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Check if a string has white space
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@CMS& @Bernard - Does not work [s.indexOf(' ') works]
– Shawn Rebelo
Jan 27 '15 at 18:12
add a commen...
JavaScript check if variable exists (is defined/initialized)
...: if the value is not defined and it's undefined
null: if it's null, for example, if a DOM element not exists...
empty string: ''
0: number zero
NaN: not a number
false
So it will cover off kind of all cases, but there are always weird cases which we'd like to cover as well, for example, a string...
Iterating through directories with Python
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Another way of returning all files in subdirectories is to use the pathlib module, introduced in Python 3.4, which provides an object oriented approach to handling filesystem paths (Pathlib is also available on Python 2.7 via the pathlib2 module on P...
How to open a file for both reading and writing?
...Note that the documentation for a states 'on some Unix systems, means that all writes append to the end of the file regardless of the current seek position'. In this case the f.seek(0) won't work as expected. I just fell foul of this on Linux.
– Graeme
Jun 25 '...
How to push different local Git branches to Heroku/master
Heroku has a policy of ignoring all branches but 'master'.
11 Answers
11
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New Array from Index Range Swift
...ements in the collection.
Therefore, as an alternative to the previous example, you can use the following code in order to create a new array from the first elements of another array:
let array = Array(10...14) // [10, 11, 12, 13, 14]
let arraySlice = array.prefix(3)
let newArray = Array(arraySli...
sql ORDER BY multiple values in specific order?
...I have a table with a indexed key and a non indexed field.
I need to find all records with a certain value and return the row.
I would like to know if I can order by multiple values.
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.NET / C# - Convert char[] to string
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Another alternative
char[] c = { 'R', 'o', 'c', 'k', '-', '&', '-', 'R', 'o', 'l', 'l' };
string s = String.Concat( c );
Debug.Assert( s.Equals( "Rock-&-Roll" ) );
share
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i...
How do I find the location of Python module sources?
...act it, the modules' code can be found in the Modules subdirectory.
For example, if you want to find the datetime code for python 2.6, you can look at
Python-2.6/Modules/datetimemodule.c
You can also find the latest Mercurial version on the web at
https://hg.python.org/cpython/file/tip/Modules/...
What does ** (double star/asterisk) and * (star/asterisk) do for parameters?
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The *args and **kwargs is a common idiom to allow arbitrary number of arguments to functions as described in the section more on defining functions in the Python documentation.
The *args will give you all function parameters as a tuple:
def foo(*args):
for a in a...