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How do I check if the Java JDK is installed on Mac?
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190
javac -version in a terminal will do
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Formula to determine brightness of RGB color
...ightness? Luminance?
Luminance (standard for certain colour spaces): (0.2126*R + 0.7152*G + 0.0722*B) [1]
Luminance (perceived option 1): (0.299*R + 0.587*G + 0.114*B) [2]
Luminance (perceived option 2, slower to calculate): sqrt( 0.241*R^2 + 0.691*G^2 + 0.068*B^2 ) → sqrt( 0.299*R^2 + 0.587*G^...
How can I add items to an empty set in python
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195
D = {} is a dictionary not set.
>>> d = {}
>>> type(d)
<type 'dict'>...
How to replace a hash key with another key
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answered Oct 10 '13 at 14:22
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How to identify numpy types in python?
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116
Use the builtin type function to get the type, then you can use the __module__ property to fin...
Installing Latest version of git in ubuntu
My Current git version 1.7.9.5...
5 Answers
5
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Count number of days between two dates
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10 Answers
10
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Set operations (union, intersection) on Swift array?
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186
Yes, Swift has the Set class.
let array1 = ["a", "b", "c"]
let array2 = ["a", "b", "d"]
let ...
How to parse JSON in Python?
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Very simple:
import json
data = json.loads('{"one" : "1", "two" : "2", "three" : "3"}')
print data['two']
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Converting JSON String to Dictionary Not List
...cess your dictionary by accessing item 0 in the list, as shown below:
json1_data = json.loads(json1_str)[0]
Now you can access the data stored in datapoints just as you were expecting:
datapoints = json1_data['datapoints']
I have one more question if anyone can bite: I am trying to take t...