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How to search by key=>value in a multidimensional array in PHP
...th a suitable algorithm.
Linear algorithms in this case perform at O(n) (order total number of elements in entire array), this is poor, a million entries (eg a 1000x100x10 array) would take on average 500,000 iterations to find the needle. Also what would happen if you decided to change the struct...
How to copy Java Collections list
...low copy of a within b. All elements will exist within b in the exact same order that they were within a (assuming it had an order).
Similarly, calling
// note: instantiating with a.size() gives `b` enough capacity to hold everything
List<String> b = new ArrayList<String>(a.size());
Co...
What does the exclamation mark do before the function?
...iling semicolon, and yet that will give the flexibility to put them in any order with no worry.
!function abc(){}();
!function bca(){}();
Will work the same as
!function abc(){}();
(function bca(){})();
but saves one character and arbitrary looks better.
And by the way any of +,-,~,void opera...
How do I declare a namespace in JavaScript?
...o safely add to the same namespace when they don't know in advance in what order they will execute. This can be helpful either if you want to be able to reorder your script inclusions arbitrarily without breaking your code, or if you want to load scripts asynchronously with the async attribute and s...
How to retrieve a single file from a specific revision in Git?
...pposed to git show, which allows you to save it under a different name, in order for you to get and see both (the current version and the old version). It is unclear from the question if the OP wants to replace its current version by an old one.
– VonC
Jun 6 '1...
How do I install cURL on cygwin?
...
In order to use the command-line version of curl, you need the curl executable.
So, run the Cygwins Setup.exe, and select curl (under Net->curl). That one uses libcurl3, which is located in Libs->libcurl3. But libcurl3 wil...
Tools for JPEG optimization? [closed]
...ic (5-15% with no loss in quality), which is amazing, because it's just re-ordering the progressive scan ordering AFAIK (you might notice the same in other programs, files sometimes get marginally smaller in Photoshop if you choose different number of scans, for no apparent reason). Also, it was mad...
Command not found when using sudo
...
Permission denied
In order to run a script the file must have an executable permission bit set.
In order to fully understand Linux file permissions you can study the documentation for the chmod command. chmod, an abbreviation of change mode, is ...
What is a postback?
...
Why does it happen?
The web application is running on the web server. In order to process the user’s response, cause the application state to change, or move to a different page, you need to get some code to execute on the web server. The only way to achieve this is to collect up all the informa...
Git format-patch to be svn compatible?
...d -e 's/.*:refs\/remotes\///'`
REV=`git svn find-rev $(git rev-list --date-order --max-count=1 $TRACKING_BRANCH)`
git diff --no-prefix $(git rev-list --date-order --max-count=1 $TRACKING_BRANCH) $* |
sed -e "s/^+++ .*/& (working copy)/" -e "s/^--- .*/& (revision $REV)/" \
-e "s/^diff -...