mirror of https://github.com/thangisme/notes.git
47 lines
1.0 KiB
JavaScript
47 lines
1.0 KiB
JavaScript
(function() {
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var brackets, last;
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last = function(array) {
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return array[array.length - 1];
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};
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brackets = {
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parse: function(str) {
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var current, j, len, stack, sym;
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current = [''];
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stack = [current];
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for (j = 0, len = str.length; j < len; j++) {
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sym = str[j];
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if (sym === '(') {
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current = [''];
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last(stack).push(current);
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stack.push(current);
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} else if (sym === ')') {
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stack.pop();
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current = last(stack);
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current.push('');
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} else {
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current[current.length - 1] += sym;
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}
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}
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return stack[0];
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},
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stringify: function(ast) {
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var i, j, len, result;
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result = '';
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for (j = 0, len = ast.length; j < len; j++) {
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i = ast[j];
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if (typeof i === 'object') {
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result += '(' + brackets.stringify(i) + ')';
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} else {
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result += i;
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}
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}
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return result;
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}
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};
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module.exports = brackets;
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}).call(this);
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