Build a tiny version of the Unix wc command. Given a list of lines, return the total number of lines as an integer.
Function signature:
countLines(lines: string[]): number
Example:
Input: lines = ["hello", "world", "foo", "bar", "baz"] Output: 5
Every entry of the list is one line, even an empty string "". An empty list has 0 lines.
The number of lines is just the length of the input array. Use the array's
length property — no loop needed.
A one-liner:
class Solution {
countLines(lines: string[]): number {
return lines.length;
}
}
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