How to replace/reset an element value in a TCL array?

Question

Say I have an array in a TCL, and I want to change the value of the element which has a key say "First_elem". How I can do this?

überjesus · Accepted Answer · 2011-04-06 12:01:22Z

5

Just set the array element like any other variable: set myArray(key) "value"

Here's a more complete example:

array set myArray {
    key1 1234
    key2 5678
}

echo $myArray(key1)
set myArray(key1) "test"   // Change an existing element
set myArray(key3) "hello"  // Add a new element
echo $myArray(key1)

answered Apr 6, 2011 at 12:01

überjesus

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4 Comments

Narek Over a year ago

Ok, but if it is a list (the value), can I change one elem in that list without touching the other elements of the list?

überjesus Over a year ago

You can do that with the lreplace (replace an element in a list) function. This would replace the second list element of the key1-value in my example (the value has to be a list of course, which it is not in my example): set myArray(key1) [lreplace $myArray(key1) 1 1 "hello"]

GrAnd Over a year ago

Instead of 'lreplace you can use lset. I.e. lset myArray(key1) 1 "new value".

glenn jackman Over a year ago

echo? Take your shell hat off for a minute ;) Or interp alias "" echo "" puts

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