How to globally replace a forward slash in a JavaScript string?
The following would do but only will replace one occurence:
"string".replace('/', 'ForwardSlash');
For a global replacement, or if you prefer regular expressions, you just have to escape the slash:
"string".replace(/\//g, 'ForwardSlash');
Use a regex literal with the g modifier, and escape the forward slash with a backslash so it doesn't clash with the delimiters.
var str = 'some // slashes', replacement = '';
var replaced = str.replace(/\//g, replacement);
You need to wrap the forward slash to avoid cross browser issues or //commenting out.
str = 'this/that and/if';
var newstr = str.replace(/[/]/g, 'ForwardSlash');
Without using regex (though I would only do this if the search string is user input):
var str = 'Hello/ world/ this has two slashes!';
alert(str.split('/').join(',')); // alerts 'Hello, world, this has two slashes!'
Is this what you want?
'string with / in it'.replace(/\//g, '\\');
This has worked for me in turning "//" into just "/".
str.replace(/\/\//g, '/');
Hi a small correction in the above script..
above script skipping the first character when displaying the output.
function stripSlashes(x)
{
var y = "";
for(i = 0; i < x.length; i++)
{
if(x.charAt(i) == "/")
{
y += "";
}
else
{
y+= x.charAt(i);
}
}
return y;
}
This is Christopher Lincolns idea but with correct code:
function replace(str,find,replace){
if (find){
str = str.toString();
var aStr = str.split(find);
for(var i = 0; i < aStr.length; i++) {
if (i > 0){
str = str + replace + aStr[i];
}else{
str = aStr[i];
}
}
}
return str;
}
Example Usage:
var somevariable = replace('//\\\/\/sdfas/\/\/\\\////','\/sdf','replacethis\');
Javascript global string replacement is unecessarily complicated. This function solves that problem. There is probably a small performance impact, but I'm sure its negligable.
Heres an alternative function, looks much cleaner, but is on average about 25 to 20 percent slower than the above function:
function replace(str,find,replace){
if (find){
str = str.toString().split(find).join(replace);
}
return str;
}
var str = '/questions'; // input: "/questions"
while(str.indexOf('/') != -1){
str = str.replace('/', 'http://stackoverflow.com/');
}
alert(str); // output: "http://stackoverflow.com/questions"
The proposed regex /\//g did not work for me; the rest of the line (//g, replacement);) was commented out.
You can create a RegExp object to make it a bit more readable
str.replace(new RegExp('/'), 'foobar');
If you want to replace all of them add the "g" flag
str.replace(new RegExp('/', 'g'), 'foobar');
Related
Ive a situation to remove some words from a delimitted string in which the last char is ¶.
That means that if the string is:
keyword1,keyword2,keyword3¶,keyword4,keyword5¶,keyword6
The output string should be:
keyword1,keyword2,keyword4,keyword6
How can we achieve that in javascript?
This is what i did but i would like to do it without looping:
var s='keyword1,keyword2,keyword3¶,keyword4,keyword5¶,keyword6';
s=s.split(',');
var t=[];
$(s).each(function(index,element){
var lastchar=element[element.length-1];
if(lastchar!='¶')
{
t.push(element);
}
});
console.info(t.join(','));
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
Problem can be solved using regular expressions:
var s='keyword1,keyword2,keyword3¶,keyword4,keyword5¶,keyword6';
s=s.replace(/,keyword\d+¶/g, '');
console.info(s);
You should use the filter functionality in the JS.
var _s = "keyword1,keyword2,keyword3¶,keyword4,keyword5¶,keyword6";
var _output = _s.split(",").filter(function(word){
return (word[word.length - 1] !== "¶");
}).join(",");
console.log(_output);
Regular expressions should work. They are likely slower than writing your own loops, but in most cases they are clearer and you won't notice the difference.
var s='keyword1,keyword2,keyword3¶,keyword4,keyword5¶,keyword6';
console.info('original: ' + s);
var edited = s.replace(/¶.+¶/, '');
console.info('result: ' + edited);
var s = 'keyword1,keyword2,keyword3¶,keyword4,keyword5¶,keyword6';
var t = s.split(",").filter(function(word) {
return !word.slice(-1).match(/[\u{0080}-\u{FFFF}]/gu, "");
})
console.info(t);
You can use the filter! Obviously this checks for any character that isn't ASCII. You can simply check if the last character is your ¶.
This way:
var str ='keyword1,keyword2,keyword3¶,keyword4,keyword5¶,keyword6';
var keywords = str.split(",");
for(keyword in keywords){
if(keywords[keyword].includes("¶")){
keywords.splice(keyword,1);
}
}
console.log(keywords);
PS: Every method loops to do it, you just can't see it in some forms ^^
I have a string that needs to be parsed as JSON.
The problem is, it may sometimes contain double quotes, causing errors in parsing.
For example:
{
"id_clients":"58844",
"id_clients_name" : ""100" test"qw"
}
I need a regex to replace any double quotes between the opening and closing " with a \".
Thanks.
I tried it just for fun, even though it is certainly better to fix the generator. This might work in your case, or at least inspire you:
You can try it here
$( function()
{
var myString = "{ \"na\"\"me\": \"va\"lue\", \"tes\"\"t\":\"ok\" }";
var myRegexp = /\s*\"([\w\"]+)\"\s*[,}:]/g;
var match;
var matches = [];
// Save all the matches
while((match = myRegexp.exec(myString)) !== null)
{
matches.push(match[1]);
console.log(match[1]);
}
// Process them
var newString = myString;
for (var i=0; i<matches.length; i++)
{
var newVal = matches[i].replace(/\"/g, '\\\"');
newString = newString.replace(matches[i], newVal);
}
alert(myString + "\n" + newString);
}
);
You can try, although this will work only for the opening tags :
.replace(/\"\"/g, '\\""');
i have a problem i'm trying to solve, i have a javascript string (yes this is the string i have)
<div class="stories-title" onclick="fun(4,'this is test'); navigate(1)
What i want to achieve are the following points:
1) cut characters from start until the first ' character (cut the ' too)
2) cut characters from second ' character until the end of the string
3) put what's remaining in a variable
For example, the result of this example would be the string "this is test"
I would be very grateful if anyone have a solution.. Especially a simple one so i can understand it.
Thanks all in advance
You can use split() function:
var mystr = str.split("'")[1];
var newstr = str.replace(/[^']+'([^']+).*/,'$1');
No need to cut anything, you just want to match the string between the first ' and the second ' - see similar questions like Javascript RegExp to find all occurences of a a quoted word in an array
var string = "<div class=\"stories-title\" onclick=\"fun(4,'this is test'); navigate(1)";
var m = string.match(/'(.+?)'/);
if (m)
return m[1]; // the matching group
You can use regular expressions
/\'(.+)\'/
http://rubular.com/r/RcVmejJOmU
http://www.regular-expressions.info/javascript.html
If you want to do the work yourself:
var str = "<div class=\"stories-title\" onclick=\"fun(4,'this is test'); navigate(1)";
var newstr = "";
for (var i = 0; i < str.length; i++) {
if (str[i] == '\'') {
while (str[++i] != '\'') {
newstr += str[i];
}
break;
}
}
Let's say I have a string like this:
var str = "/abcd/efgh/ijkl/xxx-1/xxx-2";
How do I, using Javascript and/or jQuery, remove the part of str starting with xxx, till the end of str?
str.substring( 0, str.indexOf( "xxx" ) );
Just:
s.substring(0, s.indexOf("xxx"))
A safer version handling invalid input and lack of matching patterns would be:
function trump(str, pattern) {
var trumped = ""; // default return for invalid string and pattern
if (str && str.length) {
trumped = str;
if (pattern && pattern.length) {
var idx = str.indexOf(pattern);
if (idx != -1) {
trumped = str.substring(0, idx);
}
}
}
return (trumped);
}
which you'd call with:
var s = trump("/abcd/efgh/ijkl/xxx-1/xxx-2", "xxx");
Try using string.slice(start, end):
If you know the exact number of characters you want to remove, from your example:
var str = "/abcd/efgh/ijkl/xxx-1/xxx-2";
new_str = str.slice(0, -11);
This would result in str_new == '/abcd/efgh/ijkl/'
Why this is useful:
If the 'xxx' refers to any string (as the OP said), i.e: 'abc', '1k3', etc, and you do not know beforehand what they could be (i.e: Not constant), the accepted answers, as well as most of the others will not work.
Try this:
str.substring(0, str.indexOf("xxx"));
indexOf will find the position of xxx, and substring will cut out the piece you want.
This will take everything from the start of the string to the beginning of xxx.
str.substring(0,str.indexOf("xxx"));
I have strings like Name:, Call:, Phone:....and so on in my table. I am learning jQuery and was able to access the text. My tutorial has used trim() to remove any whitespaces. But I want o remove ":" from the end of each string (and yes, it always lies in the end after calling trim() method). So how to achieve it.
Its my code:
<script type="text/javascript">
$(function ()
{
$(':input[type=text], textarea').each
(
function ()
{
var newText = 'Please enter your ' +
$(this).parent().prev().text().toLowerCase().trim();
$(this).attr('value', newText);
}).one('focus', function ()
{
this.value = '', this.className = ''
}).addClass('Watermark').css('width', '300px');
});
</script>
trim(":") did not help...
You can replace all : characters:
var str = '::a:sd:';
str = str.replace(/:/g,''); // str = 'asd';
Or use a handy rtrim() function:
String.prototype.rtrim = function(character) {
var re = new RegExp(character + '*$', 'g');
return this.replace(re, '');
};
var str = '::a:sd:';
str = str.rtrim(':'); // str = '::a:sd';
In this case just use the plain old JavaScript replace or substr methods.
You can also use a regular expression that looks for colon as the last character (the character preceding the regexp end-of-string anchor "$").
"hi:".replace(/:$/, "")
hi
"hi".replace(/:$/, "")
hi
"h:i".replace(/:$/, "")
h:i
This is a simplified, inline version of the rtrim function in Blender's answer.
EDIT: Here is a test fiddle for Blender's corrected rtrim function. Note that his RegExp will delete multiple occurrences of the specified character if the string ends with multiple instances of it consecutively (example bolded below).
http://jsfiddle.net/fGrPb/5/
input = '::a:sd:' output = '::a:sd'; input = 'hi:' output = 'hi'; input = 'hi:::' output = 'hi'; input = 'hi' output = 'hi'; input = 'h:i' output = 'h:i'
To chop the last character of a string use string.slice(0,-1)
You can use a regular expression to remove the colon (:).
Replace one instance:
var with_colon = 'Stuff:';
var regex = /([^:]*):/;
var without_colon = regex.exec(with_colon)[1];
alert(without_colon);
Result: Stuff
Replace all instances:
var with_colon = 'Stuff: Things:';
var without_colon = with_colon.replace(/([^:]*):/g,'$1');
alert(without_colon);
Result: Stuff Things
var myStr = "something:";
myStr = myStr.slice(0, -1);
var a="name:";
var b=a.split(":");
alert(b[0]);
one way is to use lastIndexOf
var str='Name:, Call:, Phone:';
var index=str.lastIndexOf(":");
alert(index);
var s=str.substring(0,index);
alert(s);
DEMO
This checks if the last character is a colon. If it is, the last character is removed.
if (str[str.length - 1] === ":") {
str = str.slice(0, -1);
}
If there can be multiple trailing colons, you can replace if with while, like this:
while (str[str.length - 1] === ":") {
str = str.slice(0, -1);
}
You could even make a generic trim function that accepts a string and a character and trims trailing instances of that character:
var trim = function(str, chr) {
while (str[str.length - 1] === ":") {
str = str.slice(0, -1);
}
return str;
}
function trim(str) {
str = str.replace(/^:*/,"");
return str.replace(/:*$/,"");
}
str = str.substring(0,str.lastIndexOf(":"));
Note that this removes everything from the last : to the end of the string (for example, any whitespace after the :).