lint ts

.eslintrc.js

@@ -0,0 +1,142 @@
+module.exports = {
+	"env": {
+		"browser": true,
+		"es6": true,
+		"node": true
+	},
+	"extends": [
+		"plugin:@typescript-eslint/recommended",
+		"plugin:@typescript-eslint/recommended-requiring-type-checking"
+	],
+	"parser": "@typescript-eslint/parser",
+	"parserOptions": {
+		"project": "tsconfig.json",
+		"sourceType": "module"
+	},
+	"plugins": [
+		"@typescript-eslint",
+		"@typescript-eslint/tslint"
+	],
+	"rules": {
+		"@typescript-eslint/prefer-includes": "off",
+		"@typescript-eslint/unbound-method": "off",
+		"@typescript-eslint/no-non-null-assertion": "off",
+		"@typescript-eslint/member-delimiter-style": "error",
+		"@typescript-eslint/no-misused-promises": "error",
+		"@typescript-eslint/explicit-function-return-type": "off",
+		"@typescript-eslint/camelcase": "off",
+		"@typescript-eslint/adjacent-overload-signatures": "error",
+		"@typescript-eslint/array-type": "error",
+		"@typescript-eslint/ban-types": "error",
+		"@typescript-eslint/class-name-casing": "error",
+		"@typescript-eslint/consistent-type-assertions": "error",
+		"@typescript-eslint/indent": [
+			"error",
+			"tab",
+			{
+				"ArrayExpression": "first",
+				"ObjectExpression": "first"
+			}
+		],
+		"@typescript-eslint/interface-name-prefix": "off",
+		"@typescript-eslint/no-empty-function": "off",
+		"@typescript-eslint/no-empty-interface": "error",
+		"@typescript-eslint/no-explicit-any": "off",
+		"@typescript-eslint/no-misused-new": "error",
+		"@typescript-eslint/no-namespace": "error",
+		"@typescript-eslint/no-parameter-properties": "off",
+		"@typescript-eslint/no-use-before-define": "off",
+		"@typescript-eslint/no-var-requires": "error",
+		"@typescript-eslint/prefer-for-of": "error",
+		"@typescript-eslint/prefer-function-type": "error",
+		"@typescript-eslint/prefer-namespace-keyword": "error",
+		"@typescript-eslint/quotes": [
+			"error",
+			"single",
+			{
+				"avoidEscape": true
+			}
+		],
+		"@typescript-eslint/triple-slash-reference": "error",
+		"@typescript-eslint/unified-signatures": "off",
+		"camelcase": "off",
+		"comma-dangle": "error",
+		"complexity": "off",
+		"constructor-super": "error",
+		"dot-notation": "error",
+		"eqeqeq": [
+			"error",
+			"smart"
+		],
+		"guard-for-in": "off",
+		"id-blacklist": [
+			"error",
+			"any",
+			"Number",
+			"number",
+			"String",
+			"string",
+			"Boolean",
+			"boolean",
+			"Undefined"
+		],
+		"id-match": "error",
+		"max-classes-per-file": [
+			"error",
+			1
+		],
+		"max-len": "off",
+		"new-parens": "error",
+		"no-bitwise": "off",
+		"no-caller": "error",
+		"no-cond-assign": "off",
+		"no-console": "off",
+		"no-debugger": "error",
+		"no-empty": "off",
+		"no-eval": "error",
+		"no-fallthrough": "off",
+		"no-invalid-this": "off",
+		"no-multiple-empty-lines": "off",
+		"no-new-wrappers": "error",
+		"no-shadow": [
+			"error",
+			{
+				"hoist": "all"
+			}
+		],
+		"no-throw-literal": "error",
+		"no-trailing-spaces": "error",
+		"no-undef-init": "error",
+		"no-underscore-dangle": "off",
+		"no-unsafe-finally": "error",
+		"no-unused-expressions": "error",
+		"no-unused-labels": "error",
+		"no-var": "error",
+		"object-shorthand": "error",
+		"one-var": [
+			"error",
+			"never"
+		],
+		"prefer-arrow/prefer-arrow-functions": "off",
+		"prefer-const": "error",
+		"radix": "error",
+		"spaced-comment": "error",
+		"use-isnan": "error",
+		"valid-typeof": "off",
+		"@typescript-eslint/tslint/config": [
+			"error",
+			{
+				"rules": {
+					"jsdoc-format": true,
+					"no-reference-import": true,
+					"no-unsafe-any": true,
+					"whitespace": [
+						true,
+						"check-branch",
+						"check-operator"
+					]
+				}
+			}
+		]
+	}
+};

package.json

@@ -6,7 +6,7 @@
 	"types": "dist/index.d.ts",
 	"scripts": {
 		"test": "mocha",
-		"lint": "eslint ./src/*.ts",
+		"lint": "eslint ./src/*.ts ./src/**/*.ts",
 		"clean": "del-cli ./dist/",
 		"ts:cjs": "tsc -m commonjs",
 		"ts:umd": "tsc -t es5 -m umd -d false --outDir ./dist/umd/",

src/back.ts

@@ -0,0 +1,3 @@
+export default function arr_back<T>(arr: T[]) {
+	return arr[arr.length - 1];
+}