xpath concat

XPath中的concat函数用于将多个字符串连接在一起。它接受多个参数，并返回这些参数连接后的结果。例如，当我们使用xpath('concat(//li[@data="one"]/text(),//li[@data="three"]/text())')时，将返回"13"。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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