HWilliamgo

object StringProducer {
    fun produce(): String? {
        return "abc"
    }
}

fun main() {
    StringProducer.produce()?.let {
        println(it)
    } ?: run {

HWilliamgo

/**
 * 在[range]范围内生成一个正的随机数
 * @param   range 范围
 * @return  随机数
 */
static int randomNum(int range) {
  	// 用当前时间戳生成随机数种子
    time_t seed = time(0);
  	// 将随机数种子填写到随机数生成器里面
    srand(seed);

HWilliamgo

pthread_cond_t *condv = nullptr;
pthread_mutex_t *mlock = nullptr;

static data *phead = nullptr;

static void initLock() {
    condv = new pthread_cond_t;
    mlock = new pthread_mutex_t;
    pthread_mutex_init(mlock, nullptr);
    pthread_cond_init(condv, nullptr);

HWilliamgo

Java       29 hrs 6 mins  ███████████████▏░░░░░  72.5%
Groovy     3 hrs 49 mins  ██░░░░░░░░░░░░░░░░░░░   9.5%
C          3 hrs 37 mins  █▉░░░░░░░░░░░░░░░░░░░   9.0%
Text       1 hr 5 mins    ▌░░░░░░░░░░░░░░░░░░░░   2.7%
Bash       36 mins        ▎░░░░░░░░░░░░░░░░░░░░   1.5%