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Difference between Inheritance and Composition
...ance is java.util.Stack, which currently extends java.util.Vector. This is now considered a blunder. A stack "is-NOT-a" vector; you should not be allowed to insert and remove elements arbitrarily. It should've been composition instead.
Unfortunately it's too late to rectify this design mistake, sin...
Generating a UUID in Postgres for Insert statement?
...y run. Then I had to run psql -d dbname -f SHAREDIR/contrib/module.sql and now it works!!! select uuid_generate_v1(); returns 1 now now. Thanks so much!
– anon58192932
Sep 29 '12 at 22:13
...
Determine if a String is an Integer in Java [duplicate]
... Scanner(s.trim());
if(!sc.hasNextInt(radix)) return false;
// we know it starts with a valid int, now make sure
// there's nothing left!
sc.nextInt(radix);
return !sc.hasNext();
}
If best practices don't matter to you, or you want to troll the guy who does your code reviews, t...
How can I get seconds since epoch in Javascript?
...
Re: arcane magic: Per these docs, Javascript knows how to convert a Date object to a Number. This means that you can type Number(new Date()) to get a number, or even +(new Date()), or use any Date instance in a numerical context such as new Date()/1000 and Javascript wi...
Xcode 4 - slow performance
...workspace file it helps speed it up.
First, make sure Xcode isn't open. Now find your project file. Right-click on it, and select Show Package Contents.
Next, delete project.xcworkspace.
Open Xcode and enjoy faster performance!
Thanks to:
http://meachware.blogspot.com/2011/06/speed-up-...
How to remove a TFS Workspace Mapping?
...ed in workspace {mypcname};domain\zhasan
– SearchForKnowledge
Aug 22 '14 at 13:48
5
I had a \4.0\...
How do you use “git --bare init” repository?
...
useful if you want to know difference between bare and non-bare repos stackoverflow.com/questions/7861184/…
– Guille Acosta
Mar 7 '16 at 14:52
...
Visual Studio : short cut Key : Duplicate Line
...fter)
Ctrl + D
In Visual Studio 2017 (pre v15.6)
(edit) This feature is now built-in in VS2017: Ctrl + E, V duplicates a line if nothing is selected, or duplicates selection. You can assign it to a different key combination, or find it in the menu:
See this reference for more information.
Pre...
How to check if an app is installed from a web-page on an iPhone?
...
As far as I know you can not, from a browser, check if an app is installed or not.
But you can try redirecting the phone to the app, and if nothing happens redirect the phone to a specified page, like this:
setTimeout(function () { wind...
How do I install from a local cache with pip?
... downloaded and added to the PIP_DOWNLOAD_CACHE directory. For instance, I now have quite a few Django packages.
This doesn't remove the need for network access, as stated in the pip news, so it's not the answer for creating new virtualenvs on the airplane, but it's still great.
...