可定制的字母替换器

Question

我一直在开发一个应用程序，它可以很好地代替字母。所以你会有一封信和一个输入框。这封信表示要替换什么字母，然后在输入框中写出您想要替换的内容。为此，我使用regex和对象。

如果你像“匿名者”一样徘徊，到底有什么不对：

@julianavar有什么不管用的？你有什么具体的问题？-匿名

以下是答案：

@匿名#额外-定制不起作用。让我们简单地说，您决定在#外设中替换以下内容:a用b，b用c，c用d，不要改变其他任何东西。现在输入"abcd“点击翻译，你会看到#额外-定制不会覆盖#定制-朱利安·阿瓦尔

问题是，，如果您想将用户选择的任何内容替换为用户选择的任何，怎么办？

下面的代码包括coment来简化，也是整体简化的。我添加CSS是为了创建某种顺序。

为了让您了解我所讲的内容，下面是链接http://codepen.io/julian-a-avar/debug/BywZYL。

或者你可以在这里查看：

​

// 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 translate() {
  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(),

    // Setting #extra-customizing
    /*
      I'm trying to use the same logic, but it is unsuccesful
    */
    ID_ay: ID_ax,
    ID_by: ID_bx,
    ID_cy: ID_cx
  }; 

  // Translating
  /*
    Below is the code used to replace letters
  */
  var re = new
  RegExp(Object.keys(mapObj).join("|"),"g");
  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="translate()">
  <textarea id="output" readonly></textarea>
</div>

​

Answer 1

当您声明自定义属性时，您将传递它们一个属性名称，认为它们将是与以相同方式命名的变量相同的值。这不能在对象声明中完成，因为属性名称将被视为字符串。您必须将它们设置在对象之外，用方括号符号表示。

但是，像这样的, you're/will be able to set them inside of the object：

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

目前只有Firefox和Safari支持

另外，translate的函数名似乎在Chrome中抛出了一个错误，不知道为什么，也许它是为其他什么东西保留的？我把它的名字改成了trans。

看一看：

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>

​