Remove items from Dictionary

bellecombe · Sep 19, 2019

Hi
I need to remove some entries from dict, based on pattern i.e.:
[pre]set keyValueMap [dict create "WidgetTEXT" "T" "WidgetPASSWORD" "P" "defValuesDEFAULTS" "DEFAULT" "defValuesRDB" "R"]
set keyValueMap [dict remove $keyValueMap [join [dict keys $keyValueMap "Widget*"]]]
[/pre]
Although [tt][join [dict keys $keyValueMap "Widget*"][/tt] returns [tt]WidgetTEXT WidgetPASSWORD[/tt], this doesn't works;
instead when hard coded: [tt]set keyValueMap [dict remove $keyValueMap WidgetTEXT WidgetPASSWORD][/tt] works.
What is my mistake?

best regards

xwb · Sep 19, 2019

This is taken as a whole string

Code:

join [dict keys $keyValueMap "Widget*"]

It is like issuing

Code:

set keyValueMap [dict remove $keyValueMap "WidgetTEXT WidgetPASSWORD"]

The string needs to be split into its individual components using {*}

Code:

set keyValueMap [dict remove $keyValueMap {*}[join [dict keys $keyValueMap "Widget*"]]]

bellecombe · Sep 19, 2019

Tanks xwb, I wasn't aware of the expansion operator.
best regards

xwb · Sep 20, 2019

Actually, come to think of it, you don't really need the join. This will also work

Code:

set keyValueMap [dict remove $keyValueMap {*}[dict keys $keyValueMap "Widget*"]]

bellecombe · Sep 20, 2019

Thanks, I already tried it without the join and saw that it works.

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Remove items from Dictionary

bellecombe

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xwb

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bellecombe

Instructor

xwb

Programmer

bellecombe

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