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<!DOCTYPE html>
<html lang="en-US" dir="ltr">
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<meta name="viewport" content="width=device-width,initial-scale=1">
<title>流 | 编程导引</title>
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class="menu" aria-expanded="false" aria-controls="VPSidebarNav" data-v-f5a2ca58><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" viewbox="0 0 24 24" class="menu-icon" data-v-f5a2ca58><path d="M17,11H3c-0.6,0-1-0.4-1-1s0.4-1,1-1h14c0.6,0,1,0.4,1,1S17.6,11,17,11z"></path><path d="M21,7H3C2.4,7,2,6.6,2,6s0.4-1,1-1h18c0.6,0,1,0.4,1,1S21.6,7,21,7z"></path><path d="M21,15H3c-0.6,0-1-0.4-1-1s0.4-1,1-1h18c0.6,0,1,0.4,1,1S21.6,15,21,15z"></path><path d="M17,19H3c-0.6,0-1-0.4-1-1s0.4-1,1-1h14c0.6,0,1,0.4,1,1S17.6,19,17,19z"></path></svg><span class="menu-text" data-v-f5a2ca58>Menu</span></button><div class="VPLocalNavOutlineDropdown" style="--vp-vh:0px;" data-v-f5a2ca58 data-v-079b16a8><button data-v-079b16a8>Return to top</button><!----></div></div><aside class="VPSidebar" data-v-b2cf3e0b data-v-af16598e><div class="curtain" data-v-af16598e></div><nav class="nav" id="VPSidebarNav" aria-labelledby="sidebar-aria-label" tabindex="-1" data-v-af16598e><span class="visually-hidden" id="sidebar-aria-label" data-v-af16598e> Sidebar Navigation </span><!--[--><!--]--><!--[--><div class="group" data-v-af16598e><section class="VPSidebarItem level-0" data-v-af16598e data-v-c4656e6d><!----><div class="items" data-v-c4656e6d><!--[--><div class="VPSidebarItem level-1 is-link" data-v-c4656e6d data-v-c4656e6d><div class="item" data-v-c4656e6d><div class="indicator" data-v-c4656e6d></div><a class="VPLink link link" href="/intro.html" data-v-c4656e6d data-v-8f4dc553><!--[--><p class="text" data-v-c4656e6d>引言</p><!--]--><!----></a><!----></div><!----></div><div class="VPSidebarItem level-1 is-link" data-v-c4656e6d data-v-c4656e6d><div class="item" data-v-c4656e6d><div class="indicator" data-v-c4656e6d></div><a class="VPLink link link" href="/ch01_environment.html" data-v-c4656e6d data-v-8f4dc553><!--[--><p class="text" data-v-c4656e6d>环境</p><!--]--><!----></a><!----></div><!----></div><div class="VPSidebarItem level-1 is-link" data-v-c4656e6d data-v-c4656e6d><div class="item" data-v-c4656e6d><div class="indicator" data-v-c4656e6d></div><a class="VPLink link link" href="/ch02_computation.html" data-v-c4656e6d data-v-8f4dc553><!--[--><p class="text" data-v-c4656e6d>计算</p><!--]--><!----></a><!----></div><!----></div><div class="VPSidebarItem level-1 is-link" data-v-c4656e6d data-v-c4656e6d><div class="item" data-v-c4656e6d><div class="indicator" data-v-c4656e6d></div><a class="VPLink link link" href="/ch03_procedure.html" data-v-c4656e6d data-v-8f4dc553><!--[--><p class="text" data-v-c4656e6d>过程</p><!--]--><!----></a><!----></div><!----></div><div class="VPSidebarItem level-1 is-link" data-v-c4656e6d data-v-c4656e6d><div class="item" data-v-c4656e6d><div class="indicator" data-v-c4656e6d></div><a class="VPLink link link" href="/ch04_encoding.html" data-v-c4656e6d data-v-8f4dc553><!--[--><p class="text" data-v-c4656e6d>编码</p><!--]--><!----></a><!----></div><!----></div><div class="VPSidebarItem level-1 is-link" data-v-c4656e6d data-v-c4656e6d><div class="item" data-v-c4656e6d><div class="indicator" data-v-c4656e6d></div><a class="VPLink link link" href="/ch05_sequence.html" data-v-c4656e6d data-v-8f4dc553><!--[--><p class="text" data-v-c4656e6d>序列</p><!--]--><!----></a><!----></div><!----></div><div class="VPSidebarItem level-1 is-link" data-v-c4656e6d data-v-c4656e6d><div class="item" data-v-c4656e6d><div class="indicator" data-v-c4656e6d></div><a class="VPLink link link" href="/ch06_data.html" data-v-c4656e6d data-v-8f4dc553><!--[--><p class="text" data-v-c4656e6d>数据</p><!--]--><!----></a><!----></div><!----></div><div class="VPSidebarItem level-1 is-link" data-v-c4656e6d data-v-c4656e6d><div class="item" data-v-c4656e6d><div class="indicator" data-v-c4656e6d></div><a class="VPLink link link" href="/ch07_state.html" data-v-c4656e6d data-v-8f4dc553><!--[--><p class="text" data-v-c4656e6d>状态</p><!--]--><!----></a><!----></div><!----></div><div class="VPSidebarItem level-1 is-link" data-v-c4656e6d data-v-c4656e6d><div class="item" data-v-c4656e6d><div class="indicator" data-v-c4656e6d></div><a class="VPLink link link" href="/ch08_reference.html" data-v-c4656e6d data-v-8f4dc553><!--[--><p class="text" data-v-c4656e6d>引用</p><!--]--><!----></a><!----></div><!----></div><div class="VPSidebarItem level-1 is-link" data-v-c4656e6d data-v-c4656e6d><div class="item" data-v-c4656e6d><div class="indicator" data-v-c4656e6d></div><a class="VPLink link link" href="/ch09_closure.html" data-v-c4656e6d data-v-8f4dc553><!--[--><p class="text" data-v-c4656e6d>闭包</p><!--]--><!----></a><!----></div><!----></div><div class="VPSidebarItem level-1 is-link" data-v-c4656e6d data-v-c4656e6d><div class="item" data-v-c4656e6d><div class="indicator" data-v-c4656e6d></div><a class="VPLink link link" href="/ch10_object.html" data-v-c4656e6d data-v-8f4dc553><!--[--><p class="text" data-v-c4656e6d>对象</p><!--]--><!----></a><!----></div><!----></div><div class="VPSidebarItem level-1 is-link" data-v-c4656e6d data-v-c4656e6d><div class="item" data-v-c4656e6d><div class="indicator" data-v-c4656e6d></div><a class="VPLink link link" href="/ch11_concurrency.html" data-v-c4656e6d data-v-8f4dc553><!--[--><p class="text" data-v-c4656e6d>并发</p><!--]--><!----></a><!----></div><!----></div><!--]--></div></section></div><!--]--><!--[--><!--]--></nav></aside><div class="VPContent has-sidebar" id="VPContent" data-v-b2cf3e0b data-v-a494bd1d><div class="VPDoc has-sidebar has-aside" data-v-a494bd1d data-v-c4b0d3cf><!--[--><!--]--><div class="container" data-v-c4b0d3cf><div class="aside" data-v-c4b0d3cf><div class="aside-curtain" data-v-c4b0d3cf></div><div class="aside-container" data-v-c4b0d3cf><div class="aside-content" data-v-c4b0d3cf><div class="VPDocAside" data-v-c4b0d3cf data-v-3f215769><!--[--><!--]--><!--[--><!--]--><div class="VPDocAsideOutline" data-v-3f215769 data-v-ff0f39c8><div class="content" data-v-ff0f39c8><div class="outline-marker" data-v-ff0f39c8></div><div class="outline-title" 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