23 lines
755 B
Plaintext
23 lines
755 B
Plaintext
x = <<>>; // create an empty list
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x.hello = 1;
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x.world = 2;
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x.["!"] = 3;
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// to iterate over identifiers of a list one needs to use the function ''members''
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// the identifiers are returned as a lexicographically ordered string row-vector
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// here ["!", "hello", "world"]
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for(i in members(x))
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{ printf("%s %g\n", i, x.[i]); }
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// occasionally one needs to check if there exists member of a list
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y = members(x); // y contains ["!", "hello", "world"]
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clear(x.["!"]); // remove member with identifier "!" from the list "x"
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for(i in y)
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{ printf("%s %g\n", i, x.[i]); } // this produces error because x.["!"] does not exist
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for(i in y)
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{
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if (exist(x.[i]))
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{ printf("%s %g\n", i, x.[i]); } // we print a member of the list "x" only if it exists
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}
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