Exploring the World of Metaprogramming with AngularJS Filters

Can we generate filters dynamically in Angular? Below are some basic filters that extract specific properties from an array of objects.

module.filter("firstAndLastName", function() {
    return function(input) {
        return input.map(function(obj) {
            return obj.first_name + " " + obj.last_name
        });
    }
})

module.filter("gradYear", function() {
    return function(input) {
        return input.map(function(obj) {
            return obj.grad_year
        });
    }
})

If we need to retrieve the "email_address" from an array of objects and use it, is there a way to dynamically create it during runtime?

module.controller("someController", ["emailAddressFilter",
    function(emailAddressFilter) {
        // utilize emailAddressFilter here
    }
])

An inquiry about Angular components

Is there a method to dynamically generate Angular components?

Answer №1

Remember that Javascript is a language where everything is created at runtime.

Here is an alternative to the traditional method of creating filters:

module.filter("whatEverFilter", function() { 
  //stringArray can be eg : ["first_name","last_name"]
  return function(input, stringArray) {
    return input.map(function(obj) {  
      var strReturn = obj[stringArray[0]]
      for(var i=1; i<stringArray.length ;i++){
          strReturn += " ";
          strReturn += obj[stringArray[i]];
      }
      return strReturn;
    });
  }
})

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