Using for_each to increment array elements?

Asked Mar 27 '22 at 04:37

Active Mar 27 '22 at 04:37

Viewed 40 times

Say I have the following:

int a[] = { 1, 2, 3, 4, 5 };
int x = something;

It is possible to use for_each to increment the elements of the array by x? I was thinking of something like:

for_each(a, a + 5, [](int& item) { item += x; });

But as far as I understand, the third parameter in for_eachis a unary function so there's no way to pass x into it.

asked Mar 27 '22 at 04:37

Tony Zhang

4

You can _capture_ `x` by writing the lambda as `[x](int& item) { item += x; }` – Patrick Roberts Mar 27 '22 at 04:40
Any particular reason for not using the traditional for/for-each loop? – kesarling He-Him Mar 27 '22 at 05:36
1

`a, a + 5` -> `std::begin(a), std::end(a)`. – Evg Mar 27 '22 at 05:41
@PatrickRoberts That did it. Thanks! – Tony Zhang Mar 28 '22 at 06:28

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