Pointers and references: Difference between revisions
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Accessing another object of the array through the reference: |
Accessing another object of the array through the reference: |
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v = (&ref)[3]; // read value of array[3]; however doing this is bad style |
v = (&ref)[3]; // read value of array[3]; however doing this is bad style |
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==[[Tcl]]== |
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Tcl does not have pointers, however if required a similar level of indirection can be had by storing a variable name in another variable, eg. |
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set var 3 |
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set pointer var; # assign name "var" not value 3 |
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set pointer; # returns "var" |
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set $pointer; # returns 3 |
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set $pointer 42; # variable var now has value 42 |
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In practice it's safer and more convenient to use array keys, eg. |
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set arr(var) 3 |
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set pointer var |
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set arr($pointer); # returns 3 |
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set arr($pointer) 42; # arr(var) now has value 42 |
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