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What is declarative programming? [closed]
...n you write your code in such a way that it describes what you want to do, and not how you want to do it. It is left up to the compiler to figure out the how.
Examples of declarative programming languages are SQL and Prolog.
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Difference between std::result_of and decltype
I have some trouble understanding the need for std::result_of in C++0x. If I understood correctly, result_of is used to obtain the resulting type of invoking a function object with certain types of parameters. For example:
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Resize image in PHP
...0, 0, 0, 0, $newwidth, $newheight, $width, $height);
return $dst;
}
And you could call this function, like so...
$img = resize_image(‘/path/to/some/image.jpg’, 200, 200);
From personal experience, GD's image resampling does dramatically reduce file size too, especially when resampling ...
Why is extending native objects a bad practice?
... get a perfomance hit? Do they fear that somebody does it "the wrong way", and adds enumerable types to Object , practically destroying all loops on any object?
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After array_filter(), how can I reset the keys to go in numerical order starting at 0
...d array_filter to remove entries that had only the value '' from an array, and now I want to apply certain transformations on it depending on the placeholder starting from 0, but unfortunately it still retains the original index. I looked for a while and couldn't see anything, perhaps I just missed...
Type of conditional expression cannot be determined because there is no implicit conversion between
... conditional expression b ? x : y, there are three possibilities, either x and y both have a type and certain good conditions are met, only one of x and y has a type and certain good conditions are met, or a compile-time error occurs. Here, "certain good conditions" means certain conversions are pos...
How to match any non white space character except a particular one?
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When is ^ interpreted as negation and when as line beginning ? In that respect, why this wont match a line starting with number of white spaces $0~/\s*^\s/
– Alexander Cska
Mar 26 '19 at 21:43
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PHP exec() vs system() vs passthru()
...hey have slightly different purposes.
exec() is for calling a system command, and perhaps dealing with the output yourself.
system() is for executing a system command and immediately displaying the output - presumably text.
passthru() is for executing a system command which you wish the raw re...
Use NUnit Assert.Throws method or ExpectedException attribute?
...ype being thrown in another method call. Here, you target the exact method and not the whole test. Even though your test should call very little code, you're never too safe. Especially when code becomes complex and/or exception too generic. Stuff like "ArgumentNullExceptions" can be thrown a lot and...
When is finally run if you throw an exception from the catch block?
...is the finally block called? Before the throwing of e or is finally called and then catch?
7 Answers
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