@tidyjs/tidy/dist/lib/slice.js

Tidy up your data with JavaScript, inspired by dplyr and the tidyverse

'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

var d3Array = require('d3-array');
var arrange = require('./arrange.js');

function slice(start, end) {
  const _slice = (items) => items.slice(start, end);
  return _slice;
}
const sliceHead = (n) => slice(0, n);
const sliceTail = (n) => slice(-n);
function sliceMin(n, orderBy) {
  const _sliceMin = (items) => arrange.arrange(orderBy)(items).slice(0, n);
  return _sliceMin;
}
function sliceMax(n, orderBy) {
  const _sliceMax = (items) => typeof orderBy === "function" ? arrange.arrange(orderBy)(items).slice(-n).reverse() : arrange.arrange(arrange.desc(orderBy))(items).slice(0, n);
  return _sliceMax;
}
function sliceSample(n, options) {
  options = options != null ? options : {};
  const {replace} = options;
  const _sliceSample = (items) => {
    if (!items.length)
      return items.slice();
    if (replace) {
      const sliced = [];
      for (let i = 0; i < n; ++i) {
        sliced.push(items[Math.floor(Math.random() * items.length)]);
      }
      return sliced;
    }
    return d3Array.shuffle(items.slice()).slice(0, n);
  };
  return _sliceSample;
}

exports.slice = slice;
exports.sliceHead = sliceHead;
exports.sliceMax = sliceMax;
exports.sliceMin = sliceMin;
exports.sliceSample = sliceSample;
exports.sliceTail = sliceTail;
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