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What is the most pythonic way to check if an object is a number?
...decimal import Decimal
... from fractions import Fraction
... for n in [2, 2.0, Decimal('2.0'), complex(2, 0), Fraction(2, 1), '2']:
... print(f'{n!r:>14} {isinstance(n, Number)}')
2 True
2.0 True
Decimal('2.0') True
(2+0j) True
Fraction(2, 1) True
...
How to migrate/convert from SVN to Mercurial (hg) on windows
...any thanks to bgever for pointing out in the comments that with TortoiseHg 2.0, enabling the convert extension is easier than ever. As he says
With TortoiseHG 2.0 this has been made
much simpler: Start the TortoiseHG
Workbench from the Start menu. Select
File --> Settings. Select Exten...
How to reset db in Django? I get a command 'reset' not found error
...
if you are using Django 2.0
Then
python manage.py flush
will work
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Multiply TimeSpan in .NET
...or TimeSpan!!!
But only for .NET Core and .NET Standard.
Since .NET Core 2.0 (or .NET Standard 2.1) you can successfully run the following code:
Console.WriteLine(TimeSpan.FromSeconds(45) * 3);
// Prints:
// 00:02:15
Limitations
Nevertheless, it is important to note (as described in the docu...
Is there something like RStudio for Python? [closed]
...
Yhat released Rodeo 2.0 (native app not a browser tool) for Windows, Mac & Linux in 2016. It's a lot more stable than it was and has lots of new features like syntax highlighting and integrated tutorials. Definitely worth checking out if you...
Default behavior of “git push” without a branch specified
...considered to be matching.
This used to be the default, but not since Git 2.0 (simple is the new default).
upstream: push the current branch to its upstream branch (tracking is a deprecated synonym for upstream)
current: push the current branch to a branch of the same name
simple: (new in Git 1.7.1...
public static const in TypeScript
...attempt to set the BOOK_SHELF_NONE property to a new value doesn't work.
2.0
In TypeScript 2.0, you can use readonly to achieve very similar results:
export class Library {
public static readonly BOOK_SHELF_NONE = "None";
public static readonly BOOK_SHELF_FULL = "Full";
}
The syntax is...
Anonymous method in Invoke call
...need to tell the compiler what type of delegate to create ; MethodInvoker (2.0) or Action (3.5) are common choices (note they have the same signature); like so:
control.Invoke((MethodInvoker) delegate {this.Text = "Hi";});
If you need to pass in parameters, then "captured variables" are the way:
...
Migrating from JSF 1.2 to JSF 2.0
... in JSF 1.2 .
JSF 1.2 is around 6 years old now. I need to upgrade to JSF 2.0. How painful will this be? I noticed that some attributes in custom tags have been changed etc.
...
How do I concatenate or merge arrays in Swift?
... the arrays with +, building a new array
let c = a + b
print(c) // [1.0, 2.0, 3.0, 4.0, 5.0, 6.0]
or append one array to the other with += (or append):
a += b
// Or:
a.append(contentsOf: b) // Swift 3
a.appendContentsOf(b) // Swift 2
a.extend(b) // Swift 1.2
print(a) // [1.0,...