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Python JSON serialize a Decimal object
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17 Answers
17
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Sort a list of tuples by 2nd item (integer value) [duplicate]
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Try using the key keyword with sorted().
sorted([('abc', 121),('abc', 231),('abc', 148), ('abc',221)], key=lambda x: x[1])
key should be a function that identifies how to retrieve the comparable element from your data structure. In your case, it is the second element of the tupl...
How can you determine a point is between two other points on a line segment?
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127
Check if the cross product of (b-a) and (c-a) is 0, as tells Darius Bacon, tells you if the po...
How can I replace a regex substring match in Javascript?
That replaces the entire string str with 1 . I want it to replace the matched substring instead of the whole string. Is this possible in Javascript?
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How to override trait function and call it from the overridden function?
...one was almost there:
trait A {
function calc($v) {
return $v+1;
}
}
class MyClass {
use A {
calc as protected traitcalc;
}
function calc($v) {
$v++;
return $this->traitcalc($v);
}
}
The trait is not a class. You can't access its member...
How to set child process' environment variable in Makefile
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158
Make variables are not exported into the environment of processes make invokes... by default. ...
getting the screen density programmatically in android?
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19 Answers
19
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Python OpenCV2 (cv2) wrapper to get image size?
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213
cv2 uses numpy for manipulating images, so the proper and best way to get the size of an image ...
Find and replace string values in list
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edited Aug 27 '19 at 12:55
Teymour Aldridge
1,12966 silver badges2020 bronze badges
answered ...
How do I select elements of an array given condition?
Suppose I have a numpy array x = [5, 2, 3, 1, 4, 5] , y = ['f', 'o', 'o', 'b', 'a', 'r'] . I want to select the elements in y corresponding to elements in x that are greater than 1 and less than 5.
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