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When is del useful in python?

...ss :) – Sreenikethan I Jul 19 at 15:32 yeah that's a good idea, have an extra 4 lines of code after each for loop, see...
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What's an easy way to read random line from a file in Unix command line?

...from the Camel Book: perl -e 'srand; rand($.) < 1 && ($line = $_) while <>; print $line;' file This has a significant advantage in space over reading the whole file in. You can find a proof of this method in The Art of Computer Programming, Volume 2, Section 3.4.2, by Donald E. K...
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What does the “@” symbol do in Powershell?

...ted May 26 '19 at 9:57 user2368632 49511 gold badge44 silver badges1616 bronze badges answered Feb 22 '09 at 5:07 ...
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The relationship could not be changed because one or more of the foreign-key properties is non-nulla

...iginal parent including the child item collection var originalParent = _dbContext.ParentItems .Where(p => p.ID == parent.ID) .Include(p => p.ChildItems) .SingleOrDefault(); // We assume that the parent is still in the DB and don't check for null // Update s...
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In PHP, can you instantiate an object and call a method on the same line?

...So, if you declared a class like this : class Test { public function __construct($param) { $this->_var = $param; } public function myMethod() { return $this->_var * 2; } protected $_var; } You can then declare a function that returns an instance of that ...
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How to handle invalid SSL certificates with Apache HttpClient? [duplicate]

... Gray 106k2020 gold badges258258 silver badges325325 bronze badges answered Dec 1 '09 at 20:52 KevinKevin 28.8k99 gold badge...
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How to add multiple font files for the same font?

I'm looking at the MDC page for the @font-face CSS rule , but I don't get one thing. I have separate files for bold , italic and bold + italic . How can I embed all three files in one @font-face rule? For example, if I have: ...
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Using Jasmine to spy on a function without an object

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Windows XP or later Windows: How can I run a batch file in the background with no window displayed?

...with '-h'): call ShellRunJS.bat "notepad.exe" -style 0 -wait no 4) 'Win32_ProcessStartup' - again full wrapper and all options are accessible through the command line arguments.This time it's WSF/batch hybrid with some Jscript and some VBScript pieces of code - but it returns the PID of the star...
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Devise form within a different controller

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