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Loops/Wrong ranges: Difference between revisions
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Range(0, 0, 0) -> [0 0 0 0 0 0 0 0 0 0]
</pre>
=={{header|Huginn}}==
[https://huginn.org/ Huginn] has the Range generator in Algorithms package.
Instantiation of an a priori invalid range is a fatal error.
<lang huginn>import Algorithms as algo;
class Example {
_start = none;
_stop = none;
_step = none;
_comment= none;
}
main() {
examples = [
Example( -2, 2, 1, "Normal" ),
Example( 2, 2, 0, "Start equal stop: zero increment" ),
Example( 0, 0, 0, "Start equal stop equal zero: zero increment" ),
Example( 2, 2, 1, "Start equal stop: positive increment" ),
Example( 2, 2, -1, "Start equal stop: negative increment" ),
Example( -2, 2, 10, "First increment is beyond stop value" ),
Example( -2, 2, 0, "Zero increment, stop greater than start" ),
Example( -2, 2, -1, "Increments away from stop value" ),
Example( 2, -2, 1, "Start more than stop: positive increment" )
];
for ( ex : examples ) {
print(
"{}\nRange( {}, {}, {} ) -> ".format(
ex._comment, ex._start, ex._stop, ex._step
)
);
r = algo.range( ex._start, ex._stop, ex._step );
print(
"{}\n\n".format(
algo.materialize( algo.slice( r, 22 ), list )
)
);
}
}</lang>
{{out}}
<pre>Normal
Range( -2, 2, 1 ) -> [-2, -1, 0, 1]
Start equal stop: zero increment
Range( 2, 2, 0 ) -> []
Start equal stop equal zero: zero increment
Range( 0, 0, 0 ) -> []
Start equal stop: positive increment
Range( 2, 2, 1 ) -> []
Start equal stop: negative increment
Range( 2, 2, -1 ) -> []
First increment is beyond stop value
Range( -2, 2, 10 ) -> [-2]
Zero increment, stop greater than start
Range( -2, 2, 0 ) -> ./range.hgn:32:17: Invalid range.
Exit 3</pre>
=={{header|Kotlin}}==
Although Kotlin's 'for' statement can deal with a range of integers, the increment must be positive and so it cannot be used for this task. We therefore use instead a 'while' statement to generate the same sequence as a C language 'for' statement would (limited to a maximum of 10 elements as some sequences will be infinite) and wrap it in a function.
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