Re: Double value from negative to positive - C# Discussion Boards

Double value from negative to positive

15-Aug-06 11:59

Nader Elshehabi wrote:
I thought the deployment project does that for you by checking the dependencies, doesn't it?

Eh, sometimes. It can find ActiveX control dependencies, but it can't always do a proper install. Often times you'll need your installer to have the ActiveX control installer run as part of it.

Nader Elshehabi wrote:
I also thought that "Same location as my application" means the same folder. What website you mean?

Yeah, that's what I meant: either the vendor's website, or your deploy location.

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Saamir15-Aug-06 8:05

Saamir

15-Aug-06 8:05

Hi guys,
How do I change a double value from negative to positive. i.e. -3.14 to 3.14

Please help

sasa

leppie15-Aug-06 8:21

leppie

15-Aug-06 8:21

val * -1.0

xacc.ide-0.2.0.57 - now with C# 2.0 parser and seamless VS2005 solution support!

Dan Neely15-Aug-06 8:38

Dan Neely

15-Aug-06 8:38

double negativeDouble = 0 - positiveDouble;

Josh Smith15-Aug-06 8:42

15-Aug-06 8:42

Just for the sake of completeness...

double positiveValue = (double)Math.Abs( negativeValue );

:josh:
My WPF Blog[^]

Guffa15-Aug-06 8:46

Guffa

15-Aug-06 8:46

Use the negation operator (-):

double x = -3.14;<br />
x = -x;

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Saamir15-Aug-06 8:50

Saamir

15-Aug-06 8:50

Thank you guys, I went ahead using ftemp=0-ftemp;

Appreciate the response

sasa

Guffa15-Aug-06 9:19

Guffa

15-Aug-06 9:19

Actually, that should be:

ftemp = 0.0 - ftemp;

The value 0 is an integer value. You should use a double value to make sure that your value doesn't get converted to an integer before the calculation.

The zero value is superflous, though:

ftemp = -ftemp;

Smile | :)

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Josh Smith16-Aug-06 4:35

16-Aug-06 4:35

Guffa wrote:
The value 0 is an integer value. You should use a double value to make sure that your value doesn't get converted to an integer before the calculation.

Just to be pedantic, the integer value (0) would be widened to a double value (0.0), not the other way around.

:josh:
My WPF Blog[^]

Judah Gabriel Himango15-Aug-06 9:05

15-Aug-06 9:05

SASA_1 wrote:
How do I change a double value from negative to positive. i.e. -3.14 to 3.14

<sarcasm>

Convert it to a string, remove the first character, then parse the value from the string.

</sarcasm> (yes, people have done this[^])

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Dave Kreskowiak15-Aug-06 9:10

Dave Kreskowiak

15-Aug-06 9:10

You've got to be kidding me!! I find it interesting to see the miriad of solutions people come up with for such a simple problem. But DAMN, the performance and memory implications of this one, in a high-use situation, are just sickening!! Good job!! Laugh | :laugh:

Dave Kreskowiak
Microsoft MVP - Visual Basic

Judah Gabriel Himango15-Aug-06 9:15

15-Aug-06 9:15

Dave Kreskowiak wrote:
But DAMN, the performance and memory implications of this one, in a high-use situation, are just sickening!

yep. Apparently there are people with so little knowledge of math, they didn't realize a simple -1 multiplication would swap the sign.

Tech, life, family, faith: Give me a visit.
I'm currently blogging about: And in this corner, the Party of Allah
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Judah Himango

Dave Kreskowiak15-Aug-06 9:58

Dave Kreskowiak

15-Aug-06 9:58

I weep for the software of tomorrow! Cry | :((

Dave Kreskowiak
Microsoft MVP - Visual Basic

Josh Smith16-Aug-06 4:33

16-Aug-06 4:33

Dave Kreskowiak wrote:
I weep for the software of tomorrow!

I weep for the software of today (aka VS2005) Cry | :((

:josh:
My WPF Blog[^]

Dave Kreskowiak16-Aug-06 12:06

Dave Kreskowiak

16-Aug-06 12:06

Yeah, I'm feeling that pain too! I'm dying to get my hands on the SP, but causiously. It seems every other SP that comes out breaks more than it fixes...

Dave Kreskowiak
Microsoft MVP - Visual Basic

Guffa15-Aug-06 10:14

Guffa

15-Aug-06 10:14

Judah Himango wrote:
yep. Apparently there are people with so little knowledge of math, they didn't realize a simple -1 multiplication would swap the sign.

Or so little knowledge of the language that they don't realize that there is a negation operator that is specially made for just changing the sign of a number. Wink | ;)

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Re: student table drag drop

Paul Conrad15-Aug-06 11:58

Paul Conrad

15-Aug-06 11:58

Judah Himango wrote:
Convert it to a string, remove the first character, then parse the value from the string.

That's no moon, it's a space station. - Obi-wan Kenobi

student table drag drop

TAREQ F ABUZUHRI15-Aug-06 6:16

TAREQ F ABUZUHRI

15-Aug-06 6:16

i try to make program for (sheduler student table ) in univercity

student can have lecture any time from 8 am to 2 pm in all days acept sunday ...

|8-9|9-10|10-11|11-12|12-1|1-2|
----+------------------------------
mon | | | | | | |
----+------------------------------
tue | | | | | | |
----+------------------------------
wed | | | | | | |
----+------------------------------
thu | | | | | | |
----+------------------------------
fri | | | | | | |
----+------------------------------

my qastions

1- how can make this table in WinApp form
2- how can make drag and drop to Cell in ( Mon 11-12) to ( thu 10-11)
just the how make drag and drop

Palestine

Judah Gabriel Himango15-Aug-06 7:19

15-Aug-06 7:19

You can use the DataGridView[^] component to display data from a database. You can simply place the DataGridView on a Windows Form in the Visual Studio designer.

Perhaps this article[^] will help you out with dragging cells in teh DataGridView.

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Judah Himango

Depends on where you are

Ennis Ray Lynch, Jr.15-Aug-06 11:25

Ennis Ray Lynch, Jr.

15-Aug-06 11:25

I think in the States students are used to seeing

M T W R F S
8-9
9-10
10-11
11-12
...

A man said to the universe:
"Sir I exist!"
"However," replied the Universe, "The fact has not created in me A sense of obligation."

-- Stephen Crane

TreeView Quastion

ytubis15-Aug-06 6:06

ytubis

15-Aug-06 6:06

Hi!
I have a problem, if i have a treeview which is filled with allot of TreeNodes and for some reason i need to restart the treeview, can i restart it to the same visible mode that it was before, i mean if i opened node one and its chield and its chield, and now i restart it, i mean create it again can i visibly show the same childs as it was before the restart, this is of corse when the treeview does not change.
Thanks Smile | :)

Re: TreeView Quastion

Judah Gabriel Himango15-Aug-06 7:21

15-Aug-06 7:21

You can, but there's no magic way to do this. When you clsoe the TreeView, record the node hierarchy and each node's expanded state. When you want to restore your nodes, you'll have to do this manually based on the information you previously recorded.

Tech, life, family, faith: Give me a visit.
I'm currently blogging about: And in this corner, the Party of Allah
The apostle Paul, modernly speaking: Epistles of Paul

Judah Himango

Re: TreeView Quastion

Josh Smith15-Aug-06 8:39