Hi I'm trying to perform _.find using underscore function. When I tried to execute it, it returns undefined, but all my string search from this object is always there. Please find below my sample data structure:

oArrays = [
  { 
    "c":"ABC", 
    "sc":[
      { "name":"ABC123", "t1":0, "t2":0 },
      { "name":"ABC456", "t1":0, "t2":0 },
      { "name":"ABC789", "t1":0, "t2":0 }
    ] 
  },
  { 
    "c":"BCDEF", 
    "sc":[
      { "name":"JJHS", "t1":0, "t2":0 },
      { "name":"JKHJYH", "t1":0, "t2":0 },
      { "name":"DKJHKJ", "t1":0, "t2":0 }
    ] 
  },
  { 
    "c":"ZYXV", 
    "sc":[
      { "name":"KDSKD", "t1":0, "t2":0 },
      { "name":"PWIFGF", "t1":0, "t2":0 },
      { "name":"WWSD", "t1":0, "t2":0 }
    ] 
  }, 
]

_.find(oArrays, function(item){
   return item.sc.name==="ABC123" ;
});

the above codes doesn't worked, result is undefined.... Is it possible to execute it in one _.find function only?

I tried to used multiple _.map function, it works. But as much as possible I dont want to use it coz it will have too many loops. (sample below)

_.map(oArrays, function(item){
  _.find( item.sc, function( item2 ) {
    return item2.name==="ABC123" ;
  });
});

Ooops, btw I'm executing these codes using sails-controller.

really appreciate any help :)

Thanks in advance!

Hi I'm trying to perform _.find using underscore function. When I tried to execute it, it returns undefined, but all my string search from this object is always there. Please find below my sample data structure:

oArrays = [
  { 
    "c":"ABC", 
    "sc":[
      { "name":"ABC123", "t1":0, "t2":0 },
      { "name":"ABC456", "t1":0, "t2":0 },
      { "name":"ABC789", "t1":0, "t2":0 }
    ] 
  },
  { 
    "c":"BCDEF", 
    "sc":[
      { "name":"JJHS", "t1":0, "t2":0 },
      { "name":"JKHJYH", "t1":0, "t2":0 },
      { "name":"DKJHKJ", "t1":0, "t2":0 }
    ] 
  },
  { 
    "c":"ZYXV", 
    "sc":[
      { "name":"KDSKD", "t1":0, "t2":0 },
      { "name":"PWIFGF", "t1":0, "t2":0 },
      { "name":"WWSD", "t1":0, "t2":0 }
    ] 
  }, 
]

_.find(oArrays, function(item){
   return item.sc.name==="ABC123" ;
});

the above codes doesn't worked, result is undefined.... Is it possible to execute it in one _.find function only?

I tried to used multiple _.map function, it works. But as much as possible I dont want to use it coz it will have too many loops. (sample below)

_.map(oArrays, function(item){
  _.find( item.sc, function( item2 ) {
    return item2.name==="ABC123" ;
  });
});

Ooops, btw I'm executing these codes using sails-controller.

really appreciate any help :)

Thanks in advance!

• javascript
• node.js
• underscore.js
• sails.js

1 Answer 1

item.sc.name is never a string, as you're trying to pare it to. In fact, it's actually undefined. But item.sc is an array of objects with the name property.

You have to check if among the name properties there's what you're looking for:

_.find(oArrays, function(item) {
    return _.contains(_.pluck(item.sc, "name"), "ABC123");
});