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How to index into a dictionary?
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Dictionaries are unordered in Python versions up to and including Python 3.6. If you do not care about the order of the entries and want to access the keys or values by index anyway, you can use d.keys()[i] and d.values()[i] or d.items()[i]. (Note that these methods create a list of all keys, va...
jQuery animate backgroundColor
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334
The color plugin is only 4kb so much cheaper than the UI library. Of course you'll want to us...
Remove duplicate elements from array in Ruby
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the Tin Man
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answered Dec 3 '11 at 5:24
Mithun Sasidharan...
SQL query return data from multiple tables
...what colors we have in the car yard.
mysql> create table colors(id int(3) not null auto_increment primary key,
-> color varchar(15), paint varchar(10));
Query OK, 0 rows affected (0.01 sec)
mysql> show columns from colors;
+-------+-------------+------+-----+---------+---------------...
List of installed gems?
... >> Platform 0.4.0
# >> abstract 1.0.0
# >> actionmailer 3.0.5
# >> actionpack 3.0.5
# >> activemodel 3.0.5
# >> activerecord 3.0.5
Here's an updated way to get a list:
require 'rubygems'
def local_gems
Gem::Specification.sort_by{ |g| [g.name.downcase, g....
Using jQuery to compare two arrays of Javascript objects
...s are in different order.
NOTE: This works only for jquery versions < 3.0.0 when using JSON objects
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Programmatically creating Markdown tables in R with KnitR
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Now knitr (since version 1.3) package include the kable function for a creation tables:
> library(knitr)
> kable(head(iris[,1:3]), format = "markdown")
| Sepal.Length| Sepal.Width| Petal.Length|
|-------------:|------------:|-------------:|
|...
How to reorder data.table columns (without copying)
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Use setcolorder():
library(data.table)
x <- data.table(a = 1:3, b = 3:1, c = runif(3))
x
# a b c
# [1,] 1 3 0.2880365
# [2,] 2 2 0.7785115
# [3,] 3 1 0.3297416
setcolorder(x, c("c", "b", "a"))
x
# c b a
# [1,] 0.2880365 3 1
# [2,] 0.7785115 2 2
# [3,] 0.329741...
Why is there no xrange function in Python3?
Recently I started using Python3 and it's lack of xrange hurts.
6 Answers
6
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Python matplotlib multiple bars
...ime.datetime(2011, 1, 6, 0, 0)
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x = date2num(x)
y = [4, 9, 2]
z = [1, 2, 3]
k = [11, 12, 13]
ax = plt.subplot(111)
ax.bar(x-0.2, y, width=0.2, color='b', align='center')
ax.bar(x, z, width=0.2, color='g', align='center')
ax.bar(x+0.2, k, width=0.2, color='r', align='center')
ax.xaxis_date()
plt....