正則運算式搜索文本然后提取行

我有 JSONL 檔案作為文本 - 字串，它是一個非常大的檔案，對于轉換為標準 JSON 沒有用：

{"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"}

我想在前端解決問題，所以我需要使用 javascript 。如何使用正則運算式僅選擇包含文本的行："gid://shopify/Product/4632301011080"和"namespace":"daily_deals"？所以如果包含文本，我需要從 { 到 } 的整行

使用正則運算式或其他技術的最佳解決方案是什么？請建議？文本 JSONL 檔案平均為 10mb，所以我認為它不會對瀏覽器記憶體產生很大影響。

更新： 我想搜索的所有行都以{"namespace":和其他一次我想因為性能而忽略

uj5u.com熱心網友回復：

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

uj5u.com熱心網友回復：

你可以使用這個正則運算式：

/^{"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);

uj5u.com熱心網友回復：

試試這個：假設"namespace":"daily_deals"部分總是在"gid://shopify/Product/4632301011080"這個正則運算式起作用之前出現。

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

見現場演示。

標籤：javascript正则表达式jsonlines

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