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TryStrToFloat

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BubikolRamios:
Hmm, no message. Note there is nothing after '.'.
I assume it thinks strtofloat('0.') is 0. How to check then if string or decimal ?


--- Code: Pascal  [+][-]window.onload = function(){var x1 = document.getElementById("main_content_section"); if (x1) { var x = document.getElementsByClassName("geshi");for (var i = 0; i < x.length; i++) { x[i].style.maxHeight='none'; x[i].style.height = Math.min(x[i].clientHeight+15,306)+'px'; x[i].style.resize = "vertical";}};} ---var  fs: TFormatSettings;  x: Float;begin  x := NaN;  fs := FormatSettings;  fs.DecimalSeparator := '.';       if not TryStrToFloat('0.',x, fs)then  begin    showmessage('foo');  end;         

paweld:
if the TryStrToFloat function returns TRUE, it means that the string was successfully converted to a number, and if FALSE, the conversion failed.
--- Code: Pascal  [+][-]window.onload = function(){var x1 = document.getElementById("main_content_section"); if (x1) { var x = document.getElementsByClassName("geshi");for (var i = 0; i < x.length; i++) { x[i].style.maxHeight='none'; x[i].style.height = Math.min(x[i].clientHeight+15,306)+'px'; x[i].style.resize = "vertical";}};} ---var  fs: TFormatSettings;  x: Double;begin  fs.DecimalSeparator := '.';  if TryStrToFloat('0.', x, fs) then    ShowMessage('It''s float: ' + FloatToStr(x))  else    showmessage('It'' string');end;          

Thaddy:
Should it not be '0.0';?
I mean it is not called a separator for nothing: it expects two decimal values either side of the dot.

BubikolRamios:

--- Quote from: Thaddy on September 09, 2024, 06:54:07 am ---Should it not be '0.0';?
I mean it is not called a separator for nothing: it expects two decimal values either side of the dot.

--- End quote ---

Checking that OnKeyUp on TEdit control... Press backspace on something like '0.2'

BubikolRamios:
test:

--- Code: Pascal  [+][-]window.onload = function(){var x1 = document.getElementById("main_content_section"); if (x1) { var x = document.getElementsByClassName("geshi");for (var i = 0; i < x.length; i++) { x[i].style.maxHeight='none'; x[i].style.height = Math.min(x[i].clientHeight+15,306)+'px'; x[i].style.resize = "vertical";}};} ---showmessage(FloatToStr(StrToFloat('0.'))); //--> 0showmessage(FloatToStr(StrToFloat('01')));//--> 1            
Not very logical.

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