@dpkit/table
Version:
Data Package implementation in TypeScript.
15 lines • 2.5 kB
JavaScript
import { DataType } from "nodejs-polars";
import { col, concatString, lit } from "nodejs-polars";
const DEFAULT_FORMAT = "%H:%M:%S";
export function parseTimeField(field, expr) {
expr = expr ?? col(field.name);
let format = DEFAULT_FORMAT;
if (field.format && field.format !== "default" && field.format !== "any") {
format = field.format;
}
return concatString([lit("1970-01-01T"), expr], "")
.str.strptime(DataType.Datetime, `%Y-%m-%dT${format}`)
.cast(DataType.Time)
.alias(field.name);
}
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