我需要从同一个套接字或从中读取多个线程 $ * IN;然而，似乎有错误，因为每个人都试图从相同的来源读取（我认为）。解决此问题的最佳方法是什么？谢谢!!
my $x = start { prompt("I am X: Enter x: "); }
my $y = start { prompt("I am Y: Enter y: "); }
await $x, $y;
say $x;
say $y;
以下是错误：
I am X: Enter x: I am Y: Enter y: Tried to get the result of a broken Promise
in block <unit> at zz.pl line 4
Original exception:
Tried to read() from an IO handle outside its originating thread
in block at zz.pl line 1
谢谢！
答案 0 :(得分：4)
在Rakudo的最新开发快照中，您的代码实际上可以正常工作而不会在我的系统上抛出任何异常...
但是，它仍会立即询问两个值（I am X: Enter x: I am Y: Enter y:）。
要使第二个prompt等到第一个#--- Main code ---
my $x = start { synchronized-prompt "I am X: Enter x: "; }
my $y = start { synchronized-prompt "I am Y: Enter y: "; }
await $x, $y;
say $x.result;
say $y.result;
#--- Helper routines ---
BEGIN my $prompt-lock = Lock.new;
sub synchronized-prompt ($message) {
$prompt-lock.protect: { prompt $message; }
}
完成，您可以使用Lock：
Lock.new棘手的部分是，在线程开始并发使用之前，需要初始化锁。这就是我在程序主线中调用synchronized-prompt子程序的add_filter( 'woocommerce_continue_shopping_redirect', 'my_changed_woocommerce_continue_shopping_redirect', 10, 1 );
function my_changed_woocommerce_continue_shopping_redirect( $return_to ){
$return_to = wc_get_page_permalink( 'checkout' );
return $return_to;
}
add_filter( 'wc_add_to_cart_message_html', 'my_changed_wc_add_to_cart_message_html', 10, 2 );
function my_changed_wc_add_to_cart_message_html($message, $products){
if (strpos($message, 'Continue shopping') !== false) {
$message = str_replace("Continue shopping", "Go the checkout", $message);
}
return $message;
}
之外的.grid {
width: 100%;
max-width: 900px;
margin: 0 auto;
background: #fff;
}
.grid::after {
content: "";
display: block;
clear: both;
}
.grid-item {
width: 21.833%;
padding-bottom: 21.833%;
overflow: hidden;
float: left;
background: #BBB;
transform: rotate(45deg);
margin: 5.5%;
margin-top: -11%;
}
.grid-item:nth-child(1),
.grid-item:nth-child(2),
.grid-item:nth-child(3) {
margin-top: 5%;
}
.grid-item:nth-child(5n+4) {
margin-left: 21.9%;
}
.grid-item:nth-child(5n+6) {
clear: left;
}
.grid-item:nth-child(5n+6):last-of-type {
margin-left: 38.25%;
}
.grid-item:hover {
background: #000;
}
.grid-inner {
box-sizing: border-box;
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
transform: rotate(-45deg);
text-align: center;
padding-top: 40%;
font-size: 1em;
}
.grid-inner:hover a span {
display: none;
}
.grid-inner:hover:after {
box-sizing: border-box;
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
transform: rotate(-45deg);
text-align: center;
padding-top: 40%;
font-size: 1em;
background-color: black;
}
.grid-inner-hover {
opacity: 0;
}
.grid-item:hover .grid-inner-hover {
opacity: 1;
color: #fff;
} 的原因。我没有在程序顶部执行此操作，而是使用BEGIN phaser，以便将其放在子例程旁边。