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Identifying the dependency relationship for python packages installed with pip
...dencies as a tree structure e.g.:
$ pipdeptree
Lookupy==0.1
wsgiref==0.1.2
argparse==1.2.1
psycopg2==2.5.2
Flask-Script==0.6.6
- Flask [installed: 0.10.1]
- Werkzeug [required: >=0.7, installed: 0.9.4]
- Jinja2 [required: >=2.4, installed: 2.7.2]
- MarkupSafe [installed: 0.18...
Sort Dictionary by keys
...
172
let dictionary = [
"A" : [1, 2],
"Z" : [3, 4],
"D" : [5, 6]
]
let sortedKeys = Arra...
How can I obtain an 'unbalanced' grid of ggplots?
..., arrangeGrob(p,p,p, heights=c(3/4, 1/4, 1/4), ncol=1),
ncol=2)
Edit (07/2015): with v>2.0.0 you can use the layout_matrix argument,
grid.arrange(p,p,p,p, layout_matrix = cbind(c(1,1,1), c(2,3,4)))
shar...
Rotating videos with FFmpeg
... pass:
0 = 90CounterCLockwise and Vertical Flip (default)
1 = 90Clockwise
2 = 90CounterClockwise
3 = 90Clockwise and Vertical Flip
Use -vf "transpose=2,transpose=2" for 180 degrees.
Make sure you use a recent ffmpeg version from here (a static build will work fine).
Note that this will re-encod...
How does Python 2 compare string and int? Why do lists compare as greater than numbers, and tuples g
...
2 Answers
2
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How do you know when to use fold-left and when to use fold-right?
...re, you use a left fold. Example (haskell-style pseudocode)
foldl (-) [1, 2, 3] == (1 - 2) - 3 == 1 - 2 - 3 // - is left-associative
If your operator is right-associative (right fold), the parentheses would be set like this:
A x (B x (C x D))
Example: Cons-Operator
foldr (:) [] [1, 2, 3] == 1...
Set selected option of select box
...code into a $(document).ready:
$(function() {
$("#gate").val('gateway_2');
});
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How do I use spaces in the Command Prompt?
...
267
Single quotation marks won't do in that case. You have to add quotation marks around each path...
MongoDB logging all queries
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268
You can log all queries:
$ mongo
MongoDB shell version: 2.4.9
connecting to: test
> use my...
What does the “map” method do in Ruby?
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432
The map method takes an enumerable object and a block, and runs the block for each element, outp...