Work with value ranges

Use range expressions.

Bad Code

function processData(string[] data) {
    int index = 0;
    foreach var val in data {
        index += 1;
        if (index == 1) {
            continue; // Need to skip the first value in array
        }
        io:println(val);
    }
}

• Need to maintain a separate index.
• Need to check whether the value equals to 1 in each iteration.

Good Code

function processData(string[] data) {
    foreach int lineNo in 1 ..< data.length() {
        io:println(data[lineNo]);
    }
}

See Also:

• foreach statement