To merge an array of strings into a single string split by a new line in PHP, you can use the `implode` function to join the array elements into a single string, with the new line character (`\n`) as the delimiter.
Here's an example code snippet:
// An array of strings $array_of_strings = array('Hello', 'world', 'in', 'PHP'); // Merge the array into a single string with new line delimiter $merged_string = implode("\n", $array_of_strings); // Output the merged string echo $merged_string;
To check if a string starts with a number in Node.js, you can use a regular expression.
Here's an example code snippet that checks if a string starts with a number:
const myString = "5abc"; const startsWithNumber = /^\d/.test(myString); console.log(startsWithNumber); // true
In the code above, we first define a string `myString` that starts with the number 5. We then create a regular expression `/^\d/` that matches any string that starts with a digit (`\d`).