String comparison: Difference between revisions
Add Ecstasy example
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=={{header|Ecstasy}}==
In Ecstasy, strings are objects, like all values. Any class, including classes like <code>Int</code> and <code>String</code>, can provide operator support by annotating the methods that represent those operators. The result is simple uniformity of how types are defined, including their operators. String comparisons rely on these operators:
<syntaxhighlight lang="ecstasy">
module StringComparisons {
void run() {
@Inject Console console;
import ecstasy.collections.CaseInsensitive;
String[] tests = ["dog", "cat", "Dog"];
String s1 = tests[0];
for (String s2 : tests) {
// Comparing two strings for exact equality
if (s1 == s2) {
console.print($"{s1} == {s2}");
}
// Comparing two strings for inequality
if (s1 != s2) {
console.print($"{s1} != {s2}");
}
// Comparing two strings to see if one is lexically ordered
// before the other
if (s1 < s2) {
console.print($"{s1} < {s2}");
}
// Comparing two strings to see if one is lexically ordered
// after the other
if (s1 > s2) {
console.print($"{s1} > {s2}");
}
// How to achieve both case sensitive comparisons and case
// insensitive comparisons within the language
if (CaseInsensitive.areEqual(s1, s2)) {
console.print($"{s1} == {s2} (case-insensitive)");
} else {
console.print($"{s1} != {s2} (case-insensitive)");
}
switch (CaseInsensitive.compare(s1, s2)) {
case Lesser:
console.print($"{s1} < {s2} (case-insensitive)");
break;
case Equal:
// already covered this one above
assert CaseInsensitive.areEqual(s1, s2);
break;
case Greater:
console.print($"{s1} > {s2} (case-insensitive)");
break;
}
}
}
}
</syntaxhighlight>
{{out}}
<pre>
dog == dog
dog == dog (case-insensitive)
dog != cat
dog > cat
dog != cat (case-insensitive)
dog > cat (case-insensitive)
dog != Dog
dog > Dog
dog == Dog (case-insensitive)
</pre>
=={{header|Elena}}==
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Case insensitive comparisons can be achieved by converting both strings to the same case before the comparisons are made.
<syntaxhighlight lang="
var compareStrings = Fn.new { |a, b, sens|
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