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def zigzag_sorted(iterable, key=None):
    """It returns list sorted in zigzag.
    :rtype: generator object (iterator)

    >>> list(zigzag_sorted([1, 2, 3, 4, 5, 6, 7]))
    [1, 7, 2, 6, 3, 5, 4]
    """
    i = 0
    l = sorted(iterable, key=key)
    n = len(l)

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export const range = (start: number, stop: number, step: number=1) => {
  // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/from#Sequence_generator_(range)
  return Array.from({ length: (stop - start - 1) / step + 1}, (_, i) => start + (i * step));
}

export const all = (values: any[]) => {
  for (let value of values) {
    if (!value) {
      return false;
    }

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const { pbkdf2Sync } = require('crypto');

export const validate = (raw, password, len=32) => {
  const [method, iterations, salt, hash] = password.split('$');
  const digest = method.split("_")[1];
  return pbkdf2Sync(raw, salt, parseInt(iterations, 10), len, digest).toString('base64') === hash;
};

export const make = (raw, iterations, digest="sha256", salt="", len=32) => {
  if (salt === "") {

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import json
import urllib.request

WEBHOOK_URL = "https://hooks.slack.com/services/XXXXXXXXXX/YYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYY"
MESSAGE_TEMPLATE = """<{url}|{message}>"""


def lambda_handler(event, context):
    post(event)
    return {"statusCode": 200}