Compare String With Numbers In Javascript
Jul 23, 2005
if (123 > 33) will return true
and
if ("123" > 33) will return true
So my question is, if the above behaviors are the same?? If string is
a number, and compare with another number, it will be the same behavior as compare 2 numbers?
In this case, it is comparing 2 strings that are numbers, so they are
string comparisons here. correct?
if ("123" > "33") will return true
In this case, "33a" is not a number, that's why when it compare with
another number, it always return false. correct?
if ("33a" > 33) will return false...
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Jun 12, 2007
I need some advice regarding wrote a javascript function.
The function purpose is to check the variable "selectedSeat",
for e.g if the selectedSeat value is
var selectedSeat = "A:01|A:03|A:05|B:01|B:02|B:03";
var selectedArray = selectedSeat.split("|");
because row A is not in sequence , i will display alert box to
user,but row B is in sequence is ok.
Main purpose of function is check if the row is in the sequence.
I have been cracking my head about this , anyone have suggestion is
much appreciated.
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Jan 22, 2011
why the string comparison test doesn't work in this javascript function? It works if you use just text between the currentItem div tags, but not when you use html for an image. I even tried to use iso characters instead of angle brackets, as in "<img src=expand.png></img>" and still no dice. Why not?
Is it because of the way innerHTML manages html and it's not really a string? Is it because it doesn't have all the tags and some other representation?
Code:
<html>
<head></head>
<body>
[Code].....
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Apr 13, 2011
I'm still pretty new to javascript and dom, but have been coding with other languages for a while.When I try to compare a string to a .nodeValue it always fails, even if they are same. From what I've read typecasting is automatic in javascript or is this incorrect? For instance
var myGreet = "Hello";
var myFrag = myXML.lastChild.firstChild.firstChild.childNodes[0].nodeValue; returns Hello
if(myGreet == myFrag){ always returns false
alert(myFrag);
}
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Jan 7, 2006
i need a check that can go through a string to see if it contains any numbers.
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Feb 23, 2011
How can I write a string in JavaScript that will accept any phone number.
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Nov 25, 2009
I have this string: field = "due_date31"; is there a way to split it into two vars so it will be like:
var 1 = "due_date";
var 2 = "31";
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Feb 19, 2010
Let's say I have a string, something like this: sadasd4assadasd8ssssda5asadasd3asdasdasd8dsdsd
and I want to pick out the numbers and add them to each other. How do I do that? I have tried and know how to pick out one number, but how do I pick out several numbers and add them?
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Mar 24, 2011
I have a string like this: $433.00 As you can see it's a price with the Dollar sign, I need to convert that to an integer. How would I do that in Javascript?
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Dec 1, 2011
I'm triying to convert a string (0000, 0001, 0002, 0003,0004,0007, ..., ... )in INT. Betwen 0000 and 0007 theres no problem. But the 0008 is converted to 1. I'm using
Code:
Fnumb = parseInt(numb)
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Jul 7, 2011
I want to remove all symbols of an input string, so I have this javascript command:
Code:
this.value=this.value.replace(/[,.s;/\:{}[]<>?`~!@#$%^&*()_+-=]/g,"");
But, this command removes also the numbers. How can I keep the numbers but remove the symbols?
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Apr 21, 2006
I'm developing a web app and I want to validate a users input on a form. I need a regular expression to validate a string which must begin with a letter (i.e. A-Z or a-z) and must have 5 numbers (0-9) after it....
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Jul 8, 2010
I have a string variable coming from a database, like 2,3,1,4,5,6,7.
The string is gotten from: <%=(Recordset2.Fields.Item("neworder").Value)%>.
And, have the following:
Is it possible to use the string variable to replace the index numbers so there will be a new position of the array?
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Oct 16, 2010
I have JS object w/ following structure:
PHP Code:
json_data_object.422.name
thta should of out put me "hello world" as it is what it is in array but it does not as there is 422 there That's my ID from database, and I gotta use itNow, if I change that ID to something in letters say to "i" then everything is fine. ex
PHP Code:
json_data_object.i.name
That one would work, but then I have to chnge JSON string thta pulls data from DB and i cant really do that...So the question is how can I make 422 (numbers) works the same way as just string values in the array/object tree?
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Apr 7, 2009
I need to modify the script showed at: [URL]
Right now it allows entering "numbers only", I need it so that it allows numbers and alphabets only, no special characters or spaces.
And yes, one more question, does the first part of the code need to be added in the <head> of the document or <body> ?
The code at the above URL is as follows:
<script type="text/javascript">
// initialise variable to save cc input string
var cc_number_saved = "";
</script>
[Code].....
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Jul 23, 2005
for all your javascript trimming needs...
function trim(inputString) {
if (typeof inputString != "string") return inputString;
return inputString
//clear leading spaces and empty lines
.replace(/^(s|
|
)*((.|
|
)*?)(s|
|
)*$/g,"$2")
//take consecutive spaces down to one
.replace(/(s(?!(
|
))(?=s))+/g,"")
//take consecutive lines breaks down to one
.replace(/(
|
)+/g,"
")
//remove spacing at the beginning of a line
.replace(/(
|
)s/g,"$1")
//remove spacing at the end of a line
.replace(/s(
|
)/g,"$1");
}
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Jul 20, 2005
New to javascript and still getting my head around strings...
Consider the following line of code...
var path = location.pathname;
....after execution, the variable "path" contains something like
"file:///C:/Documents%20and%20Settings/user/Desktop/Test/fileread.htm"
How do I parse this down to "C:Documents and SettingsuserDesktopTest"
....or at least to "C:/Documents%20and%20Settings/user/Desktop/Test"
Is there a better function to retrieve the source folder containing the
current HTML document?
I need to know the path to the current folder to reference other files in
the same directory using a FileSystemObject.
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Sep 19, 2004
Date format:
2003/03/15 04:00
2003/12/13 12:00
2004/02/12 13:12
2001/04/22 21:24
How can I sort all this date by the latest using JavaScript?
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Mar 31, 2006
I've a function like this: Code:
function submit_msg() {
if (egsd.value == 'yes') {
write_msg("<b>" + chatkeo.value + " : " + chatmsg.value + "</b><br />");
} else {
write_msg(chatkeo.value + " : " + chatmsg.value + "<br />");
}
chatmsg.value="";
}
Now I need to do some string replace in chatmsg.value, ie, I need to look for some piece of text in chatmsg.value, and in case they are present (there may be multiple occurences of the same), to replace them with something else. This is what I got by doing a google search: Code:
function replaceAll( str, from, to ) {
var idx = str.indexOf( from );
while ( idx > -1 ) {
str = str.replace( from, to );
idx = str.indexOf( from );
}
return str;}
chatmsg.value = replaceAll( chatmsg.value, "string to replace", "new string" );
And I place this second function just above the previous one. But it's not working. Any help friends?
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Jul 7, 2006
I have the following javascript function:
<script type="text/javascript">
function HTMLEncode( text )
{
text = text.replace(/&/g, "&") ;
text = text.replace(/"/g, """) ;
text = text.replace(/</g, "<") ;
text = text.replace(/>/g, ">") ;
text = text.replace(/'/g, "'") ;
return text ;
}
</script>
Now i want to store the content of 'text' in a php string. Is that possible?
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Dec 14, 2006
Does anyone have a reputable reference about internal string storage in
JavaScript? (for some particular implementation I mean).
Say having 1,048,576 characters long string from the geometric
progression:
function generateLargeString() {
var s = 'a'
for (var i=1; i<21; ++i) {
s = s.concat(s);
}
return s;
}
- the internal size should be 2 mebibytes and not 1 (?) if strings are
indeed stored as Unicode 16-bit. From the other hand it would be
tempting for an engine developer do not spend extra bytes on ASCII
chars...
So does anyone know of any documented engine optimizations on the
matter? Would be expected on some engine to have the string from above
twice smaller than say
function generateLargeString() {
// 1200 ETHIOPIC SYLLABLE HA
var s = String.fromCharCode(0x1200);
for (var i=1; i<21; ++i) {
s = s.concat(s);
}
return s;
}
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Sep 4, 2006
The URL is similar to:
https://url.com/form.htm?string=p,val1*l,val2*m,val3*t,val4*d,val5
Within the form, I have the following statement:
<input type="hidden" name="string">With this statement, string should take the value "p,val1*l,val2*m,val3*t,val4*d,val5"
I'm having a problem with the following script:
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Feb 14, 2005
i'm trying to create some javascript string variables using php. i'm running into a problem because some of the variables span multiple lines and this is causing a problem. here is a sample of what i'm trying to do:
var thetext1=new Array()
thetext1[0]="info for #1 goes here"
thetext1[1]="info for #2 goes here"
thetext1[2]="info for #3 goes here"
etc.... the array values are output from a mysql db using php and used for a script i have on my page.
the problem is some of my strings span multiple lines and end up making it look like:
thetext1[36]= "this is an example
of how some stuff spans
multiple lines"
Using the javascript console in firefox i see the problem is: "Error: unterminated string literal." I believe it is because the string I am trying to input is spanning multiple lines. any idea on how to fix this?
i'm using php/mysql to create these javascript variables so i have access to their functions. i tried doing this:
str_replace( "
", '', $row['text']);
to replace the newlines with nothing but they're still there.
any ideas on how to get around this?
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Oct 6, 2005
I have a schedule web page that is a glorified big table. This table is broken by days of the week, and into 1 hour incraments. This schedule is based on Eastern Standard time. To make this schedule easier to read for people of various time zones, I wish to highlight the day of the week heading and the hour of the day. To do this, I am going to write a perl program that is linked to off the navigation, which will acquire the server time and date and then generate the schedule html with javascript inserted into it which has a variable set by the perl program with the server date and time.
My question deals with the javascript. I beleive I need to use the String.fontcolor method so that I can change the color of the heading text to be different then all the rest of the table. But, do I define this javascript variable in the head section of the html with the string.fontcolor in the table accessing that varible? This is where I am definatly in serious gray area as to how I would define or do this. I don't think the javascript I would have to drive would be great, a if statement in the day headings. Day equal, change the font color. Else, default font color. Time of day equal(hour).
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Jun 6, 2007
I was trying:
Code:
<script>
function testtrim(value) {
alert(value.trim());
}
testtrim("Alex ");
</script>
The javascript don't work, my firebugs says:[value.trim is not a function] how to simulate an trim function?
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Jul 23, 2005
I'm trying to perform a very simple validation of user input. I
want to verify that the user entered a six-digit string consisting
entirely of numbers. So anything from 000000 to 999999 is considered
valid. The problem that I'm having is getting the validation to work on
the entire string. In other words, 000000 is okay but 000000000000 is
also returning as a match. Here's a quick code block...I have something
along these lines....
/*********************/
<html>
<body>
<INPUT name="txtNumberField" type="text" id="txtNumberField">
<INPUT onClick="fnTestNumberField()" id=Button1 type=button value="Test
Number!" name=btnTest>
<script language=javascript>
function fnTestNumberField()
{
var sNumberValue = document.getElementById("txtNumberField").value;
if (sNumberValue.match(/A[0-9]{6}z/))
{
alert("match");
} else {
alert("no match");
}
}
</script>
</body>
</html>
/******************/
That is failing when I enter 123456 into the textbox. Why, though? I
know I can replace...
if (sNumberValue.match(/A[0-9]{6}z/))
....with something like...
if (sNumberValue.length == 6 && sNumberValue.match(/[0-9]{6}/))
....or I could assign a maxlength to the input box, of course. The thing
is, I really want to know WHY the regular expression isn't responding
as I'd expect. Is there a syntax error somewhere in the code?
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