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How to make System.out.println() shorter
...World");
IDE keyboard shortcuts
IntelliJ IDEA and NetBeans:
you type sout then press TAB, and it types System.out.println() for you, with the cursor in the right place.
Eclipse:
Type syso then press CTRL + SPACE.
Other
Find a "snippets" plugin for your favorite text editor/IDE
Static Import
import ...
Get statistics for each group (such as count, mean, etc) using pandas GroupBy?
... B 4
C D 3
E F 2
G H 1
dtype: int64
Then let's use .size().reset_index(name='counts') to get the row counts:
In [4]: df.groupby(['col1', 'col2']).size().reset_index(name='counts')
Out[4]:
col1 col2 counts
0 A B 4
1 C D 3
2 E F...
Can an enum class be converted to the underlying type?
...
I think you can use std::underlying_type to know the underlying type, and then use cast:
#include <type_traits> //for std::underlying_type
typedef std::underlying_type<my_fields>::type utype;
utype a = static_cast<utype>(my_fields::field);
With this, you don't have to assume ...
PHP Get name of current directory
... $cur_dir[count($cur_dir)-1];
if your dir is www\var\path\ Current_Path
then this returns Current_path
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java get file size efficiently
...ts, etc.) besides getting the length. If we try to get rid of these things then for one call I get the following times in microseconds:
file sum___19.0, per Iteration___19.0
raf sum___16.0, per Iteration___16.0
channel sum__273.0, per Iteration__273.0
For 100 runs and 10000 iterations I g...
Convert data.frame column format from character to factor
...all. E.g., col_nums <- c(1, 6, 7:9, 21:23, 27:28, 30:31, 39, 49:55, 57) then df[,col_nums] <- lapply(df[,col_nums] , factor).
– WGray
Aug 8 '14 at 17:17
...
Use of 'prototype' vs. 'this' in JavaScript?
...ussed here). Where a function is called on an object (e.g. myObj.method()) then this within the method references the object. Where this is not set by the call or by the use of bind, it defaults to the global object (window in a browser) or in strict mode, remains undefined.
JavaScript is an object-...
OOP vs Functional Programming vs Procedural [closed]
...m to reflect what you wrote. You say they don't have "pros and cons", and then say how they are different approaches. Why would someone choose one approach over another, based on any given situation? strengths and weaknesses, pros and cons, whatever you call them they do exist! I'm not saying on...
Good ways to manage a changelog using git?
...ting, etc. At some point you have to write it yourself though, of course.
Then you could create a new section for the changelog once per version:
git log [opts] vX.X.X..vX.X.Y | helper-script > changelogs/X.X.Y
and commit that in your version release commit.
If your problem is that those com...
How To Format A Block of Code Within a Presentation? [closed]
... microsoft product) it will paste the code in whatever color your IDE had. Then you just need to copy the text out of word and into your desired application and it will paste as rich text.
I've only seen this work across Visual Studio to other Microsoft products though so I don't know if it will be...