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Find Oracle JDBC driver in Maven repository
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22 Answers
22
Active
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Cluster analysis in R: determine the optimal number of clusters
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1024
If your question is how can I determine how many clusters are appropriate for a kmeans analysis...
How to merge 2 JSON objects from 2 files using jq?
...t will merge them recursively. For example,
jq -s '.[0] * .[1]' file1 file2
Important: Note the -s (--slurp) flag, which puts files in the same array.
Would get you:
{
"value1": 200,
"timestamp": 1382461861,
"value": {
"aaa": {
"value1": "v1",
"value2": "v2",
"value3...
What are bitwise shift (bit-shift) operators and how do they work?
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1728
The bit shifting operators do exactly what their name implies. They shift bits. Here's a brie...
How to validate IP address in Python? [duplicate]
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answered Nov 25 '08 at 23:50
DustinDustin
78.2k1717 gold badges103103 silver badges131131 bronze badges
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Alphabet range in Python
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822
>>> import string
>>> string.ascii_lowercase
'abcdefghijklmnopqrstuvwxyz'
I...
Measuring the distance between two coordinates in PHP
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12 Answers
12
Active
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How to convert a string or integer to binary in Ruby?
... number to a string representing the number in the base specified:
9.to_s(2) #=> "1001"
while the reverse is obtained with String#to_i(base):
"1001".to_i(2) #=> 9
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How do you do relative time in Rails?
... i.e. if given a certain Time class, it can calculate "30 seconds ago" or "2 days ago" or if it's longer than a month "9/1/2008", etc.
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Resizing an image in an HTML5 canvas
...g.height;
elem.style.display = "none";
this.ctx = elem.getContext("2d");
this.ctx.drawImage(img, 0, 0);
this.img = img;
this.src = this.ctx.getImageData(0, 0, img.width, img.height);
this.dest = {
width : sx,
height : Math.round(img.height * sx / img.width),
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