harmenjanssen

const findInDomAncestry = predicate => node =>
    typeof node.nodeType === 'undefined' || node.nodeType === Node.DOCUMENT_NODE
    ? undefined
    : predicate(node)
    ? node
    : findInDomAncestry(predicate)(node.parentNode);

/*
 Example usage:
 

harmenjanssen

const reverse = ([head, ...rest]) =>
  !head ? [] : reverse([...rest]).concat([head]);

harmenjanssen

const isEven = n => n === 0 ?
      true : 
      !isEven(n - 1);

harmenjanssen

const toObj = (keys, values, index = keys.length - 1) =>
  typeof keys[index] === "undefined"
    ? {}
    : Object.assign(
        toObj(keys, values, index - 1), 
        {
          [keys[index]]: values[index]
        }
    );

harmenjanssen

const sum = (collection, runningTotal = 0) =>
  !collection.length ?
  runningTotal :
  sum(collection.slice(1), collection[0] + runningTotal);

harmenjanssen

const range = (max, n = 0) => 
  n >= max ? 
  [] : 
  [n].concat(range(max, n+1));

harmenjanssen

/**
 * Sexy functional bits
 * ----------------------------------------------------
 */
const range = max => Array.apply(null, Array(max)).map((_, i) => i);

const slice = (xs, index, size) => xs.slice(index, index + size);

const segmentSize = (len, iteration, segments) =>
  Math.ceil((len - iteration) / segments);

harmenjanssen

<?php
/**
 * Extract a substring from $input centered around $search with a maximum of $maxLength chars.
 *
 *
 * @param string $input
 * @param string $search    The substring to search for.
 * @param int    $maxLength Maxlength of the excerpt, including delimiters.
 * @param string $delimiter Character used to denote a break at the front or end of the excerpt.
 * @return string

harmenjanssen

/**
 * Usage:
 * $('.my-nodes').each(parameterizeJqCallback(myFunction));
 * 
 */
const parameterizeJqCallback = (fn) => function(...args) {
  return fn($(this), ...args);
};

harmenjanssen

<p>This is the homepage.</p>
<a href="<% url('home') %>">A link to myself</a>

<!--
This will throw an error: "No route found with the name:home"
-->