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What do (lambda) function closures capture?
... Python and I came around something peculiar in the way closures work. Consider the following code:
6 Answers
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Haskell testing workflow
...hmarks right is mostly about picking the right tools.
test-framework provides a one-stop shop to run all your HUnit test-cases and QuickCheck properties all from one harness.
Code coverage is built into GHC in the form of the HPC tool.
Criterion provides some pretty great benchmarking machinery
...
Resolve Type from Class Name in a Different Assembly
...tType("MyProject.Domain.Model." + myClassName + ", AssemblyName");
To avoid ambiguity or if the assembly is located in the GAC, you should provide a fully qualified assembly name like such:
Type.GetType("System.String, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089");...
How to play with Control.Monad.Writer in haskell?
...eclare a monad instance for this, and then write the function
tell :: Monoid w => w -> Writer w ()
which simply logs its input. Now suppose you want a monad that has logging capabilities, but also does something else - say it can read from an environment too. You'd implement this as
type R...
Assign pandas dataframe column dtypes
...he entire field is converted to float64
– Michael David Watson
May 5 '15 at 20:13
18
I noticed co...
List all of the possible goals in Maven 2?
... lifecycles which are different) is composed of the following phases:
validate: validate the project is correct and all necessary information is available.
compile: compile the source code of the project.
test: test the compiled source code using a suitable unit testing framework. These tests shou...
Custom error pages on asp.net MVC3
... }
public ActionResult Http403()
{
return Content("Forbidden", "text/plain");
}
}
and then I subscribe for the Application_Error in Global.asax and invoke this controller:
protected void Application_Error()
{
var exception = Server.GetLastError();
var httpException...
Perl flags -pe, -pi, -p, -w, -d, -i, -t?
...
-n: Places a non-printing loop around your command.
-e: Allows you to provide the program as an argument rather
than in a file. You don't want to have to create a script
file for every little Perl one-liner.
-i: Modifies your input file in-place (making a backup of the
original). Handy ...
load scripts asynchronously
I am using several plugins, custom widgets and some other libraries from JQuery. as a result I have several .js and .css files. I need to create a loader for my site because it takes some time to load. it will be nice if I can display the loader before importing all the:
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Android Preferences: How to load the default values when the user hasn't used the preferences-screen
...od has never been called in the past so you don't need to worry about overriding the user's settings each time your Activity is created
Take a look into PreferenceManager.setDefaultValues in Android API for further investigation.
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