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master @ 43 LINES
 
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// Horizontal bar chart:
// ENTROPY     ████████████████░░░░░░░░  12
import { checkGrid, len, pad } from "../../lib/ascii";

export interface BarItem {
  label: string;
  value: number;
}

export interface Props {
  items: BarItem[];
  /** Label column cells; longer labels truncate with .... */
  labelW?: number;
  /** Scale ceiling; defaults to the largest value. */
  max?: number;
}

export function buildBarChart(
  items: BarItem[],
  width: number,
  { labelW = 12, max }: Omit<Props, "items"> = {},
): string {
  if (!items.length) return "";
  const top = max ?? Math.max(...items.map((i) => i.value));
  const valueW = Math.max(...items.map((i) => len(String(i.value))));
  const barW = width - labelW - valueW - 2;
  if (barW < 4) {
    throw new Error(`[ascii] bar chart needs ${labelW + valueW + 6} cells, got ${w
idth}`);
  }
  return items
    .map((it) => {
      const label =
        len(it.label) > labelW
          ? [...it.label].slice(0, labelW - 3).join("") + "..."
          : it.label;
      const filled = top <= 0 ? 0 : Math.round((Math.max(0, it.value) / top) * bar
W);
      const bar = "█".repeat(filled) + "░".repeat(barW - filled);
      const line = pad(label, labelW) + bar + "  " + pad(String(it.value), valueW,
 "start");
      return checkGrid(line, width, "bar chart row");
    })
    .join("\n");
}


// Horizontal bar chart:
// ENTROPY     ████████████████░░░░░░░░  12
import { checkGrid, len, pad } from "../../l
ib/ascii";

export interface BarItem {
  label: string;
  value: number;
}

export interface Props {
  items: BarItem[];
  /** Label column cells; longer labels trun
cate with .... */
  labelW?: number;
  /** Scale ceiling; defaults to the largest
 value. */
  max?: number;
}

export function buildBarChart(
  items: BarItem[],
  width: number,
  { labelW = 12, max }: Omit<Props, "items">
 = {},
): string {
  if (!items.length) return "";
  const top = max ?? Math.max(...items.map((
i) => i.value));
  const valueW = Math.max(...items.map((i) =
> len(String(i.value))));
  const barW = width - labelW - valueW - 2;
  if (barW < 4) {
    throw new Error(`[ascii] bar chart needs
 ${labelW + valueW + 6} cells, got ${width}`
);
  }
  return items
    .map((it) => {
      const label =
        len(it.label) > labelW
          ? [...it.label].slice(0, labelW - 
3).join("") + "..."
          : it.label;
      const filled = top <= 0 ? 0 : Math.rou
nd((Math.max(0, it.value) / top) * barW);
      const bar = "█".repeat(filled) + "░".r
epeat(barW - filled);
      const line = pad(label, labelW) + bar 
+ "  " + pad(String(it.value), valueW, "star
t");
      return checkGrid(line, width, "bar cha
rt row");
    })
    .join("\n");
}

 
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