inexorabletash

// http://cautionsingularityahead.blogspot.com/2012/07/resource-using-in-javascript.html

// Say you have a heavy-weight resource that you can explicitly finalize - either through
// some API or just by dropping a reference when you're done even if you want to hold onto
// the wrapper:
function Resource(a) {
  var res = "a resource of " + a;

  this.get = function() {
    return res;

inexorabletash

# Custom prompt
function prompt {
  write-host -NoNewLine -ForegroundColor Red $pwd 

  # Current git branch name
  $branch = git rev-parse --abbrev-ref HEAD
  if ($branch) {
    write-host -NoNewLine -ForegroundColor Green (' [' + $branch + ']')
  }

inexorabletash

Moved to: https://github.com/inexorabletash/indexeddb-promises

... to support more fine-grained commenting and collaboration.

inexorabletash

STATUS: Obsolete - see this updated proposal instead.

Extend IDBDatabase with:

interface IDBDatabase {
  IDBExplicitTransaction explicitTransaction(scope, mode);
};

inexorabletash

Transactionless Indexed DB

Status: Initial thought experiment. Feedback welcome.

There are times when Indexed DB's transaction-centric API is too heavyweight:

• Reading a single value
• Writing a single value
• Using some other locking mechanism
• Writing, and want immediate commit (see also: Indexed DB: Fast Commit)

inexorabletash

// Copyright 2019 Google LLC.
// SPDX-License-Identifier: Apache-2.0

var name = 'db' + Date.now();
var openReq = indexedDB.open(name, 1);
openReq.onupgradeneeded = function() {
  var db = openReq.result;
  var store = db.createObjectStore('store');
  for (var i = 0; i < 100; i += 10)
    store.put("record-" + i, i);

inexorabletash

 ║ ═ ╔ ╗ ╚ ╝ ╠ ╣ ╦ ╩ ╬  -- normal
 │ ─ ┌ ┐ └ ┘ ├ ┤ ┬ ┴ ┼  -- infested

Save the Marines:
        ╔═╦╦═╦╦═╗╔═╦╦═╗
        ╠╗╠╬═╝╚╦╩╣╔╝╚╗╚╗
        ║║║╚╗╔╦╝╔╬╝╔═╬═╝
        ╚╝╚═╩╝╚═╣╚═╣╔╩╦╗
                ║╔╗║╚╦╝║

inexorabletash

Following proposal by @littledan

THIS NO LONGER MATCHES THE PROPOSED API AND SHOULD NOT BE USED

• Proposal
• Slides

Just proof-of-concept. Do not use in production.

Caveats:

inexorabletash

Indexed DB - N-Dimensional Selection (V2)

This is a redo of the solution over in Indexed DB - N-Dimensional Selection but with a revised "API". The sample here takes a query in the form of an array of IDBKeyRange instances (or null), e.g.

select(index, [IDBKeyRange.bound(5, 7), null, IDBKeyRange.lowerBound(15000)], callback, complete);

inexorabletash

IndexedDB with Promises

This is a hacky prototype of what IDB-on-Promises could look like.

STATUS: See this updated proposal instead.

See also:

https://github.com/slightlyoff/Promises/tree/master/historical_interest/reworked_APIs/IndexedDB