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App Inventor 2 颜色代码块 · App Inventor 2 中文网
... 接受 3 或 4 个数字的列表。 此列表中的这些数字表示 RGB 代码中的值。 RGB 代码用于在互联网上生成颜色。 RGB 颜色图表可在此处获得。 该列表中的第一个数字代表代码的 R 值，第二个代表 G，第三个代表 B，第四个值是可选的...
Preserve line endings
I run sed to do some substitution on windows and I noticed that it automatically converts line endings to Unix (\n). Is there an option to tell sed to use Windows line endings (\r\n) or even better to preserve the line endings from the file?
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Format floats with standard json module
...Note: This does not work in any recent version of Python.
Unfortunately, I believe you have to do this by monkey-patching (which, to my opinion, indicates a design defect in the standard library json package). E.g., this code:
import json
from json import encoder
encoder.FLOAT_REPR = lambda o: forma...
How to list branches that contain a given commit?
How can I query git to find out which branches contain a given commit? gitk will usually list the branches, unless there are too many, in which case it just says "many (38)" or something like that. I need to know the full list, or at least whether certain branches contain the commit.
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Vertical (rotated) label in Android
I need 2 ways of showing vertical label in Android:
10 Answers
10
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Applicatives compose, monads don't
What does the above statement mean? And when is one preferable to other?
5 Answers
5
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What is the difference between tree depth and height?
This is a simple question from algorithms theory.
The difference between them is that in one case you count number of nodes and in other number of edges on the shortest path between root and concrete node.
Which is which?
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How do I determine k when using k-means clustering?
I've been studying about k-means clustering , and one thing that's not clear is how you choose the value of k. Is it just a matter of trial and error, or is there more to it?
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How to bind function arguments without binding this?
In Javascript, how can I bind arguments to a function without binding the this parameter?
15 Answers
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Override valueof() and toString() in Java enum
The values in my enum are words that need to have spaces in them, but enums can't have spaces in their values so it's all bunched up. I want to override toString() to add these spaces where I tell it to.
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