strings.isDigit() function
strings.isDigit() tests if a single-character string is a digit (0-9).
Function type signature
(v: string) => bool
For more information, see Function type signatures.
Parameters
v
(Required) Single-character string to test.
Examples
Filter by columns with digits as values
import "strings"
data
|> filter(fn: (r) => strings.isDigit(v: r._value))
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