43 lines
895 B
Tcl
43 lines
895 B
Tcl
# Heap Allocation with `@`
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func main():
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# By default, values in Tomo are immutable.
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# To allow mutation, you need to allocate memory using `@`
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nums := @[1, 2, 3]
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nums[1] = 99
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>> nums
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= @[???, 2, 3]
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nums:insert(40)
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>> nums
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= @[???, 2, 3, ???]
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# Allocated memory is not equal to other allocated memory:
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a := @[10, 20, 30]
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b := @[10, 20, 30]
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>> a == b
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= ???
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# The `[]` operator can be used to access the value stored
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# at a memory location:
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>> a[] == b[]
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= ???
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# Tables also require `@` to allow modifications:
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scores := @{"Alice"=100, "Bob"=200}
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scores["Charlie"] = 300
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>> scores["Charlie"]
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= ???
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# Without `@`, attempting to mutate will cause an error:
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frozen := {"key"="value"}
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frozen["key"] = "new value" # <- This will break, comment it out
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>> frozen["key"]
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= "value"?
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