brainlid

defmodule MyApp.Books.Book do
  use Ecto.Schema
  import Ecto.Query, warn: false
  import Ecto.Changeset
  import MyApp.ChangesetHelpers

  schema "books" do
    field :name, :string

    field :genres, {:array, :string}, default: []

brentjanderson

These snippets provide a foundation for starting and stopping supervision trees at runtime using feature flags (e.g. Launch Darkly).

Some things to note when adapting these snippets:

1. application.ex needs to be adapted into an existing application. The important part is that each child spec provided is compliant, and that there is a feature flag (ld_key) specified.
2. As written, if a feature flag fails for some reason, it defaults to starting all children. There is room for adaptation here as needed.
3. This implementation will still require a FeatureFlags module to be available that implements is_on?/2. Adjust as needed to accomodate your own feature flag setup.

LostKobrakai

defmodule NestedWeb.FormLive do
  use NestedWeb, :live_view
  require Logger

  defmodule Form do
    use Ecto.Schema
    import Ecto.Changeset

    embedded_schema do
      field :name, :string

mrdotb

defmodule AppWeb.Host do
  @moduledoc """
  Conveniences for working with host.
  """
  def root do
    Keyword.get(get_config(), :root)
  end

  def root_uri do
    Keyword.get(get_config(), :root_uri)

angelikatyborska

# Has one external dependency except for Gettext: https://github.com/rrrene/html_sanitize_ex

defmodule MyApp.Gettext do
  @doc """
  A helper for translations with links.

  Pass in the translation string which must include
  `%{link_start}`/`%{link_end}`. For multiple URLs, use
  `%{link_start_<0,1,2...>}`.

PJUllrich

Big-O Time Complexities for Elixir data structures

Map [1]

Operation	Time Complexity
Access	O(log n)
Search	O(log n)
Insertion	O(n) for <= 32 elements, O(log n) for > 32 elements [2]
Deletion	O(n) for <= 32 elements, O(log n) for > 32 elements

basnijholt

//@version=4
study(title="CTO Line", shorttitle="CTO", overlay=true, resolution="")
smma(src, length) =>
    smma = 0.0
    smma := na(smma[1]) ? sma(src, length) : (smma[1] * (length - 1) + src) / length
    smma
v1 = smma(hl2, 15)
m1 = smma(hl2, 19)
m2 = smma(hl2, 25)
v2 = smma(hl2, 29)

alex-min

require('fattable/fattable.js');


/* 
 * This variable is used to keep the scroll position when the live view navigation changes.
 * This is useful for modals.
*/
let keepScroll = {};

export default {

goofansu

let Uploaders = {}

Uploaders.S3 = function (entries, onViewError) {
  entries.forEach(entry => {
    let xhr = new XMLHttpRequest()
    onViewError(() => xhr.abort())
    xhr.onload = () => (xhr.status === 200 ? entry.done() : entry.error())
    xhr.onerror = () => entry.error()
    xhr.upload.addEventListener("progress", event => {
      if (event.lengthComputable) {

TylerPachal

@doc """
Asserts that the given changeset is invalid, and that when the
assertion_expression is applied to the error_message it results in a truthy
value.
"""
defmacro assert_invalid(changeset, field, assertion_expression) when is_atom(field) do
  expr = Macro.to_string(assertion_expression)
  quote do
    c = unquote(changeset)