Converts a list of objects to a Markdown table

toMarkdownTable.js

export const toMarkdownTable = (keys = null) => (list) => {

	if (list == null) throw new Error('The list needs to be an array');

	if (list.length === 0) return '';

	keys = keys || Object.keys(list[0]);

	if (keys.length === 0) return '';

	headers = toMarkdownHeaders(keys);

	body = list.map(obj => toMarkdownRow(obj, keys)).join('\n');

	return headers + '\n' + body;
};

const toMarkdownHeaders = (headers) => {

	let columnHeaders = [];
	let underlines = [];

	for (const header of headers) {

		columnHeaders.push(`${header}`);
		underlines.push(''.padEnd(header.length, '-'));
	}

	return `| ${columnHeaders.join(' | ')} |\n|-${underlines.join('-|-')}-|`;
};

const toMarkdownRow = (obj, keys) => {
	let output = [];

	for (const key of keys) {
		output.push(obj[key]);
	}

	return `| ${output.join(' | ')} |`;
};