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#722 - Remove Comments

Medium • View on LeetCode • View on GitHub

Problem Description

Given a C++ program, remove comments from it. The program source is an array where source[i] is the i-th line of the source code. This represents the result of splitting the original source code string by the newline character \n.

In C++, there are two types of comments, line comments, and block comments.

The string // denotes a line comment, which represents that it and rest of the characters to the right of it in the same line should be ignored.

The string /* denotes a block comment, which represents that all characters until the next (non-overlapping) occurrence of should be ignored.

It is guaranteed that every open block comment will eventually be closed, so /* outside of a line or block comment always starts a new comment.

Finally, implicit newline characters can be deleted by block comments.

After removing the comments from the source code, return the source code in the same format.

Solution

/**
 * @param {string[]} source
 * @return {string[]}
 */
var removeComments = function(source) {
  return source.join('\n').replace(/\/\*.*?\*\/|\/\/[^\n]+/gs, '').split(/\n/).filter(Boolean);
};

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