/*
This program wraps a string into lines of maximum width w.
Method:
- Split the input text into words using split().
- Build each line until adding another word would exceed the width.
- When the limit is reached, store the line and begin a new one.
- Uses arrays and string operations for clear and efficient processing.
*/
function wrapText(text: string, w: number): string {
const words: string[] = text.split(/\s+/); // Split on whitespace
let line: string = "";
const result: string[] = [];
for (const word of words) {
const currentWord: string = word;
// If line is empty, start it with the word
if (line.length === 0) {
line = currentWord;
}
else {
// Check if adding the next word exceeds width
if (line.length + 1 + currentWord.length <= w) {
line += " " + currentWord;
} else {
// Store the completed line
result.push(line);
line = currentWord;
}
}
}
// Add the final line
if (line.length > 0) {
result.push(line);
}
return result.join("\n");
}
// Usage
const sample: string =
"TypeScript provides useful built-in tools for handling strings. " +
"This program demonstrates how to wrap text cleanly and efficiently.";
const wrapped: string = wrapText(sample, 35);
console.log(wrapped);
/*
run:
TypeScript provides useful built-in
tools for handling strings. This
program demonstrates how to wrap
text cleanly and efficiently.
*/
