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Replace multiple values ​​in a string based on find / replace pairs

How to replace values ​​as an array by replacing in javascript.

I want to do a number replacement (for example) together. like this?

1

-replace whit-> 11


2

-replace whit->22

DEMO: http://jsfiddle.net/ygxfy/

<script type="text/javascript">
    var array = {"1":"11", "2":"22"}
    var str="13332";
    document.write(str.replace(array));
</script>​
+3


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5 answers


You need to create a template using RegEx and then pass it to the method .replace

.



var array = {"1":"11", "2":"22"}; // <-- Not an array btw.
// Output. Example: "1133322"
document.write( special_replace("13332", array) );

function special_replace(string_input, obj_replace_dictionary) {
    // Construct a RegEx from the dictionary
    var pattern = [];
    for (var name in obj_replace_dictionary) {
        if (obj_replace_dictionary.hasOwnProperty(name)) {
            // Escape characters
            pattern.push(name.replace(/([[^$.|?*+(){}\\])/g, '\\$1'));
        }
    }

    // Concatenate keys, and create a Regular expression:
    pattern = new RegExp( pattern.join('|'), 'g' );

    // Call String.replace with a regex, and function argument.
    return string_input.replace(pattern, function(match) {
        return obj_replace_dictionary[match];
    });
}
+5


source


http://jsfiddle.net/mendesjuan/uHUs9/

You can pass a function to replace method



RegExp.escape = function(text) {
    return text.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, "\\$&");
}

String.prototype.mapReplace = function (replacements) {
    var regex = [];

    for (var prop in replacements) {
        regex.push(RegExp.escape(prop));
    }

    regex = new RegExp( regex.join('|'), "g" );

    return this.replace(regex, function(match){
      return map[match];
    });
}


var map = {"1":"11", "2":"22"};    
var str="13332";

document.write(str.mapReplace(map));​
+3


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var str = "13332",
    map = {"1":"11", "2":"22"};

str.split("").map( function(num ){
    return map.hasOwnProperty(num) ? map[num] : num;
}).join("");

//"1133322"
+1


source 


<script type="text/javascript">
    var rep = {"1":"11", "2":"22"}
    var str="13332";

    for (key in rep) {
        str = str.split(key).join(rep[key]);
    }

    document.write(str);
</script>​
0


source


How to use the function reduce

?

<script type="text/javascript">
  var array = {"1":"11", "2":"22"};
  var str = "13332";

  str = Object.keys(array).reduce(function(result, key) {
    return result.replace(new RegExp(key, 'g'), array[key]);
  }, str);

  document.write(str);
</script>
0


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