string map question

[subarashii]

Hi there,

I have a question regarding the string map command. What i understand so far: In general you have to set up pairs of words which are replaced by their counterparts. So in this example "not" and "script" is being replaced to "good" and "tcl script".

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set mytext "i am a not working script"

set nword [string map -nocase {
 "not" "good"
"script" "tcl script"
} $mytext];
putmsg $chan "$nword";

.. and so on

This example works fine. But if i try to insert string variables like lets say:

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set string_one "not"
set string_two "good"

set nword [string map -nocase {
 $string_one $string_two
} $mytext];

Well my noobish version does not work Manual pages says this:

Replaces substrings in string based on the key-value pairs in mapping. mapping is a list of key value key value ... as in the form returned by array get.

I tried some variations resulting in not replacing the string or in inbalance char maps. Can someone drop me a quick feedback how to solve this?

tnx in advance

[nml375]

The reason why the second version does not work, is that you provide the two strings as separate arguments, whereas the documentation clearly specifies that string map expects <map> to be a (single argument) list with value pairs.

Use this instead:

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set nword [string map -nocase [list $string_one $string_two] $mytext];

I would also suggest using the list-command whenever you build a list from strings; ie:

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set nword [string map -nocase [list "not" "good" "script" "tcl script"] $mytext]

[subarashii]

tnx a lot. It works now. The list-command was the problem. TCL syntax still confuses me a lot.

[Sir_Fz]

When you create lists using {} everything between the braces won't be evaluated, which means all Tcl commands and variables will be treated as normal strings or elements inside the list.

• does the same thing (creates a list), but everything after
  • will be evaluated thus you can use variables and commands in it.