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How would you make a comma-separated string from a list of strings?
What would be your preferred way to concatenate strings from a sequence such that between every two consecutive pairs a comma is added. That is, how do you map, for instance, ['a', 'b', 'c'] to 'a,b,c' ? (The cases ['s'] and [] should be mapped to 's' and '' , respectively.)
...
How to suppress GCC warnings from library headers?
...enerate lots of (repetitive) warnings. Is there a way to suppress warnings from library includes (i.e. #include ) or includes from certain paths? I'd like to use -Wall and/or -Wextra as usual on project code without relevant info being obscured. I currently use grep on make output but I'd like somet...
What's the difference between the 'ref' and 'out' keywords?
...
From MSDN: A ref parameter must be initialized before use, while an out parameter does not have to be explicitly initialized before being passed and any previous value is ignored.
– Shiva Kumar
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When and why should I use fragments in Android applications? [duplicate]
...self the following questions:
Is the lifecycle of the fragment different from the activity's lifecycle?
If the lifecycle is different, you get better handling of the lifecycle using a fragment. For example, if you want to destroy the fragment, but not the activity. Such is the case, when you hav...
CSS horizontal centering of a fixed div?
...at right for now, so full width */
top: 30px; /* Move it down from top of window */
width: 500px; /* Give it the desired width */
margin: auto; /* Center it */
max-width: 100%; /* Make it fit window if under 500px */
z-index: 10000; /* Whatever needed to...
How do I do a Date comparison in Javascript? [duplicate]
...on validateform()
{
if (trimAll(document.getElementById("<%=txtFromDate.ClientID %>").value) != "") {
if (!isDate(trimAll(document.getElementById("<%=txtFromDate.ClientID %>").value)))
msg = msg + "<li>Please enter valid From Date in mm/dd/yyyy format\n";
el...
Using Sinatra for larger projects via multiple files
...o get some ideas for how others are laying out their Sinatra applications. From that you can probably find one that suits your needs or simply make your own. It's not too hard to do. As you develop more Sinatra apps, you can add to your boilerplate.
Here's what I made and use for all of my projects...
What does T&& (double ampersand) mean in C++11?
...function
unique_ptr<int[]> ptr{new int[10]};
// first cast ptr from lvalue to rvalue
unique_ptr<int[]> new_owner = TakeOwnershipAndAlter(\
static_cast<unique_ptr<int[]>&&>(ptr), 10);
cout << "output:\n";
for(auto i = 0; i< 10; ++i) {
cou...
How do you use a variable in a regular expression?
...want hex numbers, you can do parseInt('' + myNumber, 16) to convert to hex from decimal.
– Eric Wendelin
Jun 21 '11 at 15:19
34
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How to install node.js as windows service?
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It also has system logging built in.
There is an API to create scripts from code, i.e.
var Service = require('node-windows').Service;
// Create a new service object
var svc = new Service({
name:'Hello World',
description: 'The nodejs.org example web server.',
script: 'C:\\path\\to\\hello...