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Creating a new column based on if-elif-else condition
...
140
To formalize some of the approaches laid out above:
Create a function that operates on the rows...
What does value & 0xff do in Java?
... = value;
then result would end up with the value ff ff ff fe instead of 00 00 00 fe. A further subtlety is that the & is defined to operate only on int values1, so what happens is:
value is promoted to an int (ff ff ff fe).
0xff is an int literal (00 00 00 ff).
The & is applied to yield...
Turn a number into star rating display using jQuery and CSS
...tars, span.stars span {
display: block;
background: url(stars.png) 0 -16px repeat-x;
width: 80px;
height: 16px;
}
span.stars span {
background-position: 0 0;
}
Image
(source: ulmanen.fi)
Note: do NOT hotlink to the above image! Copy the file to your own server and u...
How do I set a background-color for the width of text, not the width of the entire element, using CS
... I want is for the green background to be just behind the text, not to be 100% of the page width. Here is my current code:
...
What does ~~ (“double tilde”) do in Javascript?
...result is a number.
In other words, it yields:
function(x) {
if(x < 0) return Math.ceil(x);
else return Math.floor(x);
}
only if x is between -(231) and 231 - 1. Otherwise, overflow will occur and the number will "wrap around".
This may be considered useful to convert a function's string...
Clear icon inside input text
...ch" to your input
The support is pretty decent but will not work in IE<10
<input type="search">
Clearable input for old browsers
If you need IE9 support here are some workarounds
Using a standard <input type="text"> and some HTML elements:
/**
* Clearable text ...
Is there a splice method for strings?
...
10 Answers
10
Active
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Is it possible to specify your own distance function using scikit-learn K-Means Clustering?
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80
Here's a small kmeans that uses any of the 20-odd distances in
scipy.spatial.distance, or a user...
What's the difference between “mod” and “remainder”?
... |
edited Jul 18 '13 at 20:13
Grijesh Chauhan
51.1k1515 gold badges117117 silver badges179179 bronze badges
...
Gem::LoadError for mysql2 gem, but it's already in Gemfile
... with rails 4.1.5) try using this version of mysql2:
gem 'mysql2', '~> 0.3.18'
Apparently mysql2 isn't still compatible with newer version of rails because rails 4.2.4 is pretty new as the time of answering this question by me 8 September 2015 so use the above line in your Gem file and run:
...