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How to “test” NoneType in python?
...can use is operator to check if a variable has None in it or not.
Quoting from is docs,
The operators is and is not test for object identity: x is y is true if and only if x and y are the same object. x is not y yields the inverse truth value.
Since there can be only one instance of None, is ...
Do I need to explicitly call the base virtual destructor?
...ike other virtual methods, where you would explicitly call the Base method from the Derived to 'chain' the call, the compiler generates code to call the destructors in the reverse order in which their constructors were called.
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How to remove unwanted space between rows and columns in table?
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Add this CSS reset to your CSS code: (From here)
/* http://meyerweb.com/eric/tools/css/reset/
v2.0 | 20110126
License: none (public domain)
*/
html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, ad...
Sort array of objects by single key with date value
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If you want to sort based on numeric values from your keys then this ES6 one-liner might be of help. yourArr.sort((a, b) => a.yourNumericOrderingKey > b.yourNumericOrderingKey). In my case I had to sort based on an order key that was coming inside the objects of ...
How to flip windows in vim? [duplicate]
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Ctrl-w H or type :wincmd H to go from horizontal to vertical layout.
Ctrl-w J or type :wincmd J to go from vertical to horizontal layout.
Ctrl-w r or type :wincmd r to swap the two buffers but keep the window layout the same.
Ctrl-w w or type :wincmd w to...
C# code to validate email address
...evel domains, check the domain for an MX record, check for spelling errors from common domain names (gmail.cmo), etc. Then present a warning giving the user a chance to say "yes, my mail server really does allow ???????????? as an email address."
As for using exception handling for business logic...
Why is \r a newline for Vim?
From question How to replace a character for a newline in Vim? . You have to use \r when replacing text for a newline, like this
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How to manually install an artifact in Maven 2?
...ed to install an artifact manually with Maven 2. I wanted to install a jar from a local directory with the command
6 Answer...
How do I include a newline character in a string in Delphi?
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{$IFDEF MSWINDOWS} AnsiString(#13#10) {$ENDIF};
This is from Delphi 2009 (notice the use of AnsiChar and AnsiString). (Line wrap added by me.)
So if you want to make your TLabel wrap, make sure AutoSize is set to true, and then use the following code:
label1.Caption := 'Line on...
.ps1 cannot be loaded because the execution of scripts is disabled on this system [duplicate]
I run this code to execute PowerShell code from an ASP.NET application:
5 Answers
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