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Find difference between timestamps in seconds in PostgreSQL
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Converting user input string to regular expression
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@holms regex101.com is a great regex online tool as well
– Fran Herrero
Jul 18 '16 at 8:38
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How to align a div to the top of its parent but keeping its inline-block behaviour?
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31
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MySQL: Selecting multiple fields into multiple variables in a stored procedure
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11
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Open URL in same window and in same tab
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You need to use the name attribute:
window.open("https://www.youraddress.com","_self")
Edit: Url should be prepended with protocol. Without it tries to open relative url. Tested in Chrome 59, Firefox 54 and IE 11.
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How to get a specific version of a file in Mercurial?
I am new to Mercurial. Just cannot find the right command. Tried update/checkout with no luck. I am using local repository. Thanks
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How to abandon a hg merge?
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You can discard uncommitted changes with the -C (or --clean) flag:
hg update -C -r 3
BEWARE: Everything that was not committed will be gone!
After that you should probably use some kind of code formatter tool to do the entire operation, or...
Is there any way to view the currently mapped keys in Vim?
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You can do that with the :map command. There are also other variants.
:nmap for normal mode mappings
:vmap for visual mode mappings
:imap for insert mode mappings
The above list is not complete. Typing :help map in Vim will give you more info.
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Using “like” wildcard in prepared statement
...l RDBMS the world is aware of? Perhaps '%' || ? || '%' as mentioned in 1st comment was better, after all? I don't have the opportunity to experiment right now.
– BalusC
Dec 23 '15 at 22:47
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What are best practices for validating email addresses on iOS 2.0
...ess explains in great detail that the grammar specified in RFC 5322 is too complicated for primitive regular expressions.
I recommend a real parser approach like MKEmailAddress.
As quick regular expressions solution see this modification of DHValidation:
- (BOOL) validateEmail: (NSString *) can...