大约有 922 项符合查询结果（耗时：0.0113秒） [XML]
Android: textColor of disabled button in selector not showing?
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You need to also create a ColorStateList for text colors identifying different states.
Do the following:
Create another XML file in res\color named something like text_color.xml.
<?xml version="1.0" encoding="utf-8"?>
<selec...
How to get the current date/time in Java [duplicate]
...f date / time you want:
If you want the date / time as a single numeric value, then System.currentTimeMillis() gives you that, expressed as the number of milliseconds after the UNIX epoch (as a Java long). This value is a delta from a UTC time-point, and is independent of the local time-zone ... ...
With bash, how can I pipe standard error into another process?
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There is also process substitution. Which makes a process substitute for a file.
You can send stderr to a file as follows:
process1 2> file
But you can substitute a process for the file as follows:
process1 2> >(process2...
What exactly is Spring Framework for? [closed]
I hear a lot about Spring , people are saying all over the web that Spring is a good framework for web development. What exactly is Spring Framework for?
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Why is the JVM stack-based and the Dalvik VM register-based?
... did Sun decide to make the JVM stack-based and Google decide to make the DalvikVM register-based?
3 Answers
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Why is there no GIL in the Java Virtual Machine? Why does Python need one so bad?
I'm hoping someone can provide some insight as to what's fundamentally different about the Java Virtual Machine that allows it to implement threads nicely without the need for a Global Interpreter Lock (GIL), while Python necessitates such an evil.
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C/C++ with GCC: Statically add resource files to executable/library
Does anybody have an idea how to statically compile any resource file right into the executable or the shared library file using GCC?
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Default function arguments in Rust
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No, it is not at present. I think it likely that it will eventually be implemented, but there’s no active work in this space at present.
The typical technique employed here is to use functions or methods with different names and signatures.
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Principal component analysis in Python
I'd like to use principal component analysis (PCA) for dimensionality reduction. Does numpy or scipy already have it, or do I have to roll my own using numpy.linalg.eigh ?
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Avoid synchronized(this) in Java?
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I'll cover each point separately.
Some evil code may steal your lock (very popular this one, also has an
"accidentally" variant)
I'm more worried about accidentally. What it amounts to is that this use of this is part of your class' exposed interface, and should be documented...