Question

我有一个字符串数组，如下所示

["<table class=\"size-table _size-table\">\n<tr class=\"product-size _product-size disabled _disabled\" data-sku=\"3255138\" role=\"option\" aria-disabled=\"true\" aria-label=\"2\">\n<td class=\"size-name _size-name\">2",
 "\n<td class=\"subscribe\">",
 "\n</tr>\n<tr class=\"product-size _product-size disabled _disabled\" data-sku=\"3255136\" role=\"option\" aria-disabled=\"true\" aria-label=\"3\">\n<td class=\"size-name _size-name\">3",
 "\n<td class=\"subscribe\">",
 "\n</tr>\n<tr class=\"product-size _product-size disabled _disabled\" data-sku=\"3255137\" role=\"option\" aria-disabled=\"true\" aria-label=\"4\">\n<td class=\"size-name _size-name\">4",
 "\n<td class=\"subscribe\">",
 "\n</tr>\n<tr class=\"product-size _product-size disabled _disabled\" data-sku=\"3255135\" role=\"option\" aria-disabled=\"true\" aria-label=\"5\">\n<td class=\"size-name _size-name\">5",
 "\n<td class=\"subscribe\">",
 "\n</tr>\n<tr class=\"product-size _product-size disabled _disabled\" data-sku=\"3255134\" role=\"option\" aria-disabled=\"true\" aria-label=\"6\">\n<td class=\"size-name _size-name\">6",
 "\n<td class=\"subscribe\">",
 "\n</tr>\n<tr class=\"product-size _product-size disabled _disabled\" data-sku=\"3255133\" role=\"option\" aria-disabled=\"true\" aria-label=\"7\">\n<td class=\"size-name _size-name\">7",
 "\n<td class=\"subscribe\">",
 "\n</tr>\n<tr class=\"product-size _product-size disabled _disabled\" data-sku=\"3255132\" role=\"option\" aria-disabled=\"true\" aria-label=\"8\">\n<td class=\"size-name _size-name\">8",
 "\n<td class=\"subscribe\">",
 "\n</tr>\n<tr class=\"product-size _product-size disabled _disabled\" data-sku=\"3255131\" role=\"option\" aria-disabled=\"true\" aria-label=\"9\">\n<td class=\"size-name _size-name\">9",
 "\n<td class=\"subscribe\">",
 "\n</tr>\n</table>\n"]

我想要aria-label中的内容。这将是上面显示的数字，或者在某些情况下，它可能是一些值，如S，M，L，XL。

所以我正在尝试每个数组元素，并通过ruby中的某种正则表达式选择aria-label下的内容。但我无法正确理解它。请帮忙

Answer 1

虽然有人认为不应该用正则表达式解析HTML，但在这种特殊情况下，它可能被认为是好的恕我直言，因为输入更像是字符串，而不像HTML。

inp.map { |e| e[/(?<=aria-label=").+?(?=")/] }

#⇒ ["2", nil, "3", nil, "4", nil, "5", nil, "6", 
#     nil, "7", nil, "8", nil, "9", nil, nil]

仅检索有意义的值：

inp.map { |e| e[/(?<=aria-label=").+?(?=")/] }.compact
#⇒ ["2", "3", "4", "5", "6", "7", "8", "9"]

正则表达式匹配ruby

1 个答案: