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Changing an array value to upper case?

P: n/a
I tried using the "toUpperCase()" property to change the value of an array
entity to uppercase BUT it tells me that the property is invalid. It seems
that an array is not considered an object when it is assigned a text
literal?? HOW can I change the array value to upper case then? What other
method exists for arrays?

Ex:
var GridArrayName1 = new Array();
GridArrayName1[0] = new Array ('test-value');
GridArrayName1[0] = GridArrayName1[0] .toUpperCase();

The above won't work. I even tried assigning it to an object then using the
object's "toUpperCase()", but after the assignment the object now longer has
that property either??

'Sup?

thx,

--
=================================================
Mike S. Nowostawsky:
Email: mi******@sympatico.ca, mi******@yahoo.ca
Home Page: http://www3.sympatico.ca/mikenowo/
Lachine (Montreal), Quebec, Canada
Jul 20 '05 #1
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8 Replies


P: n/a
>It seems that an array is not considered an object when it is assigned a text
literal?? HOW can I change the array value to upper case then? What other
method exists for arrays?

Ex:
var GridArrayName1 = new Array();
GridArrayName1[0] = new Array ('test-value');
GridArrayName1[0] = GridArrayName1[0] .toUpperCase();

The above won't work. I even tried assigning it to an object then using the
object's "toUpperCase()", but after the assignment the object now longer has
that property either??


The Array object does not contain the .toUpperCase() method.

In line two, you created a two-dimensional array when you
assigned new Array( 'test-value') to GridArrayName1[0]. You
attempted to use the .toUpperCase() method on this Array object.
You need to take this second dimension array into account..

var GridArrayName1 = new Array();
GridArrayName1[0] = new Array( "test-value");
GridArrayName1[0][0] = GridArrayName1[0][0].toUpperCase();

Peace, Vm
Yaz

Providing complicated solutions to simple problems since 1997.
Jul 20 '05 #2

P: n/a
Lee
Mike S. Nowostawsky said:

I tried using the "toUpperCase()" property to change the value of an array
entity to uppercase BUT it tells me that the property is invalid. It seems
that an array is not considered an object when it is assigned a text
literal?? HOW can I change the array value to upper case then? What other
method exists for arrays?

Ex:
var GridArrayName1 = new Array();
GridArrayName1[0] = new Array ('test-value');
GridArrayName1[0] = GridArrayName1[0] .toUpperCase();

The above won't work. I even tried assigning it to an object then using the
object's "toUpperCase()", but after the assignment the object now longer has
that property either??


You seem to be confused about the difference between an Array and
an element of an Array. You can't assign a text literal to an Array.
You assign values to array elements. Array elements can be any type.

Your second assignment creates a new Array containing one string
element and makes that array the first element of GridArrayName1.
You would access that string element as GridArrayName1[0][0].

If you want to assign the string literal value to the first
element of GridArrayName1, you should use:
GridArrayName1[0] = "test-value";

Jul 20 '05 #3

P: n/a
JRS: In article <XL******************@news20.bellglobal.com>, seen in
news:comp.lang.javascript, Mike S. Nowostawsky <mi******@sympatico.ca>
posted at Sun, 28 Dec 2003 15:08:45 :-
I tried using the "toUpperCase()" property to change the value of an array
entity to uppercase BUT it tells me that the property is invalid. It seems
that an array is not considered an object when it is assigned a text
literal?? HOW can I change the array value to upper case then? What other
method exists for arrays?

Ex:
var GridArrayName1 = new Array();
GridArrayName1[0] = new Array ('test-value');
GridArrayName1[0] = GridArrayName1[0] .toUpperCase();

The above won't work. I even tried assigning it to an object then using the
object's "toUpperCase()", but after the assignment the object now longer has
that property either??

By using the second new Array, you put an Array in the first Array. It
is then GridArrayName1[0][0] that holds 'test-value', as shown by

var GridArrayName1 = new Array();
GridArrayName1[0] = new Array ('test-value');
GridArrayName1[0] = GridArrayName1[0][0] .toUpperCase();

But what you should be writing is

var GridArrayName1 = new Array();
GridArrayName1[0] = 'test-value'
GridArrayName1[0] = GridArrayName1[0].toUpperCase();

--
John Stockton, Surrey, UK. ?@merlyn.demon.co.uk Turnpike v4.00 IE 4
<URL:http://jibbering.com/faq/> Jim Ley's FAQ for news:comp.lang.javascript
<URL:http://www.merlyn.demon.co.uk/js-index.htm> jscr maths, dates, sources.
<URL:http://www.merlyn.demon.co.uk/> TP/BP/Delphi/jscr/&c, FAQ items, links.
Jul 20 '05 #4

P: n/a
Thanks very much all 3 of you for that explanation. I now understand what
the problem was. I'm used to creating multiple dimensional arrays in a
different fashion. In this case I only want a single dimension, so your
suggestion of "GridArrayName1[0] = 'test-value';" does the trick. See what
happens when you try to modify other peoples' code without actually knowing
their initial intentions! <chuckle>

Thx again!

--
=================================================
Mike S. Nowostawsky:
Email: mi******@sympatico.ca, mi******@yahoo.ca
Home Page: http://www3.sympatico.ca/mikenowo/
Lachine (Montreal), Quebec, Canada
"Mike S. Nowostawsky" <mi******@sympatico.ca> wrote in message
news:XL******************@news20.bellglobal.com...
I tried using the "toUpperCase()" property to change the value of an array
entity to uppercase BUT it tells me that the property is invalid. It seems
that an array is not considered an object when it is assigned a text
literal?? HOW can I change the array value to upper case then? What other
method exists for arrays?

Ex:
var GridArrayName1 = new Array();
GridArrayName1[0] = new Array ('test-value');
GridArrayName1[0] = GridArrayName1[0] .toUpperCase();

The above won't work. I even tried assigning it to an object then using the object's "toUpperCase()", but after the assignment the object now longer has that property either??

'Sup?

thx,

--
=================================================
Mike S. Nowostawsky:
Email: mi******@sympatico.ca, mi******@yahoo.ca
Home Page: http://www3.sympatico.ca/mikenowo/
Lachine (Montreal), Quebec, Canada

Jul 20 '05 #5

P: n/a
Now, my last step was to read data values from a text file instead of
imbedding them in the html itself (i.e. read each line and assign it to the
next value in the array). Can this be done in javascript? I've done it with
VB and countless other languages, but don't know if javascript is that
versatile.

Thx,
--
=================================================
Mike S. Nowostawsky:
Email: mi******@sympatico.ca, mi******@yahoo.ca
Home Page: http://www3.sympatico.ca/mikenowo/
Lachine (Montreal), Quebec, Canada
"Mike S. Nowostawsky" <mi******@sympatico.ca> wrote in message
news:XL******************@news20.bellglobal.com...
I tried using the "toUpperCase()" property to change the value of an array
entity to uppercase BUT it tells me that the property is invalid. It seems
that an array is not considered an object when it is assigned a text
literal?? HOW can I change the array value to upper case then? What other
method exists for arrays?

Ex:
var GridArrayName1 = new Array();
GridArrayName1[0] = new Array ('test-value');
GridArrayName1[0] = GridArrayName1[0] .toUpperCase();

The above won't work. I even tried assigning it to an object then using the object's "toUpperCase()", but after the assignment the object now longer has that property either??

'Sup?

thx,

--
=================================================
Mike S. Nowostawsky:
Email: mi******@sympatico.ca, mi******@yahoo.ca
Home Page: http://www3.sympatico.ca/mikenowo/
Lachine (Montreal), Quebec, Canada

Jul 20 '05 #6

P: n/a
Yes, you can use server-side javascript (like ASP) to read the
textfile line by line and assign the cintent to your array.
But this is server-side only.
Do you have access?

Kien
"Mike S. Nowostawsky" <mi******@sympatico.ca> wrote in message news:<pC*******************@news20.bellglobal.com> ...
Now, my last step was to read data values from a text file instead of
imbedding them in the html itself (i.e. read each line and assign it to the
next value in the array). Can this be done in javascript? I've done it with
VB and countless other languages, but don't know if javascript is that
versatile.

Thx,
--

Jul 20 '05 #7

P: n/a
Mike S. Nowostawsky wrote:
I tried using the "toUpperCase()" property to change the value of an array
entity to uppercase BUT it tells me that the property is invalid. It seems
that an array is not considered an object when it is assigned a text
literal??
An array cannot be assigned a "text literal" (better: string literal)[1]
for it has no real value.[2] What you have done by using the
Array(...) constructor is assigning a value to an *element* of the array
(the first one, to be precise). A special context is required to
convert the array's "value" (see above) to a String object. Such
contexts are for example the alert(...) method call or the (String)
concatenation operation with "+". But note that the toString() method
is implemented different in different hosts, so do not count on that it
returns a comma-separated list of the elements' values or so.
OW can I change the array value to upper case then?
Again, an array (here: Array object) does not have a value (at least
none that you can actually *write* to). I presume you meant: How can
I change the string value of all array elements to uppercase?

One is to convert the Array object to a String object (e.g. using
the Array.join(...) method), uppercase that String (e.g. using its
toUpperCase(...) method) and split it into array elements again
(e.g. using its split(...) method). Another is to iterate the array
elements and uppercase each element. While the former is presumably
faster, the latter is more reliable as it does not split substrings
separated by delimiters in element values to different array elements.
What other method exists for arrays?
RTFM:

http://devedge.netscape.com/library/...nce/array.html
Ex:
var GridArrayName1 = new Array();
GridArrayName1[0] = new Array ('test-value');
GridArrayName1[0] = GridArrayName1[0] .toUpperCase();

The above won't work.
BAD. Borken as designed. Maybe you did not want a
*two-dimensional* array (because that is what you did)
but only

var GridArrayName1 = new Array();
GridArrayName1[0] = 'test-value';
GridArrayName1[0] = GridArrayName1[0].toUpperCase();

which could be shortened to either

var GridArrayName1 = new Array('test-value');
GridArrayName1[0] = GridArrayName1[0].toUpperCase();

as well as to

var GridArrayName1 = ['test-value'];
GridArrayName1[0] = GridArrayName1[0].toUpperCase();

or

var GridArrayName1 = new Array();
GridArrayName1[0] = 'test-value'.toUpperCase();

as well as to

var GridArrayName1 = [];
GridArrayName1[0] = 'test-value'.toUpperCase();
I even tried assigning it to an object then using the
object's "toUpperCase()", but after the assignment the
object now longer has that property either??
toUpperCase() is a native method of
String objects, not of Array objects.

However, if you need it, you can add a method
with that identifier to the Array prototype:

function array_toUpperCase(/** @optional Array */ a)
/**
* Takes input array <code>a</code> or the Array object
* it is applied to as method and returns a new Array
* object with all elements in uppercase. Elements that
* were previously not string values are automagically
* converted to String.
*
* @author
* (C) 2004 Thomas Lahn &lt;ar******@PointedEars.de&gt;
* @partof
* http://pointedears.de.vu/scripts/array.js
* @requires
* types#isArray()
* @param a
* Array which elements should be converted.
* Is used instead of the Array object the
* function is applied to.
* @returns
* A copy of <code>a</code> or the Array object with its
* elements' value in uppercase. If <code>a</code> has no
* elements, an empty array is returned.
* @see
* http://pointedears.de.vu/scripts/JSDoc/
*/
{
if (!a && isArray(this))
{
a = this;
}

if (isArray(a))
{
for (var i = 0; i < a.length; i++)
{
a[i] = String(a[i]).toUpperCase();
}
return a;
}
else
{
return new Array();
}
}
Array.prototype.toUpperCase = array_toUpperCase;
'Sup?


?
PointedEars
___________
[1] A *reference* to an Array object can of course be assigned a String
literal, but then it will not reference that Array object anymore.

[2] What its valueOf(...) method yields is only the result of its
toString(...) method. When assigning another value, including
another Array object/literal to its reference, the previous Array
object is preserved (until it is garbage-collected) but becomes
unavailable if there is no other reference to it.
Jul 20 '05 #8

P: n/a
Mike S. Nowostawsky wrote:
I tried using the "toUpperCase()" property to change the value of an array
entity to uppercase BUT it tells me that the property is invalid. It seems
that an array is not considered an object when it is assigned a text
literal??
An array cannot be assigned a "text literal" (better: string literal)[1]
for it has no real value.[2] What you have done by using the
Array(...) constructor is assigning a value to an *element* of the array
(the first one, to be precise). A special context is required to
convert the array's "value" (see above) to a String object. Such
contexts are for example the alert(...) method call or the (String)
concatenation operation with "+". But note that the toString() method
is implemented different in different hosts, so do not count on that it
returns a comma-separated list of the elements' values or so.
OW can I change the array value to upper case then?
Again, an array (here: Array object) does not have a value (at least
none that you can actually *write* to). I presume you meant: How can
I change the string value of all array elements to uppercase?

One is to convert the Array object to a String object (e.g. using
the Array.join(...) method), uppercase that String (e.g. using its
toUpperCase(...) method) and split it into array elements again
(e.g. using its split(...) method). Another is to iterate the array
elements and uppercase each element. While the former is presumably
faster, the latter is more reliable as it does not split substrings
separated by delimiters in element values to separate array elements.
What other method exists for arrays?
RTFM:

http://devedge.netscape.com/library/...nce/array.html
Ex:
var GridArrayName1 = new Array();
GridArrayName1[0] = new Array ('test-value');
GridArrayName1[0] = GridArrayName1[0] .toUpperCase();

The above won't work.
BAD. Borken as designed. Maybe you did not want a
*two-dimensional* array (because that is what you did)
but only

var GridArrayName1 = new Array();
GridArrayName1[0] = 'test-value';
GridArrayName1[0] = GridArrayName1[0].toUpperCase();

which could be shortened to either

var GridArrayName1 = new Array('test-value');
GridArrayName1[0] = GridArrayName1[0].toUpperCase();

as well as to

var GridArrayName1 = ['test-value'];
GridArrayName1[0] = GridArrayName1[0].toUpperCase();

or

var GridArrayName1 = new Array();
GridArrayName1[0] = 'test-value'.toUpperCase();

as well as to

var GridArrayName1 = [];
GridArrayName1[0] = 'test-value'.toUpperCase();
I even tried assigning it to an object then using the
object's "toUpperCase()", but after the assignment the
object now longer has that property either??
toUpperCase() is a native method of
String objects, not of Array objects.

However, if you require it, you could add a method with that identifier
to the Array prototype:

function array_toUpperCase(/** @optional Array */ a)
/**
* Takes input array <code>a</code> or the Array object
* it is applied to as method and returns a new Array
* object with all elements in uppercase. Elements that
* were previously no string values are automagically
* converted to String.
*
* @author
* (C) 2004 Thomas Lahn &lt;ar******@PointedEars.de&gt;
* @partof
* http://pointedears.de.vu/scripts/array.js
* @requires
* types#isArray()
* @param a
* Array which elements should be converted.
* Is used instead of the Array object the
* function is applied to.
* @returns
* A copy of <code>a</code> or the Array object with its
* elements' value in uppercase. If <code>a</code> has no
* elements, an empty array is returned.
*/
{
if (!a && isArray(this))
{
a = this;
}

if (isArray(a))
{
for (var i = 0; i < a.length; i++)
{
a[i] = String(a[i]).toUpperCase();
}
return a;
}
else
{
return new Array();
}
}
Array.prototype.toUpperCase = array_toUpperCase;
'Sup?


?
PointedEars
___________
[1] A *reference* to an Array object can of course be assigned a String
literal, but then it will not reference that Array object anymore.

[2] What its valueOf(...) method yields is only the result of its
toString(...) method. When assigning another value, including
another Array object/literal to its reference, the previous Array
object is preserved (until it is garbage-collected) but becomes
unavailable.
Jul 20 '05 #9

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