null它是某事的一个例子吗？- 它属于什么类型
null？ - 是什么
null？ - 它在记忆中是如何表现的？
对“Java 中什么是 null？”这个问题的松散翻译。来自@unj2。
例如，*以下代码中 (asterisk) 的作用是：
print(*min(p for p in counter.items() if p[1] == max_count))
print(*team, *coef)
seasons = [datetime(*args) for args in [
(Y, 1, 1), # winter
(Y, 3, 1), # spring
(Y, 6, 1), # summer
(Y, 9, 1), # autumn
(Y, 12, 1) # winter
]]
def lcm(*args):
"""Least common multiple."""
return reduce(lambda a, b: a * b // gcd(a, b), args)
async def watchdog(loop, last_activity_time, timeout, func, *args):
"Run *func(*args)* if more than *timeout* seconds since *last_activity_time*."
while (loop.time() - last_activity_time()) < timeout:
await asyncio.sleep(1)
return func(*args)
两个**星号的作用是什么：
'{a:.{n}f}'.format(**vars())
class A:
def __init__(self, a, **kwargs):
super().__init__(**kwargs)
招待会结束，感谢大家的参与！
您可以留下您的决定，但获胜者已经选出，不会重新计票。
问候。
任务：编写一个函数，从任意输入数组中选择所有数字组合，其总和等于 10。
更多详细信息：
数字范围：0 - 1000（含）。
输入数组中的数字数：1 - 10（含）。
已经选择的号码可以多次使用，但组合必须是唯一的。
---改变位置不会使组合唯一，即[1,9]不允许[9,1]）。
--- 使用输入数据，[5,5,2,3]你可以做[5,5]，[5,2,3]。
比赛时间：14天。
所需的响应标签格式（用于自动解析器到表）：
<h2>Язык, КоличествоСимволов</h2>
获胜者的定义：由等级决定：
- 由最少字符数组成的实现。
- 获得最多赞成票的实施（总体评分减去反对票）。
- 第一次修订时间较早的实现。
还需要提供一个带有您的工作代码的在线编译器的链接。
欢迎测试。
强烈建议同时提供代码的竞争版本（缩小和/或带有巫术）和相同代码的可视化描述。每个人不仅有兴趣看到语言的魔力，而且有兴趣为自己学习一些东西。
如果以不同的语言实现，则允许一位参与者提供多个答案。但每种语言不超过一个
如对条款的细节和/或分歧和/或解释有任何疑问，请在本文评论或代码高尔夫聊天室中讨论。
结果：
大多数赞成票的标准 3 个位置 + 1 个（总体评分减去反对票数）。
第一名：@PavelMayorov-， 42Haskell个字符。
第二名：@ArtemKonovalov-，69Scala个字符。
第三名：@Mike-，78Perl个字符。
观众选择：@D-side ( Ruby, 84) - 19 分。
恭喜所有参赛者，你们打得很好。
激情在最后高涨，出人意料地公布了一项以 1 个符号超越领导者的决定。
但是命运把一切都带回来了。
我想指出来自用户@AlexanderGavrikov的本次比赛的不寻常解决方案- 1437个字符！
这是一种记录，值得注意。
排行榜：
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.cssload-container,.cssload-cube{width:97px;height:97px;transform-style:preserve-3d}.cssload-container,.cssload-cube,.cssload-half1,.cssload-half2{transform-style:preserve-3d}.cssload-container{position:relative;margin:23px 84px;perspective:292px}.cssload-cube{animation:cube 11.5s forwards infinite;transform-origin:center 49px}.cssload-half1,.cssload-s1{top:0;transform-origin:50% 100%}.cssload-half1{height:39px;position:absolute;animation:half-fold 11.5s forwards infinite}.cssload-side{width:19px;height:19px;background:#ddd;position:absolute}.cssload-s1{left:39px;animation:s1ani 11.5s forwards infinite}.cssload-s2,.cssload-s3,.cssload-s4{left:39px;transform-origin:50% 0}.cssload-s2{top:19px;animation:s2ani 11.5s forwards infinite}.cssload-s3{top:39px;animation:s3ani 11.5s forwards infinite}.cssload-s4{top:58px;animation:s4ani 11.5s forwards infinite}.cssload-s5{left:19px;top:19px;transform-origin:100% 50%;animation:s5ani 11.5s forwards infinite}.cssload-s6{left:58px;top:39px;transform-origin:0 50%;animation:s6ani 11.5s forwards infinite}@keyframes cube{0%,30%{transform:rotateX(0)}40%{transform:rotateX(45deg) rotateY(0) rotate(45deg)}60%{transform:rotateX(60deg) rotateY(0) rotate(45deg)}65%,70%{transform:rotateX(60deg) rotate(45deg) rotate(180deg)}75%,80%{transform:rotateX(60deg) rotate(45deg) rotate(1turn)}90%{transform:rotateX(0) rotate(0) rotate(0)}}@keyframes s1ani{0%{opacity:1;transform:translateY(0);background:#ddd}40%{transform:rotateX(0);background:#ddd}50%{transform:rotateX(-90deg);background:#ddd}90%{transform:rotateX(-90deg)}}@keyframes s2ani{0%{opacity:0;transform:rotateX(-179deg)}10%{opacity:1;transform:rotateX(0)}40%{background:#ddd}45%,80%{background:#b4b4b4}65%{opacity:1;background:#b4b4b4}90%{opacity:1}to{opacity:0}}@keyframes s3ani{0%,10%{opacity:0;transform:rotateX(-179deg)}20%,90%{opacity:1;transform:rotateX(0)}40%{background:#ddd}45%{background:#969696}to{opacity:0}}@keyframes s4ani{0%,20%{opacity:0;transform:rotateX(-179deg)}10%,to{opacity:0}30%{opacity:1;transform:rotateX(0)}40%{transform:rotateX(0);background:#ddd}50%{transform:rotateX(90deg);background:#b4b4b4}80%{background:#b4b4b4}90%{opacity:1;transform:rotateX(90deg)}}@keyframes s5ani{0%,10%{opacity:0;transform:rotateY(-179deg)}20%{opacity:1;background:#ddd;transform:rotateY(0)}40%{transform:rotateY(0)}50%{transform:rotateY(90deg)}55%{background:#ddd}60%{background:#c8c8c8}90%{transform:rotateY(90deg);opacity:1}to{opacity:0}}@keyframes s6ani{0%,20%{opacity:0;transform:rotateY(179deg)}30%{opacity:1;transform:rotateY(0)}40%{transform:rotateY(0)}50%{transform:rotateY(-90deg);background:#ddd}60%,80%{background:#c8c8c8}90%{opacity:1;transform:rotateY(-90deg)}to{opacity:0}}@keyframes half-fold{0%,50%{transform:rotateX(0)}60%,90%{transform:rotateX(-90deg)}}
/* TODO: Fix it */
body {
font-size: 1rem;
line-height: 1.5rem;
font-family: 'Open Sans', sans-serif;
background: #fff;
padding: 0 2rem;
}
h1 {
font-weight: 600;
margin-bottom: 3rem;
text-align: center;
color: #212121;
}
#leadership {
width: 100%;
margin: 1rem auto;
border-collapse: collapse;
box-shadow: 0 2px 7px rgba(0,0,0,0.2);
background: #fafafa;
}
#leadership td {
padding: 1rem .5rem !important;
text-align: left;
font-weight: 500;
transition: all .3s ease-in-out;
}
#leadership tr:hover td{
background: #03a9f4;
color: #fefefe;
}
#leadership tr:hover td a {
color: #fff;
}
#leadership th {
padding: 1.5rem .5rem !important;
color: #727272;
text-align: left !important;
font-weight: 500;
border-bottom: 1px solid #dcdcdc;
}
#leadership a {
text-decoration: none;
color: #212121;
}
#leadership a:hover {
color: #03a9f4;
}
#leadership td:nth-of-type(1){
text-align: center;
color: #727272;
font-size: .75rem;
}
#leadership td:nth-of-type(2){
}
#leadership td:nth-of-type(2) img {
width: 34px;
border-radius: 50%;
}
/* #leadership th:nth-of-type(1),
#leadership th:nth-of-type(2){
border-bottom: none;
} */
#leadership th:nth-of-type(5),
#leadership th:nth-of-type(6),
#leadership th:nth-of-type(7),
#leadership td:nth-of-type(5),
#leadership td:nth-of-type(6),
#leadership td:nth-of-type(7) {
text-align: center !important;
}<script src="https://mayorovp.github.io/codegolf/97314479fcd24a2386e1.js"></script>
<div class=cssload-container><div class=cssload-cube><div class=cssload-half1><div class="cssload-side cssload-s1"></div><div class="cssload-side cssload-s2"></div><div class="cssload-side cssload-s5"></div></div><div class=cssload-half2><div class="cssload-side cssload-s3"></div><div class="cssload-side cssload-s4"></div><div class="cssload-side cssload-s6"></div></div></div></div>大家好运！