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Conventions for exceptions or error codes
...tion can then contain code to check whether the file exists, or is locked, etc)
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Should I prefer pointers or references in member data?
... require
Whenever a reference is used it looks like value type (. operator etc), but behaves like a pointer (can dangle) - so e.g. Google Style Guide discourages it
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Algorithm to get the excel-like column name of a number
...recursive function (Based on zero indexed numbers, meaning 0 == A, 1 == B, etc)...
function getNameFromNumber($num) {
$numeric = $num % 26;
$letter = chr(65 + $numeric);
$num2 = intval($num / 26);
if ($num2 > 0) {
return getNameFromNumber($num2 - 1) . $letter;
} else ...
Maximum concurrent Socket.IO connections
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For +300k concurrent connection:
Set these variables in /etc/sysctl.conf:
fs.file-max = 10000000
fs.nr_open = 10000000
Also, change these variables in /etc/security/limits.conf:
* soft nofile 10000000
* hard nofile 10000000
root soft nofile 10000000
root hard nofile 10000000
...
Color in git-log
...olor when interpolating %d (decoration), %h (short commit
object name), etc. for terminal output.)
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How do I free my port 80 on localhost Windows?
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it just gave me bytes , unicast etc etc. did not give what is bound on port 80. Did I miss anything?
– Aashish
Apr 25 '09 at 6:35
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How do you pass multiple enum values in C#?
...s. If you do not take care of defining the values as, for example, 1,2,4,8 etc, you will have problems.
– Denis Troller
Jun 23 '09 at 0:54
1
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Optimal number of threads per core
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If your threads don't do I/O, synchronization, etc., and there's nothing else running, 1 thread per core will get you the best performance. However that very likely not the case. Adding more threads usually helps, but after some point, they cause some performance degradat...
How to change the value of ${user} variable used in Eclipse templates
...ection for Maven users, giving the ability to include version, artifactId, etc. in templates.
Fortunately, EGit, which is an Eclipse tool for Git, provides very flexible means for including many different variables in code templates. The only requirement is that your project uses Git. If you don’...
sh: 0: getcwd() failed: No such file or directory on cited drive
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getcwd gets the current working directory and if the directory is deleted or moved it will be unhappy! See Linux Manual for getcwd
– Hooman
Jan 8 '15 at 21:51
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