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What is “point free” style (in Functional Programming)?
...you specify the arguments explicitly):
sum (x:xs) = x + (sum xs)
sum [] = 0
Point-free (sum doesn't have any explicit arguments - it's just a fold with + starting with 0):
sum = foldr (+) 0
Or even simpler: Instead of g(x) = f(x), you could just write g = f.
So yes: It's closely related to c...
How can I negate the return-value of a process?
...m negate -process that negates the value a process returns. It should map 0 to some value != 0 and any value != 0 to 0, i.e. the following command should return "yes, nonexistingpath doesn't exist":
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awk without printing newline
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answered Jan 7 '10 at 16:56
CodeRainCodeRain
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Regex to replace everything except numbers and a decimal point
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Use this:
document.getElementById(target).value = newVal.replace(/[^0-9.]/g, "");
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What exactly does an #if 0 … #endif block do?
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edited May 17 '10 at 21:31
answered May 17 '10 at 21:24
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Creating dataframe from a dictionary where entries have different lengths
Say I have a dictionary with 10 key-value pairs. Each entry holds a numpy array. However, the length of the array is not the same for all of them.
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Converting file size in bytes to human-readable string
...ng, floppy disks use a mixture of the two systems - their 1MB is actually 1024000 bytes.
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Convert int to char in java
...ascii value 49 (one corresponding to '1')
If you want to convert a digit (0-9), you can add 48 to it and cast, or something like Character.forDigit(a, 10);.
If you want to convert an int as in ascii value, you can use Character.toChars(48) for example.
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How to change UIPickerView height
...time, e.g:
smallerPicker = [[UIPickerView alloc] initWithFrame:CGRectMake(0.0, 0.0, 320.0, 120.0)];
You will discover that at various heights and widths, there are visual glitches. Obviously, these glitches would either need to be worked around somehow, or choose another size that doesn't exhibit ...
How do I add 1 day to an NSDate?
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Swift 5.0 :
var dayComponent = DateComponents()
dayComponent.day = 1 // For removing...