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String formatting: % vs. .format vs. string literal
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The point is: The one recurring argument that the new syntax allows reordering of items is a moot point: You can do the same with the old syntax. Most people do not know that this is actually already defined in the Ansi C99 Std! Check out a re...
Completion handler for UINavigationController “pushViewController:animated”?
...gationController?.pushViewController(vc, animated: true) {
// Animation done
}
Objective-C
Header:
#import <UIKit/UIKit.h>
@interface UINavigationController (CompletionHandler)
- (void)completionhandler_pushViewController:(UIViewController *)viewController
...
How to reorder data.table columns (without copying)
... is made at all, other than temporary working memory, which is as large as one column.
so should be pretty efficient. See ?setcolorder for details.
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How can I export tables to Excel from a webpage [closed]
...e required, and most of all very EASY to understand. It's a win-win. The one thing it does have limits on, though, is strict formatting of columns.
If formatting and colors are absolute dealbreakers, the only 100% reliable, cross browser method I've found is to use a server-side language to proce...
Safe String to BigDecimal conversion
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String value = "1,000,000,000.999999999999999";
BigDecimal money = new BigDecimal(value.replaceAll(",", ""));
System.out.println(money);
Full code to prove that no NumberFormatException is thrown:
import java.math.BigDecimal;
public class Tester {
public static void main(Str...
Delete all local git branches
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The 'git branch -d' subcommand can delete more than one branch. So, simplifying @sblom's answer but adding a critical xargs:
git branch -D `git branch --merged | grep -v \* | xargs`
or, further simplified to:
git branch --merged | grep -v \* | xargs git branch -D
Impor...
WebRTC - scalable live stream broadcasting / multicasting
...y are stored in sessions that Janus makes very easy to use). Look here for one implementation of the incoming_rtp() function, a couple of lines below you can see how to transmit the packets to all attendees and here you can see the actual function to relay an rtp packet.
It all works pretty well, t...
Using socket.io in Express 4 and express-generator's /bin/www
...le different approach to initiate socket.io, it groups all related code in one place:
bin/www
/**
* Socket.io
*/
var socketApi = require('../socketApi');
var io = socketApi.io;
io.attach(server);
socketApi.js
var socket_io = require('socket.io');
var io = socket_io();
var socketApi = {};
soc...
What is the difference between static func and class func in Swift?
...dynamicType has now been replaced with type(of:x)
– Honey
Jan 16 '17 at 2:54
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What's the difference between :: (double colon) and -> (arrow) in PHP?
...func_instance() {
echo "in ", __METHOD__, "\n";
/* this is one exception where :: is required to access an
* instance member.
* The super implementation of func_instance is being
* accessed here */
parent::func_instance();
A::func_instance()...