C equivalent to fstream's peek

I know in C++, you're able to peek at the next character by using: in.peek();.

How would I go about this when trying to "peek" at the next character of a file in C?


fgetc+ungetc. Maybe something like this:

int fpeek(FILE *stream)
    int c;

    c = fgetc(stream);
    ungetc(c, stream);

    return c;

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Removing elements with Array.map in JavaScript

javascript data-structures functional-programming client-scripting data-manipulation

I would like to filter an array of items by using the map() function. Here is a code snippet:

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