Get Programming with JavaScript

Get Programming with JavaScript - Listing 7.10

Listing 7.10 - Organizing functions as object properties

var spacer = {
    blank: function () {
        return "";
    },

    newLine: function () {
        return "\n";
    },

    line: function (length, character) {
        var longString = "****************************************";
        longString += "----------------------------------------";
        longString += "========================================";
        longString += "++++++++++++++++++++++++++++++++++++++++";
        longString += "                                        ";

        length = Math.max(0, length);
        length = Math.min(40, length);
        return longString.substr(longString.indexOf(character), length);
    },

    wrap : function (text, length, character) {
        var padLength = length - text.length - 3;
        var wrapText = character + " " + text;
        wrapText += spacer.line(padLength, " ");
        wrapText += character;
        return wrapText;
    },

    box: function (text, length, character) {
        var boxText = spacer.newLine();
        boxText += spacer.line(length, character) + spacer.newLine();
        boxText += spacer.wrap(text, length, character) + spacer.newLine();
        boxText += spacer.line(length, character) + spacer.newLine();
        return boxText;
    }
};

console.log(spacer.box("Mercury", 11, "="));
console.log(spacer.box("Mars", 11, "*"));

Further Adventures

Listing 7.10 - Organizing functions as object properties - Task 1

Change the Spacer.box function so that the box is 5 lines high.

var spacer = {
    blank: function () {
        return "";
    },

    newLine: function () {
        return "\n";
    },

    line: function (length, character) {
        var longString = "****************************************";
        longString += "----------------------------------------";
        longString += "========================================";
        longString += "++++++++++++++++++++++++++++++++++++++++";
        longString += "                                        ";

        length = Math.max(0, length);
        length = Math.min(40, length);
        return longString.substr(longString.indexOf(character), length);
    },

    wrap : function (text, length, character) {
        var padLength = length - text.length - 3;
        var wrapText = character + " " + text;
        wrapText += spacer.line(padLength, " ");
        wrapText += character;
        return wrapText;
    },

    box: function (text, length, character) {
        var boxText = spacer.newLine();
        boxText += spacer.line(length, character) + spacer.newLine();

        boxText += spacer.wrap(spacer.blank(), length, character) + spacer.newLine();

        boxText += spacer.wrap(text, length, character) + spacer.newLine();

        boxText += spacer.wrap(spacer.blank(), length, character) + spacer.newLine();

        boxText += spacer.line(length, character) + spacer.newLine();
        return boxText;
    }
};

console.log(spacer.box("Mercury", 11, "="));
console.log(spacer.box("Mars", 11, "*"));