30 lines
881 B
JavaScript
30 lines
881 B
JavaScript
// Computations resolve to numbers
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// vars is a dict of variables to substitute
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function evaluateComputation(string, vars){
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if (!string) return string;
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// Replace all the string variables with numbers if possible
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let substitutedString = string.replace(
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/\w*[a-z]\w*/gi,
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sub => vars.hasOwnProperty(sub) ? vars[sub] : sub
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);
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// Evaluate the expression to a number or return it as is.
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try {
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return math.eval(substitutedString);
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} catch (e){
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return substitutedString;
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}
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};
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// Strings can have computations in bracers like so: {computation}
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// vars is a dict of variables to substitute
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function evaluateString(string, vars){
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if (!string) return string;
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// Compute everything inside bracers
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return string.replace(/\{([^\{\}]*)\}/g, function(match, p1){
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return evaluateComputation(p1, vars);
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});
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}
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export { evaluateComputation, evaluateString };
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