Comparison of programming languages (associative array): Difference between revisions

Revision as of 04:05, 9 September 2017

Revision as of 11:28, 8 November 2017

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=== [[Tcl]] ===

There are two Tcl facilities that support associative array semantics. An array is a collection of ''variables''. A '''dict''' is a full implementation of associative arrays.

array is a collection of ''variables''. A '''dict''' is a full implementation

of associative arrays.

'''dict'''

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</source>

To lookuplook up an item:

<source lang=Tcl>

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</source>

If there is a literal space character in the variable name, it must be grouped using either curly brackets (no substitution performed) or double quotes (substitution is performed).

grouped using either curly brackets (no substitution performed) or double

quotes (substitution is performed).

Alternatively, several array elements can be set in a single command by providing their mappings as a list (words containing whitespace are braced):

providing their mappings as a list (words containing whitespace are braced):

<source lang=Tcl>

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</source>

The result can be (order of keys is unspecified, not because the dictionary is unordered, but because the array is):

unordered, but because the array is):

<source lang=Tcl>