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What is tail call optimization?
... an iterative loop. You can prefer imperative style. Many languages (Java, Python) doesn't provide TCO, then you have to know that a functional call costs memory... and the imperative style is prefered.
– mcoolive
Nov 7 '16 at 12:41
...
Asking the user for input until they give a valid response
...er enters data that can't be parsed.
while True:
try:
# Note: Python 2.x users should use raw_input, the equivalent of 3.x's input
age = int(input("Please enter your age: "))
except ValueError:
print("Sorry, I didn't understand that.")
#better try again... Re...
Combining Multiple Commits Into One Prior To Push
...change the git editor and process the git-rebase-todo file.
The tool using python below:
#!/usr/bin/env python3
#encoding: UTF-8
import os
import sys
def change_editor(current_file):
os.system("git config --local --replace-all core.editor " + current_file) # Set current_file as git editor
...
rreplace - How to replace the last occurrence of an expression in a string?
Is there a quick way in Python to replace strings but, instead of starting from the beginning as replace does, starting from the end? For example:
...
What is the definition of “interface” in object oriented programming
...y typed nature of some OO languages, as it is the case with Java or C#. In Python on the other hand, another mechanism is used:
import random
# Dependencies
class KnownNumber(object):
def generate(self):
return 5
class SecretNumber(object):
def generate(self):
return rand...
How to set the matplotlib figure default size in ipython notebook?
I use "$ipython notebook --pylab inline" to start the ipython notebook. The display matplotlib figure size is too big for me, and I have to adjust it manually. How to set the default size for the figure displayed in cell?
...
为什么我们程序员写不出好代码？ - 杂谈 - 清泛网 - 专注C/C++及内核技术
...它们，迫使人们不得不修改底层的代码。
当我试图兼顾Python 3.0和Python 2.7两个版本时，尽管Pyhton是一个相对稳定的版本，但我还是感到很烦。
在许多情况下，新的工具都没有得到十足的锻炼。例如，Node.js的确非常快，但只有...
What is tail recursion?
...he running_total is updated.
Note: The original answer used examples from Python. These have been changed to JavaScript, since Python interpreters don't support tail call optimization. However, while tail call optimization is part of the ECMAScript 2015 spec, most JavaScript interpreters don't supp...
Differences between Emacs and Vim
...Vim has a lot of weird levels to its programmability, with the addition of Python and Ruby bindings (and more, I forget), Vim is also programmable in most ways you'd care for.
I use Vim, and I'm fairly happy with it.
share
...
Extracting specific columns in numpy array
...
I think the solution here is not working with an update of the python version anymore, one way to do it with a new python function for it is:
extracted_data = data[['Column Name1','Column Name2']].to_numpy()
which gives you the desired outcome.
The documentation you can find here: ht...