Phrase reversals: Difference between revisions

=={{header|Nim}}==

<lang Nim>import algorithm, sequtils, strutils

const Phrase = "rosetta code phrase reversal"

echo "Phrase: ", Phrase

echo "Reversed phrase: ", reversed(Phrase).join()

echo "Reversed words: ", Phrase.split().mapIt(reversed(it).join()).join(" ")

echo "Reversed word order: ", reversed(Phrase.split()).join(" ")</lang>

If we prefer to avoid using modules “algorithm” and “sequtils” and produce somewhat more efficient (but also more verbose) code, here is another solution:

<lang Nim>import strutils

const Phrase = "rosetta code phrase reversal"

proc reversed(s: string): string =

for i in countdown(s.high, 0):

result.add s[i]

proc reversedWords(s: string): string =

let words = s.split()

result = reversed(words[0])

for i in 1..words.high:

result.add ' ' & reversed(words[i])

proc reversedWordOrder(s: string): string =

let words = s.split()

result = words[^1]

for i in countdown(words.high - 1, 0):

result.add ' ' & words[i]

echo "Phrase: ", Phrase

echo "Reversed phrase: ", reversed(Phrase)

echo "Reversed words: ", reversedWords(Phrase)

echo "Reversed word order: ", reversedWordOrder(Phrase)</lang>

{{out}}

<pre>Phrase: rosetta code phrase reversal

Reversed phrase: lasrever esarhp edoc attesor

Reversed words: attesor edoc esarhp lasrever

Reversed word order: reversal phrase code rosetta</pre>