Control Structures: Difference between revisions
imported>Dj d |
imported>Dj d |
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| Line 35: | Line 35: | ||
For example: | For example: | ||
boolean [int][string] map; | |||
boolean [int][string] map; | map[15]["test"] = true; | ||
map[15]["test"] = true; | foreach int_index in map | ||
foreach int_index in map | { | ||
{ | |||
print(int_index); //this will print '15' once, since there is only one valid value for this index | print(int_index); //this will print '15' once, since there is only one valid value for this index | ||
foreach string_index in map[int_index] //this iterates over the "slice" of the map where 1 is fixed as the index | foreach string_index in map[int_index] //this iterates over the "slice" of the map where 1 is fixed as the index | ||
| Line 46: | Line 45: | ||
print(map[int_index][string_index]); //this will print "true" | print(map[int_index][string_index]); //this will print "true" | ||
} | } | ||
} | } | ||
So the output is | So the output is | ||
15 | 15 | ||
Revision as of 18:11, 3 October 2009
if/else
if (boolean)
{}
else if (boolean)
{}
else
{}
while
while (boolean)
{}
repeat until
repeat {} until (boolean)
for
for x from a to b by c
is the general case. You don't need to specify whether it's going up or down - although doing so by using upto or downto does allow a runtime check to make sure you didn't screw up.
If you don't specify "c", it defaults to incrementing/decrementing by 1. The first iteration is at a and the last is at b (that is to say, it goes from a to b, inclusive).
foreach
foreach x in map
{}
"map" must be an aggregate - a map or a slice. x takes on each value of the map index in turn. If there is more than one index, x iterates over the first index.
For example:
boolean [int][string] map;
map[15]["test"] = true;
foreach int_index in map
{
print(int_index); //this will print '15' once, since there is only one valid value for this index
foreach string_index in map[int_index] //this iterates over the "slice" of the map where 1 is fixed as the index
{
print(string_index); //This will print "test" once, since there is only one valid value for this index
print(map[int_index][string_index]); //this will print "true"
}
}
So the output is 15 test true
See http://kolmafia.sourceforge.net/advanced.html#maps for details.