大约有 15,000 项符合查询结果（耗时：0.0420秒） [XML]
What is the difference between a port and a socket?
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Generate colors between red and green for a power meter?
...hould work - just linearly scale the red and green values. Assuming your max red/green/blue value is 255, and n is in range 0 .. 100
R = (255 * n) / 100
G = (255 * (100 - n)) / 100
B = 0
(Amended for integer maths, tip of the hat to Ferrucio)
Another way to do would be to use a HSV colour model...
Why is null an object and what's the difference between null and undefined?
...Script: I don't know.
In short; undefined is where no notion of the thing exists; it has no type, and it's never been referenced before in that scope; null is where the thing is known to exist, but it's not known what the value is.
One thing to remember is that null is not, conceptually, the same as...
“Private” (implementation) class in Python
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Use a single underscore prefix:
class _Internal:
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This is the official Python convention for 'internal' symbols; "from module import *" does not import underscore-prefixed objects.
Edit: Reference to the single underscore convention
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How can I get the latest JRE / JDK as a zip file rather than EXE or MSI installer? [closed]
...ory (C:\JDK in this case)
Download latest version of JDK from Oracle (for example jdk-7u7-windows-x64.exe)
Download and install 7-Zip (or download 7-Zip portable version if you are not administrator)
With 7-Zip extract all the files from jdk-XuXX-windows-x64.exe into the directory C:\JDK
Execute the...
How to make a HTML Page in A4 paper size page(s)?
Is it possible to make a HTML page behave, for example, like a A4-sized page in MS Word?
15 Answers
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Converting an int to std::string
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@bparker Right, it's been fixed in gcc 4.8.0 I guess. MinGW coming with latest Code::Blocks (13.12) still has gcc 4.7.1.
– Archie
Dec 2 '15 at 16:24
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Return first N key:value pairs from dict
...no longer correct. Python dicts now preserve insertion order, and this is explicitly documented.
– Konrad Rudolph
Sep 22 at 12:30
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How to get duplicate items from a list using LINQ? [duplicate]
...t actually return all duplicate records, it returns all duplicate records EXCEPT for the first occurrence in each group. So yes, if you're after a list of just the distinct duplicate values then this answer, with the Distinct method is the way to go, but if you want all the duplicate rows, then Scot...
StringBuilder vs String concatenation in toString() in Java
...rom the question (compiled on JDK 1.6.0_16) and found the optimization as expected. I'm pretty sure all modern compilers will do it.
– Michael Borgwardt
Oct 7 '09 at 16:12
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