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How can I open multiple files using “with open” in Python?
I want to change a couple of files at one time, iff I can write to all of them. I'm wondering if I somehow can combine the multiple open calls with the with statement:
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Find XOR of all numbers in a given range
... ^ 3 ^ 4 .. ^ b
b is greater than a, so just by safely dropping in a few extra brackets (which we can because it's associative), we can also say this:
f(b) = ( 0 ^ 1 ^ 2 ^ 3 ^ 4 .. ^ (a-1) ) ^ (a ^ a+1 ^ a+2 .. ^ b)
Which simplifies to:
f(b) = f(a-1) ^ (a ^ a+1 ^ a+2 .. ^ b)
f(b) = f(a-...
Rails DB Migration - How To Drop a Table?
... ActiveRecord::Migration
def change
drop_table :users do |t|
t.string :email, null: false
t.timestamps null: false
end
end
end
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Why does Ruby 1.9.2 remove “.” from LOAD_PATH, and what's the alternative?
... LOAD_PATH , so this broke them (they reported "no such file to load" for all require statements that based off the project path). Was there a particular justification for doing this?
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How do I set a ViewModel on a window in XAML using DataContext property?
...wModel and set it as datacontext. In your statement it just consider it as string value.
<Window x:Class="BuildAssistantUI.BuildAssistantWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
x...
What is “android.R.layout.simple_list_item_1”?
...id/platform_frameworks_base/tree/master/core/res/res/layout )
You can actually view the code for the layouts.
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How can I shuffle the lines of a text file on the Unix command line or in a shell script?
... stdin input, but alternatively also filename arguments
The functions take extra steps to handle SIGPIPE in the usual way (quiet termination with exit code 141), as opposed to breaking noisily. This is important when piping the function output to a pipe that is closed early, such as when piping to h...
How do I check for C++11 support?
...t have (partial) compiler-level support versus a standard C++ library with all the C++11 changes.
So Boost's defines mentioned in another answer remain the only sane way to figure out if there is, for example, support for C++11 threads and other specific parts of the standard.
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How to get a specific output iterating a hash in Ruby?
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oh never mind. I saw that it was for string interpolation
– committedandroider
Nov 3 '18 at 23:17
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How to write LaTeX in IPython Notebook?
...vec{\mathbf{B}} & = 0
\end{align}
Math object to pass in a raw LaTeX string:
from IPython.display import Math
Math(r'F(k) = \int_{-\infty}^{\infty} f(x) e^{2\pi i k} dx')
Latex class. Note: you have to include the delimiters yourself. This allows you to use other LaTeX modes such as eqnarra...