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Multiple Models in a single django ModelForm?
...other place instance is not there. I'm not sure if this solution was fully tested before being posted so it might be better to go with the other answer using CombinedFormBase.
– robvdl
Jan 9 '19 at 4:37
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Convert a list of data frames into one data frame
... TRUE
My guess is that using do.call("rbind", ...) is going to be the fastest approach that you will find unless you can do something like (a) use a matrices instead of a data.frames and (b) preallocate the final matrix and assign to it rather than growing it.
Edit 1:
Based on Hadley's comment, ...
Extract traceback info from an exception object
...ored and inferred from the type of value." docs.python.org/3.7/library/… Tested in Python 3.7.3.
– Ciro Santilli 郝海东冠状病六四事件法轮功
May 18 '19 at 13:08
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How to use clock() in C++
...C, which tells you how many clock ticks occur in one second. Thus, you can test any operation like this:
clock_t startTime = clock();
doSomeOperation();
clock_t endTime = clock();
clock_t clockTicksTaken = endTime - startTime;
double timeInSeconds = clockTicksTaken / (double) CLOCKS_PER_SEC;
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How to run functions in parallel?
...ort ray
ray.init()
dir1 = 'C:\\folder1'
dir2 = 'C:\\folder2'
filename = 'test.txt'
addFiles = [25, 5, 15, 35, 45, 25, 5, 15, 35, 45]
# Define the functions.
# You need to pass every global variable used by the function as an argument.
# This is needed because each remote function runs in a diffe...
Using multiple arguments for string formatting in Python (e.g., '%s … %s')
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I have no way to test this (I don't know Python that much), but the examples seems to suggest that something like '{self.author} in {self.publication}'.format(self=self) should "work". I'm just not sure about the whole unicode thing.
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What is a lambda (function)?
...an primitive type.
Predicate<Integer> pred = x -> x % 2 == 0; // Tests if the parameter is even.
boolean result = pred.test(4); // true
Lua
adder = function(x)
return function(y)
return x + y
end
end
add5 = adder(5)
add5(1) == 6 -- true
Kotlin
val pred = { x: I...
How to identify platform/compiler from preprocessor macros?
...cy (perhaps a little pedantic) : the first #if ask if defined, the others test for value. If would be more consistent to do #elif defined(__unix__) , etc, I think.
– leonbloy
Jan 26 '16 at 22:36
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MVC (Laravel) where to add logic
... Interesting and valid thoughts. But I'm curious - how do you unit-test your business logic if it is tied to models which are tied to Eloquent, which is tied to database?
– JustAMartin
Aug 12 '15 at 6:28
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How do I get bash completion to work with aliases?
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Works like a charm on Linux (not tested on Mac). Thanks for writing it!
– bitmask
Mar 14 '18 at 10:23
1
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