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gcc makefile error: “No rule to make target …”
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That's usually because you don't have a file called vertex.cpp available to make. Check that:
that file exists.
you're in the right directory when you make.
Other than that, I've not much else to suggest. Perhaps you could give us ...
Does JavaScript have the interface type (such as Java's 'interface')?
...That's not a big deal until you realize:
JavaScript is an extremely dynamically typed language -- you can create an object with the proper methods, which would make it conform to the interface, and then undefine all the stuff that made it conform. It'd be so easy to subvert the type system -- even a...
Is there a simple way to delete a list element by value?
...('b')
>>> print(a)
['a', 'c', 'd']
Mind that it does not remove all occurrences of your element. Use a list comprehension for that.
>>> a = [10, 20, 30, 40, 20, 30, 40, 20, 70, 20]
>>> a = [x for x in a if x != 20]
>>> print(a)
[10, 30, 40, 30, 40, 70]
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Select n random rows from SQL Server table
...the key scan of values plus the join cost, which on a large table with a small percentage selection should be reasonable.
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How can I get a list of build targets in Ant?
... the available built targets without having to search through the file manually. Does ant have a command for this - something like ant show-targets - that will make it list all the targets in the build file?
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Map.clear() vs new Map : Which one will be better? [duplicate]
...stance, which is backed with new array. So, garbage collector should clear all the key and values from the previous map, and clear the reference to itself. So O(n) algorithm is executed anyway, but in the garbage collector thread. For 1000 records you won't see any difference.
BUT. The performance ...
Coroutine vs Continuation vs Generator
.... As @zvolkov mentioned, they're functions/objects that can be repeatedly called without returning, but when called will return (yield) a value and then suspend their execution. When they're called again, they will start up from where they last suspended execution and do their thing again.
A genera...
Clearing using jQuery
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Easy: you wrap a <form> around the element, call reset on the form, then remove the form using .unwrap(). Unlike the .clone() solutions otherwise in this thread, you end up with the same element at the end (including custom properties that were set on it).
Tested and wo...
Disable scrolling in webview?
...mething I haven't been able to figure out on Android is how to programmatically prevent scrolling in a WebView ?
14 Answer...
private final static attribute vs private final attribute
...riable);
That makes the behaviour much more obvious. Modern IDEs will usually suggest changing the second listing into the third.
There is no reason to have an inline declaration initializing the value like the following, as each instance will have its own NUMBER but always with the same value (i...