Getting the largest number from an array
To find the largest value in an array of numbers, we can spread that array into Math.max() instead of manually iterating over it.
JavaScript
Read fire tipRelative timestamps with Intl
JavaScript
JavaScript has a built-in formatter for relative timestamps. It returns strings like “yesterday” or “2 months from now” in the language you specify.
This does not currently work in IE and Safari.
// a positive value describes a time in the future
new Intl.RelativeTimeFormat('en').format(2, 'day')
// ⇒ 'in 2 days'
// a negative value describes a time in the past
new Intl.RelativeTimeFormat('en').format(-1, 'day')
// ⇒ '1 day ago'
// `numeric: 'auto'` results in strings like “yesterday” and “tomorrow”
new Intl.RelativeTimeFormat('en', { numeric: 'auto' }).format(-1, 'day')
// ⇒ 'yesterday'
// the formatter can base its output on different languages
new Intl.RelativeTimeFormat('de').format(3, 'month')
// ⇒ 'in 3 Monaten'
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Spongebobifying strings
JavaScript
Read fire tipChecking if something is an array
We cannot use the typeof operator in JavaScript to check if something is an array or not. Luckily, there is a helper function on the Array prototype for that.
JavaScript
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