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App Inventor 2 DynamicComponents 拓展：动态创建AI2组件对象 · App Inventor 2 中文网
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Is it possible to specify your own distance function using scikit-learn K-Means Clustering?
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Here's a small kmeans that uses any of the 20-odd distances in
scipy.spatial.distance, or a user function.
Comments would be welcome (this has had only one user so far, not enough);
in particular, what are your N, dim, k, metric ?
#!/usr/bin/env python
# kmeans.py us...
Get current AUTO_INCREMENT value for any table
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Harshil Sharma
1,62111 gold badge2020 silver badges4848 bronze badges
answered Apr 4 '13 at 20:56
methaimethai
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Simple explanation of MapReduce?
... them back in the same kind of list.
suppose I have a list of numbers: [1,2,3] and I want to double every number, in this case, the function to "double every number" is function x = x * 2. And without mappings, I could write a simple loop, say
A = [1, 2, 3]
foreach (item in A) A[item] = A[item] * ...
How do I get a substring of a string in Python?
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3271
>>> x = "Hello World!"
>>> x[2:]
'llo World!'
>>> x[:2]
'He'
>&g...
How to format time since xxx e.g. “4 minutes ago” similar to Stack Exchange sites
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25 Answers
25
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C# difference between == and Equals()
I have a condition in a silverlight application that compares 2 strings, for some reason when I use == it returns false while .Equals() returns true .
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App Inventor 2 试验组件 · App Inventor 2 中文网
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Firebase数...
Best way to make Java's modulus behave like it should with negative numbers?
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Maarten Bodewes
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answered Dec 10 '10 at 18:46
Peter LawreyPete...
What is the easiest way to push an element to the beginning of the array?
...elf, moving other elements upwards.
And in use:
irb>> a = [ 0, 1, 2]
=> [0, 1, 2]
irb>> a.unshift('x')
=> ["x", 0, 1, 2]
irb>> a.inspect
=> "["x", 0, 1, 2]"
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