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Javascript – How to count markdown tables with a given text?

code should be something like this:

const mdtext = `some blabla text
Here is a table:

| a | b |
|---|---|
| 1 | 2 |
| ^ | 3 |

more text outside

Here goes another table

| apples | oranges | bananas |
|--------|---------|---------|
| 11 | 24 | 22 |
| 84 | 32 | 23 |

- some bullets
- more bullets


`;

const count = countTables(mdtext)
console.log(count); // it should output 2

This regex https://stackoverflow.com/a/29616512/865220 matches single header only, I need with multiple.

Tags:

2

Answers


  1. Chosen as BEST ANSWER
    0

    I have found a non-regex way to do it, It uses remark and rehype libraries.

    import rehypeSanitize from 'rehype-sanitize'
import rehypeStringify from 'rehype-stringify'
import remarkParse from 'remark-parse'
import remarkRehype from 'remark-rehype'
import { unified } from 'unified'

function countTables(fileContent) {
  const file = await unified()
    .use(remarkParse)
    .use(remarkRehype)
    .use(rehypeSanitize)
    .use(rehypeStringify)
    .parse(fileContent)

  const elems = file.children
  let count = 0
  for (let i = 0; i < elems.length; i++) {
    if (elems[i].type == 'paragraph') {
      if (elems[i].children.length == 1) {
        if (elems[i].children[0].type == 'text') {
          const line0 = elems[i].children[0].value.trim().split('n')[0]
          if (line0[0] == '|' && line0[line0.length - 1] == '|') {
            count = count + 1;
          }
        }
      } else if (elems[i].children.length >= 3) {
        if (
          elems[i].children[0].type == 'text' &&
          elems[i].children[1].type == 'break' &&
          elems[i].children[2].type == 'text'
        ) {
          const line0 = elems[i].children[0].value.trim().split('n')[0].trim()
          if (line0[0] == '|' && line0[line0.length - 1] == '|') {
            count = count + 1;
          }
        }
      }
    }
  }
  return count
}

  2. 0

    For your sample data, I would suggest the following regex:

    ^(?:[ t]*|(?:.+?|)+[ t]*(?:[rn]|$))+.

    Check it on regex101.

    An explanation using artificial intelligence can be found here.

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