kendru

-- Get replication identity for a table.
SELECT CASE relreplident
          WHEN 'd' THEN 'default'
          WHEN 'n' THEN 'nothing'
          WHEN 'f' THEN 'full'
          WHEN 'i' THEN 'index'
       END AS replica_identity
FROM pg_class
WHERE oid = 'my_table'::regclass;
-- Note 'my_table'::regclass is equivalent to (SELECT oid FROM pg_class WHERE relname = 'my_table')

kendru

const crypto = require('crypto');

const charTbl = '0123456789abcdefghjkmnpqrstvwxyz';
const encodeChunk = (n) => charTbl[n];

const nthChunk = (input, idx) => {
	const startBit = 5*idx;
	const offset = startBit % 8;
	const startByte = (startBit - offset)/8;

kendru

use std::collections::VecDeque;
use std::sync::{Arc, Mutex};
use std::sync::mpsc;
use std::thread;

struct QueueInner<T: Send> {
    items: VecDeque<T>,
    is_done: bool,
    parked_producers: VecDeque<mpsc::Sender<()>>,
}

kendru

(ns notifications.actor
  (:require [reagent.core :as r]
            [cljs.core.async :refer [go-loop pub sub chan <! >! put! timeout]]))

(defn actor-system []
  (atom {}))

(defn mailbox [address]
  [address (chan)])

kendru

const promise_ = Symbol('promise');
class Deferred {
    constructor() {
        this[promise_] = new Promise((resolve, reject) => {
            this.resolve = resolve;
            this.reject = reject;
        });
    }

    get promise() {

kendru

(defn is-error-clause? [expr]
  (and (sequential? expr)
       (= 'on-error (first expr))))

(defn parse-clauses [exprs]
  (let [[body error-clauses] (partition-by is-error-clause? exprs)
        [_ error-name & error-body] (first error-clauses)]
    {:body body
     :error-name error-name
     :error-body error-body}))

kendru

function highlightText(text, highlights) {
    const lcText = text.toLowerCase();
    highlights = highlights.map(h => h.toLowerCase());

    let addedChars = 0;
    for (let i = 0; i < text.length; i++) {
        for (const highlight of highlights) {
            if (
                lcText[i] === highlight[0] &&
                lcText.substring(i, i + highlight.length) === highlight

kendru

#!/bin/bash

docker pull postgres:11-alpine

docker network inspect postgres_sandbox  > /dev/null 2>&1
if [[ "$?" == "0" ]]; then
    docker network rm postgres_sandbox
fi
docker network create --driver bridge postgres_sandbox

kendru

(defn make-mailbox
 ([] (make-mailbox {:messages []
                    :next-id 1}))
 ([state]
  {:deliver!
   (fn [msg]
     (make-mailbox
       (-> state
          (update :messages conj
            (assoc msg :read? false

kendru

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