大约有 44,300 项符合查询结果（耗时：0.0497秒） [XML]
How do I determine k when using k-means clustering?
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142
You can maximize the Bayesian Information Criterion (BIC):
BIC(C | X) = L(X | C) - (p / 2) * lo...
How to use JavaScript variables in jQuery selectors?
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245
var name = this.name;
$("input[name=" + name + "]").hide();
OR you can do something like thi...
Error on pod install
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234
If you landed here on or after January 30th 2014, there is a break in CocoaPods causing this. ...
Key existence check in HashMap
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523
Do you ever store a null value? If not, you can just do:
Foo value = map.get(key);
if (value !...
How to execute a Ruby script in Terminal?
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251
Just call: ruby your_program.rb
or
start your program with #!/usr/bin/env ruby,
make your f...
How to insert an item at the beginning of an array in PHP?
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284
Use array_unshift($array, $item);
$arr = array('item2', 'item3', 'item4');
array_unshift($arr...
How to check if a number is a power of 2
Today I needed a simple algorithm for checking if a number is a power of 2.
25 Answers
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Does Swift have documentation generation support?
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12 Answers
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Update Eclipse with Android development tools v. 23
I updated Eclipse with the new SDK tools (rev. 23), but now when Eclipse starts I receive the error:
43 Answers
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What is the most efficient way to concatenate N arrays?
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20 Answers
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