fix(underscoreToTitleCase!): fix function name and comments (#1)

* fix function name and comments

* 0.5.0

Author: shivajivarma

deno.json

@@ -1,6 +1,6 @@
 {
   "name": "@utility/string",
-  "version": "0.4.1",
+  "version": "0.5.0",
   "tasks": {
     "coverage": "deno task test --coverage=./dist/coverage && deno coverage --include=src --lcov ./dist/coverage > ./dist/coverage/lcov.info",
     "test": "deno test"

src/string.ts

@@ -2,17 +2,41 @@
  * Converts provided underscore format string to camel case
  *
  * @param {string} value The value to convert
- * @return {boolean} Returns `true` if `value` is a valid iso date, else `false`.
+ * @return {string} Returns the title cased string.
  * @example
  * ```ts
  * underscoreToCamelCase("hello_world");
  * // => Hello World
  * ```
  */
-export function underscoreToCamelCase(value: string): string {
-  value = value.charAt(0).toUpperCase() + value.slice(1);
-  value = value.replace(/_(.)/g, (_match: string, letter) => {
+export function underscoreToTitleCase(
+  value: string | null | undefined,
+): string {
+  let strValue = _toString(value);
+  strValue = strValue.charAt(0).toUpperCase() + strValue.slice(1);
+  strValue = strValue.replace(/_(.)/g, (_match: string, letter) => {
     return ` ${letter.toUpperCase()}`;
   });
-  return value.replace("_", " ");
+  return strValue.replace("_", " ");
+}
+
+/** Used as references for various `Number` constants. */
+const INFINITY = 1 / 0;
+
+function _toString(value: any): string {
+  if (value == null) {
+    return "";
+  }
+  // Exit early for strings to avoid a performance hit in some environments.
+  if (typeof value === "string") {
+    return value;
+  }
+  if (Array.isArray(value)) {
+    // Recursively convert values (susceptible to call stack limits).
+    return `${
+      value.map((other) => (other == null ? other : _toString(other)))
+    }`;
+  }
+  const result = `${value}`;
+  return result === "0" && 1 / value === -INFINITY ? "-0" : result;
 }

test/mod.test.ts

@@ -1,10 +1,12 @@
 import { assertEquals, describe, it } from "../test_deps.ts";
 
-import { underscoreToCamelCase } from "../mod.ts";
+import { underscoreToTitleCase } from "../mod.ts";
 
 describe("string", function () {
-  it("underscoreToCamelCase()", function () {
-    assertEquals(underscoreToCamelCase("hello_world"), "Hello World");
-    assertEquals(underscoreToCamelCase("_hello_world_"), " Hello World ");
+  it("underscoreToTitleCase()", function () {
+    assertEquals(underscoreToTitleCase("hello_world"), "Hello World");
+    assertEquals(underscoreToTitleCase("_hello_world_"), " Hello World ");
+    assertEquals(underscoreToTitleCase(null), "");
+    assertEquals(underscoreToTitleCase(undefined), "");
   });
 });

version.json

@@ -1,5 +1,5 @@
 {
-  "version": "0.4.1",
+  "version": "0.5.0",
   "deno": true,
   "node": true,
   "jsr": true,