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How to hide the keyboard when I press return key in a UITextField?
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adding <UITextFieldDelegate> in .h file and set delegate in viewdidload [yourTextField setDelegate:self]; will complete it!
– Umit Kaya
Jul 16 '15 at 5:35
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grep exclude multiple strings
I am trying to see a log file using tail -f and want to exclude all lines containing the following strings:
7 Answers
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Rails how to run rake task
... answered Apr 12 '11 at 21:24
Andrew MarshallAndrew Marshall
87.3k1818 gold badges202202 silver badges204204 bronze badges
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remove all variables except functions
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You can use the following command to clear out ALL variables. Be careful because it you cannot get your variables back.
rm(list=ls(all=TRUE))
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Docker EXPOSE a port only to Host
Is docker capable of exposing a port only to the host and not to the outside.
1 Answer
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How to see if an NSString starts with a certain other string?
...Why 5? This is not an NSArray... Index 4 is the 4th character not the 5th! And have you EVER seen Http or hTtP? Case sensitive is not relevant. Also the question was about checking if the string begins with http not about the string being shorter than 4 characters. hasPrefix: is better but this work...
Automate ssh-keygen -t rsa so it does not ask for a passphrase
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OK this was because I used dzdo command in front of it, so I had to write: dzdo -i -u target_user ssh-keygen -f id_rsa -t rsa -N "''"
– Anthony O.
Dec 9 '15 at 15:09
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How do I delete/remove a shell function?
... A couple people have answered with:
unset z
but if you have a function and a variable named z only the variable will be unset, not the function.
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Generating a drop down list of timezones with PHP
... site in the users preferred timezone. Below are two lists that I found and then one method using the built in PHP DateTime class in PHP 5.
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What does a \ (backslash) do in PHP (5.3+)?
...mbol is used in namespaces. It is the start symbol to indicate a namespace and also serves as a separator between sub-namespace names.
See official documentation about
namespacing.
Opcache
Additionally in PHP 7.0+ some functions are replaced with opcodes by OPCache, which makes these specific fu...