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JavaScript Regex: Replace |b| with <b>


JavaScript Regex: Replace |b| with <b>

By : Arup Aich
Date : November 28 2020, 08:01 AM
wish helps you You're declaring a character class with [|b|] which means match either b or |. You need to escape the pipes \|b\|since a pipe means "or" in regex.
code :


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JavaScript Regex to Java Regex - Replace and Lambdas

JavaScript Regex to Java Regex - Replace and Lambdas


By : Jerry Marmol
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further What is the best way to approach translating this code into Java? (the section called Convert Alpha-numeric Phone Number to All Numeric) http://lawrence.ecorp.net/inet/samples/regexp-format.php , Wow, the original code is a bit over-verbose. I'd do:
code :
return phoneStr.replace(/[a-zA-Z]/g, function(m) {
    var ix= m[0].toLowerCase().charCodeAt(0)-0x61; // ASCII 'a'
    return '22233344455566677778889999'.charAt(ix);
});
StringBuffer b= new StringBuffer();
Matcher m= Pattern.compile("[A-Za-z]").matcher(phoneStr);
while (m.find()) {
    int ix= (int) (m.group(0).toLowerCase().charAt(0)-'a');
    m.appendReplacement(b, "22233344455566677778889999".substring(ix, ix+1));
}
m.appendTail(b);
return b.toString();
char[] c= phoneStr.toLowerCase().toCharArray();
for (int i= 0; i<c.length; i++)
    if (c[i]>='a' && c[i]<='z')
        c[i]= "22233344455566677778889999".charAt((int) (c[i]-'a'));
return new String(c);
javascript regex replace, how to provide regex condition (and flags) as variable instead of inline?

javascript regex replace, how to provide regex condition (and flags) as variable instead of inline?


By : Chirag
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , Using the JS replace function with regex, and will have dozens of replace statements. , I would use a lookup object to map the originals to URLs:
code :
// Original string
var o = "MySql is a DBMS, whereas javascript is a client side scripting language";

//Patterns
var patterns = {
    "javascript": "http://js.com/",
    "mysql": "http://www.mysql.com/"
};

//Constructing regex
RegExp.escape= function(s) {
    return s.replace(/[-\/\\^$*+?.()|[\]{}]/g, '\\$&')
};
var keys = [];
for (i in patterns) {
    if (patterns.hasOwnProperty(i)) {
        keys.push(RegExp.escape(i));
    }
}
var pattern = new RegExp("\\b(" + keys.join("|") + ")\\b", "gi");

//Replace
var n = o.replace(pattern, function(m, g1) {
    return "<a href='" + patterns[g1.toLowerCase()] + "'>" + g1 + "< /a>";
});
console.log(n);
// Original string
var o = '<p>Test 1 (JavaScript - <strong>1st keyword instance to be replaced</strong>): <br><a href="http://js1.net">Link to JavaScript site (existing URL)</a> is a scripting language commonly implemented as part of a web browser in order to create enhanced user interfaces and dynamic websites. JavaScript is very flexible.</p><p>more text here... and another mention of JavaScript. also javascript and JAVAScrIPT <br><br></p><p>Test 2 (MySQL - <strong>1st keyword instance to be replaced</strong>): <br><a href="http://www.mysql.com">MySQL</a>  (existing URL) is the most popular open-source database system.</p> <p><a href="http://www.themysqllink.com">link to a MySQL site</a> (existing URL).</p><p> More stuff about Mysql, also mysql and mySQL</p>';

//Patterns
var patterns = {
    "javascript": "http://js.com/",
    "mysql": "http://www.mysql.com/",
    "mention": "http://www.x.com/"
};

//Number of replacements
var num = 1;

//Constructing regex
RegExp.escape = function(s) {
    return s.replace(/[-\/\\^$*+?.()|[\]{}]/g, '\\$&');
};
var keys = [];
for (key in patterns) {
    if (patterns.hasOwnProperty(key)) {
        keys.push(RegExp.escape(key));
    }
}
var regexen = [];
for (var i = 0; i < keys.length; i++) {
    regexen[i] = new RegExp("\\b(" + keys[i] + ")\\b(?![^<]*?<\/a>)", "i");
}

//Replace
for (var i = 0; i < regexen.length; i++) {
    var count = 0;
    var pattern = regexen[i];
    while (count < num) {
        o = o.replace(pattern, function(m, g1) {
            return "<a href='" + patterns[g1.toLowerCase()] + "'>" + g1 + "</a>";
        });
        count++;
    }
}
document.write(o);
android java, regex conditional replace sub content of the match (like javascript's str.replace(pattern, function(){})

android java, regex conditional replace sub content of the match (like javascript's str.replace(pattern, function(){})


By : Mark McQuillen
Date : March 29 2020, 07:55 AM
will be helpful for those in need Looks like using matcher may help to get the same. Is there better approach?
code :
    String passedInToken = "this is the token";
    String srcPath = "/pathabc";
    StringBuffer sb = new StringBuffer();
    String srcPatternString = "(src=\".*?\")";
    Pattern srcPattern = Pattern.compile(srcPatternString);

    String patternString = "(?:<img\\s)([^<]*)(?:token=\""+passedInToken+"\"\\s*)([^>]*)>";
    Pattern pattern = Pattern.compile(patternString);
    Matcher matcher = pattern.matcher(htmlStr);

     while(matcher.find()) {

        String srcPart = matcher.group(1) + " " + matcher.group(2);

        StringBuffer srcSb = new StringBuffer();
        Matcher strMatcher = srcPattern.matcher(srcPart);
        while (strMatcher.find()) {
                strMatcher.appendReplacement(srcSb, strMatcher.group(1)+ srcPath);
        }
        strMatcher.appendTail(srcSb);
                String srcStr = "<img \"" + srcSb.toString() + ">";
        matcher.appendReplacement(sb, srcStr);
    }
    matcher.appendTail(sb);
    String newHtmlStr = sb.toString();
Regex: Replace Parentheses in JavaScript code with Regex

Regex: Replace Parentheses in JavaScript code with Regex


By : user2258957
Date : March 29 2020, 07:55 AM
I hope this helps you . You don't have the right syntax for regex literals. They're written as
code :
/pattern/flags
var foo = li.replace(/[\s'()]+/g, "");
RegEx replace in Javascript doesn't replace

RegEx replace in Javascript doesn't replace


By : Tim
Date : March 29 2020, 07:55 AM
hope this fix your issue You have to pass a regular expression, not a string:
code :
var result = "/wiki/home/de/wikihome.md".replace(/(\/wiki\/home)\/..\/(.*\.md)/, "$1/en/$2");
document.body.innerHTML = result;
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