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Is null check needed before calling instanceof?
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Specifically, in Item 8, he notes that in equals() methods, one instanceof operator serves two purposes - it verifies that the argument is both non-null and of the correct type. "...[S]o you don't need a separate null check."
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Is there a decorator to simply cache function return values?
...(maxsize=100, typed=False)
Decorator to wrap a function with a memoizing callable that saves up to the maxsize most recent calls. It can save time when an expensive or I/O bound function is periodically called with the same arguments.
Example of an LRU cache for computing Fibonacci numbers:
@lr...
Can I use a min-height for table, tr or td?
...00px;
}
Table cells will grow when the content does not fit.
https://jsfiddle.net/qz70zps4/
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Overload with different return type in Java?
...e alone is not sufficient for the compiler to figure out which function to call:
public int foo() {...}
public float foo() {..}
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foo(); // which one?
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try/catch versus throws Exception
...ropagate. (I'm assuming that showException doesn't rethrow it.)
So if you call the first method and "do something" fails, then the caller will have to handle the exception. If you call the second method and "do something" fails, then the caller won't see an exception at all... which is generally a ...
Redirecting Output from within Batch file
...r good and fast way that only opens and positions the file once
@echo off
call :sub >output.txt
exit /b
:sub
command1
command2
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commandN
Edit 2020-04-17
Every now and then you may want to repeatedly write to two or more files. You might also want different messages on the screen. It is st...
Why does the expression 0 < 0 == 0 return False in Python?
...to say 0 < x <= 5 than to say (0 < x) and (x <= 5).
These are called chained comparisons. And that's a link to the documentation for them.
With the other cases you talk about, the parenthesis force one relational operator to be applied before the other, and so they are no longer chaine...
Static class initializer in PHP
...te some code). Then, in my autoloader, when it loads a class it checks is_callable($class, '__init__'). If it is, it calls that method. Quick, simple and effective...
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How to get JSON response from http.Get
...uction as this answer originally demonstrated! (Which is what http.Get/etc call to). The reason is that the default client has no timeout set; if the remote server is unresponsive, you're going to have a bad day.
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Android detect Done key press for OnScreen Keyboard
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Yes, it is possible:
editText = (EditText) findViewById(R.id.edit_text);
editText.setOnEditorActionListener(new TextView.OnEditorActionListener() {
@Override
public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
if (actionId == EditorInfo.IM...