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Is iterating ConcurrentHashMap values thread safe?
...o : someConcurrentHashMap.entrySet()) {
// ...
}
will be fine (or at least safe) almost every time you see it.
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How can I shuffle the lines of a text file on the Unix command line or in a shell script?
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You can use shuf. On some systems at least (doesn't appear to be in POSIX).
As jleedev pointed out: sort -R might also be an option. On some systems at least; well, you get the picture. It has been pointed out that sort -R doesn't really shuffle but instead sor...
Turn off constraints temporarily (MS SQL)
... It is not true that PKs and unique constraint cannot be disabled. At least in more recent version of SQL Server it works. For example, see: techonthenet.com/sql_server/primary_keys.php
– Dejan
May 16 '15 at 12:23
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Appending an element to the end of a list in Scala
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That's because you shouldn't do it (at least with an immutable list).
If you really really need to append an element to the end of a data structure and this data structure really really needs to be a list and this list really really has to be immutable then do eih...
iPad Web App: Detect Virtual Keyboard Using JavaScript in Safari?
...ly, you would expect this to not be visible to the user. Unfortunately, at least when running in the Simulator, the iPad visibly (though quickly) scrolls up and down again. Still, it works, at least in some specific situations.
I've tested this on an iPad, and it seems to work fine.
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Calling shell functions with xargs
...fining functions in a .bashrc or other script, you can wrap the file or at least the function definitions with a setting of allexport:
set -o allexport
function funcy_town {
echo 'this is a function'
}
function func_rock {
echo 'this is a function, but different'
}
function cyber_func {
echo...
How to only find files in a given directory, and ignore subdirectories using bash
...t level, ls -l /dev/abc-* /dev/*/abc-* | fgrep -v /dev/.udev ... except at least on my Linux /dev/*/* does not include files in /dev/.udev/* so you can omit the fgrep -v.
– tripleee
Oct 10 '11 at 16:29
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Why is whitespace sometimes needed around metacharacters?
... do, since & is a metacharacter. Therefore, your tattoo should have at least one space character.
:(){ :|:&};:
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Fixing slow initial load for IIS
...r companies and individuals) are.
ASP.NET MVC Overhead
My site takes at least 30 seconds when it hasn't been hit in over 20 minutes (and the web app has been stopped). It is terrible.
Another Way to Test Performance
There's another way to test if it is your ASP.NET MVC start up or something e...
how to get the cookies from a php curl into a variable
... EXIST A BETTER WAY TO GET COOKIES.. good grief this looks ugly..
//at least it's tested and seems to work perfectly...
$grabCookieName = function($str)
{
$ret = "";
$i = 0;
for ($i = 0; $i < strlen($str); ++$i) {
if ($str[$i] === ' ') {
...