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How to remove from a map while iterating it?
...roduces the loop variable that is directly usable as the value, and so no knowledge of the container is required inside the loop. This is a clue to the intended usage of the RBFL for loops that do not have to know about the container. Erasing is the complete opposite situation, where it's all about ...
What's the proper way to install pip, virtualenv, and distribute for Python?
...the environment.
$INITIAL_ENV/bin/pip install virtualenv-$VERSION.tar.gz
Now you can use your "bootstrap" environment to create more:
# Create a second environment from the first:
$INITIAL_ENV/bin/virtualenv py-env1
# Create more:
$INITIAL_ENV/bin/virtualenv py-env2
Go nuts!
Note
This assumes...
Serializing class instance to JSON
...
The basic problem is that the JSON encoder json.dumps() only knows how to serialize a limited set of object types by default, all built-in types. List here: https://docs.python.org/3.3/library/json.html#encoders-and-decoders
One good solution would be to make your class inherit from J...
module.exports vs exports in Node.js
... want to export a constructor function then there is something you should know about using module.exports or exports;(Remember again that module.exports will be returned when you require something, not export).
module.exports = function Something() {
console.log('bla bla');
}
Now typeof retur...
How to printf uint64_t? Fails with: “spurious trailing ‘%’ in format”
... requested.
#define __STDC_FORMAT_MACROS
#include <inttypes.h>
... now PRIu64 will work
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Is it intended by the C++ standards committee that in C++11 unordered_map destroys what it inserts?
...ehaviour, you observe, which always moves, is a bug in libstdc++, which is now fixed according to a comment on the question. For those curious, I took a look at the g++-4.8 headers.
bits/stl_map.h, lines 598-603
template<typename _Pair, typename = typename
std::enable_if<std::is...
putting current class as return type annotation [duplicate]
...
So now after a while I can say that decision I took was using -> 'Graph' instead of -> Graph. It does not make my IDE (PyCharm) able to recognize a type this way but it just works well enough for documentation purposes.
A...
Any reason not to use '+' to concatenate two strings?
...n, results in unnecessary function calls which could add to the overhead.
Now coming back to the question. Should one discourage the use of + over join in all cases?
I believe no, things should be taken into consideration
Length of the String in Question
No of Concatenation Operation.
And off-...
How can I use threading in Python?
...nction are provided by two libraries:multiprocessing, and also its little known, but equally fantastic step child:multiprocessing.dummy.
multiprocessing.dummy is exactly the same as multiprocessing module, but uses threads instead (an important distinction - use multiple processes for CPU-intensive...
How to automatically generate N “distinct” colors?
...dividing the RGB cube into a lattice and then drawing points. Does anyone know any other methods? I'm ruling out defining a list and then just cycling through it. I should also say I don't generally care if they clash or don't look nice, they just have to be visually distinct.
...