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Can Python test the membership of multiple values in a list?
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This does what you want, and will work in nearly all cases:
>>> all(x in ['b', 'a', 'foo', 'bar'] for x in ['a', 'b'])
True
The expression 'a','b' in ['b', 'a', 'foo', 'bar'] doesn't work as expected because Python interprets it as a tupl...
Swift performSelector:withObject:afterDelay: is unavailable [duplicate]
... answered Jun 11 '14 at 19:11
brandonscriptbrandonscript
53.6k2929 gold badges131131 silver badges197197 bronze badges
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Some font-size's rendered larger on Safari (iPhone)
...le of how to apply this to your body, just for the iPhone:
@media screen and (max-device-width: 480px){
body{
-webkit-text-size-adjust: none;
}
}
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Counting the number of elements with the values of x in a vector
... x creates a logical vector which is TRUE at every location that x occurs, and when suming, the logical vector is coerced to numeric which converts TRUE to 1 and FALSE to 0.
However, note that for floating point numbers it's better to use something like: sum(abs(numbers - x) < 1e-6).
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Python memoising/deferred lookup property decorator
...f the instance, but they're a real bottleneck to calculate that first time and only really accessed for special cases. Hence they can also be cached after they've been retrieved from the database (this therefore fits the definition of memoisation where the input is simply "no input").
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Get a pixel from HTML Canvas?
....getContext('2d');
// Get the CanvasPixelArray from the given coordinates and dimensions.
var imgd = context.getImageData(x, y, width, height);
var pix = imgd.data;
// Loop over each pixel and invert the color.
for (var i = 0, n = pix.length; i < n; i += 4) {
pix[i ] = 255 - pix[i ]; // r...
Is sizeof(bool) defined in the C++ language standard?
I can't find an answer in the standard documentation. Does the C++ language standard require sizeof(bool) to always be 1 (for 1 byte), or is this size implementation-defined?
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Debugging App When Launched by Push Notification
...several different types of push notifications my app can receive. The PHP handles this and sends different packets of information to my app which are all received just fine.
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How do I assert equality on two classes without an equals method?
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@PiotrAleksanderChmielowski, sorry, when working with Spring+JPA+Entities, the Entity object may have an id (representing the id field of the database table), so when it is empty (a new object not yet stored on the DB), refEq fails to c...
Adding values to a C# array
Probably a really simple one this - I'm starting out with C# and need to add values to an array, for example:
23 Answers
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