mattes

if _, err := os.Stat("/path/to/whatever"); os.IsNotExist(err) {
	// path/to/whatever does not exist
}

if _, err := os.Stat("/path/to/whatever"); !os.IsNotExist(err) {
	// path/to/whatever exists
}

ik5

package main
// http://play.golang.org/p/jZ5pa944O1 <- will not display the colors
import "fmt"

const (
        InfoColor    = "\033[1;34m%s\033[0m"
        NoticeColor  = "\033[1;36m%s\033[0m"
        WarningColor = "\033[1;33m%s\033[0m"
        ErrorColor   = "\033[1;31m%s\033[0m"
        DebugColor   = "\033[0;36m%s\033[0m"

looopTools

    inline std::vector<uint8_t> read_vector_from_disk(std::string file_path)
    {
        std::ifstream instream(file_path, std::ios::in | std::ios::binary);
        std::vector<uint8_t> data((std::istreambuf_iterator<char>(instream)), std::istreambuf_iterator<char>());
        return data;
}