What is the exact syntax to push data using the above given syntax?

1 Answer 1


I would do as follow:

mapping(address=>address[]) addressToMany;
function addAddress(address _address) public {
  • It worked for my contract perfectly. There is another query related to this, is how to delete data/pop data after pushing it to an array.
    – Rudrika
    Apr 30, 2019 at 13:02
  • @Rudrika You're welcome :). To delete the data you can use the delete statement as follow: delete array[index]; Apr 30, 2019 at 13:09
  • I am working with double mapping and address => address[] mapping.
    – Rudrika
    Apr 30, 2019 at 13:22
  • I am working with double mapping and address => address[] mapping. Where in first mapping I am storing every address who belongs to one common address using double mapping. And now I am storing those addresses in one array using the above-given solution. The problem is here I am not able to identify indexes of array. myAddressMapping[commonAddress][subAddresses] and I want to delete that particular subAddress which has 0 balance.
    – Rudrika
    Apr 30, 2019 at 13:30
  • @Rudrika If I understand correctly, you want to delete the address which has 0 as balance. You can do a for loop and search for it as following: for(uint i = 0; i < addressToMany[msg.sender].length; i++){ // if statement to check if address has balance 0 delete addressToMany[msg.sender][i] Apr 30, 2019 at 13:46

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