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Check if character is number?
...I think it's very fun to come up with ways to solve this. Below are some.
(All functions below assume argument is a single character. Change to n[0] to enforce it)
Method 1:
function isCharDigit(n){
return !!n.trim() && n > -1;
}
Method 2:
function isCharDigit(n){
return !!n.trim...
How to change progress bar's progress color in Android
... The reason is because I'm creating the progress bar dynamically, and setting its color upon user request. Since I usually use code for building my GUI screen and components, I'm not familiar with the attached XML and I don't know what's a layer-list (although I'm guessing that you ar...
Convert List into Comma-Separated String
..., 4, 5 })
String.Join will take a list as a the second parameter and join all of the elements using the string passed as the first parameter into one single string.
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Deep null checking, is there a better way?
...'d say
cake?.frosting?.berries?.loader
and the compiler would generate all the short-circuiting checks for you.
It didn't make the bar for C# 4. Perhaps for a hypothetical future version of the language.
Update (2014):
The ?. operator is now planned for the next Roslyn compiler release. Note ...
Identifying and removing null characters in UNIX
...l with I/O redirection (<, >, …) anywhere in the command line, actually.
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How to make a function wait until a callback has been called using node.js
...orking with event driven systems like node, your function should accept a callback parameter that will be invoked when then computation is complete. The caller should not wait for the value to be "returned" in the normal sense, but rather send the routine that will handle the resulting value:
funct...
Python recursive folder read
...Path = os.path.join(root, file). BTW "file" is a builtin, so you don't normally use it as variable name.
Another problem are your loops, which should be like this, for example:
import os
import sys
walk_dir = sys.argv[1]
print('walk_dir = ' + walk_dir)
# If your current working directory may ch...
HTML inside Twitter Bootstrap popover
...belongs to <a href="#" that's why it wasn't working, change it and it's all good.
Here is working JSFiddle which shows you how to create bootstrap popover.
Relevant parts of the code is below:
HTML:
<!--
Note: Popover content is read from "data-content" and "title" tags.
-->
<a tabindex...
Filter by process/PID in Wireshark
...
I don't see how. The PID doesn't make it onto the wire (generally speaking), plus Wireshark allows you to look at what's on the wire - potentially all machines which are communicating over the wire. Process IDs aren't unique across different machines, anyway.
...
Which Eclipse files belong under version control?
...ect-dir/.classpath
project-dir/.settings/*
should be in your SCM (especially .project and .classpath according to the Eclipse documentation).
The goal is that anyone can checkout/update his/her SCM workspace and import the Eclipse project into the Eclipse workspace.
For that, you want to use on...