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Howto:Start using vectors and hashes in Nasal: Difference between revisions
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Howto:Start using vectors and hashes in Nasal (view source)
Revision as of 21:27, 9 February 2012
, 9 February 2012no edit summary
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</syntaxhighlight> | </syntaxhighlight> | ||
To do this using a conventional for loop, you would use the size() function to get the size of the vector: | |||
<syntaxhighlight lang="php"> | <syntaxhighlight lang="php"> | ||
var waypoints = ["wp1","wp2","wp3","wp4","wp5"]; | var waypoints = ["wp1","wp2","wp3","wp4","wp5"]; | ||
foreach(var wpt; waypoints) | for(var index; index < size(waypoints); index=index+1) { | ||
print(waypoints[index]); | |||
} | |||
</syntaxhighlight> | |||
Now, waypoints being a vector, we can also use a simple foreach loop, that works without a counter, to process each element easily: | |||
<syntaxhighlight lang="php"> | |||
var waypoints = ["wp1","wp2","wp3","wp4","wp5"]; | |||
foreach(var wpt; waypoints) { | |||
print(wpt); | print(wpt); | ||
} | |||
</syntaxhighlight> | </syntaxhighlight> | ||
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== A vector based version == | == A vector based version == | ||
One simple way to accomplish this is using a another vector for each waypoint, nested inside the original vector. So that we end up with a two-dimensional data structure. For example, imagine a folder containing sub folders, with folders not having names but rather indices. | One simple way to accomplish this is using a another vector for each waypoint, nested inside the original vector. So that we end up with a two-dimensional data structure. For example, imagine a folder containing sub folders, with folders not having names but rather indices (numbers). | ||
<syntaxhighlight lang="php"> | <syntaxhighlight lang="php"> | ||