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Efficient way to rotate a list in python
...ng and pushing on both ends. They even have a dedicated rotate() method.
from collections import deque
items = deque([1, 2])
items.append(3) # deque == [1, 2, 3]
items.rotate(1) # The deque is now: [3, 1, 2]
items.rotate(-1) # Returns deque to original state: [1, 2, 3]
item = i...
Ruby on Rails and Rake problems: uninitialized constant Rake::DSL
...
A tweet from DHH earlier. Rake .9.0 breaks Rails and several other things, you need to:
gem "rake", "0.8.7"
in your Gemfile.
share
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Hadoop “Unable to load native-hadoop library for your platform” warning
...
The answer depends... I just installed Hadoop 2.6 from tarball on 64-bit CentOS 6.6. The Hadoop install did indeed come with a prebuilt 64-bit native library. For my install, it is here:
/opt/hadoop/lib/native/libhadoop.so.1.0.0
And I know it is 64-bit:
[hadoop@VMWHADTES...
Python loop that also accesses previous and next values
...lement, and end iterating at the last-but-one element. So index should run from 1 ... (l-1), not 0 ... l as you have here, and no need for the special-cased if-clauses. Btw, there is a parameter enumerate(..., start=1) but not for end. So we don't realy want to use enumerate().
...
How to identify platform/compiler from preprocessor macros?
...tackoverflow.com%2fquestions%2f4605842%2fhow-to-identify-platform-compiler-from-preprocessor-macros%23new-answer', 'question_page');
how to get the cookies from a php curl into a variable
... and a string with the header line.
You can use a code like this (adapted from TML response):
$cookies = Array();
$ch = curl_init('http://www.google.com/');
// Ask for the callback.
curl_setopt($ch, CURLOPT_HEADERFUNCTION, "curlResponseHeaderCallback");
$result = curl_exec($ch);
var_dump($cookies)...
Colspan all columns
... I recommend not using this method. Just got very strange result from Chrome on OSX (columns overlapping each other).
– Tzach
Nov 25 '14 at 16:07
...
ab load testing
...g: it indicates that you desire for your test to use the Keep Alive header from HTTP and sustain the connection). Since browsers do this and you're likely to want to simulate the stress and flow that your site will have from browsers, it is recommended you do a benchmark with this.
The final argume...
Measuring text height to be drawn on Canvas ( Android )
...he next section.
Paint.FontMetrics
You can calculate the hight of the font from the font metrics. The height is always the same because it is obtained from the font, not any particular text string.
Paint.FontMetrics fm = mTextPaint.getFontMetrics();
float height = fm.descent - fm.ascent;
The baseli...
Math.random() explanation
...
If you want to generate a number from 0 to 100, then your code would look like this:
(int)(Math.random() * 101);
To generate a number from 10 to 20 :
(int)(Math.random() * 11 + 10);
In the general case:
(int)(Math.random() * ((upperbound - lowerbound)...