functions.js

function in_array(needle, haystack, argStrict) {
  //  discuss at: http://phpjs.org/functions/in_array/
  // original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
  // improved by: vlado houba
  // improved by: Jonas Sciangula Street (Joni2Back)
  //    input by: Billy
  // bugfixed by: Brett Zamir (http://brett-zamir.me)
  //   example 1: in_array('van', ['Kevin', 'van', 'Zonneveld']);
  //   returns 1: true
  //   example 2: in_array('vlado', {0: 'Kevin', vlado: 'van', 1: 'Zonneveld'});
  //   returns 2: false
  //   example 3: in_array(1, ['1', '2', '3']);
  //   example 3: in_array(1, ['1', '2', '3'], false);
  //   returns 3: true
  //   returns 3: true
  //   example 4: in_array(1, ['1', '2', '3'], true);
  //   returns 4: false

  var key = '',
    strict = !! argStrict;

  //we prevent the double check (strict && arr[key] === ndl) || (!strict && arr[key] == ndl)
  //in just one for, in order to improve the performance 
  //deciding wich type of comparation will do before walk array
  if (strict) {
    for (key in haystack) {
      if (haystack[key] === needle) {
        return true;
      }
    }
  } else {
    for (key in haystack) {
      if (haystack[key] == needle) {
        return true;
      }
    }
  }

  return false;
}

function number_format(number, decimals, dec_point, thousands_sep) {
  //  discuss at: http://phpjs.org/functions/number_format/
  // original by: Jonas Raoni Soares Silva (http://www.jsfromhell.com)
  // improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
  // improved by: davook
  // improved by: Brett Zamir (http://brett-zamir.me)
  // improved by: Brett Zamir (http://brett-zamir.me)
  // improved by: Theriault
  // improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
  // bugfixed by: Michael White (http://getsprink.com)
  // bugfixed by: Benjamin Lupton
  // bugfixed by: Allan Jensen (http://www.winternet.no)
  // bugfixed by: Howard Yeend
  // bugfixed by: Diogo Resende
  // bugfixed by: Rival
  // bugfixed by: Brett Zamir (http://brett-zamir.me)
  //  revised by: Jonas Raoni Soares Silva (http://www.jsfromhell.com)
  //  revised by: Luke Smith (http://lucassmith.name)
  //    input by: Kheang Hok Chin (http://www.distantia.ca/)
  //    input by: Jay Klehr
  //    input by: Amir Habibi (http://www.residence-mixte.com/)
  //    input by: Amirouche
  //   example 1: number_format(1234.56);
  //   returns 1: '1,235'
  //   example 2: number_format(1234.56, 2, ',', ' ');
  //   returns 2: '1 234,56'
  //   example 3: number_format(1234.5678, 2, '.', '');
  //   returns 3: '1234.57'
  //   example 4: number_format(67, 2, ',', '.');
  //   returns 4: '67,00'
  //   example 5: number_format(1000);
  //   returns 5: '1,000'
  //   example 6: number_format(67.311, 2);
  //   returns 6: '67.31'
  //   example 7: number_format(1000.55, 1);
  //   returns 7: '1,000.6'
  //   example 8: number_format(67000, 5, ',', '.');
  //   returns 8: '67.000,00000'
  //   example 9: number_format(0.9, 0);
  //   returns 9: '1'
  //  example 10: number_format('1.20', 2);
  //  returns 10: '1.20'
  //  example 11: number_format('1.20', 4);
  //  returns 11: '1.2000'
  //  example 12: number_format('1.2000', 3);
  //  returns 12: '1.200'
  //  example 13: number_format('1 000,50', 2, '.', ' ');
  //  returns 13: '100 050.00'
  //  example 14: number_format(1e-8, 8, '.', '');
  //  returns 14: '0.00000001'

  number = (number + '')
    .replace(/[^0-9+\-Ee.]/g, '');
  var n = !isFinite(+number) ? 0 : +number,
    prec = !isFinite(+decimals) ? 0 : Math.abs(decimals),
    sep = (typeof thousands_sep === 'undefined') ? ',' : thousands_sep,
    dec = (typeof dec_point === 'undefined') ? '.' : dec_point,
    s = '',
    toFixedFix = function(n, prec) {
      var k = Math.pow(10, prec);
      return '' + (Math.round(n * k) / k)
        .toFixed(prec);
    };
  // Fix for IE parseFloat(0.55).toFixed(0) = 0;
  s = (prec ? toFixedFix(n, prec) : '' + Math.round(n))
    .split('.');
  if (s[0].length > 3) {
    s[0] = s[0].replace(/\B(?=(?:\d{3})+(?!\d))/g, sep);
  }
  if ((s[1] || '')
    .length < prec) {
    s[1] = s[1] || '';
    s[1] += new Array(prec - s[1].length + 1)
      .join('0');
  }
  return s.join(dec);
}