javascript - 给定一个索引位置，我如何拆分出该位置所在的句子？

Question

我正在使用 JavaScript，我的文本是:

Dana's places, we're having people coming to us people wanna buy condos. They want to move quickly and we're just losing out on a lot of great places. Really what would you say this?

如果我的索引位置是 6，我只想得到第一句话:Dana's places, we're having people come to us people wanna buy condos.

如果我的索引位置是 80，我只想得到第二句话:他们想快速行动，而我们只是失去了很多好地方。

如何根据位置解析句子？

Answer 1

如果我没理解错的话，你应该可以

分期。 获取字符串的长度。 根据句子长度确定索引的位置。

考虑到您需要拆分 "?, !"同样，您只需要遍历句子并将它们进一步扁平化。阿卡，再次 split 。

老实说，使用正则表达式和组可能更干净。

这是正则表达式版本

    const paragraph = "Dana's places, we're having people coming to us people wanna buy condos. They want to move quickly and we're just losing out on a lot of great places. Really what would you say this?"


    /**
     * Finds sentence by character index
     * @param index 
     * @param paragraph 
     */
    function findSentenceByCharacterIndex(index, paragraph) {

        const regex = /([^.!?]*[.!?])/gm

        const matches = paragraph.match(regex);

        let cursor = 0;

        let sentenceFound;

        for (const sentence of matches) {

            sentenceFound = sentence;

            cursor += sentence.length;

            if( cursor > index )
            {
                break;
            }
        }

        return sentenceFound;
    }


    const found = findSentenceByCharacterIndex(5, paragraph);