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Why prefer two's complement over sign-and-magnitude for signed numbers?
..., 2 and -1. In your "intuitive" way of representing numbers, they would be 0010 and 1001, respectively (I'm sticking to 4 bits for size). In the two's complement way, they are 0010 and 1111. Now, let's say I want to add them.
Two's complement addition is very simple. You add numbers normally and an...
How to get all child inputs of a div element (jQuery)
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308
Use it without the greater than:
$("#panel :input");
The > means only direct children of ...
Inherit from a generic base class, apply a constraint, and implement an interface in C#
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answered Jan 5 '10 at 16:30
Adam RobinsonAdam Robinson
166k3131 gold badges264264 silver badges327327 bronze badges
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How to extract the first two characters of a string in shell scripting?
...er expansion:
pax> long="USCAGol.blah.blah.blah"
pax> short="${long:0:2}" ; echo "${short}"
US
This will set short to be the first two characters of long. If long is shorter than two characters, short will be identical to it.
This in-shell method is usually better if you're going to be doi...
How to erase the file contents of text file in Python?
...if you have already an opened file:
f = open('file.txt', 'r+')
f.truncate(0) # need '0' when using r+
In C++, you could use something similar.
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Remove/Add Line Breaks after Specific String using Sublime Text
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edited Oct 26 '12 at 17:20
answered Oct 25 '12 at 20:25
Sa...
correct way to use super (argument passing)
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107
Sometimes two classes may have some parameter names in common. In that case, you can't pop the ...
How to Create a circular progressbar in Android which rotates on it?
...le file (@drawable folder): circular_progress_bar.xml
<?xml version="1.0" encoding="utf-8"?>
<rotate xmlns:android="http://schemas.android.com/apk/res/android"
android:fromDegrees="270"
android:toDegrees="270">
<shape
android:innerRadiusRatio="2.5"
android...
Is there an XSLT name-of element?
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edited Feb 25 '09 at 9:22
Robert Gould
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What is offsetHeight, clientHeight, scrollHeight?
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edited Apr 26 '16 at 20:25
answered Mar 26 '14 at 23:55
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