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How to generate random SHA1 hash to use as ID in node.js?
... unique value in all but the most insane parallel computing situations. I know its silly and randomBytes(20) is going to be unique, but its just a confidence we can have because we may not be familiar with internals of random generation of another library.
– Dmitri R117
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How can I add the new “Floating Action Button” between two widgets/layouts
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Now it is part of official Design Support Library.
In your gradle:
compile 'com.android.support:design:22.2.0'
http://developer.android.com/reference/android/support/design/widget/FloatingActionButton.html
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How to check if PHP array is associative or sequential?
...).
If the value is a non-empty array, exactly 1 function returns true.
Now, for an array to be a "genuine" array that we are all accustomed to, meaning:
Its keys are all numeric / integers.
Its keys are sequential (i.e. increasing by step 1).
Its keys start from zero.
We can check with the f...
Getting visitors country from their IP
I want to get visitors country via their IP... Right now I'm using this ( http://api.hostip.info/country.php?ip= ...... )
2...
Defining a variable with or without export
...$ ALICE="Alice"; export BOB="Bob"; env | grep "ALICE\|BOB"
BOB=Bob
So, now it should be as clear as is the summer's sun! Thanks to Brain Agnew, alexp, and William Prusell.
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How are software license keys generated?
...ng as "0,-500;100,-300;200,-100;100,600"
We'll encrypt the string with a known and fixed key (horribly weak, but it serves a purpose), then convert the resulting bytes through Base32 to generate the final key
The application can then reverse this process (base32 to real number, decrypt, decode the...
How to add footnotes to GitHub-flavoured Markdown?
..., e.g. <sup>1</sup>.
¹Of course this isn't ideal, as you are now responsible for maintaining the numbering of your footnotes. It works reasonably well if you only have one or two, though.
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Releasing memory in Python
...ere a way to force Python to release all the memory that was used (if you know you won't be using that much memory again)?
No, there is not. But there is an easy workaround: child processes.
If you need 500MB of temporary storage for 5 minutes, but after that you need to run for another 2 hours a...
Mixin vs inheritance
...med "ColorAndDimension", which adds a color property and width and height.
Now, you could add ColorAndDimension to a, say, Shape class, a Sprite class, a Car class, etc. And they will all have the same interface (say get/setColor, get/setHeight/Width, etc.)
So, in the generic case a mixin IS inherit...
Where should I put tags in HTML markup?
...).textContent = "Welcome back, Bart";
});
Because your browser does not know my-script.js isn't going to modify the document until it has been downloaded & executed, the parser stops parsing.
Antiquated recommendation
The old approach to solving this problem was to put <script> tags at...