n05StringTemplates.kt

package i_introduction._5_String_Templates

import util.TODO
import util.doc5

fun example1(a: Any, b: Any) =
        "This is some text in which variables ($a, $b) appear."

fun example2(a: Any, b: Any) =
        "You can write it in a Java way as well. Like this: " + a + ", " + b + "!"

fun example3(c: Boolean, x: Int, y: Int) = "Any expression can be used: ${if (c) x else y}"

fun example4() =
        """
You can use raw strings to write multiline text.
There is no escaping here, so raw strings are useful for writing regex patterns,
you don't need to escape a backslash by a backslash.
String template entries (${42}) are allowed here.
"""

fun getPattern() = """\d{2}\.\d{2}\.\d{4}"""

fun example() = "13.06.1992".matches(getPattern().toRegex()) //true

val month = "(JAN|FEB|MAR|APR|MAY|JUN|JUL|AUG|SEP|OCT|NOV|DEC)"

fun todoTask5(): Nothing = TODO(
    """
        Task 5.
        Copy the body of 'getPattern()' to the 'task5()' function below
        and rewrite it in such a way that it matches format: '13 JUN 1992'.
        Use the 'month' variable.
    """,
    documentation = doc5(),
    references = { getPattern(); month })

fun task5(): String = todoTask5()