Same as readMaybe, but takes Text as input instead of String.

>>> read "123" :: Maybe Int
Just 123

Similar to commonPrefixes, but tries to find common prefix for all lines in given text.

>>> commonLinesPrefix "-- first\n-- second\n-- third"
Just "-- "

Similar to replace, but replaces only very first occurence of pattern.

>>> replaceFirst ":" "/" "a : b : c"
"a / b : c"

Maps given function over individual lines of the given text.

>>> mapLines ("T: " <>) "foo zz\nbar"
"T: foo zz\nT: bar"

Similar to mapLines, but the mapping function returns Foldable, which gives some more control over outcome. After mapping over all individual lines, results are folded and concatenated, which allows for example filtering out some lines.

>>> mapLinesF (\l -> if l == "bar" then Nothing else Just l) "foo\nbar"
"foo"

Similar to unlines, but does not automatically adds n at the end of the text. Advantage is that when used together with toLines, it doesn't ocassionaly change the newlines ad the end of input text:

>>> fromLines . toLines $ "foo\nbar"
"foo\nbar"

>>> fromLines . toLines $ "foo\nbar\n"
"foo\nbar\n"

Other examples:

>>> fromLines []
""

>>> fromLines ["foo"]
"foo"

>>> fromLines ["first", "second"]
"first\nsecond"

>>> fromLines ["first", "second", ""]
"first\nsecond\n"

Similar to lines, but does not drop trailing newlines from output. Advantage is that when used together with fromLines, it doesn't ocassionaly change the newlines ad the end of input text:

>>> fromLines . toLines $ "foo\nbar"
"foo\nbar"

>>> fromLines . toLines $ "foo\nbar\n"
"foo\nbar\n"

Other examples:

>>> toLines ""
[]

>>> toLines "first\nsecond"
["first","second"]

>>> toLines "first\nsecond\n"
["first","second",""]