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How to read a large file - line by line?
... efficient ways in ranked order (first is best) -
use of with - supported from python 2.5 and above
use of yield if you really want to have control over how much to read
1. use of with
with is the nice and efficient pythonic way to read large files. advantages - 1) file object is automatically clo...
Can I get Memcached running on a Windows (x64) 64bit environment?
... so people know, the 32-bit and 64-bit version as build by the good people from membase/couchbase/whatever is still available the blog URL has changed though:
32-bit binary of memcached 1.4.4 as Windows-service:
http://blog.couchbase.com/memcached-144-windows-32-bit-binary-now-available
http://s3...
What is the use of the ArraySegment class?
...s Program
{
static void Main()
{
// Create an ArraySegment from this array.
int[] array = { 10, 20, 30 };
ArraySegment<int> segment = new ArraySegment<int>(array, 1, 2);
// Write the array.
Console.WriteLine("-- Array --");
int[] o...
How to find serial number of Android device?
...VICE);
String uid = tManager.getDeviceId();
getSystemService is a method from the Activity class. getDeviceID() will return the MDN or MEID of the device depending on which radio the phone uses (GSM or CDMA).
Each device MUST return a unique value here (assuming it's a phone). This should wor...
Reference: mod_rewrite, URL rewriting and “pretty links” explained
...mple request of a browser to a web server requesting the URL /foo/bar.html from it. It is important to stress that it does not request a file, it requests just some arbitrary URL. The request may also look like this:
GET /foo/bar?baz=42 HTTP/1.1
This is just as valid a request for a URL, and it h...
Understanding __get__ and __set__ and Python descriptors
... that great).
A descriptor is defined on a class, but is typically called from an instance. When it's called from an instance both instance and owner are set (and you can work out owner from instance so it seems kinda pointless). But when called from a class, only owner is set – which is why it's...
Define css class in django Forms
...can create a custom filter "addcss" in "my_app/templatetags/myfilters.py"
from django import template
register = template.Library()
@register.filter(name='addcss')
def addcss(value, arg):
css_classes = value.field.widget.attrs.get('class', '').split(' ')
if css_classes and arg not in css_...
Sort a text file by line length including spaces
... " -f2-
In both cases, we have solved your stated problem by moving away from awk for your final cut.
Lines of matching length - what to do in the case of a tie:
The question did not specify whether or not further sorting was wanted for lines of matching length. I've assumed that this is unwant...
How to run Rake tasks from within Rake tasks?
...you'd rather stick to rake's idioms, here are your possibilities, compiled from past answers:
This always executes the task, but it doesn't execute its dependencies:
Rake::Task["build"].execute
This one executes the dependencies, but it only executes the task if
it has not already been invoked:...
How to read data when some numbers contain commas as thousand separator?
..."num.with.commas")
setAs("character", "num.with.commas",
function(from) as.numeric(gsub(",", "", from) ) )
Then run read.csv like:
DF <- read.csv('your.file.here',
colClasses=c('num.with.commas','factor','character','numeric','num.with.commas'))
...