Add JavaScript snippets #51

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	[
	{
	"categoryName": "Basics",
	"snippets": [
	{
	"title": "Hello, World!",
	"description": "Prints Hello, World! to the terminal.",
	"code": [
	"public class HelloWorld {",
	" public static void main(String[] args) {",
	" // Output: \"Hello, World!\"",
	" System.out.println(\"Hello, World!\");",
	" }",
	"}"
	],
	"tags": ["java", "hello-world"],
	"author": "axorax"
	}
	]
	},
	{
	"categoryName": "String Manipulation",
	"snippets": [
	{
	"title": "Reverse String",
	"description": "Reverses the characters in a string.",
	"code": [
	"public class StringManipulation {",
	" public static String reverseString(String s) {",
	" StringBuilder reversed = new StringBuilder(s);",
	" return reversed.reverse().toString();",
	" }",
	"",
	" // Usage:",
	" public static void main(String[] args) {",
	" System.out.println(reverseString('hello')); // Output: 'olleh'",
	" }",
	"}"
	],
	"tags": ["java", "string", "reverse", "utility"],
	"author": "axorax"
	},
	{
	"title": "Check Palindrome",
	"description": "Checks if a string is a palindrome.",
	"code": [
	"public class StringManipulation {",
	" public static boolean isPalindrome(String s) {",
	" String cleanString = s.replaceAll(\"\\s+\", \"\").toLowerCase();",
	" StringBuilder reversed = new StringBuilder(cleanString);",
	" return cleanString.equals(reversed.reverse().toString());",
	" }",
	"",
	" // Usage:",
	" public static void main(String[] args) {",
	" System.out.println(isPalindrome('A man a plan a canal Panama')); // Output: true",
	" }",
	"}"
	],
	"tags": ["java", "string", "palindrome", "check"],
	"author": "axorax"
	},
	{
	"title": "Count Vowels",
	"description": "Counts the number of vowels in a string.",
	"code": [
	"public class StringManipulation {",
	" public static int countVowels(String s) {",
	" int count = 0;",
	" String vowels = 'aeiouAEIOU';",
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	" for (int i = 0; i < s.length(); i++) {",
	" if (vowels.indexOf(s.charAt(i)) != -1) {",
	" count++;",
	" }",
	" }",
	" return count;",
	" }",
	"",
	" // Usage:",
	" public static void main(String[] args) {",
	" System.out.println(countVowels('hello')); // Output: 2",
	" }",
	"}"
	],
	"tags": ["java", "string", "vowels", "count"],
	"author": "axorax"
	},
	{
	"title": "Find Substring First Occurrence",
	"description": "Finds the first occurrence of a substring in a string.",
	"code": [
	"public class StringManipulation {",
	" public static int findSubstring(String s, String substring) {",
	" return s.indexOf(substring);",
	" }",
	"",
	" // Usage:",
	" public static void main(String[] args) {",
	" System.out.println(findSubstring('hello world', 'world')); // Output: 6",
	" }",
	"}"
	],
	"tags": ["java", "string", "substring", "search"],
	"author": "axorax"
	},
	{
	"title": "Capitalize First Letter",
	"description": "Capitalizes the first letter of a string.",
	"code": [
	"public class StringManipulation {",
	" public static String capitalizeFirstLetter(String s) {",
	" if (s == null \|\| s.isEmpty()) {",
	" return s;",
	" }",
	" return s.substring(0, 1).toUpperCase() + s.substring(1);",
	" }",
	"",
	" // Usage:",
	" public static void main(String[] args) {",
	" System.out.println(capitalizeFirstLetter('hello')); // Output: 'Hello'",
	" }",
	"}"
	],
	"tags": ["java", "string", "capitalize", "utility"],
	"author": "axorax"
	}
	]
	}
	]

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