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Array.make - transforms list-like data structures into native arrays

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Two versions of an **{{Array.make}}** method that handles list-like data structures such as **{{[HTMLCollection]}}**{{s}} / **{{[NodeList]}}**{{s}}, **{{[String]}}**{{s}} or **{{[arguments]}}** -arrays turning them into native array objects.

This firstly implemented version creates an {{Array.make}} that will throw a **{{[TypeError]}}** if it got passed invalid arguments whereas the latter in that case will fail silently.

{{Array.make}} throwing a {{[TypeError]}}:

[code=javascript]Array.make = (function () {

var make, arr, str,
  all = (document.getElementsByTagName && document.getElementsByTagName("*")),
  slice = Array.prototype.slice,
  exposeImplementation = Object.prototype.toString,
  isString = (function () {

var regXBaseClass = (/^\[object\s+String\]$/);
    return (function (obj/*:[object|value]*/) {

return regXBaseClass.test(exposeImplementation.call(obj));
    });
  })(),
  isArray = (function () {

var regXBaseClass = (/^\[object\s+Array\]$/);
    return (function (obj/*:[object|value]*/) {

return regXBaseClass.test(exposeImplementation.call(obj));
    });
  })();

try {

arr = slice.call(all); // [NodeList|HTMLCollection] test. // msie fails.

arr = slice.call(arguments); // [Array:arguments] test.
    str = arr.join("");
    if ((arr.length != 3) || (str != "Array.make")) {
      throw (new Error);
    }

arr = slice.call(str); // [String] test. // opera and msie fail.
    if ((arr.length !== 10) || (arr[5] !== ".")) {
      throw (new Error);
    }

make = (function (list) {

var arr, len = ((list || isString(list)) && list.length);
      if ((typeof len == "number") && isFinite(len)) { // detect invalid list structures.

arr = (slice.call(list) || (new Array(len)));
      } else {
        throw (new TypeError("1st argument needs to be some kind of list."));
      }
      return (arr || list); // (arr || []); // (arr || [list]); // there might be a debate on it.
    });
    delete isArray;

} catch (err) {

make = (function (list) {

var len, arr = ((isString(list) && list.split("")) || (isArray(list) && slice.call(list)) || arr); // [String] and [Array] test shortcut.
      if (!arr) {
        len = ((list !== 0) && list && list.length); // prevents passing zero as an argument.
        if ((typeof len == "number") && isFinite(len)) { // detect invalid list structures.

arr = new Array(len);

return make;

})("Array", ".", "make");[/code]

{{Array.make}} failing silently:

[code=javascript]Array.make = (function () {

var regXBaseClass = (/^\[object\s+String\]$/);
    return (function (obj/*:[object|value]*/) {

return regXBaseClass.test(exposeImplementation.call(obj));
    });
  })(),
  isArray = (function () {

var regXBaseClass = (/^\[object\s+Array\]$/);
    return (function (obj/*:[object|value]*/) {

return regXBaseClass.test(exposeImplementation.call(obj));
    });
  })();

try {

arr = slice.call(all); // [NodeList|HTMLCollection] test. // msie fails.

arr = slice.call(arguments); // [Array:arguments] test.
    str = arr.join("");
    if ((arr.length != 3) || (str != "Array.make")) {
      throw (new Error);
    }

arr = slice.call(str); // [String] test. // opera and msie fail.
    if ((arr.length !== 10) || (arr[5] !== ".")) {
      throw (new Error);
    }

make = (function (list) {

var len = ((list || isString(list)) && list.length);
      return (((typeof len == "number") && isFinite(len) && (slice.call(list) || (new Array(len)))) || list); // ( ... || []); // ( ... || [list]); // there might be a debate on it.
    });
    delete isArray;

} catch (err) {

make = (function (list) {

arr = new Array(len);

var i = 0, elm;
          while (i < len) {
            elm = (/*(list.charAt && list.charAt(i)) || */(list.item && list.item(i)) || list[i]); // [String|string].charAt is not necessary anymore.
            if ((typeof elm != "undefined") || (i in list)) {
              arr[i] = elm;
            }
            ++i;
          }
        }
      }
      return (arr || list); // (arr || []); // (arr || [list]); // there might be a debate on it.
    });
  }
  delete arr; delete str; delete all;

return make;

})("Array", ".", "make");[/code]

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