?
...code if you assume too much about the consistency of a file in /proc. For em>x m>ample, see this bug which came from assuming that /proc/mounts was a consistent snapshot.
For em>x m>ample:
/proc/uptime is totally atomic, as someone mentioned in another answer -- but only since Linum>x m> 2.6.30, which is less t...
Best practices for reducing Garbage Collector activity in Javascript
I have a fairly complem>x m> Javascript app, which has a main loop that is called 60 times per second. There seems to be a lot of garbage collection going on (based on the 'sawtooth' output from the Memory timeline in the Chrome dev tools) - and this often impacts the performance of the application.
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Convert int to ASCII and back in Python
...123456789'
nchars = len(s)
# string to int or long. Type depends on nchars
m>x m> = sum(ord(s[byte])<<8*(nchars-byte-1) for byte in range(nchars))
# int or long to string
''.join(chr((m>x m>>>8*(nchars-byte-1))&0m>x m>FF) for byte in range(nchars))
Yields '0123456789' and m>x m> = 22758109892968359442...
Why does this Java code compile?
...illegal because b is an illegal forward reference to b. You can actually fim>x m> this by writing int b = this.b + 1, which compiles without complaints.
For local variables, int d = d + 1 is illegal because d is not initialized before use. This is not the case for fields, which are always default-initia...
std::back_inserter for a std::set?
...td::inserter and pass it .begin():
std::set<int> s1, s2;
s1 = getAnEm>x m>citingSet();
transform(s1.begin(), s1.end(),
std::inserter(s2, s2.begin()), Em>x m>citingUnaryFunctor());
The insert iterator will then call s2.insert(s2.begin(), m>x m>) where m>x m> is the value passed to the iterator when w...
How to drop into REPL (Read, Eval, Print, Loop) from Python code
...ly force a Python script to drop into a REPL at an arbitrary point in its em>x m>ecution, even if the script was launched from the command line?
...
View list of all JavaScript variables in Google Chrome Console
...le you have to type the name of the public variable or object you want to em>x m>plore.
15 Answers
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Why does modern Perl avoid UTF-8 by default?
...stdin, stdout, and stderr to UTF‑8. Both these are global effects, not lem>x m>ical ones.
At the top of your source file (program, module, library, dohickey), prominently assert that you are running perl version 5.12 or better via:
use v5.12; # minimal for unicode string feature
use v5.14; # optimal...
Detecting a redirect in ajam>x m> request?
I want to use jQuery to GET a URL and em>x m>plicitly check if it responded with a 302 redirect, but not follow the redirect.
...
How to update the value stored in Dictionary in C#?
...ange the value. (?) At least, if it doesn't matter to overwrite keys, for em>x m>ample in a situation where it is not em>x m>cluded that keys are written more than once in a loop. Or does somebody see any disadvantages? Especially because .Add has the ptifall for beginners that if the if-wrapper or TryGetVal...