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When is memoization automatic in GHC Haskell?
...new version is much less efficient because it will have to read about 1 GB from memory where y is stored, while the original version would run in constant space and fit in the processor's cache. In fact, under GHC 6.12.1, the function f is almost twice as fast when compiled without optimizations th...
How to run a command before a Bash script exits?
...
From the bash manpage (concerning builtins):
trap [-lp] [[arg] sigspec ...]
The command arg is to be read and executed when the shell
receives signal(s) sigspec.
So, as indicated ...
Displaying the Indian currency symbol on a website
...ss="WebRupee">Rs.</span> 200
This means if somebody copies text from your site and pastes it somewhere else, he will see Rs and not some other or blank character.
You can now also use the new Rupee unicode symbol — U+20B9 INDIAN RUPEE SIGN. It can be used in this manner:
<span clas...
Sprintf equivalent in Java
... stream:
PrintStream ps = new PrintStream(baos);
ps.printf("there is a %s from %d %s", "hello", 3, "friends");
System.out.println(baos.toString());
baos.reset(); //need reset to write new string
ps.printf("there is a %s from %d %s", "flip", 5, "haters");
System.out.println(baos.toString());
baos.re...
How do I discover memory usage of my application in Android?
...of little use, since the Java heap limit is there in part to avoid one app from being able to stress the system to this point.
Going lower-level, you can use the Debug API to get raw kernel-level information about memory usage: android.os.Debug.MemoryInfo
Note starting with 2.0 there is also an AP...
adding directory to sys.path /PYTHONPATH
I am trying to import a module from a particular directory.
5 Answers
5
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How do I check which version of NumPy I'm using?
...
From the command line, you can simply issue:
python -c "import numpy; print(numpy.version.version)"
Or:
python -c "import numpy; print(numpy.__version__)"
...
moment.js 24h format
...
Use this to get time from 00:00:00 to 23:59:59
If your time is having date from it by using 'LT or LTS'
var now = moment('23:59:59','HHmmss').format("HH:mm:ss")
** https://jsfiddle.net/a7qLhsgz/**
...
What is the usefulness of PUT and DELETE HTTP request methods?
... that the operation has been carried out, even if the status code returned from the origin server indicates that the action has been completed successfully …
PUT is for putting or updating a resource on the server:
The PUT method requests that the enclosed entity be stored under the supplied...
Transform DateTime into simple Date in Ruby on Rails
...rror: undefined method 'to_date' for #<DateTime: -1/2,0,2299161>
from (irb):1
>> require 'active_support/core_ext'
=> true
>> DateTime.new.to_date
=> Mon, 01 Jan -4712
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