Function d3_format_precision

explainshell/web/static/js/d3.v3.js:1984–1986

(x, p)

    }
  });
  function d3_format_precision(x, p) {
    return p - (x ? Math.ceil(Math.log(x) / Math.LN10) : 1);
  }
  function d3_format_typeDefault(x) {
    return x + "";
  }