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How do I undo 'git add' before commit?
...ex (aka staging area) contains all the files, not just changed files. It "starts life" (when you check out a commit or clone a repo) as a copy of all the files in the commit pointed to by HEAD. So if you remove a file from the index (git rm --cached) it means you are preparing to make a commit tha...
Get day of week in SQL Server 2005/2008
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anyone glancing over this - note that the default start of week is sunday. Look at @Sung's answer for how to change that safely
– JonnyRaa
Mar 31 '14 at 9:55
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How to echo with different colors in the Windows command line
...upport to your Windows command console.
Windows 10 - Command Line Colors
Starting from Windows 10 the Windows console support ANSI Escape Sequences and some colors by default. The feature shipped with the Threshold 2 Update in Nov 2015.
MSDN Documentation
Update (05-2019): The ColorTool enables ...
Best way to select random rows PostgreSQL
...e or the recursion may run dry before the limit is reached - or we have to start with a large enough buffer which defies the purpose of optimizing performance.
Duplicates are eliminated by the UNION in the rCTE.
The outer LIMIT makes the CTE stop as soon as we have enough rows.
This query is care...
Math - mapping numbers
...de to get the ratio between the sizes of the two ranges, then subtract the starting value of your inital range, multiply by the ratio and add the starting value of your second range. In other words,
R = (20 - 10) / (6 - 2)
y = (x - 2) * R + 10
This evenly spreads the numbers from the first range ...
How to create a Menubar application for Mac
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I've found Codebox's Popup to be a great starting point. It is ripe for forking on Github.
Though it works nicely, they do note on their site...
P. S. In Lion, Apple is adding a new class for popovers like in iOS.
So, after OS X 10.7 is released, you would...
bool operator ++ and --
... before this is an issue. With -- though it will only result in false if I started with a value of 1 for true, or started with 0 and used ++ precisely once before.
This is different if we start with a value that is just a few below 0. Indeed, in such a case we might want ++ to result in the false va...
Relational table naming convention [closed]
I'm starting a new project and would like to get my table- and column names right from the start. For example I've always used plural in table names but recently learned singular is correct.
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time.sleep — sleeps thread or process?
...3):
print x
time.sleep(5)
def run():
worker().start()
waiter().start()
Which will print:
>>> thread_test.run()
0
100
>>> 1
2
3
4
5
101
6
7
8
9
10
102
share
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What is the equivalent to a JavaScript setInterval/setTimeout in Android/Java?
...n("Seconds passed: " + mSecondsPassed);
}
};
private void start() {
mTimer.scheduleAtFixedRate(mTask, 1000, 1000);
}
public static void main(String[] args) {
Clock c = new Clock();
c.start();
}
}
...