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JavaScript で大文字と小文字を区別する文字列置換を実行するにはどうすればよいですか? PHP に似たものを探していますstr_replace。

var text = "this IS some sample text that is going to be replaced";
var new_text = replace_in_javascript("IS", "is not", text);
document.write(new_text);

与えるべき

this is not some sample text that is going to be replaced

すべてのオカレンスを置き換えたいと思います。

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2 に答える 2

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正規表現を使用できます。

var str = 'is not';
str = str.replace(/IS/g, 'something'); // won't replace "is"

gグローバル用です。

大文字と小文字を区別しない結果が必要な場合は、iフラグ/is/gi.

于 2013-01-24T03:31:23.183 に答える
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PHP 関数とまったく同じように動作します。

function str_ireplace(search, replace, subject) {
  //  discuss at: http://phpjs.org/functions/str_ireplace/
  // original by: Martijn Wieringa
  //    input by: penutbutterjelly
  //    input by: Brett Zamir (http://brett-zamir.me)
  // improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
  // improved by: Jack
  // bugfixed by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
  // bugfixed by: Onno Marsman
  // bugfixed by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
  // bugfixed by: Philipp Lenssen
  //   example 1: str_ireplace('l', 'l', 'HeLLo');
  //   returns 1: 'Hello'
  //   example 2: str_ireplace('$', 'foo', '$bar');
  //   returns 2: 'foobar'

  var i, k = '';
  var searchl = 0;
  var reg;

  var escapeRegex = function(s) {
    return s.replace(/([\\\^\$*+\[\]?{}.=!:(|)])/g, '\\$1');
  };

  search += '';
  searchl = search.length;
  if (Object.prototype.toString.call(replace) !== '[object Array]') {
    replace = [replace];
    if (Object.prototype.toString.call(search) === '[object Array]') {
      // If search is an array and replace is a string,
      // then this replacement string is used for every value of search
      while (searchl > replace.length) {
        replace[replace.length] = replace[0];
      }
    }
  }

  if (Object.prototype.toString.call(search) !== '[object Array]') {
    search = [search];
  }
  while (search.length > replace.length) {
    // If replace has fewer values than search,
    // then an empty string is used for the rest of replacement values
    replace[replace.length] = '';
  }

  if (Object.prototype.toString.call(subject) === '[object Array]') {
    // If subject is an array, then the search and replace is performed
    // with every entry of subject , and the return value is an array as well.
    for (k in subject) {
      if (subject.hasOwnProperty(k)) {
        subject[k] = str_ireplace(search, replace, subject[k]);
      }
    }
    return subject;
  }

  searchl = search.length;
  for (i = 0; i < searchl; i++) {
    reg = new RegExp(escapeRegex(search[i]), 'gi');
    subject = subject.replace(reg, replace[i]);
  }

  return subject;
}

オリジナル: http://phpjs.org/functions/str_ireplace/

于 2016-01-20T20:36:18.917 に答える