filter array with callback function

Question

I got some problem with this function Search program names that can be limited in the number of outputs that implement callback functions. hope you can help me figure out

function filteritem(str,num,callback){
  let result = name.filter( name => name.indexOf(str) !== -1 )
   result.forEach(element => element.length == num)
  callback(result);
}
function showFilter(wrd){
  console.log(wrd);
}
console.log(filteritem("a",3,showFilter))

My output is :

[
  'Abigail',  'Alexandra',
  'Amanda',   'Angela',
  'Bella',    'Carol',
  'Caroline', 'Carolyn',
  'Diana',    'Elizabeth',
  'Ella',     'Faith',
  'Olivia'
]
undefined

The output I want is :

["Abigail", "Alexandra", "Alison"];

Prime · Accepted Answer · 2020-11-14 08:29:27Z

1

const name = [
  "Abigail",
  "Alexandra",
  "Amanda",
  "Angela",
  "Bella",
  "Carol",
  "Caroline",
  "Carolyn",
  "Diana",
  "Elizabeth",
  "Ella",
  "Faith",
  "Olivia",
];
function filteritem(str, num, callback) {
  let result = name.filter((name) => name.indexOf(str) !== -1);
  result = result.slice(0, 3);
  callback(result);
}
function showFilter(wrd) {
  console.log(wrd);
}
filteritem("a", 3, showFilter);

answered Nov 14, 2020 at 8:29

Prime

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Comments

Brian Lee · Accepted Answer · 2020-11-14 08:37:40Z

0

What do you expect to achieve with your forEach call? You're iterating over the results array, and actually do nothing (your function returns a boolean: true if length == 3, false if not).

What you want to do is return the first 3 elements of result:

callback(result.slice(0, 3));

edited Nov 14, 2020 at 8:37

Brian Lee

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answered Nov 14, 2020 at 8:29

Traveling Tech Guy

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