Runtime evaluation/In an environment: Difference between revisions
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m (→{{header|PHP}}: php var inside functions, if not declared global, are local; should the code be "splitted" as done for tcl? waiting feedback) |
(→{{header|Metafont}}: if the problem was the "global" variable... fixed (as tcl, similar to php)) |
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=={{header|Metafont}}== |
=={{header|Metafont}}== |
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<lang metafont>vardef evalit(expr s, v) = |
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{{incorrect|Metafont|Either do not use a global variable, or note that this is impossible.}} |
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enddef; |
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a := evalit("2x+1", 5); |
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<lang metafont>string p; |
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b := evalit("2x+1", 2); |
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show (a-b); |
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x := 5; |
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end</lang> |
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message decimal a; % 11 |
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x := 2; |
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b := scantokens p; |
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message decimal b; % 5</lang> |
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=={{header|Octave}}== |
=={{header|Octave}}== |
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