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Using Nasal functions: Difference between revisions
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→Functional programming, higher order functions, generators (advanced concept)
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Another common technique to "overload" a function is to get a handle to the original function and then re-implement the function at your script's scope, so that calls to settimer/setlistener will automatically invoke your own version of the function, this is explained at [[Developing and debugging Nasal code#Managing timers and listeners]]. | Another common technique to "overload" a function is to get a handle to the original function and then re-implement the function at your script's scope, so that calls to settimer/setlistener will automatically invoke your own version of the function, this is explained at [[Developing and debugging Nasal code#Managing timers and listeners]]. | ||
=== Storing Functions === | |||
Functions can also be easily stored in vector and/or hashes: | |||
<syntaxhighlight lang="php"> | |||
var hash = {}; | |||
hash.hello = func { | |||
print ("Hello !"); | |||
} | |||
var vector = []; | |||
append(vector, func { | |||
print("Hello !"); | |||
}); | |||
## | |||
# call the functions: | |||
## | |||
# the hash call: | |||
hash.hello(); | |||
## | |||
# the vector call: | |||
vector[0](); | |||
</syntaxhighlight> | |||
===Functional programming, higher order functions, generators (advanced concept) === | ===Functional programming, higher order functions, generators (advanced concept) === | ||