Difference between revisions of "String Operations"
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== Splitting strings == | == Splitting strings == | ||
| + | |||
| + | Splitting a string means turning it into an array. For example, you might want to take a string like this '''"Hello world"''' and turn it into an array of Strings, like this '''["Hello", "world"]'''. | ||
| + | |||
| + | Here are more examples: | ||
<nowiki> | <nowiki> | ||
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does | does | ||
rock. | rock. | ||
| + | |||
| + | scala> | ||
| + | </nowiki> | ||
| + | |||
| + | |||
| + | == How to remove characters from a string == | ||
| + | |||
| + | To remove one or more characters from the ''start'' of a String, use the '''drop()''' method: | ||
| + | |||
| + | <nowiki> | ||
| + | scala> mystring.drop(1) | ||
| + | res6: String = ello world! | ||
| + | |||
| + | scala> mystring.drop(5) | ||
| + | res7: String = world! | ||
scala> | scala> | ||
</nowiki> | </nowiki> | ||
Revision as of 01:23, 21 February 2011
Really, really, long strings
Instead of using " you can use """ (three double quote marks) as a string delimeter if you want to define a really, really long string that is split over several lines. Like this:
val really_long_string = """<html>
<head>
<title>Looooong Scala String</title>
</head>
<body>
<h1>This is a very long string indeed!</h1>
</body>
</html>"""
println(really_long_string)
Splitting strings
Splitting a string means turning it into an array. For example, you might want to take a string like this "Hello world" and turn it into an array of Strings, like this ["Hello", "world"].
Here are more examples:
scala> val mystring = "Hello, I like Scala! It, does, rock."
mystring: java.lang.String = Hello, I like Scala! It, does, rock.
scala> mystring.split(",")
res0: Array[java.lang.String] = Array(Hello, I like Scala! It, does, rock.)
scala> mystring.split(",").foreach((msg:String) => println(msg))
Hello
I like Scala! It
does
rock.
scala>
How to remove characters from a string
To remove one or more characters from the start of a String, use the drop() method:
scala> mystring.drop(1) res6: String = ello world! scala> mystring.drop(5) res7: String = world! scala>
