{"action":"created","comment":{"url":"https://api.github.com/repos/palantir/plottable/pulls/comments/30574219","id":30574219,"diff_hunk":"@@ -2,32 +2,27 @@\n \n module Plottable {\n export module Utils {\n-  /**\n-   * An associative array that can be keyed by anything (inc objects).\n-   * Uses pointer equality checks which is why this works.\n-   * This power has a price: everything is linear time since it is actually backed by an array...\n-   */\n   export class Map<K, V> {\n-    private _keyValuePairs: any[][] = [];\n+    private _keyValuePairs: { key: K; value: V; }[] = [];\n \n     /**\n-     * Set a new key/value pair in the store.\n+     * Set a new key/value pair in the Map.\n      *\n-     * @param {K} key Key to set in the store\n-     * @param {V} value Value to set in the store\n-     * @return {boolean} True if key already in store, false otherwise\n+     * @param {K} key Key to set in the Map\n+     * @param {V} value Value to set in the Map\n+     * @return {boolean} True if key already in Map, false otherwise\n      */\n     public set(key: K, value: V) {\n       if (key !== key) {\n         throw new Error(\"NaN may not be used as a key to the Map\");\n       }\n       for (var i = 0; i < this._keyValuePairs.length; i++) {\n-        if (this._keyValuePairs[i][0] === key) {\n-          this._keyValuePairs[i][1] = value;\n+        if (this._keyValuePairs[i].key === key) {","path":"src/utils/map.ts","position":31,"original_position":31,"commit_id":"4dc41334a38a6ab473690827d7988d48ad5cf03d","original_commit_id":"4dc41334a38a6ab473690827d7988d48ad5cf03d","user":{"login":"bluong","id":1448299,"avatar_url":"https://avatars.githubusercontent.com/u/1448299?v=3","gravatar_id":"","url":"https://api.github.com/users/bluong","html_url":"https://github.com/bluong","followers_url":"https://api.github.com/users/bluong/followers","following_url":"https://api.github.com/users/bluong/following{/other_user}","gists_url":"https://api.github.com/users/bluong/gists{/gist_id}","starred_url":"https://api.github.com/users/bluong/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/bluong/subscriptions","organizations_url":"https://api.github.com/users/bluong/orgs","repos_url":"https://api.github.com/users/bluong/repos","events_url":"https://api.github.com/users/bluong/events{/privacy}","received_events_url":"https://api.github.com/users/bluong/received_events","type":"User","site_admin":false},"body":"Shouldn't this be `this._keyValuePairs[i][key]`?  Wouldn't this look up the wrong entry in the pairs?","created_at":"2015-05-19T07:17:00Z","updated_at":"2015-05-19T07:17:00Z","html_url":"https://github.com/palantir/plottable/pull/2100#discussion_r30574219","pull_request_url":"https://api.github.com/repos/palantir/plottable/pulls/2100","_links":{"self":{"href":"https://api.github.com/repos/palantir/plottable/pulls/comments/30574219"},"html":{"href":"https://github.com/palantir/plottable/pull/2100#discussion_r30574219"},"pull_request":{"href":"https://api.github.com/repos/palantir/plottable/pulls/2100"}}},"pull_request":{"url":"https://api.github.com/repos/palantir/plottable/pulls/2100","id":35698291,"html_url":"https://github.com/palantir/plottable/pull/2100","diff_url":"https://github.com/palantir/plottable/pull/2100.diff","patch_url":"https://github.com/palantir/plottable/pull/2100.patch","issue_url":"https://api.github.com/repos/palantir/plottable/issues/2100","number":2100,"state":"open","locked":false,"title":"Improve typing on the map shim.","user":{"login":"jtlan","id":1440449,"avatar_url":"https://avatars.githubusercontent.com/u/1440449?v=3","gravatar_id":"","url":"https://api.github.com/users/jtlan","html_url":"https://github.com/jtlan","followers_url":"https://api.github.com/users/jtlan/followers","following_url":"https://api.github.com/users/jtlan/following{/other_user}","gists_url":"https://api.github.com/users/jtlan/gists{/gist_id}","starred_url":"https://api.github.com/users/jtlan/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/jtlan/subscriptions","organizations_url":"https://api.github.com/users/jtlan/orgs","repos_url":"https://api.github.com/users/jtlan/repos","events_url":"https://api.github.com/users/jtlan/events{/privacy}","received_events_url":"https://api.github.com/users/jtlan/received_events","type":"User","site_admin":false},"body":"`keys()` and values() used to return `<any>`, which wasn't very helpful.\r\n\r\nOn a `Map<K, V>`, `keys()` now returns `K[]`, 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