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Is recursion ever faster than looping?
...n some environments these functions are the first (or only) to get a boost from automatic parallelization — so they can be significantly faster than either iteration or recursion. Data Parallel Haskell is an example of such an environment.
List comprehensions are another alternative, but these ...
Matlab: Running an m-file from command-line
...
Here is what I would use instead, to gracefully handle errors from the script:
"C:\<a long path here>\matlab.exe" -nodisplay -nosplash -nodesktop -r "try, run('C:\<a long path here>\mfile.m'), catch, exit, end, exit"
If you want more verbosity:
"C:\<a long path here&g...
Setting up maven dependency for SQL Server
...
Download the driver JAR from the link provided by Olaf and add it to your local Maven repository with;
mvn install:install-file -Dfile=sqljdbc4.jar -DgroupId=com.microsoft.sqlserver -DartifactId=sqljdbc4 -Dversion=4.0 -Dpackaging=jar
Then add it t...
What's the advantage of Logic-less template (such as mustache)?
...
In other words, it prevents you from shooting yourself in the foot. In the old JSP days, it was very common to have JSP files sprinkled with Java code, which made refactoring much harder, since you had your code scattered.
If you prevent logic in templates...
What is NODE_ENV and how to use it in Express?
...y set NODE_ENV for your environment, it will be undefined if you access it from process.env, there is no default.
Setting NODE_ENV
How to actually set the environment variable varies from operating system to operating system, and also depends on your user setup.
If you want to set the environment va...
Why do some websites add “Slugs” to the end of URLs? [closed]
...iendly is 'discover-ability', meaning you can take a guess at url's simply from the address bar. i.love.pets.com/search/cats+dogs could easily lead to i.love.pets.com/search/pug+puppies etc
– Xian
Sep 6 '08 at 13:51
...
“ImportError: No module named” when trying to run Python script
..., but also on your current working directory. When starting an interpreter from the command line, the current directory you're operating in is the same one you started ipython in. If you run
import os
os.getcwd()
you'll see this is true.
However, let's say you're using an ipython notebook, run ...
How do I efficiently iterate over each entry in a Java Map?
...p.entrySet()) {
i += pair.getKey() + pair.getValue();
}
Using forEach from Java 8
final long[] i = {0};
map.forEach((k, v) -> i[0] += k + v);
Using keySet and foreach
long i = 0;
for (Integer key : map.keySet()) {
i += key + map.get(key);
}
Using keySet and iterator
long i = 0;
Iter...
Must Dependency Injection come at the expense of Encapsulation?
...ly we're using an OO language as the 'host', but the ideas behind IoC come from component-oriented software engineering, not OO.
Component software is all about managing dependencies - an example in common use is .NET's Assembly mechanism. Each assembly publishes the list of assemblies that it refe...
What is the difference between ng-if and ng-show/ng-hide
...on assigned to ngIf evaluates to a false value then the element is removed from the DOM, otherwise a clone of the element is reinserted into the DOM.
<!-- when $scope.myValue is truthy (element is restored) -->
<div ng-if="1"></div>
<!-- when $scope.myValue is falsy (element i...