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What is a dependency property?
...
The only explanation I found helpful and well written is this one: http://www.wpftutorial.net/dependencyproperties.html
Basically, DependencyProperties differ from regular properties in that they're not just setters / getters for fields in the class, but they retrieve their actual values dy...
What's the difference between fill_parent and wrap_content?
...t;?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
andro...
PostgreSQL delete all content
...WHERE clause is absent, the effect is to delete all rows
in the table.
http://www.postgresql.org/docs/9.3/static/sql-delete.html
TRUNCATE is a PostgreSQL extension that provides a faster mechanism to
remove all rows from a table. TRUNCATE quickly removes all rows from a
set of tables. I...
How can I avoid Java code in JSP files, using JSP 2?
...ponse, FilterChain chain) throws ServletException, IOException {
if (((HttpServletRequest) request).getSession().getAttribute("user") == null) {
((HttpServletResponse) response).sendRedirect("login"); // Not logged in, redirect to login page.
} else {
chain.doFilter(request, ...
How to get first and last day of previous month (with timestamp) in SQL Server
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Bash script plugin for Eclipse? [closed]
...p. Install via the eclipse standard update site within your eclipse (e. g. http://download.eclipse.org/releases/neon/) Then look for Programming languages and Dynamic Languages Toolkit - ShellEd.
– Torsten
Aug 5 '16 at 16:06
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socket.emit() vs. socket.send()
...ta) {
console.log(data);
});
});
client:
var socket = io.connect('http://localhost');
socket.on('news', function (data) {
console.log(data);
socket.emit('my other event', { my: 'data' });
});
Socket.send does the same, but you don't register to 'news' but to message:
server:
var io ...
Drawing an SVG file on a HTML5 canvas
...ge();
img.onload = function() {
ctx.drawImage(img, 0, 0);
}
img.src = "http://upload.wikimedia.org/wikipedia/commons/d/d2/Svg_example_square.svg";
Live example here. You should see a green square in the canvas. The second green square on the page is the same <svg> element inserted into th...
How can I pretty-print JSON in a shell script?
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if the JSON is from an internet source such as an API, you can use
curl http://my_url/ | python -m json.tool
For convenience in all of these cases you can make an alias:
alias prettyjson='python -m json.tool'
For even more convenience with a bit more typing to get it ready:
prettyjson_s()...
Detect when an image fails to load in Javascript
...on imageNotFound() {
alert('That image was not found.');
}
testImage("http://foo.com/bar.jpg");
And my sympathies for the jQuery-resistant boss!
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