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How to calculate date difference in JavaScript?
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Assuming you have two Date objects, you can just subtract them to get the difference in milliseconds:
var difference = date2 - date1;
From there, you can use simple arithmetic to derive the other values.
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AttributeError: 'module' object has no attribute
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You have mutual top-level imports, which is almost always a bad idea.
If you really must have mutual imports in Python, the way to do it is to import them within a function:
# In b.py:
def cause_a_to_do_something():
import a
a.do_something()
Now a.py can safely do import b...
Enum “Inheritance”
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This is not possible. Enums cannot inherit from other enums. In fact all enums must actually inherit from System.Enum. C# allows syntax to change the underlying representation of the enum values which looks like inheritance, but in actualit...
Sort points in clockwise order?
...unction to end up with something looking rather "solid", as convex as possible with no lines intersecting.
5 Answers
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How do I remove all HTML tags from a string without knowing which tags are in it?
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You can use a simple regex like this:
public static string StripHTML(string input)
{
return Regex.Replace(input, "<.*?>", String.Empty);
}
Be aware that this solution has its own flaw. See Remove HTML tags in String for more information (especially the c...
How to use arguments from previous command?
...nt of the previous command.
To specify an argument, press Escape and a number or hold Alt and press a number. You can do Alt--to begin specifying a negative number then release Alt and press the digit (this will count from the end of the list of arguments.
Example:
Enter the following command
$ ...
In Node.js, how do I “include” functions from my other files?
...// ========
module.exports = {
foo: function () {
// whatever
},
bar: function () {
// whatever
}
};
var zemba = function () {
}
And in your app file:
// app.js
// ======
var tools = require('./tools');
console.log(typeof tools.foo); // => 'function'
console.log(typeof tools.b...
What does `someObject.new` do in Java?
... to instantiate a non-static inner class from outside the containing class body, as described in the Oracle docs.
Every inner class instance is associated with an instance of its containing class. When you new an inner class from within its containing class it uses the this instance of the contain...
LEFT JOIN vs. LEFT OUTER JOIN in SQL Server
What is the difference between LEFT JOIN and LEFT OUTER JOIN ?
12 Answers
12
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Git submodule head 'reference is not a tree' error
I have a project with a submodule that is pointing to an invalid commit: the submodule commit remained local and when I try to fetch it from another repo I get:
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