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JavaScript - Count String Characters
How can to obtain length of string variable, for example if I have:
var msg = 'hello world!'; Does it exist a method to count string characters? Similar TutorialsCan some one help me, I want to replace the characters from a string and I have tried with this script: Code: var v5=form.description.value.replace(/#/, "%23"); But it only changes the first character from the string. Turning #### into %23### but I want them all transformed. Hi, So I've got an array called questions_raw Code: questions raw = [
["<Q1> Question",
"choice1","choice2", "choice3"],
["<Q2> Question",
"choice1","choice2", "choice3"],
...
]
And I want to list all of the questions, but not the choices/answers. So far, I've managed to list just the questions, but because another function randomly sorts them, I need to sort them back into numerical order for a separate function (displaying the questions) I use characters (>,^) at the front to separate them into different answer types (just to explain the code) I try this to cut each string down so that they can be sorted numerically/alphebetically - Code: function linearlist()
{
var list = [];
var tempStr = "";
for (var l = 0; l < 145; l++)
{
tempStr = questions_raw[l][0];
list[l] = tempStr;
}
if (list.charAt(0)== " " ) list = list.substring(3) ;
if (list.charAt(0)== ">" ) list = list.substring(3) ;
if (list.charAt(0)== "^" ) list = list.substring(3) ;
var sorted = list.sort();
document.Qtext2form.Qtext2.value = sorted.join("\n");
}
But it doesn't like it - because "it has no method charAt" Any idea what i'm missing? Is it just that you have to put the [l] in every time you call a variable? Cheers I have a problem thats above my head, im new to javascript. I want to be able to control the first three characters of an input string on a login form. If a user types GP15555 or JP15555 I want it to change to GPL5555 or JPL5555 respectively changing the "1" to an "L" on the prefix is this at all possible? any point in the right direction would be great. heres my code Code: </script>
<script language="JavaScript" type="text/javascript">
//<![CDATA[
function Login(form) {
var password = form.password.value;
var pin = form.pin.value;
var product = form.product.value;
if (password) {
var htsite = product + "/" + password + "/" + pin + "/index.html";
window.location = htsite;
}
else {
alert("Please enter your password and pin.");
}
}
// End -->
//]]>
</script>
/thanks gp Here is the code i am trying. Code: var str="اسدف";
patt=/[\u0600-\u06FF\u0750-\u077F]/;
result=patt.test(str);
document.write("<br />Returned value: " + result);
</script>
This should return true, as the string in the str variable is indeed Arabic character. But it returns false. Need some help here on this.. Thanks in Advance I need to declare a variable (astString) and initialise it with a string of asterisks. astString needs to be the same length as another variable (otherString). otherString changes it value regularly so I think I need to use the .length property in some way but I can't see how! This should be simple but it's eluding me completely. Hey all, I have a simple example below showing how when I pass in the value of the value attribute of option node, and then use if operator to check whether parameter is a string or not, even though it's a string, it converts it to false boolean and triggers the else statement rather than calling a function: Code: <body> <select> <option value="createMsg">Add Message</option> <option value="removeMsg">Remove Message</option> </select> </body> Code: var menu = {
handleMenu : function(callback){
if(callback === "string"){
menu[callback]();
}
else {
console.log("Issue occurred")
}
},
createMsg : function(){
var content = document.createTextNode("Please give additional information."),
heading = document.createElement("h1");
heading.appendChild(content);
document.body.appendChild(heading);
},
removeMsg : function(){
}
}
document.getElementsByTagName('select')[0].onchange = function(){ menu.handleMenu(this.value)};
callback should be a string so why is it saying otherwise? Thanks for response Hi, I am not a Javascript programmer and I am facing some barriers. Maybe some of you could help me. I would need a script that can be used to count down until any given date with hour, minutes and seconds. For example: Quote: September 10, 2009 16:02:00 Bob Kuspe I've been looking everywhere for a script that counts up from 1 to 10, but can't find anything. I even searched the forums. Basically just something that starts from 1 and then replaces itself with 2, and so on. Thanks! I'm trying to figure out the proper way to correctly get each full-formation of encoded html (of Unicode), so that I could assign each HTML encoding with its each Unicode characters HTML Encoded Unicode: &#2344;&#2351;&#2366; &#2344;&#2375;&#2346;&#2366;&#2354; I want to retrieve each encoded HTML and assign them into array like this Code: var my_array = new Array();
my_array [0] = "2344";
my_array [1] = "2351";
my_array [2] = "2366";
my_array [3] = "2344";
my_array [4] = "2375";
my_array [5] = "2346";
my_array [6] = "2366";
my_array [7] = "2354";
Thanks in Advance for helps Need to know how to define hex characters for the following; var x = hex value var y new Array(hex value, hex value, etc) document.write(hex value) Deleted
I would like to count how many duplicate values I have in an array. My below attempt doesnt count the duplicate values: Code: var ct = 0;
for(var i = 0;i < myArray.length;i++)
{
var myData = getData[i].city;
if(myData == myData)
{
ct++;
}
alert("Total Count = " + ct);
}
Please advise the best way to do this. Hi, I want to do a redirect count so that the user can see the count going down. for example, I want them to be able to see the following. You will be redirected in 5 seconds. The user should be able to see the count going down from 5 to 4 to 3 to 2 to 1 and then they are redirected. I can get the page to redirect after 5 seconds but I want the user to be able to see it count down. Thanks in advance for your help hi i am new to javascript. i make a mcq quiz website in one of server side script. now for that website i want to make count down timer so when that quiz starts the user will have 5 minutes to complete that quiz if use does not able to complete quiz in given time then quiz should disable and shows the user score how can i achieve this First of all thanks for all the help you are providing. I am looking to alert a user if they type in an character that I am going to not allow for their input box Code: function IsExc (str){
var AllChr = "~ # $ % ^ { } [ ] ' ,";
var AC= AllChr.split(" ");
var SC = 0;
for (SC=0; SC <= AC.length; SC++){
var ACS = AC[SC];
if (str.search(ACS) >0 ) alert ('Cannot use the characters' + AllChr )
}
}
For reasons I don't understand the code will not work I have a simple function like this: Code: function chars_remaining()
{
var remaining = 200 - document.getElementById("text_box").value.length;
document.getElementById("number").innerHTML = 'Characters Remaining: ' + remaining;
}
And I call this onkeyup on the textarea. 200 chars max and what happens is when they type a character, it will still stay at 200 until they press another key. So when it will be 199, it should actually be 198. Onkeyup, onkeydown, onkeypress will all do the same thing. How can I make it so that as soon as they press a key it changes right away? Also I insert this into my database with mysql_real_escape_string, which is limited at 200 chars. When they keep typing and get to 0 remaining characters if they had any quotes, backslashes, etc. they will get added and thus some of their text will be cut off. I.e. lets say the text ended with "good luck". If they had 3 quotes in their text it might end up being "good l" instead because 3 backslashes had to be used to escape. So would the best thing to do be to count a quote, backslash, etc. as two characters instead of one. How would I do that in JS? I have a textbox ( I am using asp.net ). I want to use that textarea as rich text box. The text in textarea is submitted to database and then displayed. So, I can use <b><u> tags, but I want to use smileys too. I need a simple code for it. My logic is simple..., Whatever text is written inside the textarea is first read and when a group of specific character like Code: " :) ;) x-("
are found, that characters should be colored to red . So, a Code: :) will appear as Code: :) . This logic is simple but I am new to javascript programming, it cant implement it. Can a provide a javascript for this, or if you have better but simple code plz let me know. |
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