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JavaScript - Character Counting
Hi Im new to javascript and need some help with a project I have, the task I have is:
Create a page that can take a bloke of text and out put the following o How many times each letter occurs o How many spaces o How many words o How many times each word occurs o A list of things that are not words or special characters I think maybe use an array but im not sure, like I said im new to this so not too sure on how to do it. I know it would read into a file say a txt file and sort through it this way, possibly using some kind of loop to read through all of the text before sorting it and I know it might use variables. I know how to kind of work through the task I have, but to actually implement the mechanics of the javascript is something that I then struggle with Thanks to all that help. Similar TutorialsI have a vertical menu in which the sub menu is a box that pops out to the right and the user can click boxes to make selections (input check boxes). I would like some way to indicate to the user after they have left the sub menu, that they have made selections within that sub menu. Perhaps a number after the menu item name, in which the number of sub menu selections are indicated in parenthesis? Is this possible? Code: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Test Project</title>
<script type="text/javascript">
var clicks=0;
function linkClick(){
document.getElementById('clicked').value = ++clicks;
}
</script>
</head>
<body>
<p align="center"><a href="http://www.google.ie" target="_blank" onclick="linkClick()">Google</a></p>
<p align="center"> </p>
<p align="center"><a href="http://www.google.ie" target="_blank" onclick="linkClick()">Google</a></p>
<p align="center"> </p>
<p align="center"><a href="http://www.google.ie" target="_blank" onclick="linkClick()">Google</a></p>
<p align="center"> </p>
<td colspan="3" valign="top">You have clicked my links <input id="clicked" size="1" onfocus="this.blur();" value="0" > times</td>
<Script Language="JavaScript">
if ("clicks">3);
{
window.open('http://ie.yahoo.com','','scrollbars=no,menubar=no,height=600,width=800,resizable=yes,toolbar=no,location=no,status=no');
}
</Script>
</body>
</html>
I am a complete novice, I've spend most of today trying to research and learn Javascript. I would like my page to keep a count of how many times the links have been opened (this is happening) I would like a new pop up window to occur when the count gets to a specif value (this isnt happening) OR maybe to have a new hyperlink to appear that the user can then click on? Thanks in advance. Hello all! I've run into a few hour long snag and cant seem to get thru it. My homework says to write a JS program form with an identifying lable, an associated text area and 2 buttons. The buttons should have text that says "# letter occurrences" and one that says "# word occurrences". Each button should call an associated JS function. The # letter occurrences routine should print a table indicatin the number of occurrences of each letter off the alphabet in the text area, the # word occurrences routine should print a table indicating the number of one letter wors, the number of two letter words, the number of three letter words, up to 10 letter words ... So far here is what I have ..... <?xml version = "1.0" encoding = "utf-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns = "http://www.w3.org/1999/xhtml"> <head> <title>random</title> <script type="text/javascript"> var tableLetter="textArea"; var tableWord="textArea"; var lengthOfWord="tableWord.Length"; function ShowDiv(divName) { HideDivs(); if (document.all) { document.all.tableLetter.style.visibility = "visible"; } else { document.getElementById(divName).style.visibility = "visible"; } } function HideDivs() { if (document.all) { document.all.tableLetter.style.visibility = "hidden"; document.all.tableWord.style.visibility = "hidden"; } else { document.getElementById('tableLetter').style.visibility = "hidden"; document.getElementById('tableWord').style.visibility = "hidden";} } </script> </head> <body> <form name="form1" method="post" action=""> <textarea name="textArea" rows=6 cols=50> How many occurrences are in your sentence? </textarea> <br /> <input type="button" onClick="ShowDiv('tableLetter')" name="button1" value="# Letter Occurences"> <input type="button" onClick="ShowDiv('tableWord')" name="button2" value="# Word Occurences"> </form> <br /> <div id="text containter" style='width:420; height:85px; background:silver; position: absolute; '> <table> <div id='tableLetter' style="position:absolute; left:5px; top:10px"> <font color='#0000FF'>Letter Occurrences </font> </div> </table> <div id='tableWord' style='position:absolute; left:5px; top:10px; visibility:hidden;'> <font color='#0000FF'>Word Occurrences.</font> </div> </div> </body> </html> Hi, I need to count how many times a keyword (input) appears in a string (str). I think I'm getting close with this: Code: var input = document.getElementById('autocomplete').value;
var inp = input;
for (var j = 0; j < gmarkers.length; j++)
{
var str=gmarkers[j].myname;
var patt1=new RegExp(inp,'i');
if (str.match(patt1))
{
found = true;
var box = [inp];
var string1 = str;
for (var i=0;i<box.length;i++) {
nCount = string1.split(box[i]).length-1;
alert(box[i] + ' is found ' + nCount + ' times<br>');
}
but I can't get it to actually work. any ideas? thanks in advance. Hi all, I have an array holding 100 randomly generated integers between 0-9 inclusive...firstArray[99] how do i use a second array to keep count of how many times each integer is generated..secondArray[9] I feel stupid for asking a question about searching arrays, when there's a very similar thread that has been answered just recently on the first page; however, I'm still having trouble contemplating my own scenario. Basically, my program prompts the user for the length of the array and then asks the user to fill the array with words. Here is where I need help: I want to confirm if the user wants to search the array for those words. If so, the user will then be prompted to enter the word he wishes to search for; if found, the location of that word will be reported and the number of times the word has been searched for will be kept track of in a separate array. Here is what I have so far: Code: /* -- phase 3 ------------------------------------------------------
search for words the user asks for
*/
// search variables
var response;
var search;
while (true) {
// confirmation protocol
response = confirm("Do you wish to search the lexicon for a word?")
if (response) {
search = prompt("What word would you like to search for?");
// alert("search");
}
else {
alert("Thank you for wasting my time.");
break;
}
// begin search protocol
for (i=0; i<words.length; i++) {
if (search==words[i]) { alert("Word found at" +i+);}
} // end for loop
else {alert("word not found.");}
// counter array/accumulator
var hits = new Array(words.length);
hits[i] = 0;
for (i=0; i<words.length; i++) {
if (words[i] == search) {
hits[i] = hits[i] + 1;
alert("This word has been searched for " +hits[i]+ "times.");
}
} // end for loop
} // end while
The problem with my search seems to be that the search is parsed through the for loop; if it finds the word it alerts me that it was found at i location, but then it continues through and sees that the search does not equal the other values in the array and reports it's not found as well. My counter array is completely off, and I'm really at a loss to figure it out. I can see that the problem might be that each new search resets the hits[i] to equal 0, so no matter how many times a word is searched for, it returns a count of 1. I really want this array to track the number of hits for each word searched for, but have no clue why it's not working. Thanks for any help I can get; and please, feel free to critique my coding style, I definitely need to improve. How can i go about showing on screen a count from an initial value to an end value over a set time period. Initial value = 0 End value = 2000 Time = 25 seconds I cant find an example of this anywhere, so I'm trying here to see if somebody can help Hi all, as the title says i am trying to keep count of the number of words a user has typed into a textbox. I have an emoticon box, something like the one that you see when you reply/start a thread here. The mouseup event fires off when the user clicks on an emoticon to display it in the textbox. The problem here is, my code below does not start counting if an emoticon is added when theres nothing in the textbox (making the emoticon the first item). I can continue to add more smileys in and they will be counted in the word limit, but the first one will not be included in the count, unless the user clicks somewhere on the screen. How can i fix this problem? Code: //#message is the textbox
$(document).ready(function()
{
var characters = 100;
$("#remainder").append(characters+"words left");
$("#emoticonsbox").mouseup(function()
{
var remaining = characters - $("#message").val().length;
$("#remainder").html(remaining+"words left");
});
});
Hello I have this snippet for controlling the number of characters entered in a textarea. It works. But, if I replace in this code the name "my_form" by "contact-form" and "my_text" by "message", it doesnt ! It looks like the keyword is " my_form ". You change that , and the script will not work! It turns out that I have to change those names because the form as it was already had those names my_form and message before I added this counter And I dont want to replace the names of the form in order to adapt them to this code snippet below. The question is why would the script not work if I have just replaced two words, which dont seem to be keywords of JS programming (my_form and my_text) <html><head> <title>(Type a title for your page here)</title> <script language=JavaScript> <!-- function check_length(my_form) { maxLen = 50; // max number of characters allowed if (my_form.my_text.value.length >= maxLen) { // Alert message if maximum limit is reached. // If required Alert can be removed. var msg = "You have reached your maximum limit of characters allowed"; alert(msg); // Reached the Maximum length so trim the textarea my_form.my_text.value = my_form.my_text.value.substring(0, maxLen); } else{ // Maximum length not reached so update the value of my_text counter my_form.text_num.value = maxLen - my_form.my_text.value.length;} } //--> </script> </head> <body> <form name=my_form method=post> <textarea onKeyPress=check_length(this.form); onKeyDown=check_length(this.form); name=my_text rows=4 cols=30></textarea> <br> <input size=1 value=50 name=text_num> Characters Left </form> </body> </html> Specifically i was wondering if anyone had any ideas on how to select the specific character when hovering over a word? I have not been able to find any documentation on this however, there is a demo site i found for a plugin that allows character selection. http://labs.bitmeister.jp/moamoa/demo.html i dont need anything that large and elaborate... Edit I'm pretty wel experinced with jquery, I know it's possible with jquery Hello all, I need assistance checking for valid characters in a username/password set up. I have been reading up on form validation but can't find exactly what I am looking for and need help deciphering what's going on. I have a list of accepted characters: "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789.-_@" a-z, A-Z, 0-9, dot, dash, underscore, and at. I want to then check an inputed string against that set and if a character is notin the accepted set, to send an alert. Here is what I have gathered so far: a for loop that increments through the values' .length - this is what checks each individual character. Then use of indexOf() can tell me which character is unacceptable. Now is where I am stuck and coming to you. Please help Hi all, I cant get this code to work because I do not know how to include the % character. Any help would be appreciated. My line break isnt working either Cheers, Adrian Code: rightButton.innerHTML = (rightOutcome1Prob+" chance of "+rightOutcome1+"\r\n else "+rightOutcome2); Hey Guys, I wanted to prepend a character to menu items when the mouse will hove over them. An example of this is seen on the website of Minivegas, he http://minivegas.net/ When you hover over a menu item at the top a slash appears in front. There seems to happen a couple of things to smoothen out the effect of prepending the character. I was looking for a similarly smooth way of adding a character in front of my menu items. Can anybody help me out on how to do this? I'm also unable to find out exactly how they did it on the Minivegas website. Anybody any ideas? Thanks in advance! Regards, Roy Ok I have a textarea field that is validated by Js, this textarea can and will contain the newline character Code: \n so I validate in JS Code: if(textareaname.value.length < 200) this hten goes through to my php where i also check before I place in to the Database using MYSQL Code: if( strlen($_POST['textareaname']) < 200 ) but my php is giving me a different string length from my javascript. It looks as if Javascript is counting a newline as 1 character and php is treating it as 2. I have checked my slashes, I have used various REgex to check these data amounts. I have also Googled around and there doesnt seem much around. Any ideas? Any suggestions as to how I can make php and javascript treat a newline as the same amount of characters? Thanks in advance. So say if my string was.. Code: a = "Hello"; alert(a); How do I get it to say; Code: alert("ello");
So how do I take off the 'H' in this example.. H, I'm trying to create an sms form. but I want the users to be able to monitor the characters and sms number as they type...taking 160 characters to be 1 page. pls I'll need help with coding this form to display characters left in 'ch_count' box and number of pages in the 'pages' box while typing in the 'message' textarea....hope it's clear enough...thanks Code: <p> <textarea name="message" cols="" rows="" id="message"></textarea> </p> <p> <input name="ch_count" type="text" id="ch_count" size="8" /> characters left <input name="pages" type="text" id="pages" size="8" /> pages </p> Suppose I have the string 'ello'. I want to insert the letter 'h' in the beginning of that string. How do I do that without using a special function? I can only use the functions charAt and indexOf - anyone has any idea? Hi i need a little help on a JavaScript program it ask the user for a keyboard character and a number of rows and columns to look like this RRRRR R___R R___R R___R RRRRR and also this in another program rrrrrr rrrrrr rrrrrr rrrrrr I currently have <html><body> <script type="text/javascript"> // Declare variables and constants var userInputText; // user input to go var numRow; // number of the rows var NumCol; // number of the columns var ES = ""; // empty string userInputText = prompt("Enter a keyboard character",ES); numRow = prompt("Enter the number of rows",ES); NumCol = prompt("Enter the number of columns",ES); //need a nested loop to draw the character box </script> </body> </html> if any one can help me finish this program i would appreciate it Hi, it's my first post and first thread, actually I joined to ask this question. I did try searching first but for some reason when I put this character in google search fields I never find what I want, maybe not being recognized. here's the code Code: this.size=a.size||2000; this.handle_event=a.handle_event||'click'; my question ... what is the || character(s)? I'm sure this must be laughably simple and thanks in advance (new to learning js) |
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