Runtime evaluation: Difference between revisions
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Capra Hircus (talk | contribs) (adding maxima) |
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typeof bar; // 'string' |
typeof bar; // 'string' |
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</lang> |
</lang> |
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=={{header|Maxima}}== |
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<lang maxima>/* Here is how to create a function and return a value at runtime. In the first example, |
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the function is made global, i.e. it still exists after the statement is run. In the second example, the function |
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is declared local. The evaluated string may read or write any variable defined before eval_string is run. */ |
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kill(f)$ |
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eval_string("block(f(x) := x^2 + 1, f(2))"); |
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5 |
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fundef(f); |
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/* f(x) := x^2 + 1 */ |
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eval_string("block([f], local(f), f(x) := x^3 + 1, f(2))"); |
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9 |
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fundef(f); |
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/* f(x) := x^2 + 1 */</lang> |
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=={{header|ooRexx}}== |
=={{header|ooRexx}}== |
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The ooRexx INTERPRET instruction allows execution of dynamically constructed code. Almost any well-formed code can be executed dynamically, including multiple instructions at a time. The instructions are executed in the local context where the interpret instruction executes, so full access to the current variable context is available. For example: |
The ooRexx INTERPRET instruction allows execution of dynamically constructed code. Almost any well-formed code can be executed dynamically, including multiple instructions at a time. The instructions are executed in the local context where the interpret instruction executes, so full access to the current variable context is available. For example: |
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