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Fast way of counting non-zero bits in positive integer
...nt() took about 1/20th of the time of bin(n).count("1"). So if you can install gmpy, use that.
To answer a question in the comments, for bytes I'd use a lookup table. You can generate it at runtime:
counts = bytes(bin(x).count("1") for x in range(256)) # py2: use bytearray
Or just define it lit...
Is there a better way to do optional function parameters in JavaScript? [duplicate]
... Well, you aren't talking about optional parameters - you really are passing a parameter, so this solution doesn't apply to your case. NaN doesn't mean "undefined" - it means you've passing a number but its value is NaN. See stackoverflow.com/questions/3215120/… for more
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Which Architecture patterns are used on Android? [closed]
I'm doing a small research of mobile platforms and I would like to know which design patterns are used in Android?
12 Answe...
Difference between jar and war in Java
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You add web components to a J2EE application in a package called a web application archive (WAR), which is a JAR similar to the package used for Java class libraries. A WAR usually contains other resources besides web components, including:
Server-side utility classes (database bean...
Add a CSS border on hover without moving the element [duplicate]
...ing when the thick border is applied. codepen
– aleph_one
Mar 18 at 18:36
add a comment
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What's the difference between TRUNCATE and DELETE in SQL
...nces highlighted below.
General Overview
If you want to quickly delete all of the rows from a table, and you're really sure that you want to do it, and you do not have foreign keys against the tables, then a TRUNCATE is probably going to be faster than a DELETE.
Various system-specific issues h...
Indenting #defines
I know that #define s, etc. are normally never indented. Why?
8 Answers
8
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Scala: Abstract types vs generics
... Sommers (May 18, 2009)
Update (October2009): what follows below has actually been illustrated in this new article by Bill Venners:
Abstract Type Members versus Generic Type Parameters in Scala (see summary at the end)
(Here is the relevant extract of the first interview, May 2009, emphasis min...
How to really read text file from classpath in Java
...me classloader, you should be able to use either of:
// From ClassLoader, all paths are "absolute" already - there's no context
// from which they could be relative. Therefore you don't need a leading slash.
InputStream in = this.getClass().getClassLoader()
.getResou...
How to use UTF-8 in resource properties with ResourceBundle
...UTF-8 saved properties file to an ISO-8859-1 saved properties file wherein all uncovered characters are converted into \uXXXX format. The below example converts a UTF-8 encoded properties file text_utf8.properties to a valid ISO-8859-1 encoded properties file text.properties.
native2ascii -encoding...