Function stripPrefix

stripPrefix<T>(
equalityT: TypeClass.PartialEq.PartialEq<T>,
): (
prefix: List.List<T>,
) => (list: List.List<T>) => Option.Option<List.List<T>>

Strips list if matches prefix, otherwise returns none.

Type Parameters

Parameters

equalityT: TypeClass.PartialEq.PartialEq<T>
The equality for T.

Returns (prefix: List.List<T>) => (list: List.List<T>) => Option.Option<List.List<T>>

The stripped list.

Examples

Example

const stripFoo = stripPrefix(PartialEq.strict<string>())(fromString("foo"));

{
    const optList = stripFoo(fromString("foobar"));
    const optStr = Option.map(toString)(optList);
    expect(optStr).toStrictEqual(Option.some("bar"));
}
{
    const optList = stripFoo(fromString("foo"));
    const optStr = Option.map(toString)(optList);
    expect(optStr).toStrictEqual(Option.some(""));
}
{
    const optList = stripFoo(fromString("barfoo"));
    const optStr = Option.map(toString)(optList);
    expect(optStr).toStrictEqual(Option.none());
}