/* Align columns, in Jsish */
function alignColumns(phrases:array, just:string) {
    var x, y, max, diff, left, right, cols=0;

    for(x=0; x<phrases.length; x++) {
        phrases[x] = phrases[x].split("$");
        if (phrases[x].length>cols) cols=phrases[x].length;
    }

    for (x=0; x<cols; x++) {
        max = 0;
        for (y=0; y<phrases.length; y++) if (phrases[y][x] && max<phrases[y][x].length) max = phrases[y][x].length;
        for (y=0; y<phrases.length; y++) {
            if (phrases[y][x]) {
                diff = (max-phrases[y][x].length)/2;
                left = " ".repeat(Math.floor(diff));
                right = " ".repeat(Math.ceil(diff));
                if (just == "left") { right += left; left=""; }
                if (just == "right") { left += right; right=""; }
                phrases[y][x] = left + phrases[y][x] + right;
            }
        }
    }
    for (x=0; x<phrases.length; x++) phrases[x] = phrases[x].join(" ");
    phrases = phrases.join("\n");
    return phrases;
}

if (Interp.conf('unitTest')) {
    var phrases = ["Given$a$text$file$of$many$lines,$where$fields$within$a$line$",
        "are$delineated$by$a$single$'dollar'$character,$write$a$program",
        "that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$",
        "column$are$separated$by$at$least$one$space.",
        "Further,$allow$for$each$word$in$a$column$to$be$either$left$",
        "justified,$right$justified,$or$center$justified$within$its$column."];

    for (var just of ['left', 'center', 'right']) {
        var trial = phrases.slice(0);
        puts(just);
        puts(alignColumns(trial, just), '\n');
    }
}