findAtFirstAndChangeSecond.cc

#include <iostream>
#include <map>
#include <vector>
#include <string>
#include <algorithm>

void findAtFirstAndChangeSecond(
	std::vector<std::pair<std::string, std::string>>& v,
	const std::string key,
	const std::string val
) {
	auto it = std::find_if(v.begin(), v.end(),
                   [&key](const std::pair<std::string, std::string>& p)
                   { return p.first == key; });
	if (it != v.end()) { it->second = val; }
}

int main(int argc, char *argv[]) {
	std::vector<std::pair<std::string, std::string>> properties;

	properties.emplace_back("ro.board.test", "1");
	properties.emplace_back("ro.foo", "bar");
	properties.emplace_back("ro.debuggable", "1");
	properties.emplace_back("ro.gogo", "0");
	properties.emplace_back("ro.dededede", "f00d");
	properties.emplace_back("ro.dead", "beef");

	//findAtFirstAndChangeSecond(properties, "ro.debuggable", "0");

	for (const auto& [name, value] : properties) {
        	std::cout << "[" << name << "]: [" << value << "]" << std::endl;
    	}

	return 0;
}