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Random row selection in Pandas dataframe
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Something like this?
import random
def some(x, n):
return x.ix[random.sample(x.index, n)]
Note: As of Pandas v0.20.0, ix has been deprecated in favour of loc for label based indexing.
sha...
How to retrieve a single file from a specific revision in Git?
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Using git show
To complete your own answer, the syntax is indeed
git show object
git show $REV:$FILE
git show somebranch:from/the/root/myfile.txt
git show HEAD^^^:test/test.py
The command takes the usual style of revision, meaning you can use any of the following:
branch name...
Service Temporarily Unavailable Magento?
...there is a file called maintenance.flag and if so delete it.
Magento 1.x : maintenance.flag file is in : magento root directory
Magento 2.x : maintenance.flag file is in : var folder
When Magento is performing certain tasks it temporarily creates this file. Magento checks for its exist...
Reference: Comparing PHP's print and echo
...es sure that the return value for print is 1, as follows:
ZVAL_LONG(&EX_T(opline->result.var).tmp_var, 1);
(see here for reference)
The return value is a convenience should one wish to use print in a conditional expression. Why 1 and not 100? Well in PHP the truthiness of 1 or 100 is the...
Java String new line
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@the_prole explained here
– Prince John Wesley
Dec 8 '15 at 9:56
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More than 10 lines in a node.js stack error?
... debugger always displays full stack (bt command).
– x-yuri
Nov 17 '17 at 18:32
And apparently, stack trace doesn't fo...
FFmpeg on Android
...Android. Now I have to build either an application like RockPlayer or use existing Android multimedia framework to invoke FFmpeg.
...
What are allowed characters in cookies?
...cookie_spec the entire NAME=VALUE string is:
a sequence of characters excluding semi-colon, comma and white space.
So - should work, and it does seem to be OK in browsers I've got here; where are you having trouble with it?
By implication of the above:
= is legal to include, but potentially...
Using the rJava package on Win7 64 bit with R
.... However note that:
To use rJava in 32-bit R, you need Java for Windows x86
To use rJava in 64-bit R, you need Java for Windows x64
To build or check R packages with multi-arch (the default) you need to install both Java For Windows x64 as well as Java for Windows x86. On Win 64, the former inst...
Which C++ idioms are deprecated in C++11?
...ass support for rvalue references.
Safe bool: This was mentioned earlier. Explicit operators of C++11 obviate this very common C++03 idiom.
Shrink-to-fit: Many C++11 STL containers provide a shrink_to_fit() member function, which should eliminate the need swapping with a temporary.
Temporary Base Cl...