Implement misc and tests

.gitignore

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+.idea/
+._*
+.DS_Store
+bun.lockb
+package-lock.json
+node_modules/

index.test.ts

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+import {a2b64, a2str, b642a, str2a} from './index'
+
+import {test, expect} from 'bun:test'
+
+test('str2a and a2str are reciprocal', () => {
+    const from = "Testing value !"
+
+    let buff = str2a(from)
+    let to = a2str(buff)
+
+    expect(to).toBe(from)
+})
+
+test('b642a and a2b64 are reciprocal', () => {
+    const from_str = "Testing value !"
+    const from = btoa(from_str)
+
+    let buff = b642a(from).expect("Should encode valid b64")
+    let to = a2b64(buff)
+
+    expect(to).toBe(from)
+})
+
+
+test("b642a doesn't accept invalid b64", () => {
+    b642a("pa'0ac'i !!").expect_err("Shouldn't unpack invalid b64")
+})

index.ts

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+import {Result} from 'result'
+
+export function a2str(buf: Uint8Array) : string {
+    // @ts-ignore
+    return String.fromCharCode.apply(null, buf)
+}
+export function str2a(str: string) : Uint8Array {
+    const buf = new Uint8Array(str.length)
+
+    for (let i= 0, strLen = str.length; i < strLen; i++) {
+        buf[i] = str.charCodeAt(i)
+    }
+
+    return buf
+}
+
+export function a2b64(buf: Uint8Array) : string {
+    return btoa(a2str(buf))
+}
+export function b642a(b64: string) : Result<Uint8Array> {
+    try {
+        return Result.ok(str2a(atob(b64)))
+    } catch (e) {}
+
+    return Result.error([])
+}

package.json

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+{
+  "name": "misc",
+  "description": "Various utils",
+  "module": "index.ts",
+  "type": "module",
+  "files": ["index.ts"],
+  "dependencies": {
+    "result": "git+git@git.pband.ch/typescript/result"
+  },
+  "devDependencies": {
+    "@types/bun": "^1.0.11"
+  },
+  "peerDependencies": {
+    "typescript": "^5.0.0"
+  }
+}

tsconfig.json

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+{
+  "compilerOptions": {
+    "baseUrl": ".",
+
+    // Enable latest features
+    "lib": [
+      "ESNext",
+      "dom"
+    ],
+    "target": "ESNext",
+    "module": "ESNext",
+    "moduleDetection": "force",
+    "allowJs": false,
+    "checkJs": true,
+
+    // Bundler mode
+    "moduleResolution": "bundler",
+    "allowImportingTsExtensions": true,
+    "verbatimModuleSyntax": true,
+    "noEmit": true,
+
+    // Best practices
+    "strict": true,
+    "skipLibCheck": true,
+    "noFallthroughCasesInSwitch": true,
+
+    // Some stricter flags (disabled by default)
+    "noUnusedLocals": false,
+    "noUnusedParameters": false,
+    "noPropertyAccessFromIndexSignature": false
+  },
+  "include": [
+    "index.ts",
+  ]
+}