[Sync Solution] typescript/resistor-color-trio

solutions/typescript/resistor-color-trio/1/resistor-color-trio.ts

@@ -0,0 +1,54 @@
+type Color =
+	| "black"
+	| "brown"
+	| "red"
+	| "orange"
+	| "yellow"
+	| "green"
+	| "blue"
+	| "violet"
+	| "grey"
+	| "white";
+
+const COLORS = [
+	"black",
+	"brown",
+	"red",
+	"orange",
+	"yellow",
+	"green",
+	"blue",
+	"violet",
+	"grey",
+	"white",
+];
+
+type Magnitude = "giga" | "mega" | "kilo" | "";
+
+export function decodedResistorValue(colors: Color[]) {
+	const [code1, code2, zeros, ...arg] = colors;
+	const block = COLORS.indexOf(code1) * 10 + COLORS.indexOf(code2);
+	const total = block * Math.pow(10, COLORS.indexOf(zeros));
+	let number: number;
+	let magnitude: Magnitude;
+	const giga = 1_000_000_000;
+	const mega = 1_000_000;
+	const kilo = 1_000;
+	const isGiga = total / giga > 0 && Number.isInteger(total / giga);
+	const isMega = total / mega > 0 && Number.isInteger(total / mega);
+	const isKilo = total / kilo > 0 && Number.isInteger(total / kilo);
+	if (isGiga) {
+		number = total / giga;
+		magnitude = "giga";
+	} else if (isMega) {
+		number = total / mega;
+		magnitude = "mega";
+	} else if (isKilo) {
+		number = total / kilo;
+		magnitude = "kilo";
+	} else {
+		number = total;
+		magnitude = "";
+	}
+	return `${number} ${magnitude}ohms`;
+}