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How do I list all cron jobs for all users?
...from the
# beginning of each line.
function clean_cron_lines() {
while read line ; do
echo "${line}" |
egrep --invert-match '^($|\s*#|\s*[[:alnum:]_]+=)' |
sed --regexp-extended "s/\s+/ /g" |
sed --regexp-extended "s/^ //"
done;
}
# Given a stream...
How does HTTP file upload work?
... --, just like in the end of the last boundary string. The example above already includes this, but it can be easy to miss. See comment by @Andreas below.
Instead of URL encoding the form parameters, the form parameters (including the file data) are sent as sections in a multipart document in the b...
How to serve an image using nodejs
...else to get the job done" it should be noted, that using the http module already relies on someone else to get the job done. If someone doesn't want to rely on anyone to get the job done then at least raw TCP sockets should be used instead - which I do in one of my examples below.
A more serious pr...
Explain “claims-based authentication” to a 5-year-old
...
i read out this write up and it seems that claims-based authentication is 3rd party auth system like open auth or social log-ins such as Microsoft Account, Facebook, Twitter, Google. anyone can tell me how claims-based authenti...
Memcache(d) vs. Varnish for speeding up 3 tier web architecture
...s will result in an overhead and little benefit for modified pages.
Mostly read -- Varnish will probably cover most of it.
Similar read & write -- Varnish will serve a lot of the pages for you, Memcache will provide info for pages that have a mixture of known and new data allowing you to generat...
When to use thread pool in C#? [closed]
I have been trying to learn multi-threaded programming in C# and I am confused about when it is best to use a thread pool vs. create my own threads. One book recommends using a thread pool for small tasks only (whatever that means), but I can't seem to find any real guidelines. What are some consid...
How much faster is Redis than mongoDB?
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Rough results from the following benchmark: 2x write, 3x read.
Here's a simple benchmark in python you can adapt to your purposes, I was looking at how well each would perform simply setting/retrieving values:
#!/usr/bin/env python2.7
import sys, time
from pymongo import Connecti...
Find an element in a list of tuples
...
Read up on List Comprehensions
[ (x,y) for x, y in a if x == 1 ]
Also read up up generator functions and the yield statement.
def filter_value( someList, value ):
for x, y in someList:
if x == value :
...
Does using final for variables in Java improve garbage collection?
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It wouldn't be possible to assign null to an already created final object, then perhaps final instead of help, could make things harder
– Hernán Eche
Dec 14 '11 at 21:05
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How do I remove a MySQL database?
...ay notice from my last question that a problem caused some more problems, Reading MySQL manuals in MySQL monitor?
6 Answer...