Core: fix formatting dimensionless input when empty target

Author: Lemonexe

.gitignore

@@ -12,6 +12,7 @@ node_modules
 dist
 dist-ssr
 *.local
+*.tgz
 
 # Editor directories and files
 .vscode/*

package-lock.json

@@ -1,6 +1,6 @@
 {
 	"name": "uuc-core",
-	"version": "1.0.0",
+	"version": "1.0.1",
 	"description": "Ultimate Unit Converter Core Library",
 	"homepage": "https://github.com/Lemonexe/UUC#readme",
 	"author": "Jiri Zbytovsky",

packages/core/package.json

@@ -16,6 +16,7 @@ describe(balanceBrackets.name, () => {
 
 describe(vector2text.name, () => {
 	it('converts a simple vector to text', () => {
+		expect(vector2text([0, 0, 0, 0, 0, 0, 0, 0])).toBe('');
 		expect(vector2text([0, 1, 0, 0, 0, 0, 0, 0])).toBe('kg');
 		expect(vector2text([0, 0, 0, 0, 0, 0, -1, 0])).toBe('1/cd');
 	});

packages/core/src/__tests__/utils.test.ts

@@ -94,6 +94,7 @@ export const vector2text = (v: V): string => {
 		if (v[i] > 0) text += v[i];
 		else if (v[i] < 0) text += -v[i];
 	}
+	if (text === '1') return ''; // dimensionless; representing it would be superfluous
 	return text.replace(/^1\*/, ''); // remove leading 1*, we need only leading 1/
 };
 

packages/core/src/utils.ts

@@ -122,8 +122,7 @@ function getUnitList(filter: string): GetUnitListResult {
 function buildUnitEntry(unit: Unit) {
 	const aliases = unit.alias ? ', ' + unit.alias.join(', ') : '';
 	let text = ` (${unit.id + aliases}) `;
-	let dim = vector2text(unit.v);
-	dim = dim === '1' ? '' : dim;
+	const dim = vector2text(unit.v);
 	text += unit.basic || isNaN(unit.k) ? '' : ` = ${unit.k} ${dim}\n`;
 
 	if (unit.constant) {