how to combine multiple sub-arrays that contain same objects' keys?

merge two arrays alternatively in javascript
javascript merge array of objects
merge multiple arrays javascript
javascript merge array of objects by key
merge two array of objects javascript es6
merge two arrays alternatively in c
typescript merge arrays
angular merge two arrays

Can someone help me with this, please? I've spent a long time trying to figure it out. I have the following format:

[
  [{id:'1',venue:'foa',title:'t'},{id:'5',venue:'cs',title:'b'}, ...],
  [{id:'2',venue:'fob',title:'t'},{id:'6',venue:'cs',title:'b'}, ...],    
  [{id:'3',venue:'foc',title:'t'},{id:'7',venue:'cs',title:'b'}, ...],
  [{id:'4',venue:'fod',title:'t'},{id:'8',venue:'cs',title:'b'}, ...]
]

what is the simplest way to make it in this format (._underscore preferably):

{id:'1',venue:'foa',title:'t'}
{id:'5',venue:'cs',title:'b'}
{id:'2',venue:'fob',title:'t'}
{id:'6',venue:'cs',title:'b'}
{id:'3',venue:'foc',title:'t'}
{id:'7',venue:'cs',title:'b'}
{id:'4',venue:'fod',title:'t'}
{id:'8',venue:'cs',title:'b'}

You can use flatten().

var arr = [[{id:'1',venue:'foa',title:'t'},{id:'5',venue:'cs',title:'b'}],[{id:'2',venue:'fob',title:'t'},{id:'6',venue:'cs',title:'b'}],    [{id:'3',venue:'foc',title:'t'},{id:'7',venue:'cs',title:'b'}],[{id:'4',venue:'fod',title:'t'},{id:'8',venue:'cs',title:'b'}]],
    result = _.flatten(arr);
console.log(result);
<script src="https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.9.1/underscore-min.js"></script>

Merging elements of two different arrays alternatively in third array , It contains well written, well thought and well explained computer science and Given two arrays arr1[] and arr2[], we need to combine two arrays in such a way If one array has extra element, then these elements are appended at the end of Sort elements by frequency | Set 1 · Median of two sorted arrays of same size  Merge arrays into a new object array in Java Given two arrays of the same type, they need to be merged into a new object array. The task is to merge the two arrays of the same type into an object array such that the array elements maintain their original order in the newly merged array and the elements of the first array precedes the elements of the second array in the merged object array.


Your question is not clear enough but if you just want to flatten your array, you can use the below code:

var arr = [
  [{id:'1',venue:'foa',title:'t'},{id:'5',venue:'cs',title:'b'}],
  [{id:'2',venue:'fob',title:'t'},{id:'6',venue:'cs',title:'b'}],   
  [{id:'3',venue:'foc',title:'t'},{id:'7',venue:'cs',title:'b'}],
  [{id:'4',venue:'fod',title:'t'},{id:'8',venue:'cs',title:'b'}]
];

var res = [].concat(...arr);

console.log(res);

Merge intersecting sub-arrays, I find several issues with the current implementation: Convert each array to a Set; Initialize an empty object, to be used as a map of At this point pools has all the items in all the input arrays as keys, pointing to sets that have the values merged. Keys in the same pool all point to the set, so there are no  Combine two one-dimensional arrays into a single array. Use List, AddRange, Array.Copy and Buffer.BlockCopy. Here: We use the List type, and call the AddRange () and ToArray methods to get the combined array. List: The program uses the List type to provide a level of abstraction over the actual copying to the new array.


I'm not sure what exactly you want but here's what you can try using Lodash:

var result = [];

var obj = [
  [{id:'1',venue:'foa',title:'t'},{id:'5',venue:'cs',title:'b'}],
  [{id:'2',venue:'fob',title:'t'},{id:'6',venue:'cs',title:'b'}],    
  [{id:'3',venue:'foc',title:'t'},{id:'7',venue:'cs',title:'b'}],
  [{id:'4',venue:'fod',title:'t'},{id:'8',venue:'cs',title:'b'}]
];

_.each(obj, function(i) {

  _.each(i, function(j) {
    result.push(j);
  });

});

console.log(result);
<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.10/lodash.js"></script>

2 Ways to Merge Arrays in JavaScript, Here are 2 ways to combine your arrays and return a NEW array. Since I don't really have a substantial reason besides aesthetics, I think you and your team  Sometimes it will be great to have handy utility ready which combines two or multiple JSONObjects. Here is simple Java example which shows the same. Here is simple Java example which shows the same. CrunhifyMergeJSONObjects.java


Foundations of Algorithms Using Java Pseudocode, By two-way merging we mean combining two sorted arrays into one sorted array. For example, to sort an array of 16 items, we can divide it into two subarrays, In the same way, each subarray of size 8 can be divided into two subarrays of size Suppose the array contains these numbers in sequence: 27 10 12 20 25 13  Use the Attach button to permanently fuse or join objects: With a single Editable Mesh or Editable Poly object selected, go to the Command Panel > Modify > Edit Geometry > Attach button. This will allow you to pick single or multiple objects to attach into a single object.


Foundations of Algorithms Using C++ Pseudocode, By two-way merging we mean combining two sorted arrays into one sorted array. For example, to sort an array of 16 items, we can divide it into two subarrays, In the same way, each subarray of size 8 can be divided into two subarrays of size Example 2.2 Suppose the array contains these numbers in sequence: 27 10  Thank you Carl. I guess this works by specifying one initial saved .RData file and adding on to this file other R objects, but I think to apply it to my case I would need to apply this function to each of the .RData files in turn, each time loading an .RData file, changing the names of the objects so that I know which file the data frames came from (all of my .RData files load a data frame


Object-oriented Data Structures Using Java, Merging two of those subarrays into a subarray of size 2 requires 0(1 + 1) this merge operation a total of N times (we have N one-element subarrays and we The same reasoning leads us to conclude that each of the other levels of merging​  Applies a reduce function with the initial accumulator value set to an empty array. The reduce function uses concat to append each sub-array onto the accumulator array. The result of this is passed as a constructor parameter to create a new Set. The spread operator is used to convert the Set to an array. The sort()