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Asking the user for input until they give a valid response
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+750
The simplest way to accomplish this is to put the input method in a while loop. Use continue when you get bad input, and break out of ...
Rank function in MySQL
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270
One option is to use a ranking variable, such as the following:
SELECT first_name,
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How can I use xargs to copy files that have spaces and quotes in their names?
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200
You can combine all of that into a single find command:
find . -iname "*foobar*" -exec cp -- "...
ng-model for `` (with directive DEMO)
... }
reader.readAsDataURL(changeEvent.target.files[0]);
});
}
}
}]);
And the input tag becomes:
<input type="file" fileread="vm.uploadme" />
Or if just the file definition is needed:
.directive("fileread", [function () {
return {
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Store output of subprocess.Popen call in a string
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answered Mar 23 '10 at 19:14
Mike GrahamMike Graham
60.5k1212 gold badges8484 silver badges119119 bronze badges
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Is there a way to instantiate objects from a string holding their class name?
...Map()->find(s);
if(it == getMap()->end())
return 0;
return it->second();
}
protected:
static map_type * getMap() {
// never delete'ed. (exist until program termination)
// because we can't guarantee correct destruction order
if(!...
Android: Vertical ViewPager [closed]
... // This page is way off-screen to the left.
view.setAlpha(0);
} else if (position <= 1) { // [-1,1]
view.setAlpha(1);
// Counteract the default slide transition
view.setTranslationX(view.getWidth() * -position);
...
Random number generation in C++11: how to generate, how does it work? [closed]
...uppose you have a simple random number generator that generate the numbers 0, 1, ..., 10 each with equal probability (think of this as the classic rand()). Now you want a random number in the range 0, 1, 2, each with equal probability. Your knee-jerk reaction would be to take rand() % 3. But wait, t...
The tilde operator in Python
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204
It is a unary operator (taking a single argument) that is borrowed from C, where all data types...
CSS – why doesn’t percentage height work? [duplicate]
... width of a block element is independent of its content and saying width: 50% yields a well defined number of pixels.
However, the height of a block element depends on its content unless you specify a specific height. So there is feedback between the parent and child where height is concerned and s...