搜索文本，然后提取行

Question

我将JSONL文件作为文本字符串，它是一个非常大的文件，不能转换为标准的JSON：

{"id":"gid:\/\/shopify\/ProductVariant\/32620848382088","__parentId":"gid:\/\/shopify\/Product\/4632300847240"}
{"id":"gid:\/\/shopify\/Product\/4632300912776"}
{"namespace":"daily_deals","key":"status","value":"inactive","__parentId":"gid:\/\/shopify\/Product\/4632300912776"}
{"namespace":"daily_deals","key":"endtime","value":"1604966400000","__parentId":"gid:\/\/shopify\/Product\/4632300912776"}
{"id":"gid:\/\/shopify\/ProductVariant\/32620848447624","__parentId":"gid:\/\/shopify\/Product\/4632300912776"}
{"id":"gid:\/\/shopify\/Product\/4632301011080"}
{"namespace":"daily_deals","key":"status","value":"inactive","__parentId":"gid:\/\/shopify\/Product\/4632301011080"}
{"namespace":"daily_deals","key":"endtime","value":"1604966400000","__parentId":"gid:\/\/shopify\/Product\/4632301011080"}
{"id":"gid:\/\/shopify\/ProductVariant\/32620848808072","__parentId":"gid:\/\/shopify\/Product\/4632301011080"}
{"id":"gid:\/\/shopify\/ProductVariant\/39402297720968","__parentId":"gid:\/\/shopify\/Product\/4632301011080"}
{"id":"gid:\/\/shopify\/Product\/4673135444104"}

我想在前端解决问题，所以我需要使用javascript。如何使用regex只选择包含文本的行："gid://shopify/Product/4632301011080"和"namespace":"daily_deals"？所以我需要整行从{到}如果包含文本

是使用regex或其他技术的最佳解决方案吗？请建议一下？文本JSONL文件平均为10 it，因此我认为它不会对浏览器内存产生很大影响。

更新:由于性能原因，我想搜索的所有行都以{"namespace":和其他我想忽略的行开始

Answer 1

您可以使用这个regex：

/^{"namespace":"daily_deals".*?"gid:\/\/shopify\/Product\/4632301011080".*/gm

​

let content = `{"id":"gid:\/\/shopify\/ProductVariant\/32620848382088","__parentId":"gid:\/\/shopify\/Product\/4632300847240"}
{"id":"gid:\/\/shopify\/Product\/4632300912776"}
{"namespace":"daily_deals","key":"status","value":"inactive","__parentId":"gid:\/\/shopify\/Product\/4632300912776"}
{"namespace":"daily_deals","key":"endtime","value":"1604966400000","__parentId":"gid:\/\/shopify\/Product\/4632300912776"}
{"id":"gid:\/\/shopify\/ProductVariant\/32620848447624","__parentId":"gid:\/\/shopify\/Product\/4632300912776"}
{"id":"gid:\/\/shopify\/Product\/4632301011080"}
{"namespace":"daily_deals","key":"status","value":"inactive","__parentId":"gid:\/\/shopify\/Product\/4632301011080"}
{"namespace":"daily_deals","key":"endtime","value":"1604966400000","__parentId":"gid:\/\/shopify\/Product\/4632301011080"}
{"id":"gid:\/\/shopify\/ProductVariant\/32620848808072","__parentId":"gid:\/\/shopify\/Product\/4632301011080"}
{"id":"gid:\/\/shopify\/ProductVariant\/39402297720968","__parentId":"gid:\/\/shopify\/Product\/4632301011080"}
{"id":"gid:\/\/shopify\/Product\/4673135444104"}`;

let result = content.match(/^{"namespace":"daily_deals".*?"gid:\/\/shopify\/Product\/4632301011080".*/gm);

console.log(result);

​

Answer 2

试一试:假设"namespace":"daily_deals"部件总是在"gid://shopify/Product/4632301011080"之前出现，这个正则表达式将起作用。

^{"namespace":"daily_deals".*"gid:\/\/shopify\/Product\/4632301011080".*

见现场演示。

Answer 3

/gid://shopify/Product/\d{1,}/