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MySQL: Fastest way to count number of rows
...olumn indexes, so it will be the best result. Mysql with MyISAM engine actually stores row count, it doensn't count all rows each time you try to count all rows. (based on primary key's column)
Using PHP to count rows is not very smart, because you have to send data from mysql to php. Why do it whe...
How find all unused classes in Intellij Idea?
There is an inspection "Unused declaration" which can find all unused code in Intellij Idea. (see this question )
But I want to find all unused classes, not methods, variables etc. Only classes. (it is difficult to find only classes in 3000 result list). How I can do that?
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Removing cordova plugins from the project
Somehow in my app many of the cordova plugins are installed and because of that it requires access to almost everything - from my contacts to current location ( even though this app doesn't need this ).
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Converting Symbols, Accent Letters to English Alphabet
...e are thousands of characters in the Unicode chart and I want to convert all the similar characters to the letters which are in English alphabet.
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Why is Spring's ApplicationContext.getBean considered bad?
...g question: Auto-cast Spring Beans and had multiple people respond that calling Spring's ApplicationContext.getBean() should be avoided as much as possible. Why is that?
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How to remove all click event handlers using jQuery?
I'm having a problem. Basically, when a user clicks an 'Edit' link on a page, the following Jquery code runs:
5 Answers
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How can one change the timestamp of an old commit in Git?
...c hash of the commit you're looking to fix.
This will invalidate that and all future hashes.
Example:
If you wanted to change the dates of commit 119f9ecf58069b265ab22f1f97d2b648faf932e0, you could do so with something like this:
git filter-branch --env-filter \
'if [ $GIT_COMMIT = 119f9ecf5...
Dynamically creating keys in a JavaScript associative array
All the documentation I've found so far is to update keys that are already created:
9 Answers
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Why does the arrow (->) operator in C exist?
...as two questions: 1) why -> even exists, and 2) why . does not automatically dereference the pointer. Answers to both questions have historical roots.
Why does -> even exist?
In one of the very first versions of C language (which I will refer as CRM for "C Reference Manual", which came with ...
Are HTTP cookies port specific?
...e network attacker. Similarly, cookies for a given host are shared across all the ports on that host, even though the usual "same-origin policy" used by web browsers isolates content retrieved via different ports.
And also:
8.5. Weak Confidentiality
Cookies do not provide isolation by p...