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Is floating point math broken?
...is like this. In most programming languages, it is based on the IEEE 754 standard. The crux of the problem is that numbers are represented in this format as a whole number times a power of two; rational numbers (such as 0.1, which is 1/10) whose denominator is not a power of two cannot be exactly re...
Android emulator shows nothing except black screen and adb devices shows “device offline”
I am just trying to start development in Android.
So, the problem is that when I try to launch an emulator by issuing the command emulator @A2 , an emulator comes up on the screen. But even after waiting for as long as 2-3 hrs, all it shows is a black screen. Not even the android home screen or t...
How to iterate through two lists in parallel?
I have two iterables in Python, and I want to go over them in pairs:
8 Answers
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What's the simplest way to test whether a number is a power of 2 in C++?
...will want to check for it explicitly.
http://www.graphics.stanford.edu/~seander/bithacks.html has a large collection of clever bit-twiddling algorithms, including this one.
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Which terminal command to get just IP address and nothing else?
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It says that -i and -I are both illegal options
– Mason
Dec 16 '11 at 3:08
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How to select the first element with a specific attribute using XPath
...n 17 '09 at 10:48
Jonathan FinglandJonathan Fingland
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What's the “big idea” behind compojure routes?
I'm new to Clojure and have been using Compojure to write a basic web application. I'm hitting a wall with Compojure's defroutes syntax, though, and I think I need to understand both the "how" and the "why" behind it all.
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Limit file format when using ?
...I'd like to know if there is a solution. I'd like to keep solely to HTML and JavaScript; no Flash please.
11 Answers
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How to compare two floating point numbers in Bash?
...) )); then
…
fi
Explanation
Piping through the basic calculator command bc returns either 1 or 0.
The option -l is equivalent to --mathlib; it loads the standard math library.
Enclosing the whole expression between double parenthesis (( )) will translate these values to respectively true or...
Disable browser's back button
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Do not disable expected browser behaviour.
Make your pages handle the possibility of users going back a page or two; don't try to cripple their software.
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