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ruby convert array into function arguments
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104
You can turn an Array into an argument list with the * (or "splat") operator:
a = [0, 1, 2, 3...
Check whether a string contains a substring
...ns substring you can use the index function:
if (index($str, $substr) != -1) {
print "$str contains $substr\n";
}
It will return the position of the first occurrence of $substr in $str, or -1 if the substring is not found.
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Modulo operation with negative numbers
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How to store CGRect values in NSMutableArray?
...ay mutableArray];
[array addObject:[NSValue valueWithCGRect:CGRectMake(0,0,10,10)]];
CGRect someRect = [[array objectAtIndex:0] CGRectValue];
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Python group by
...ume that I have a set of data pair where index 0 is the value and index 1 is the type:
6 Answers
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In which order should floats be added to get the most precise result?
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Microbit 板载引脚 · App Inventor 2 中文网
...取micro:bit引脚配置状态，特别是每个引脚配置为数字(0或1)还是模拟(0到255)。成功读取后，将触发PinADConfigurationReceived事件。
ReadPinData – 从micro:bit读取单次引脚状态样本。成功读取后，将触发PinDataReceived事件。在读取引脚前...
How to export plots from matplotlib with transparent background?
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Use the matplotlib savefig function with the keyword argument transparent=True to save the ima...
How to set std::tuple element by index?
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127
std::get returns a reference to the value. So you set the value like this:
std::get<0>(...
Change UICollectionViewCell size on different device orientations
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1) You could maintain and swap out multiple layout objects, but there's a simpler way. Just add the following to your UICollectionViewController subclass and adjust the sizes as required:
- (CGSize)collectionView:(UICollecti...