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Regular Expression for alphanumeric and underscores
I would like to have a regular expression that checks if a string contains only upper and lowercase letters, numbers, and underscores.
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How to enumerate an enum with String type?
...n, you may specify the conformance directly in the declaration:
enum Suit: String, CaseIterable { case spades = "♠"; case hearts = "♥"; case diamonds = "♦"; case clubs = "♣" }
Then the following code will print all possible values:
Suit.allCases.forEach {
print($0.rawValue)
}
Compatib...
How can I determine if a String is non-null and not only whitespace in Groovy?
Groovy adds the isAllWhitespace() method to Strings, which is great, but there doesn't seem to be a good way of determining if a String has something other than just white space in it.
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Test if string is a guid without throwing exceptions?
I want to try to convert a string to a Guid, but I don't want to rely on catching exceptions (
18 Answers
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How do I determine whether an array contains a particular value in Java?
I have a String[] with values like so:
29 Answers
29
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Limit the length of a string with AngularJS
...max (integer) - max length of the text, cut to this number of chars,
tail (string, default: ' …') - add this string to the input
string if the string was cut.
Another solution: http://ngmodules.org/modules/angularjs-truncate (by @Ehvince)
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How can I trim leading and trailing white space?
...read.table you can set the parameterstrip.white=TRUE.
If you want to clean strings afterwards you could use one of these functions:
# Returns string without leading white space
trim.leading <- function (x) sub("^\\s+", "", x)
# Returns string without trailing white space
trim.trailing <- fun...
Scala: What is a TypeTag and how do I use it?
...lass Bar extends Foo
def meth[A](xs: List[A]) = xs match {
case _: List[String] => "list of strings"
case _: List[Foo] => "list of foos"
}
we will get warnings:
<console>:23: warning: non-variable type argument String in type pattern List[String]↩
is unchecked since it is elimi...
How to create a new object instance from a Type
...):
Iterations: 5000000
00:00:00.8481762, Activator.CreateInstance(string, string)
00:00:00.8416930, Activator.CreateInstance(type)
00:00:06.6236752, ConstructorInfo.Invoke
00:00:00.1776255, Compiled expression
00:00:00.0462197, new
Statistics (2015, .net 4.5, x64):
It...
PHP convert XML to JSON
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Json & Array from XML in 3 lines:
$xml = simplexml_load_string($xml_string);
$json = json_encode($xml);
$array = json_decode($json,TRUE);
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