Replacing all matches in a string
The String prototype’s replace function only replaces the first occurrence of a substring by default. We can extend that with a global flag on the expression.
Read fire tipFiltering falsy values from arrays
The constructor for Boolean values is all you need to filter all falsy values from an array. Keep in mind that this takes out false, 0, null, undefined, empty strings, and NaN. If you don’t want that, filter by something more specific.
const values = [
5, null, false, 'hi', 0, undefined, { name: 'Tim' }, '', true, NaN, [7]
]
// `Boolean` takes out ALL falsy values
values.filter(Boolean)
// ⇒ [5, 'hi', { name: 'Tim' }, true, [7]]
// `x != null` leaves most falsy values, taking out `null` and `undefined`
values.filter(value => value != null)
// ⇒ [5, false, 'hi', 0, { name: 'Tim' }, '', true, NaN, [7]]
More fire tips
Using the ternary operator in assignment and return
Read fire tipRelative timestamps with Intl
With JavaScript’s built-in formatter for relative timestamps, we can build strings like “2 months from now” without having to use third party libraries.
Read fire tip