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How to use sed/grep to extract text between two words?
... Here and last string or match them individually. In terms of regex, it is called as greedy match (first case) or non-greedy match (second case)
$ echo 'Here is a string, and Here is another string.' | grep -oP '(?<=Here).*(?=string)' # Greedy match
is a string, and Here is another
$ echo 'Her...
What is the difference between YAML and JSON?
What are the differences between YAML and JSON, specifically considering the following things?
13 Answers
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rake db:schema:load vs. migrations
...gets more complex and if we have the much cleaner rake db:schema:load to call instead, why do migrations exist at all?
7 ...
Are there other whitespace codes like   for half-spaces, em-spaces, en-spaces etc useful in HTML
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Firefox renders all of the above spaces as the same width, wider than one space in the font, except for nbsp, where it renders as one space and imposes the non-breaking character. A real shame. There are cases where only a character will do, for instance when padding is being c...
Capturing multiple line output into a Bash variable
...at can be used subsequently !
say myscript output is redirected to a file called myscript_output
awk '{while ( (getline var < "myscript_output") >0){print var;} close ("myscript_output");}'
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How to securely save username/password (local)?
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If you are just going to verify/validate the entered user name and password, use the Rfc2898DerivedBytes class (also known as Password Based Key Derivation Function 2 or PBKDF2). This is more secure than using encryption like Triple DES or AES because there i...
Detect If Browser Tab Has Focus
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The question is specifically about detecting whether a page has focus, which is different from detecting whether the page is visible. Multiple pages can be visible at the same time (in different windows), while only one can have focus. Use whicheve...
How to build for armv6 and armv7 architectures with iOS 5
...in a manner that allows the app to run without crashing under iOS4. Specifically, we tested for iOS5 capabilities before trying to use them, and linked iOS5-only libraries as Optional.
So, supporting iPhone3G in an iOS5 world could just as easily mean "we want our app to run on iOS4 and above (rega...
Does this app use the Advertising Identifier (IDFA)? - AdMob 6.8.0
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@Ricardo Yes it works. Basically this tells you in which files or libs advertisingIdentifier is used. Then you just need to lookup on those files/libs to see what they really going on with IDFA. So for AdMob you need to look on their guidelines or on t...
What is ANSI format?
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Technically, ANSI should be the same as US-ASCII. It refers to the ANSI X3.4 standard, which is simply the ANSI organisation's ratified version of ASCII. Use of the top-bit-set characters is not defined in ASCII/ANSI as it is a 7-b...