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Why should hash functions use a prime number modulus?
A long time ago, I bought a data structures book off the bargain table for $1.25. In it, the explanation for a hashing function said that it should ultimately mod by a prime number because of "the nature of math".
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Makefile variable as prerequisite
In a Makefile, a deploy recipe needs a environment variable ENV to be set to properly execute itself, whereas others don't care, e.g.:
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How dangerous is it to compare floating point values?
I know UIKit uses CGFloat because of the resolution independent coordinate system.
11 Answers
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SQL Server Operating system error 5: “5(Access is denied.)”
I am starting to learn SQL and I have a book that provides a database to work on. These files below are in the directory but the problem is that when I run the query, it gives me this error:
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UTF-8 byte[] to String
Let's suppose I have just used a BufferedInputStream to read the bytes of a UTF-8 encoded text file into a byte array. I know that I can use the following routine to convert the bytes to a string, but is there a more efficient/smarter way of doing this than just iterating through the bytes and con...
Why do we need virtual functions in C++?
I'm learning C++ and I'm just getting into virtual functions.
26 Answers
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Highlight the difference between two strings in PHP
What is the easiest way to highlight the difference between two strings in PHP?
13 Answers
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How To Launch Git Bash from DOS Command Line?
I've got what I'm hoping is a simple question, but I haven't been able to find the answer yet. I would like to launch Git Bash from a DOS batch file. Here is what I tried so far:
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.NET: Simplest way to send POST with data and read response
To my surprise, I can't do anything nearly as simple as this, from what I can tell, in the .NET BCL:
8 Answers
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How do I disable orientation change on Android?
I have an application that I just would like to use in portrait mode, so I have defined
android:screenOrientation="portrait" in the manifest XML. This works OK for the HTC Magic phone (and prevents orientation changes on other phones as well).
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