Function stringify

src/io/csv.js:132–177

(array, options = {}, replacer = v => v)

}

export function stringify (array, options = {}, replacer = v => v) {
  const ctx = Object.create(null);
  ctx.options = options;
  ctx.options.eof = ctx.options.eof !== undefined ? ctx.options.eof : true;
  ctx.row = 1;
  ctx.col = 1;
  ctx.output = '';

  ctx.options.delimiter = ctx.options.delimiter === undefined ? '"' : options.delimiter;
  if(ctx.options.delimiter.length > 1 || ctx.options.delimiter.length === 0)
    throw Error(`CSVError: delimiter must be one character [${ctx.options.separator}]`);

  ctx.options.separator = ctx.options.separator === undefined ? ',' : options.separator;
  if(ctx.options.separator.length > 1 || ctx.options.separator.length === 0)
    throw Error(`CSVError: separator must be one character [${ctx.options.separator}]`);

  const needsDelimiters = new RegExp(`${escapeRegExp(ctx.options.delimiter)}|${escapeRegExp(ctx.options.separator)}|\r\n|\n|\r`);

  array.forEach((row, rIdx) => {
    let entry = '';
    ctx.col = 1;
    row.forEach((col, cIdx) => {
      if (typeof col === 'string') {
        col = col.replace(new RegExp(ctx.options.delimiter, 'g'), `${ctx.options.delimiter}${ctx.options.delimiter}`);
        col = needsDelimiters.test(col) ? `${ctx.options.delimiter}${col}${ctx.options.delimiter}` : col;
      }
      entry += replacer(col, ctx.row, ctx.col);
      if (cIdx !== row.length - 1) {
        entry += ctx.options.separator;
      }
      ctx.col++;
    });
    switch (true) {
      case ctx.options.eof:
      case !ctx.options.eof && rIdx !== array.length - 1:
        ctx.output += `${entry}\n`;
        break;
      default:
        ctx.output += `${entry}`;
        break;
    }
    ctx.row++;
  });

  return ctx.output;
}

function valueEnd (ctx) {
  const value = ctx.options.typed ? inferType(ctx.value) : ctx.value;