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How to declare a type as nullable in TypeScript?
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All fields in JavaScript (and in TypeScript) can have the value null or undefined.
You can make the field optional which is different from nullable.
interface Employee1 {
name: string;
salary: number;
}
var a: Employee1 = { name: 'Bob', sal...
“Failed to load platform plugin ”xcb“ ” while launching qt5 app on linux without qt installed
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shows that xcb depends on libQt5DBus.so.5 in addition to libQt5Core.so.5 and libQt5Gui.so.5 (and many other system libs). Add libQt5DBus.so.5 to your collection of shared libs and you should be ready to move on.
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HTML minification? [closed]
Is there a online tool that we can input the HTML source of a page into and will minify the code?
8 Answers
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Most efficient T-SQL way to pad a varchar on the left to a certain length?
...right('XXXXXXXXXXXX'+ rtrim(@str), @n)
where X is your padding character and @n is the number of characters in the resulting string (assuming you need the padding because you are dealing with a fixed length).
But as I said you should really avoid doing this in your database.
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How do I convert a Vector of bytes (u8) to a string
I am trying to write simple TCP/IP client in Rust and I need to print out the buffer I got from the server.
3 Answers
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Switch statement multiple cases in JavaScript
...one feature of switch ... case. It's too easy to forget a break statement, and if you use fall through intentionally, those forgotten break statements can be very hard to spot. This method lookup version also has lots of great features that switch ... case lacks, such as dynamic extensibility, or t...
Cause of a process being a deadlock victim
...L database engine. At the same time we have another process doing updates and inserts into the same database and same tables. The first process has started, recently to end prematurely with a message
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How to add an integer to each element in a list?
If I have list=[1,2,3] and I want to add 1 to each element to get the output [2,3,4] ,
how would I do that?
11 Answers...
Type definition in object literal in TypeScript
...has methods as well as properties? Since the class doesn't get initialized and we only assign properties, calling a method on the class will cause a null exception. Basically, the object we create only 'acts' as the class because we assign its type, but it is not actually an instance of that class. ...
Query EC2 tags from within instance
... use a combination of the AWS metadata tool (to retrieve your instance ID) and the new Tag API to retrieve the tags for the current instance.
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