sudo -s <<EOF
a='var'
echo 'Running serveral commands with sudo'
mktemp -d
echo "\$a"
EOF
$a needs to be escaped to prevent it to be expanded by the current shell
Or
sudo -s <<'EOF'
a='var'
echo 'Running serveral commands with sudo'
mktemp -d
e...
The revert command allows discarding unwanted uncommitted changes.
Reverting changes to a single file.
hg revert example.c
Reverting all changes.
This will discard all changes not just the current directory.
hg revert --all
hg will output which files were reverted.
reverting exa...
This example adds a new rectangle to the canvas every 1 second (== a 1 second interval)
Annotated Code:
<!doctype html>
<html>
<head>
<style>
body{ background-color:white; }
#canvas{border:1px solid red; }
</style>
<script>
window.onload=(functio...
During mousemove you get flooded with 30 mouse events per second. You might not be able to redraw your drawings at 30 times per second. Even if you can, you're probably wasting computing power by drawing when the browser is not ready to draw (wasted == across display refresh cycles).
Therefore it m...
The even? method can be used to determine if a number is even
4.even? # => true
5.even? # => false
The odd? method can be used to determine if a number is odd
4.odd? # => false
5.odd? # => true
// Supposing SCHAR_MAX, the maximum value that can be represented by a signed char, is
// 127, the behavior of this assignment is implementation-defined:
signed char integer;
integer = 128;
Once a CMake project is initialized via project(), the output verbosity of the resulting build script can be adjusted via:
CMAKE_VERBOSE_MAKEFILE
This variable can be set via CMake's command line when configuring a project:
cmake -DCMAKE_VERBOSE_MAKEFILE=ON <PATH_TO_PROJECT_ROOT>
For G...
The axis offsets for drawing the marker that are specified by refX and refY are applied before the rotation specified by the orient parameter. Below you can see the effects of various combinations of orient and refX, refY to illustrate this.
<svg width="800px" height="600px"&...
The default for drawing markers is to use the stroke width of the calling element, but you can explicitly specify that markers be drawn using the unit system for the element the marker is being applied to by specifying markerUnits="userSpaceOnUse". Markers are drawn into a 3x3 markerUnits ...
ODS (on-disk structure) version is a number representing version of the database low-level data layout structure (ODS). When a new feature is added to Firebird it might or might not require the structure of database pages or system tables (database metadata) to change. If it does, the ODS version mu...
.default-settings() {
padding: 4px;
margin: 4px;
font-size: 16px;
border: 1px solid gray;
}
#demo {
.default-settings;
}
The above example when compiled would only produce the following output. The .default-settings() mixin definition would not be output in the compiled CSS fi...
First let's create an ExchangeManager object, where the constructor will connect to the services for us. It also has a GetOofSettings method, which will return the OofSettings object for the specified email address :
using System;
using System.Web.Configuration;
using Microsoft.Exchange.WebServic...
Vaadin plug-in for eclipse provides a quick way to build vaadin project with Apache Ivy dependency manager. Vaadin's documentation explains how to create vaadin project with the help of Eclipse plugin.
To install the plug-in just go to eclipse marketplace and search vaadin. Current version of the p...
The value of an entry widget can be obtained with the get method of the widget:
name_entry = tk.Entry(parent)
...
name = name_entry.get()
Optionally, you may associate an instance of a StringVar, and retrieve the value from the StringVar rather than from the widget:
name_var = tk.StringVar()
...
Mouse movement:
import java.awt.Robot;
public class MouseClass {
public static void main(String[] args) throws Exception {
Robot robot = new Robot();
// SET THE MOUSE X Y POSITION
robot.mouseMove(300, 550);
}
}
Press left/right button of mouse:
import java.awt....
The reverse() method does what the name says it will do - reverses the array. Here is an example :
my_array = array('i', [1,2,3,4,5])
my_array.reverse()
# array('i', [5, 4, 3, 2, 1])
If you are using library that contains (for example) AwesomeViewController with a wrong status bar color you can try this:
let awesomeViewController = AwesomeViewController()
awesomeViewController.navigationBar.barStyle = .blackTranslucent // or other style
