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What does preceding a string literal with “r” mean? [duplicate]
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The r means that the string is to be treated as a raw string, which means all escape codes will be ignored.
For an example:
'\n' will be treated as a newline character, while r'\n' will be treated as the characters \ followed by n.
When an ...
How to check if a String contains only ASCII?
...ue if the character is a letter. But is there a way to quickly find if a String only contains the base characters of ASCII?
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Check if a String contains numbers Java
I'm writing a program where the user enters a String in the following format:
14 Answers
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How do I split a string so I can access item x?
Using SQL Server, how do I split a string so I can access item x?
44 Answers
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Can you attach Amazon EBS to multiple instances?
... to get an EBS volume attached to more than one instance, it would be a _REALLY_BAD_IDEA_. To quote Kekoa, "this is like using a hard drive in two computers at once"
Why is this a bad idea? ...
The reason you can't attach a volume to more than one instance is that EBS provides a "block storage" a...
How to declare a type as nullable in TypeScript?
...ptional which is different from nullable.
interface Employee1 {
name: string;
salary: number;
}
var a: Employee1 = { name: 'Bob', salary: 40000 }; // OK
var b: Employee1 = { name: 'Bob' }; // Not OK, you must have 'salary'
var c: Employee1 = { name: 'Bob', salary: undefined }; // OK
var d:...
Convert List into Comma-Separated String
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Enjoy!
Console.WriteLine(String.Join(",", new List<uint> { 1, 2, 3, 4, 5 }));
First Parameter: ","
Second Parameter: new List<uint> { 1, 2, 3, 4, 5 })
String.Join will take a list as a the second parameter and join all of the elements ...
MySQL integer field is returned as string in PHP
...from a MySQL database using PHP the datatype will always be converted to a string. You can convert it back to an integer using the following code:
$id = (int) $row['userid'];
Or by using the function intval():
$id = intval($row['userid']);
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Repeat a task with a time delay?
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You should use Handler's postDelayed function for this purpose. It will run your code with specified delay on the main UI thread, so you will be able to update UI controls.
private int mInterval = 5000; // 5 seconds by default, can be chan...
Converting an integer to a string in PHP
Is there a way to convert an integer to a string in PHP?
14 Answers
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