When I run the code below, it works fine. (TI nspire CAS II calculator)
However, at the end of the program I give two options, "Enter" to repeat the program, "Esc" to quit.
"Esc" works fine.
However if I pick "Enter", the RequestStr box pops up again to receive the new input as intended.
When I enter the input, the program displays "You entered nothing" and goes back to the RequestStr box again. I have to press "Cancel" on the RequestStr box to get out of the loop.
"You entered nothing" is part of the error code I am using to intercept the case where the user may click OK without entering anything into the box.
So basically the program works fine the first time I run it, it is when I choose to rerun it again is when the issue arises.
CODE
Define LibPub funvarsolv()=
Prgm
:Local y1,res,i,ab,d,c
:
:Loop
:0→c
:1→d
:While d =1
:Try
:RequestStr "enter function",y1,0,ab
:0→d
:
:Else
:© user left input box empty
:Text "you entered nothing",0
:ClrErr
:
:EndTry
:If d=0
:Exit
:EndWhile
:© user pressed cancel
: If ab=0 Then
: Disp "Press ENTER to end"
: subrtine\delay()
: DelVar y1,i,k,ab
: Return
:
:EndIf
:
:
:
: expr("Define y1(x) ="&y1)
: res:=exp▶list(solve(y1(x)=0,x),x)
:
:Disp "Solution set: "&var&" =",res
:
:subrtine\dlay()
:If k="esc" Then
:1→c
:ElseIf k="enter" Then
:0→c
:EndIf
:If c=1
:Exit
:EndLoop
:EndPrgm
Related
I have a text file that I want to open first for reading or writing, but want the user to manually enter the text_file name (which opens the file for reading) first like so:
def read_in_albums
puts "Enter file name: "
begin
file_name = gets().chomp
if (file_name == "albums.txt")
puts "File is open"
a_file = File.new("#{file_name}", "r")
puts a_file.gets
finished = true
else
puts "Please re-enter file name: "
end
end until finished
end
From this unfinished code below, selecting 1 would go to the above procedure. I want the user to select 1 first, and if they choose 2 without having gone through read_in_albums they just get some sort of message like "no file selected and sent back to menu screen.
def main()
finished = false
begin
puts("Main Menu:")
puts("1- Read in Album")
puts("2- Display Album Info")
puts("3- Play Album")
puts("4- Update Album")
puts("5- Exit")
choice = read_integer_in_range("Please enter your choice:", 1, 5)
case choice
when 1
read_in_albums
when 2
display_album_info
when 5
finished = true
end
end until finished
end
main()
The only thing I can think of is something like
when 2
if(read_in_albums == true)
display_album_info
and have it return true from read_in_albums.
which I don't want to do as it just goes through read_in_albums again, when I only want it to do that if the user pressed 1.
All of your application's functionality depends on whether the album data has been read. You are no doubt storing this data as an object in memory referenced by some variable.
$album_data = File.read 'album.txt'
You can test whether this data is present in order to determine whether the file data has been read:
if $album_data.nil?
# ask user for album file
else
# show album user interface
end
There is no need for a separate flag. The mere presence of the data in memory serves as a flag already.
You could either set a flag when option 1 was selcted
has_been_read = false
...
when 1
read_in_albums
has_been_read = true
when 2
if has_been_read
display_album_info
else
puts "Select Option 1 first"
end
Or just test if your file name is a valid string.
What I want to do is if I press the button on my mouse it uses a key like "E" and if I press the button again it uses the key "W" and after 2 seconds it resets, I mean if I don’t press the same button after 2 seconds it uses letter "e " again. Is that possible?
I've tried some codes but no results yet:
function OnEvent(event, arg, family)
if event == "MOUSE_BUTTON_PRESSED" and arg == 5 then
toggle = not toggle
if toggle then
PressKey("e")
ReleaseKey("e")
else
PressKey("w")
ReleaseKey("w")
end
end
end
local prev_tm_btn5 = -math.huge
function OnEvent(event, arg, family)
if event == "MOUSE_BUTTON_PRESSED" and arg == 5 then
local tm = GetRunningTime()
local key = tm - prev_tm_btn5 > 2000 and "e" or "w"
prev_tm_btn5 = tm
PressKey(key)
Sleep(15)
ReleaseKey(key)
end
end
I am designing a user interface for a menu project. I tried using a for-loop such as:
for i in 0..8
i=i
end
for k in 0..7
k=k
end
if #selection==i && #unlock==k && $switches[(what do I do here?)]==?????
do thing
Whenever the user presses the Y key, it will turn off a function; if #selection==1 is highlighted and the user presses the "Y" key, the corresponding switch at that specific location should be turned off. #unlock is just used as a way of saying that, unless this global boolean is set to true, the user can press "Y" and turn this switch on or off.
First thing, you could change each if else to something like this:
BITMAP_PATH = "Graphics/Pictures/Input Map/switch"
if #selection==1 && #unlock1
pbSEPlay("BW2MenuChoose",65)
bitmap_switch = $switches[310] ? 'off' : 'on' # sets path to off/on
#graphics["switch"].setBitmap(BITMAP_PATH + bitmap_switch)
!$switches[310] # it changes value of boolean to opposite value
end
And the selections that only have one condition could be written like this:
if #selection==0 && #unlock0
pbSEPlay("buzzer",65)
end
You could also try writing a case expression for #selection. Probably you could dry it even more, but I do not really understand what each #unlock is used for.
Edit:
BITMAP_PATH = "Graphics/Pictures/Input/switch"
SELECTION_SWITCHES = [nil, 310, 300, 339, 338, 330, 318]
def pbChangeSwitch
case
when 0
case #selection
when 0,7
pbSEPlay("buzzer",65) if instance_variable_get("#unlock#{#selection}")
when 1..6
if instance_variable_get("#unlock#{#selection}")
pbSEPlay("BW2MenuChoose",65)
bitmap_switch = $switches[SELECTION_SWITCHES[#selection]] ? 'off' : 'on'
#sprites["switch"].setBitmap(BITMAP_PATH + bitmap_switch)
index = SELECTION_SWITCHES[#selection]
$switches[index] = !$switches[index]
end
end
Graphics.update
Please add $ to the last line. bitmap_switch can not be true or false, because you add it to BITMAP_PATH, so it has to be 'off' or 'on'.
I have a Raspberry Pi with a Siri Proxy that is controlling my garage door, the garage door has only one command for open and close. To check if the garage door is opened to not I bought a magnet switch and I builded a flout point button. I already tried
doorstate = `gpio read 5`.chomp #gives value 1 or 0, 1 is opened, 0 is closed
print doorstate
if doorstate == "1"
print "The garage door is already opened.\n"
elsif doorstate == "0"
print "OK, I'll open it for you!\n"
else
print "Error, please open it manually.\n"
end
Can someone please tell me how I can check fi the returned value or string from doorstate = 'gpio read 5' is equal to a string?
I'm guessing here that the result of 'gpio read 5' contains a line ending.
Try chomping it off:
doorstate = `gpio read 5`.chomp
To verify the class of doorstate, insert p doorstate.class at line 2.
You need to change your single quotes (') to backticks (`, the little thing with the tilde on your keyboard). That will execute the command. The rest of your code is fine.
Please note: I am new to TDD & cucumber, so the answer may be very easy.
I am creating a basic image editor for a test (the image is just a sequence of letters).
I have written a Cucumber story:
Scenario Outline: edit commands
Given I start the editor
And a 3 x 3 image is created
When I type the command <command>
Then the image should look like <image>
The step
Scenarios: colour single pixel
| command | image |
| L 1 2 C | OOOCOOOOO |
always fails, returning
expected: "OOOCOOOOO"
got: " OOOOOOOO" (using ==) (RSpec::Expectations::ExpectationNotMetError)
This is the step code:
When /^I type the command (.*)$/ do |command|
#editor.exec_cmd(command).should be
end
The function exec_cmd in the program recognizes the command and launches the appropriate action. In this case it will launch the following
def colorize_pixel(x, y, color)
if !#image.nil?
x = x.to_i
y = y.to_i
pos = (y - 1) * #image[:columns] + x
#image[:content].insert(pos, color).slice!(pos - 1)
else
#messenger.puts "There's no image. Create one first!"
end
end
However, this always fails unless I hardcode the values of the two local variables (pos and color) in the function in the program itself.
Why? It doesn's seem I'm doing anything wrong in the program itself: the function does what it's supposed to do and those two variables are only useful locally. So I'd think this is a problem with my use of cucumber. How do I properly test this?
---edit---
def exec_cmd(cmd = nil)
if !cmd.nil?
case cmd.split.first
when "I" then create_image(cmd[1], cmd[2])
when "S" then show_image
when "C" then clear_table
when "L" then colorize_pixel(cmd[1], cmd[2], cmd[3])
else
#messenger.puts "Incorrect command. " + "Commands available: I C L V H F S X."
end
else
#messenger.puts "Please enter a command."
end
end
When /^I type the command (.*)$/ do |command|
#output = #editor.exec_cmd(command)
end
Then /^the image should look like (.)*$/ do |expected_image|
#output.should == expected_image
end
Hope this may help you.
It's not a cucumber issue.
The problem was that, in exec_cmd, split was called only in the "case" clause, not in the "when"s. This meant that, since the command's format was "a 1 2 b", cmd[1] in the "when" would call the second character of the string, a space, not the second value of the array, and the other functions would convert that to_i, returning 0.
I changed exec_cmd like this:
def exec_cmd(cmd = nil)
if !cmd.nil?
cmd = cmd.split
case cmd.first
when "I" then create_image(cmd[1], cmd[2])
[...]
end
which fixed the issue.