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Shortcut to comment out a block of code with sublime text
...
Ctrl-/ will insert // style commenting, for javascript, etc
Ctrl-/ will insert <!-- --> comments for HTML,
Ctrl-/ will insert # comments for Ruby,
..etc
But does not work perfectly on HTML <script> tags.
HTML <script> ..blah.. </script> tags:
Ctrl-/ twice...
how to read System environment variable in Spring applicationContext
...ing system environment variables (i.e. OS-level variables set with export, etc), it only allows reading Java system properties.
– amoe
Nov 15 '13 at 13:24
2
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UnicodeDecodeError when redirecting to file
...ers are mostly unrelated to computers: one can draw them on a chalk board, etc., like for instance بايثون, 中蟒 and ????. "Characters" for machines also include "drawing instructions" like for example spaces, carriage return, instructions to set the writing direction (for Arabic, etc.), acc...
Getting a list of associative array keys
...ck note. Be wary of using for..in if you use a library (jQuery, Prototype, etc.), as most of them add methods to created Objects (including dictionaries).
This will mean that when you loop over them, method names will appear as keys. If you are using a library, look at the documentation and look for...
How to view UTF-8 Characters in VIM or Gvim
...
In Linux, Open the VIM configuration file
$ sudo -H gedit /etc/vim/vimrc
Added following lines:
set fileencodings=utf-8,ucs-bom,gb18030,gbk,gb2312,cp936
set termencoding=utf-8
set encoding=utf-8
Save and exit, and terminal command:
$ source /etc/vim/vimrc
At this time VIM wil...
Passing a 2D array to a C++ function
... TwoD>
void myFunction(TwoD& myArray){
myArray[x][y] = 5;
etc...
}
// call with
double anArray[10][10];
myFunction(anArray);
It works with any 2D "array-like" datastructure, such as std::vector<std::vector<T>>, or a user defined type to maximize code reuse.
...
Using do block vs braces {}
...u are doing a small operation, for example, a method call or a comparison, etc. so this makes perfect sense:
some_collection.each { |element| puts element }
But if you have slightly complex logic that goes to multiple lines then use do .. end like:
1.upto(10) do |x|
add_some_num = x + rand(10)...
Add leading zeroes to number in Java? [duplicate]
...
(1) That's going to return 0num0num0num etc, instead of 00000num (2) Lots of string concatenations with "+" are a bad idea performance-wise. Better to preallocate a StringBuffer or StringBuilder of length 'digits'
– Nate Parsons
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How do I look inside a Python object?
...veniences, like tab completion, pretty printing of results, result history etc. that make it very handy for this sort of exploratory programming.
For more programmatic use of introspection, the basic builtins like dir(), vars(), getattr etc will be useful, but it is well worth your time to check ou...
String comparison in Python: is vs. == [duplicate]
...or all built-in Python objects (like
strings, lists, dicts, functions,
etc.), if x is y, then x==y is also
True.
Not always. NaN is a counterexample. But usually, identity (is) implies equality (==). The converse is not true: Two distinct objects can have the same value.
Also, is it g...