如何将波斯语(波斯语)段落转换为 Javascript 中的单词列表

how to turn a Persian (Farsi) paragraph into its list of words in Javascript

我正在尝试从显示单词及其频率的段落中制作一个对象。

var pattern = /\w+/g,
//the farsi paragraph
    string = "من امروز در مورد مهر خروج مشمولین اطلاعات جدیدی از سفارت ایران در مالزی گرفتم",
    matchedWords = string.match( pattern );

/* The Array.prototype.reduce method assists us in producing a single value from an
   array. In this case, we're going to use it to output an object with results. */
var counts = matchedWords.reduce(function ( stats, word ) {

    /* `stats` is the object that we'll be building up over time.
       `word` is each individual entry in the `matchedWords` array */
    if ( stats.hasOwnProperty( word ) ) {
        /* `stats` already has an entry for the current `word`.
           As a result, let's increment the count for that `word`. */
        stats[ word ] = stats[ word ] + 1;
    } else {
        /* `stats` does not yet have an entry for the current `word`.
           As a result, let's add a new entry, and set count to 1. */
        stats[ word ] = 1;
    }

    /* Because we are building up `stats` over numerous iterations,
       we need to return it for the next pass to modify it. */
    return stats;

}, {})

var dict = []; // create an empty array
// this for loop makes a dictionary for you
for (i in counts){
dict.push({'text':i, "size": counts[i]});


};

/* lets print and see if you can solve your problem */

console.log( dict);

代码最初是为英文段落设计的。但是我需要将它用于波斯语。 我知道它应该是别的东西而不是 "/\w+/g" in:

var pattern = /\w+/g,

但我不知道是什么。

在您的正则表达式中,使用 "any character but whitespace" 的变量 \S。 编辑:whitespace 被认为是换行符、制表符和 space)

var pattern = /\S+/g,
//the farsi paragraph
    string = "من امروز در مورد مهر خروج مشمولین اطلاعات جدیدی از سفارت ایران در مالزی گرفتم",
    matchedWords = string.match( pattern );

/* The Array.prototype.reduce method assists us in producing a single value from an
   array. In this case, we're going to use it to output an object with results. */
var counts = matchedWords.reduce(function ( stats, word ) {

    /* `stats` is the object that we'll be building up over time.
       `word` is each individual entry in the `matchedWords` array */
    if ( stats.hasOwnProperty( word ) ) {
        /* `stats` already has an entry for the current `word`.
           As a result, let's increment the count for that `word`. */
        stats[ word ] = stats[ word ] + 1;
    } else {
        /* `stats` does not yet have an entry for the current `word`.
           As a result, let's add a new entry, and set count to 1. */
        stats[ word ] = 1;
    }

    /* Because we are building up `stats` over numerous iterations,
       we need to return it for the next pass to modify it. */
    return stats;

}, {})

var dict = []; // create an empty array
// this for loop makes a dictionary for you
for (i in counts){
dict.push({'text':i, "size": counts[i]});


};

/* lets print and see if you can solve your problem */

console.log( dict);

要匹配任何字母,您需要使用 XRegExp 包和 \pL Unicode 属性 class:

var pattern = new XRegExp("[_\pL\pN]+", "g");
var s = "من امروز در مورد مهر خروج مشمولین اطلاعات جدیدی از سفارت ایران در مالزی گرفتم";
var matchedWords = s.match( pattern );
var counts = matchedWords.reduce(function ( stats, word ) {
 if ( stats.hasOwnProperty( word ) ) {
    stats[ word ] = stats[ word ] + 1;
 } else {
    stats[ word ] = 1;
 }
 return stats;
}, {})

var dict = [];
for (i in counts){
 dict.push({'text':i, "size": counts[i]});
 }
console.log(dict);
<script src="https://cdnjs.cloudflare.com/ajax/libs/xregexp/3.2.0/xregexp-all.min.js"></script>

[_\pL\pN]+ 模式匹配一​​个或多个下划线(_,我包含它是因为您原始正则表达式中的 \w 也匹配 _),Unicode 字母(\pL) 和数字 (\pN).

要只计算由 个字母 组成的单词,只需使用

var pattern = new XRegExp("\pL+", "g");

您可以对单词和量词使用等效的 JS \w+
这将匹配大约 119,000 个 Unicode 9 单词字符。
这包括所有非字母、非数字、其他单词字符
比如下划线,大约有 1,100 个。

注意 - 它运行得非常快,但是我会让这个正则表达式成为全局的并且
编译一次供以后使用。

此外,这是从 ICU 数据库生成的,它提供了完整的
U+000000 到 U+10FFFF 之间的单词 \w 的示例,此正则表达式
使用 UCD Interface, in the RegexFormat 应用生成。

这是XRegExp做不到的。

演示:

https://regex101.com/r/sjLmMC/1

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为什么不在您的案例中结合使用 split 和 reduce?示例:

const p = 'من امروز در مورد مهر خروج مشمولین اطلاعات جدیدی از سفارت ایران در مالزی گرفتم';

const counted = p.split( ' ' ).reduce( ( collected, item ) => {
  collected[ item ] = ( collected[ item ] || 0 ) + 1;
  return collected;
}, { /* initial empty object */ } );
const dict = Object.keys( counted ).map( key => {
  return {
    text: key,
    size: counted[ key ],
  };
} );

console.log( 'در:', counted[ 'در' ] );
console.log( dict );

它更简单,性能更好。您甚至可以省略 const dict... 部分。