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How do I create a URL shortener?
... your system. Something simple like f(checksum(id) % (62^2)) + f(id) = url_id
– koblas
Sep 4 '10 at 13:53
6
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When should I use @classmethod and when def method(self)?
While integrating a Django app I have not used before, I found two different ways used to define functions in classes. The author seems to use them both very intentionally. The first one is one I myself use a lot:
...
What does “%” (percent) do in PowerShell?
...at the % operation starts script blocks after the pipeline, although about_Script_Blocks indicates the % isn't necessary.
...
Formatting code snippets for blogging on Blogger [closed]
...code" class="brush: erlang"><![CDATA[
-module(trim).
-export([string_strip_right/1, reverse_tl_reverse/1, bench/0]).
bench() -> [nbench(N) || N <- [1,1000,1000000]].
nbench(N) -> {N, bench(["a" || _ <- lists:seq(1,N)])}.
bench(String) ->
{{string_strip_right,
lists:s...
How to reuse an ostringstream?
...lear out and reuse an ostringstream (and the underlying buffer) so that my app doesn't have to do as many allocations. How do I reset the object to its initial state?
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How to merge two arrays in JavaScript and de-duplicate items
...
With Underscore.js or Lo-Dash you can do:
console.log(_.union([1, 2, 3], [101, 2, 1, 10], [2, 1]));
<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.15/lodash.min.js"></script>
http://underscorejs.org/#union
http://lodash.com/docs#union
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Uploading base64 encoded Image to Amazon S3 via Node.js
...actually CoffeeScript, but CoffeeScript is just JavaScript so lets say JS) app.
4 Answers
...
Scrollview vertical and horizontal in android
...the ScrollableImageActivity:
package com.scrollable.view;
import android.app.Activity;
import android.os.Bundle;
import android.view.MotionEvent;
import android.widget.HorizontalScrollView;
import android.widget.ScrollView;
public class ScrollableImageActivity extends Activity {
private floa...
How to update Ruby to 1.9.x on Mac?
...n turn forces you to install Xcode (if you haven't already) https://itunes.apple.com/us/app/xcode/id497799835 AND/OR install the GCC package from: https://github.com/kennethreitz/osx-gcc-installer to avoid errors running "make".
Edit: As of Mavericks you can choose to install only the Xcode command...
Setting Objects to Null/Nothing after use in .NET
...e sure you call IDisposable.Dispose() when you're done with that object (wrapped in a try..finally, or, a using() block). But even if you don't remember to call Dispose(), the finaliser method on the object should be calling Dispose() for you.
I thought this was a good treatment:
Digging into I...