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What is polymorphism, what is it for, and how is it used?
...reach (Vehicle v in vehicles)
{
Console.WriteLine(
string.Format("A {0} has {1} wheels.",
v.GetType().Name, v.Wheels));
}
}
In this example, we create a list of the base class Vehicle, which does not know about how many wheels each of its sub-classes has...
Basic example of using .ajax() with JSONP?
...ment that looks like this after it loads the data:
<script>
{['some string 1', 'some data', 'whatever data']}
</script>
However this is a bit inconvenient, because we have to fetch this array from script tag. So JSONP creators decided that this will work better (and it is):
script = ...
How to measure time taken by a function to execute
...etween the two "console.time"
console.timeEnd('someFunction')
Note: The string being pass to the time() and timeEnd() methods must match(for the timer to finish as expected).
console.time() documentations:
NodeJS documentation regarding
MDN (client-side) documentation
...
How do I escape reserved words used as column names? MySQL/Create Table
...portability between different SQL servers you should use ANSI SQL queries. String escaping in ANSI SQL is done by using double quotes ("). Unfortunately, this escaping method is not portable to MySQL, unless it is set in ANSI compatibility mode.
Personally, I always start my MySQL server with the -...
how to use adb command to push a file on device without sd card
...ge/emulated/legacy/myVideoFile.mp4
For retrieve the path in the code:
String myFilePath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/myVideoFile.mp4";
This is all. This solution doesn't give permission problems and it works fine.
Last point: I wanted to change the video ...
How do I embed a single file from a GitHub gist with the new gist interface?
...
Take the gist URL from the left-hand side and after the .js add a query string like ?file=myFile.blah, e.g.
<script src="https://gist.github.com/4505639.js?file=macroBuild.scala" type="text/javascript"></script>
...
How to convert a selection to lowercase or uppercase in Sublime Text
I have several strings selected in a file in Sublime Text and I want to convert them all to lowercase.
5 Answers
...
Get nodes where child node contains an attribute
...e
import com.ximpleware.*;
public class test1 {
public static void main(String[] s) throws Exception{
VTDGen vg = new VTDGen();
if (vg.parseFile("c:/books.xml", true)){
VTDNav vn = vg.getNav();
AutoPilot ap = new AutoPilot(vn);
ap.selectXPath("//book[titl...
Amazon S3 direct file upload from client browser - private key disclosure
...orary cred
Once you have the cred, create a bucket policy (base 64 encoded string). Then sign the bucket policy with the temporary secret access key to generate final signature
send the necessary parameters back to the UI
Once this is received, create a html form object, set the required params and ...
How to solve privileges issues when restore PostgreSQL Database
...ET lock_timeout = 0;
SET client_encoding = 'UTF8';
SET standard_conforming_strings = on;
SELECT pg_catalog.set_config('search_path', '', false);
SET check_function_bodies = false;
SET client_min_messages = warning;
SET row_security = off;
--
-- Name: EXTENSION plpgsql; Type: COMMENT; Schema: -; Own...