customizable letter replacer

Question

I\'ve been working on an app that pretty much replaces letters. So you\'ll have a letter and an input box. The letter reprecents what letter will be replaced, and you write what

Answer 1

When you declare your customizing properties, you're passing them a property name, thinking they'll be the same value as the variables that are named the same way. This can't be done inside of object declarations, since the property names will be taken as strings. You have to set them outside of the object, with square bracket notation.

However, in ECMAScript 6, you're/will be able to set them inside of the object, like this:

var prop = "foo";
var o = {
  [prop]: "hey",
  ["b" + "ar"]: "there"
};

Currently supported only by Firefox and Safari

Also, the function name of translate seems to throw an error in Chrome, not sure why, perhaps it is reserved for something else? I changed its name to trans.

Take a look:

http://jsfiddle.net/L2Lackjc/1/

// My globals
var output = $("#output");
var extra_customizing = $("#extra-customizing");

String.prototype.cap = function () { // needed or demonstration
    return this.charAt(0).toUpperCase() + this.slice(1);
};

function trans() {
    var input = $("#input");
    var value = input.val();

    // Retriving #customizing
    /*
      I retrieve the values of the input boxes, in order to replace them later
    */
    // needed or demonstration
    var IDa = $("#a").val();
    var IDb = $("#b").val();
    var IDc = $("#c").val();
    var IDd = $("#d").val();

    // Retriving #extra-customizing
    /*
      Using the same logic as the other ones
    */
    var ID_ax = $("#Ax").val(); // input
    var ID_ay = $("#Ay").val(); // output
    var ID_bx = $("#Bx").val(); // input
    var ID_by = $("#By").val(); // output
    var ID_cx = $("#Cx").val(); // input
    var ID_cy = $("#Cy").val(); // output
    /*
      If the user inputs something to replace, they MUST have something to to replace it with(may change later)
    */
    if (ID_ax != "" && ID_ax == "") {
        alert("You have not insterted a value in #1");
    }
    if (ID_bx != "" && ID_bx == "") {
        alert("You have not insterted a value in #2");
    }
    if (ID_cx != "" && ID_cx == "") {
        alert("You have not insterted a value in #3");
    }

    // Setting
    var mapObj = {
        // Setting #customizing
        /*
          I first select what the user would write, and the what it should be replaced with
        */
        a: IDa,
        b: IDb,
        c: IDc,
        d: IDd,
        A: IDa.cap(),
        B: IDb.cap(),
        C: IDc.cap(),
        D: IDd.cap()
    };
    
    // Extra customizing
    mapObj[ID_ax] = ID_ay;
    mapObj[ID_bx] = ID_by;
    mapObj[ID_cx] = ID_cy;
    
    // Translating
    /*
      Below is the code used to replace letters
    */
    var re = new RegExp(Object.keys(mapObj).join("|"), "g");
    console.log(re);
    value = value.replace(re, function (matched) {
        return mapObj[matched];
    });
    output.val(value);
}

body {
  background-color: #cccccc;
  color: #444444;
}

hr {
  width: 60%;
  background-color: #999999;
  border: none;
  padding: 0;
  margin: 0 auto 0 auto;
}

#customizing {
  font-family: "courier";
  width: calc(50em + 195px);
  width: -moz-calc(50em + 195px);
  margin: auto;
  font-size: .8em;
}

#extra-customizing {
  font-family: "courier";
  width: calc(55em + 282px);
  width: -moz-calc(55em + 282px);
  margin: auto;
  font-size: .8em;
  margin-top: .5em;
  padding-top: .5em;
  padding-left: .5em;
  padding-right: .5em;
  border-radius: 2px;
}

#customizing input, #extra-customizing input {
  font-family: "courier";
  width: 3em;
  margin-left: 5px;
  margin-right: 10px;
  font-family: "courier";
  text-align: center;
  font-size: .8em;
  padding-bottom: .3em;
  padding-top: .2em;
  background-color: #111111;
  color: #aaaaaa;
  border: none;
  border-radius: 2px;
  margin-bottom: 1em;
}

#extra-customizing input {
  margin-right: 15px;
}

#translator {
  width: 100%;
}


#extra-customize {
  width: 320px;
  margin: .2em auto 1em auto;
}

#extra-customize input {
  border: none;
  padding: 0;
  margin: 0;
  width: 1em;
  height: .9em;
}

#input {
  width: 40%;
  height: 40vh;
  float: left;
  padding: .43%;
  margin: 0;
  margin-left: 5%;
  border: none;
  background-color: #111111;
  color: #aaaaaa;
  border-radius: 2px;
  font-size: 1em;
  outline: none;
  resize: none;
  overflow: auto;
}

#inputB {
  font-family: "courier";
  width: 8.28%;
  padding: 0;
  margin: 0;
  padding-top: 3px;
  padding-bottom: 3px;
  border: none;
  background-color: #1f1f1f;
  color: #aaaaaa;
  border-radius: 2px;
  font-size: .8em;
  resize: none;
  cursor: pointer;
  outline: none;
}

#inputB:hover {
  background-color: #aaaaaa;
  color: #1f1f1f;
}

#output {
  width: 40%;
  height: 40vh;
  float: right;
  padding: .43%;
  margin: 0;
  margin-right: 5%;
  border: none;
  background-color: #111111;
  color: #aaaaaa;
  border-radius: 2px;
  font-size: 1em;
  outline: none;
  resize: none;
  overflow: auto;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="customizing">
  a<input type="text" id="a" value="a" maxlenght="3">
  b<input type="text" id="b" value="b" maxlenght="3">
  c<input type="text" id="c" value="c" maxlenght="3">
  d<input type="text" id="d" value="d" maxlenght="3">
</div>

<hr>

<div id="extra-customizing">
  1<input type="text" id="Ax" value="" maxlength="5">:<input type="text" id="Ay" value="" maxlength="7">
  2<input type="text" id="Bx" value="" maxlength="5">:<input type="text" id="By" value="" maxlength="7">
  3<input type="text" id="Cx" value="" maxlength="5">:<input type="text" id="Cy" value="" maxlength="7">
</div>

<div id="translator">
  <textarea id="input"></textarea>
  <input type="button" value="Translate" id="inputB" onclick="trans()">
  <textarea id="output" readonly></textarea>
</div>