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Make shim-array.js less breaking world around #173

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61 changes: 34 additions & 27 deletions shim-array.js
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Original file line number Diff line number Diff line change
Expand Up @@ -17,40 +17,47 @@ module.exports = Array;
var array_splice = Array.prototype.splice;
var array_slice = Array.prototype.slice;

Array.empty = [];
if (!Array.empty) {
Array.empty = [];

if (Object.freeze) {
Object.freeze(Array.empty);
if (Object.freeze) {
Object.freeze(Array.empty);
}
}

Array.from = function (values) {
var array = [];
array.addEach(values);
return array;
};
if (!Array.from) {
// Does not compatible with iterators
Array.from = function (values) {
var array = [];
array.addEach(values);
return array;
};
}

Array.unzip = function (table) {
var transpose = [];
var length = Infinity;
// compute shortest row
for (var i = 0; i < table.length; i++) {
var row = table[i];
table[i] = row.toArray();
if (row.length < length) {
length = row.length;
if (!Array.unzip) {
Array.unzip = function (table) {
var transpose = [];
var length = Infinity;
// compute shortest row
for (var i = 0; i < table.length; i++) {
var row = table[i];
table[i] = row.toArray();
if (row.length < length) {
length = row.length;
}
}
}
for (var i = 0; i < table.length; i++) {
var row = table[i];
for (var j = 0; j < row.length; j++) {
if (j < length && j in row) {
transpose[j] = transpose[j] || [];
transpose[j][i] = row[j];
for (var i = 0; i < table.length; i++) {
var row = table[i];
for (var j = 0; j < row.length; j++) {
if (j < length && j in row) {
transpose[j] = transpose[j] || [];
transpose[j][i] = row[j];
}
}
}
}
return transpose;
};
return transpose;
};
}

function define(key, value) {
Object.defineProperty(Array.prototype, key, {
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