multiple values to a key in tcl array

Question

Ho do I specify multiple values to a key in Tcl associative array?

set A(a) val1
set A(a) val2

This is overriding the value and, on printing, I get the last value. How to store and to retrieve both of them?

Jerry · Accepted Answer · 2019-03-03 14:34:08Z

2

You could store the values in a list, and store that list into the array:

set A(a) [list val1]
lappend A(a) val2
puts $A(a)
# val1 val2

answered Mar 3, 2019 at 14:34

Jerry

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2 Comments

Donal Fellows Over a year ago

This is the standard way to do this, and that's true across many languages (after allowing for syntax and so on).

Schelte Bron Over a year ago

Note: There is no need to use a different approach for the first and subsequent elements. You can use lappend for all. The lappend command will behave the same as the set/list combination shown in the code above if the array element does not exist.

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