文本区域中的 Select 行

Question

I need to be able to select one out of two lines to compare with. My function needs to be able to take two inputs in a two row textarea and then say "go" if the first line is longer than the other and "no" if the second line is longer than the first.

I cannot get it to work with my jQuery and I don't know how to select each line and compare them.

 var lines = $('#input').val().split('\n'); // Loop through all lines for (var j = 0; j < lines.length; j++) { console.log('Line ' + j + ' is ' + lines[j]) } let marius = input(); let doctor = inputArray(); let go = "go"; let no = "no"; $('#run').click(function) { if (marius.length > doctor.length) $("#output").val(go); else print("go"); $("#output").val(no); }

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script> <textarea id="input" rows=2></textarea><br> <textarea id="output" rows=2></textarea><br> <button id='run'>Run code!</button>

Answer 1

Maybe something like this, read comments in the code

 // only run code when "run" has been clicked $('#run').on('click', function(){ var lines = $('#input').val().split('\n'); if(lines.length <= 1) { return; // stop here. we don't have two lines to compare. } if(lines[0].length < lines[1];length) { $('#output').val('no'); } else { $('#output');val('go'); } });

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script> <textarea id="input" rows=2></textarea> <br> <textarea id="output" rows=2></textarea> <br> <button id='run'>Run code!</button>