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JavaScript - Help Converting A Physical String To A Integer
Hi all,
I am having a problem converting a physical string to a integer. I have a dropdown list of a few items but are numbers though in chracters. I ned to output the value and the text of the selected item. As I cannot use a if-else statement, any help would be great. Code: <select id="std_num" onchange="displayValue()">
<option value="Two">Two</option>
<option value="Zero">Zero</option>
<option value="Five">Five</option>
<option value="Three">Three</option>
<option value="Two">Two</option>
<option value="Zero">Zero</option>
</select>
Code: function displayValue()
{
alert(document.getElementById('std_num').value);
var c = (document.getElementById('std_num').value);
}
Similar TutorialsHi, I have a javascript program that currently takes the contents of a *.txt file and converts it to a string-type variable using a hidden iframe. For my pruposes it would be much nicer to read a *.csv file instead, however the method I'm using creates the "open/save file" pop-up window. All files are client-side and in the same folder on one computer; this is NOT server-side or internet-based. It is simply javascript used in an HTA file as programming code. The *.csv does not need to be edited, just read. I need to know how to convert the text of this *.csv file into a string variable. I have heard of using "xmlHTTPRequest (AJAX)" but am not familiar with how to use this. Any advice or code would be greatly appreciated. First off, I would like to thank everyone who has offered their help so far in my little self-appointed project dealing with astral body locations. I finally have the script working the way it was intended to and am looking at cleaning it up at this point. One of the things I would like to do in cleaning it up is change the way values are inputed when converting from Polar Coordinates to Cartesian Coordinates. The script is currently set up such that Right Accension is input in three fields identified as Hours, Minutes and Seconds. By the same token, the Declination Angle is input through three fields identified as Degrees, Minutes and Seconds. What I would like to do at this point is convert each set of three input fields to a single input field and allow the user to input the values as; Right Accension = 13:23:15.2 Declination Angle = 22:17:33 I understand that these would be inputed as String values and am familiar enough with the Split feature to extract the individual pieces of string (in this instance they would be 13, 23, 15.2 and 22, 17 and 33). What I am not familiar with, however, is converting those string values into numbers. I have done a bit of research into it and haven't really found anything that makes sense to me just yet, so if anyone can offer a bit of guidance, I am all ears. Not looking for anyone to specifically write the code for me, but if one of you fine folks could point me in the right direction as far as tutorials go, I would be thankful. GW I have an Adobe pdf fill-able form field that requires a distance computation using javascript. One of the values needed in the computation is in the format of a string as feet - inches (for example: 4'-10"). I need to convert this into a number to use to complete a computation. Does anyone have a code snippet or any ideas on how to do this. Any assistance is greatly appreciated. Thanks. Can someone point me in the right direction for using Javascript to increase a number over time without refreshing the page? I also need it to continually go up, and not start at 0 on every refresh. Is this possible? Blockis Frustrated by the fact that you don't have the integer division operator in JavaScript? Here's a surprisingly little known method: parseInt(19/4) = 4 Now when a VBguru or vbscripter says "ha ha, I can integer divide and you can't!" You now know better. Hi all, this is my first post to this great useful forum. I have a javascript 2d array [x,y] that contains integer values like this: [0,0], [0,1], [0,2], [0,3], [1,0], [1,1], [1,2], [2,0], [2,1], [2,2], [0,-1], [0,-2], [0,-3], [1,-1], [1,-2], [2,-3] my question is how to get the max,min y value for each x. for the sample above it should give me another array with the following results [0,3],[0,-3],[1,2],[1,-2],[2,2],[2,-3] your help is highly appreciated Regards Omran In some cases toPrecision(X) will result in an integer value, which is the expected result. However, it is typical in some fields to always follow the integer value with a decimal and zero (i.e 522 --> 522.0). Technically, this would be incorrect since it would imply an extra digit of precision that does not exist. However, this is often disregarded, provided there are sufficient number of digits (i.e. precision of 5+). That said, is there any way to force an integer result to have a trailing ".0"? Hi, I was hoping you could help me, I was wanting to write text to the screen but without re-writing the whole screen (e.g. document.write();. I wish to take text and put it in a function, modify it, then display it. So far I have: Code: <script type = "text/javascript">
function calculate(text){
var x = "10.0";
var gpa = text.replace(/0.0/g,x);
document.getElementById("text").innerText=gpa;
}
</script>
<p id = text >Your Grade Point Average (GPA) is: 0.0</p>
<button type="button" onclick="calculate(text)">Calculate</button>
Your help would be really appreciated OVERVIEW of main webpage: when a user logs in, they will be directed to the main page of the website; and will see images displayed according to a value that was stored in the database. the main page preloads an image array: Code: <script type="text/javascript">
var img_FILE = [ 'images/house.png',
'images/car.png',
'images/boat.png'
];
</script>
easy enough the database holds a column of integers that are used to access the proper image in the array. i can successfully pull the integer value i need from the db. what i want to do is when the main page loads, i want the value that was pulled from the database to be used to display the correct image. example: lets say i pulled the value 2 from the db. then i want to display img_FILE[2] on the main page when the page "loads". Code: <body>
<div id="quadrantOne">
<img id="firstImg" src="images/blankImg.png" width="190" height="235" />
<script type="text/javascript">
$.post('imageScript.php', 'data=0', function(data,status){
if (status == 'success') { imgValue = data }
else { imgValue = 'error' }
document.getElementById('firstImg').src=img_FILE[imgValue];
});
</script>
</div>
</body>
i debugged imgValue and it is correctly assigned the value coming from the db. but..........the image won't appear on the main page. any ideas how to get this to work? thanks, Paul Williams Does JavaScript have an easy of converting an ordinary integer like 135 into a time format like 02:15? I'm working on a timer that handles the backend with just a plain integer that counts down every second but it needs to output looking like a clock.
Another homework assignment that I can't quite seem to get to work... I've been asked to do the following using javascript: -Create a function named randInt() with one parameter of "size". Declare a variable named "rNum" equal to a random integer between 1 and the value of the size variable. Return the value of the "rNum" varialbe from the function. -Create a function named getQuote() with one parameter anemd "qNum". The function should create an array named mtQuotes with five quotes; there should be no quote for the array index "0". Return the value of the mtQuotes array for the qNum index. - In the div element of "quotes" insert a script with the following commands: Declare a variable named "randValue" which is euqal to a random integer between 1 and 5 (use the randInt() function). Declare a variable named "quoteText" containing the quote whose array index value is equal to randValue. Write the value of quoteText to the web page. Here is what I have...it returns undefined. thanks. Code:
<html>
<head>
<script type="text/javascript">
function randInt(size) {
var rNum=Math.ceil(Math.random()*5);
return(rNum);
}
</script>
<script type="text/javascript">
function getQuote(qNum);
var mtQuotes = new Array();
mtQuotes[0] = "";
mtQuotes[1] = "I smoke in moderation, only one cigar at a time.";
mtQuotes[2] = "Be careful of reading health books, you might die of a misprint.";
mtQuotes[3] = "Man is the only animal that blushes or needs to.";
mtQuotes[4] = "Clothes make the man. Naked people have little or no influence on society.";
mtQuotes[5] = "One of the most striking differences between a cat and a lie is that a cat has only nine lives.";
return mtQuotes[qNum];
</script>
</head>
<body>
<div id="quotes">
<script type="text/javascript">
var randValue=randInt(5);
var quoteText=getQuote(randValue);
document.write(quoteText);
</script>
</div>
Well I have an array and a button to select a random integer from the array, how do I make it so that it selects every integer once til all are selected, then it starts over again? For example, an array has these: A B 1 2 Q F So you press the button a number of times, and you get: Q B 1 F A 2 Instead of: 1 Q A 1 B A I have some asp:radiobutton lists that need to update a label with the sum of their values each time a user selects a new value. I am brand new to javascripting and would like some insight on how to get this done. I have inserted my code below. Code: <asp:Label runat="server" Text="Greeting:" /> <asp:Label runat="server" ForeColor="Red" ID="lbl_GreetingScore" Text="0" /> <asp:RadioButtonList ID="rdb1_1" runat="server" RepeatDirection="Horizontal"> <asp:ListItem Selected="True" Text="N/A" Value="4" /> <asp:ListItem Text="Yes" Value="4" /> <asp:ListItem Text="No" Value="0" /> </asp:RadioButtonList> 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 Not sure if this should be in the ASP forum or this one (probably could go either), so here goes. I don't know hardly any - probably best to say dont know any at all - javascript. However I have a need to convert some code from asp to js. the code is checking to see if certain variables are null and if so counting how many of those variables are as such. the ASP looks like this: Code: <% Dim counter counter = 0 if a <> "" then classcounter = classcounter + 1 if b <> "" then classcounter = classcounter + 1 if c <> "" then classcounter = classcounter + 1 if d <> "" then classcounter = classcounter + 1 if e <> "" then classcounter = classcounter + 1 if f <> "" then classcounter = classcounter + 1 %> I need to know how to convert this to js so I can show this number to the user without sending data to the server first. I have searched the net for something similar but I am not having much luck finding any examples that do what I would like it to do (maybe this is not something that can/should be done in js?). I hope this makes sense...thanks! Hi, I was wondering - how can I convert something that a user draws inside canvas? Say, they draw a square, how could I convert that to print "You have drawn a square" - this would be posted to a text file. Thanks in advance. Code: <html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
</head>
<script type = "text/javascript">
var strCurrency = new Array(6);
strCurrency[0]="Pound";
strCurrency[1]="Marc";
strCurrency[2]="Franc";
strCurrency[3]="Dollar";
strCurrency[4]="Nordic";
strCurrency[5]="Fivesmon";
var dblExchangeRate = new Array(6);
dblExchangeRate[0]="1";
dblExchangeRate[1]="74";
dblExchangeRate[2]="8.54";
dblExchangeRate[3]="6.25";
dblExchangeRate[4]="98.1";
dblExchangeRate[5]="1.32";
function convertNumbers
{
}
</SCRIPT>
I want to see what the function would look like to be able to convert into different currencies by using arrays. I know that this would be a useless way to do it as they are updated every day, but it's for personal education purposes. (Note: The website contained a textbox in which to enter the amount in pounds, a drop-down box allowing the user to select currency, a button to click to convert, and another text box showing amount of money after converting.) Any help is greatly appreciated. I am trying to convert following pesudocose to javascript. Dont know where am i messing it up. Any help will be great PSEUDOCODE: Program TaxCalc Read purchase If(purchase>=0 AND purchase<=7) tax=0 else if(purchase>=8 AND purchase<=21) tax=1 else if(purchase>=22 AND purchase<=35) tax=2 else if(purchase>=36 AND purchase<=49) tax=3 else if(purchase>=50 AND purchase<=64) tax=4 else if(purchase>=65 AND purchase<=78) tax=5 else if(purchase>=79 AND purchase<=92) tax=6 else if(purchase>=93 AND purchase<=99) tax=7 else print error the number should be >=0 and <=99 print tax End Program JAVASCRIPT that I have so far <html> <body> <script type="text/javascript"> // Program name: Tax Calculation // Purpose: Find tax for amounts under $1 // Name: Niral Patel // Date: 2/15 START //Declare variables var purchase; //Amount to be entered by user var tax; //Tax to be calculated //Welcome the user //Ask them to enter an amount less than a dollar document.write("This program will help you calculate tax" + BR); document.write("Please enter the amount, the amount has to be less than a dollar" + BR); purchase = prompt("Enter the amount for which tax is to be calculated:",ES); purchase = parseInt(purchase) if (purchase >= 0 ) { tax = 0 } else if (purchase >= 7 ) { tax = 0 } else if (purchase >= 21 ) { tax = 2 } else if (purchase >= 35 ) { tax = 3 } else if (purchase >= 49) { tax = 4 } else if (purchase >= 64 ) { tax = 5 } else if (purchase >= 78 ) { tax = 6 } else if (purchase >= 92 ) { tax = 7 } else if (purchase >= 93 ) { tax = 6 } else if (purchase >= 99 ) { tax = 6 } else { document.write("Number should be between 0 and 99." +BR); } display tax; Stop </script> </body> </html> |
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