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Tamio Honma IOIO72

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IOIO72 / Group by label property
Last active Oct 14, 2019
An array of objects of same structure is given. Each object contains a property `label` besides other properties. Same labels are equal accross the objects. The goal is to group the objects by the labels.
View Group by label property
// Get an array of all labels with unique entries.
const uniqueLabels = [ Set( => item.label))];
// Transform the original array of objects to an array of label groups.
const groupedApps = => ({ label, stores: apps.filter(app => app.label.includes(label)) }));
IOIO72 / rgb2hex.ts
Created Aug 23, 2019
Convert decimal RGB values to HTML hex string
View rgb2hex.ts
// prepend a character to a string for a given result string length
const prependCharToLength = (str: string, char: string = '0', len: number = 2): string => {
let r: string[] = [];
let s: string[] = str.split('');
for (let i: number = len - 1; i >= 0; i--) {
r[i] = (s.length - i > 0) ? s[i] : char;
return r.join('');
View gist:933cf59baeb4a8f2e464b8d336cce49e
Verifying my Blockstack ID is secured with the address 1Nu8r4xtC7uBYri355emFongdcF96RBiGh
IOIO72 / convertUmlauts.js
Created Jun 13, 2019
Converts str input into string with Umlaut replacements
View convertUmlauts.js
export const convertUmlauts = str => {
const charMap = {
'ä': 'ae',
'ö': 'oe',
'ü': 'ue',
'Ä': 'Ae',
'Ö': 'Oe',
'Ü': 'Ue',
'ß': 'ss'
IOIO72 / isValidDate.js
Created Jun 13, 2019
Returns true or false depending on valid date object.
View isValidDate.js
export const isValidDate = d => d instanceof Date && !isNaN(d);
IOIO72 / .htaccess
Created May 28, 2019
Configure time-based conditional redirects
View .htaccess
RewriteEngine On
RewriteCond %{TIME} <20190319010000
RewriteRule ^agb\.html$ /legal/beta [R=302,L]
IOIO72 / .htaccess
Created May 28, 2019
Remove `.html` from request.
View .htaccess
RewriteEngine On
RewriteCond %{REQUEST_FILENAME} /.*\.html
RewriteRule ^(.*)\.html$ /$1 [R=301,L]
IOIO72 / removeSymbolPrefix
Created May 10, 2019
Removes everything prefixed until the first alphabetical character
View removeSymbolPrefix
const removeSymbolPrefix = str => /^([^a-z]*)(.*)$/gi.exec(str)[2] || str;
IOIO72 / normalizeURIComponentName
Created May 10, 2019
As an alternative conversion to encodeURIComponent this function removes every character except the alphabet and `-` and replaces spaces by `-`
View normalizeURIComponentName
const normalizeURIComponentName = str => {
const stripChars = /[^a-z-\s]/gi;
return (
str.toLowerCase().replace(stripChars, '').replace(/\s/gi, '-') || str
IOIO72 / getKeyValueSafely
Created May 10, 2019
checks key existance before getting key value
View getKeyValueSafely
const getKeyValueSafely = (obj, key) => (
obj.hasOwnProperty(key) ? obj[key] : undefined
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