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How to detect if a variable is an array
...bj === 'object' to exclude primitives and host objects with types distinct from 'object' alltogether. This will still let string objects pass, which would have to be excluded manually.
In most cases, what you actually want to know is whether you can iterate over the object via numeric indices. Ther...
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...
How to set username and password for SmtpClient object in .NET?
I see different versions of the constructor, one uses info from web.config, one specifies the host, and one the host and port. But how do I set the username and password to something different from the web.config? We have the issue where our internal smtp is blocked by some high security clients and...
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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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)...
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().
...
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...
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...
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)...
How to identify platform/compiler from preprocessor macros?
...tackoverflow.com%2fquestions%2f4605842%2fhow-to-identify-platform-compiler-from-preprocessor-macros%23new-answer', 'question_page');