String comparison: Difference between revisions
Added Wren
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# This is false. Strings are not coerced to numbers and vice-versa.
== '3' 3 -- io.writeln io.stdout;</lang>
=={{header|Wren}}==
{{libheader|Wren-str}}
The only string comparisons built into the language itself are equality and inequality. However, the above module enables us to do full lexicographical comparisons of any strings, including numeric strings, by comparing their corresponding Unicode codepoints.
Case insensitive comparisons can be achieved by converting both strings to the same case before the comparisons are made.
<lang ecmascript>import "/str" for Str
var compareStrings = Fn.new { |a, b, sens|
System.write("Comparing '%(a)' and '%(b)', ")
var c
var d
if (sens) {
System.print("case sensitively:")
c = a
d = b
} else {
System.print("case insensitively:")
c = Str.lower(a)
d = Str.lower(b)
}
System.print(" %(a) < %(b) -> %(Str.lt(c, d))")
System.print(" %(a) > %(b) -> %(Str.gt(c, d))")
System.print(" %(a) == %(b) -> %(c == d)")
System.print(" %(a) != %(b) -> %(c != d)")
System.print(" %(a) <= %(b) -> %(Str.le(c, d))")
System.print(" %(a) >= %(b) -> %(Str.ge(c, d))")
System.print()
}
compareStrings.call("cat", "dog", true)
compareStrings.call("Rat", "RAT", true)
compareStrings.call("Rat", "RAT", false)
compareStrings.call("1100", "200", true)</lang>
{{out}}
<pre>
Comparing 'cat' and 'dog', case sensitively:
cat < dog -> true
cat > dog -> false
cat == dog -> false
cat != dog -> true
cat <= dog -> true
cat >= dog -> false
Comparing 'Rat' and 'RAT', case sensitively:
Rat < RAT -> false
Rat > RAT -> true
Rat == RAT -> false
Rat != RAT -> true
Rat <= RAT -> false
Rat >= RAT -> true
Comparing 'Rat' and 'RAT', case insensitively:
Rat < RAT -> false
Rat > RAT -> false
Rat == RAT -> true
Rat != RAT -> false
Rat <= RAT -> true
Rat >= RAT -> true
Comparing '1100' and '200', case sensitively:
1100 < 200 -> true
1100 > 200 -> false
1100 == 200 -> false
1100 != 200 -> true
1100 <= 200 -> true
1100 >= 200 -> false
</pre>
=={{header|zkl}}==
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