CODEWITHSUNDEEP
c++arrays
Md. Parwez Akhtar
Md. Parwez Akhtar

Reputation: 176

Creating and filling array dynamically

I have an array which is to be filled using an object like this - 

const std::map<Id, std::vector<Data>> *const DataSets[]=
{
    &object.data1,
    &object.data2,
    &object.data3,
    &object.data4
};

Condition here is, If object.data1.size() == 0 I dont want to push it into array. in that case I want to fill my array like this -

const std::map<Id, std::vector<Data>> *const DataSets[]=
{
    &object.data2,
    &object.data3,
    &object.data4
};

UPDATE I am using std::vector instead of array now and trying to initialize vector in same as array - 

const std::vector<std::map<Id, std::vector<Data>>> *const DataSets
{
    &object.data1,
    &object.data2,
    &object.data3,
    &object.data4
};

I am getting error: E0146 too many initializer values. Can't I initialize my vector in this way? If not can anyone please suggest how to do that?

Thanks in advance!

Upvotes: 1

Views: 84

Answers (2)

463035818_is_not_an_ai
463035818_is_not_an_ai

Reputation: 122228

[...] since my further logic depends upon this arraya and the code is long back implemented...thatswhy not using vector

Thats not a good reason for not using a vector. If you ever need a c-array you can still use std::vector::data() in combination with std::vector::size(). There is (almost) no good reason to prefer a c-array to a std::vector, even if you need c-arrays in some places.

Upvotes: 1

Ext3h
Ext3h

Reputation: 6393

You don't do that.

Respectively you don't use C style plain arrays if you want to do anything dynamic. You just wrap it in yet another std::vector because that supports dynamic sizes.

Upvotes: 1

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