unique

Removes duplicate values from an array, returning a new array with only unique elements. Order is preserved — the first occurrence of each value is kept.

Syntax

unique(array)

or chained:

<array>.unique()

Arguments

• array (array, optional when chained) - The array to deduplicate.

Examples

Deduplicate numbers

unique([1, 2, 2, 3, 1])
// [1, 2, 3]

Deduplicate strings

["a", "b", "a", "c", "b"].unique()
// ["a", "b", "c"]

CLI usage — get unique tags

$ echo '{"tags": ["go", "cli", "go", "json", "cli"]}' | dasel -i json 'tags.unique()'
[
    "go",
    "cli",
    "json"
]

Chained with other functions

[3, 1, 2, 1, 3].unique().sortBy()
// [1, 2, 3]