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

Revision as of 21:19, 31 July 2020

Revision as of 21:53, 31 July 2020

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=== PostScript ===

In [[PostScript]], associative arrays are called dictionaries. In Level 1 PostScript they must be created explicitly, but Level 2 introduced direct declaration using thea double-braceangled-bracket syntax:

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% Both methods leave the dictionary on the operand stack

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Dictionaries can be accessed directly, using '''<code>get'''</code>, or implicitly, by placing the dictionary on the dictionary stack using '''<code>begin'''</code>:

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Dictionary contents can be iterated through using '''<code>forall'''</code>, though not in any particular order:

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>> {exch =print ( is ) print ==} forall

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MayWhich wellmay output:

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That is 2

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Dictionaries can be augmented (up to their defined size only in Level 1) or altered using '''<code>put'''</code>, and entries can be removed using '''<code>undef'''</code>:

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% define a dictionary for easy reuse: