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Asynchronous method call in Python?
...ss pool must be created inside __main__.
async.pool = Pool(4)
p = range(0, 1000)
results = []
for i in range(4):
result = printsum(i, sample(p, 100))
results.append(result)
for result in results:
print("Worker %i: sum value is %i" % result.get())
In a ...
Rails: Using greater than/less than with a where statement
...
I've only tested this in Rails 4 but there's an interesting way to use a range with a where hash to get this behavior.
User.where(id: 201..Float::INFINITY)
will generate the SQL
SELECT `users`.* FROM `users` WHERE (`users`.`id` >= 201)
The same can be done for less than with -Float::INFI...
How to highlight text using javascript
...ext.anchorOffset;
var end = text.focusOffset - text.anchorOffset;
range = window.getSelection().getRangeAt(0);
var selectionContents = range.extractContents();
var span = document.createElement("span");
span.appendChild(selectionContents);
span.style.backgroundColor = "ye...
What would cause an algorithm to have O(log log n) complexity?
...e. A vEB-tree is a specialized data structure for storing integers in the range 0 ... N - 1. It works as follows: the root node of the tree has √N pointers in it, splitting the range 0 ... N - 1 into √N buckets each holding a range of roughly √N integers. These buckets are then each interna...
How to read the RGB value of a given pixel in Python?
...')
width = photo.size[0] #define W and H
height = photo.size[1]
for y in range(0, height): #each pixel has coordinates
row = ""
for x in range(0, width):
RGB = photo.getpixel((x,y))
R,G,B = RGB #now you can use the RGB value
...
Cast Double to Integer in Java
... What happens when the double value is outside of the integer range? (like 2^33)
– nikdeapen
Oct 3 '14 at 1:52
5
...
Remove the last line from a file in Bash
...e $ means "the last line in the file". When specifying a location (called "range" in sed lingo) before a command, that command is only applied to the specified location. So, this command explicitly says "in the range of the last line in a file, delete it". Quite slick and straight to the point, if y...
How can I send an HTTP POST request to a server from Excel using VBA?
...nnection:="URL;http://carbon.brighterplanet.com/flights.txt", Destination:=Range("A2"))
.PostText = "origin_airport=MSN&destination_airport=ORD"
.RefreshStyle = xlOverwriteCells
.SaveData = True
.Refresh
End With
Notes:
Regarding output... I don't know if it's possible to ret...
PostgreSQL LIKE query performance variations
...card at the beginning of the match string so the executor can use an index range scan. (the relevant comment in the docs is here) Lower and ilike will also lose your ability to use the index unless you specifically create an index for that purpose (see functional indexes).
If you want to search for...
How can I convert spaces to tabs in Vim or Linux?
... 'expandtab' is reset (:verbose set ts? et? is your friend). retab takes a range, so I usually specify % to mean "the whole file".
:set tabstop=2 " To match the sample file
:set noexpandtab " Use tabs, not spaces
:%retab! " Retabulate the whole file
Before doing anything like t...