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Java HashMap performance optimization / alternative
I want to create a large HashMap but the put() performance is not good enough. Any ideas?
25 Answers
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What's the purpose of git-mv?
...ame newname
git add newname
git rm oldname
i.e. it updates the index for both old and new paths automatically.
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Converting RGB to grayscale/intensity
When converting from RGB to grayscale, it is said that specific weights to channels R, G, and B ought to be applied. These weights are: 0.2989, 0.5870, 0.1140.
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Convert nested Python dict to object?
I'm searching for an elegant way to get data using attribute access on a dict with some nested dicts and lists (i.e. javascript-style object syntax).
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Add custom messages in assert?
Is there a way to add or edit the message thrown by assert? I'd like to use something like
8 Answers
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Algorithm to return all combinations of k elements from n
...to write a function that takes an array of letters as an argument and a number of those letters to select.
71 Answers
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java: Class.isInstance vs Class.isAssignableFrom
Let clazz be some Class and obj be some Object .
4 Answers
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How to run only one local test class on Gradle
I am new to Gradle. I use Gradle 1.10 and Ubuntu 13.
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How do I merge two dictionaries in a single expression in Python (taking union of dictionaries)?
...dictionaries, merged (i.e. taking the union). The update() method would be what I need, if it returned its result instead of modifying a dictionary in-place.
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Undefined behavior and sequence points
...ndard do not formally contain 'sequence points'; operations are 'sequenced before' or 'unsequenced' or 'indeterminately sequenced' instead. The net effect is essentially the same, but the terminology is different.
Disclaimer : Okay. This answer is a bit long. So have patience while reading it. I...