I hope you can help me to solve this.
I am building a Windows VCL application with C++ Builder. I have a Tedit object in which the user should type a temperature value, 25.35 for example. Before processing it, I need to check if the number is written correctly and, in particular, I need to check if the decimal separator is correct comparing it to the Windows 10 settings. In case the separator is wrong, it should be automatically set correctly and re-write the Text of the Tedit object.
I wrote this code:
char separator = std::use_facet< std::numpunct<char> >(std::cout.getloc()).decimal_point();
AnsiString str = refTemperature->Text;
if (separator == ',') {
str = StringReplace( str, ".", separator, TReplaceFlags() <<rfReplaceAll );
}
else
str = StringReplace( str, ",", separator, TReplaceFlags() <<rfReplaceAll );
refTemperature->Text = str;
Here, separator is always ".", even when my Windows Control Panel settings are Decimal symbol = ',' and Digit grouping symbol = '.'. So, in this case, the code does not work. Have got a solution? Thank you.
Related
Dears,
How to get character's equivalent from another TextInput using PySimpleGUI?
Let me explain: Suppose I have those sets of data , set A and Set B, my query is once I write one characters in TextInput 1 from Set A I'll get automatically it's equivalent in Set B;
For example Set A : A, B, C, D, ........, Z
Set B : 1, 2, 3,4, ..........,26
So if I write ABC in TextInut A --> I'll get : 123 in TextInput B
Thanks in advance
import PySimpleGUI as sg
enter image description here
My apologies if I misunderstand your question.
First, special characters, like ☯, ∫, β, etc., are just Unicode characters. You can type them directly into your editor or use the Unicode escape codes. You might see this question for more help.
Second, it is unclear when you want to make this mapping. It is easiest if you type characters and then map at the end. If you want to do interactively that is harder. You can get each individual keyboard event; see (this answer)[https://stackoverflow.com/a/74214510/1320510] for an example. Because I know of no way of the exact position, you might be better getting the events, and writing the display to a second label. I would need to more a bit more about what you are doing.
Keep hacking! Keep notes.
Charles
Set option enable_events=True to A, map each char in values[A] by dictionary {'A':'1', ...}, then update B with the result when event A.
Demo Code
import string
import PySimpleGUI as sg
table = {char:str(i+1) for i, char in enumerate(string.ascii_uppercase)}
layout = [
[sg.Input(enable_events=True, key='-IN1-')],
[sg.Input(key='-IN2-')],
]
window = sg.Window('Main Window', layout)
while True:
event, values = window.read()
if event == sg.WIN_CLOSED:
break
elif event == '-IN1-':
text1 = values['-IN1-']
text2 = ''.join([table[char] if char in string.ascii_uppercase else char for char in text1])
window['-IN2-'].update(text2)
window.close()
For different case, like table = {'a':'apple', 'b':'banana', 'c':'orange'}
import string
import PySimpleGUI as sg
table = {'a':'apple', 'b':'banana', 'c':'orange'}
layout = [
[sg.Input(enable_events=True, key='-IN1-')],
[sg.Input(key='-IN2-')],
]
window = sg.Window('Main Window', layout)
while True:
event, values = window.read()
if event == sg.WIN_CLOSED:
break
elif event == '-IN1-':
text1 = values['-IN1-']
text2 = ''.join([table[char] if char in table else char for char in text1])
window['-IN2-'].update(text2)
window.close()
I working on a language similar to ruby called gaiman and I'm using PEG.js to generate the parser.
Do you know if there is a way to implement heredocs with proper indentation?
xxx = <<<END
hello
world
END
the output should be:
"hello
world"
I need this because this code doesn't look very nice:
def foo(arg) {
if arg == "here" then
return <<<END
xxx
xxx
END
end
end
this is a function where the user wants to return:
"xxx
xxx"
I would prefer the code to look like this:
def foo(arg) {
if arg == "here" then
return <<<END
xxx
xxx
END
end
end
If I trim all the lines user will not be able to use a string with leading spaces when he wants. Does anyone know if PEG.js allows this?
I don't have any code yet for heredocs, just want to be sure if something that I want is possible.
EDIT:
So I've tried to implement heredocs and the problem is that PEG doesn't allow back-references.
heredoc = "<<<" marker:[\w]+ "\n" text:[\s\S]+ marker {
return text.join('');
}
It says that the marker is not defined. As for trimming I think I can use location() function
I don't think that's a reasonable expectation for a parser generator; few if any would be equal to the challenge.
For a start, recognising the here-string syntax is inherently context-sensitive, since the end-delimiter must be a precise copy of the delimiter provided after the <<< token. So you would need a custom lexical analyser, and that means that you need a parser generator which allows you to use a custom lexical analyser. (So a parser generator which assumes you want a scannerless parser might not be the optimal choice.)
Recognising the end of the here-string token shouldn't be too difficult, although you can't do it with a single regular expression. My approach would be to use a custom scanning function which breaks the here-string into a series of lines, concatenating them as it goes until it reaches a line containing only the end-delimiter.
Once you've recognised the text of the literal, all you need to normalise the spaces in the way you want is the column number at which the <<< starts. With that, you can trim each line in the string literal. So you only need a lexical scanner which accurately reports token position. Trimming wouldn't normally be done inside the generated lexical scanner; rather, it would be the associated semantic action. (Equally, it could be a semantic action in the grammar. But it's always going to be code that you write.)
When you trim the literal, you'll need to deal with the cases in which it is impossible, because the user has not respected the indentation requirement. And you'll need to do something with tab characters; getting those right probably means that you'll want a lexical scanner which computes visible column positions rather than character offsets.
I don't know if peg.js corresponds with those requirements, since I don't use it. (I did look at the documentation, and failed to see any indication as to how you might incorporate a custom scanner function. But that doesn't mean there isn't a way to do it.) I hope that the discussion above at least lets you check the detailed documentation for the parser generator you want to use, and otherwise find a different parser generator which will work for you in this use case.
Here is the implementation of heredocs in Peggy successor to PEG.js that is not maintained anymore. This code was based on the GitHub issue.
heredoc = "<<<" begin:marker "\n" text:($any_char+ "\n")+ _ end:marker (
&{ return begin === end; }
/ '' { error(`Expected matched marker "${begin}", but marker "${end}" was found`); }
) {
const loc = location();
const min = loc.start.column - 1;
const re = new RegExp(`\\s{${min}}`);
return text.map(line => {
return line[0].replace(re, '');
}).join('\n');
}
any_char = (!"\n" .)
marker_char = (!" " !"\n" .)
marker "Marker" = $marker_char+
_ "whitespace"
= [ \t\n\r]* { return []; }
EDIT: above didn't work with another piece of code after heredoc, here is better grammar:
{ let heredoc_begin = null; }
heredoc = "<<<" beginMarker "\n" text:content endMarker {
const loc = location();
const min = loc.start.column - 1;
const re = new RegExp(`^\\s{${min}}`, 'mg');
return {
type: 'Literal',
value: text.replace(re, '')
};
}
__ = (!"\n" !" " .)
marker 'Marker' = $__+
beginMarker = m:marker { heredoc_begin = m; }
endMarker = "\n" " "* end:marker &{ return heredoc_begin === end; }
content = $(!endMarker .)*
as a followup question to lua tables - allowed values and syntax:
I need a table that equates large numbers to strings. The catch seems to be that strings with punctuation are not allowed:
local Names = {
[7022003001] = fulsom jct, OH
[7022003002] = kennedy center, NY
}
but neither are quotes:
local Names = {
[7022003001] = "fulsom jct, OH"
[7022003002] = "kennedy center, NY"
}
I have even tried without any spaces:
local Names = {
[7022003001] = fulsomjctOH
[7022003002] = kennedycenterNY
}
When this module is loaded, wireshark complains "}" is expected to close "{" at line . How can I implement a table with a string that contains spaces and punctuation?
As per Lua Reference Manual - 3.1 - Lexical Conventions:
A short literal string can be delimited by matching single or double quotes, and can contain the (...) C-like escape sequences (...).
That means the short literal string in Lua is:
local foo = "I'm a string literal"
This matches your second example. The reason why it fails is because it lacks a separator between table members:
local Names = {
[7022003001] = "fulsom jct, OH",
[7022003002] = "kennedy center, NY"
}
You can also add a trailing separator after the last member.
The more detailed description of the table constructor can be found in 3.4.9 - Table Constructors. It could be summed up by the example provided there:
a = { [f(1)] = g; "x", "y"; x = 1, f(x), [30] = 23; 45 }
I really, really recommend using the Lua Reference Manual, it is an amazing helper.
I also highly encourage you to read some basic tutorials e.g. Learn Lua in 15 minutes. They should give you an overview of the language you are trying to use.
Trying to add special character (%) sign to variable with following concatenation sign, but it gives me the the error: Invalid characters.
DECLARE Percent CHARACTER CAST ( ' %' AS CHARACTER CCSID 1208);
SET AlocatedAmount = 45
SET InPercent = AlocatedAmount||'%'
Result should be: InPercent = 45%
Error:Invalid characters::45 %
What's going wrong here?
AlocatedAmount seems to be an INTEGER, on what you cannot use the concatenation operator.
You need to cast that to CHARACTER first:
SET InPercent = CAST(AlocatedAmount AS CHARACTER) || '%';
So there is also the option of using FORMAT in your CAST
DECLARE Num INTEGER;
DECLARE FormattedStr CHAR;
SET Num = 45;
SET FormattedStr = CAST(Num AS CHAR FORMAT '#0%');
More information can be found at https://www.ibm.com/support/knowledgecenter/en/SSMKHH_9.0.0/com.ibm.etools.mft.doc/ak05615_.htm
I'm trying to integrate with ybp.com, a vendor of proprietary software for managing book ordering workflows in large libraries. It keeps feeding me URLs that contain characters encoded with an extra "25" in them. Like this book title:
VOLATILE KNOWING%253a PARENTS%252c TEACHERS%252c AND THE CENSORED STORY OF ACCOUNTABILITY IN AMERICA%2527S PUBLIC SCHOOLS.
The encoded characters in this sample are as follows:
%253a = %3A = a colon
%252c = %2C = a comma
%2527 = %27 = an apostrophe (non-curly)
I need to convert these encodings to a format my internal apps can recognize, and the extra 25 is throwing things off kilter. The final two digits of the hex encoded characters appear to be identical to standard URL encodings, so a brute force method would be to replace "%25" with "%". But I'm leary of doing that because it would be sure to haunt me later when an actual %25 shows up for some reason.
So, what standard is this? Is there an official algorithm for converting values like this to other encodings?
%25 is actually a % character. My guess is that the external website is URLEncoding their output twice accidentally.
If that's the case, it is safe to replace %25 with % (or just URLDecode twice)
The ASCII code 37 (25 in hexadecimal) is %, so the URL encoding of % is %25.
It looks like your data got URL encoded twice: , -> %2C -> %252C
Substituting every %25 for % should not generate any problems, as an actual %25 would get encoded to %25252525.
Create a counter that increments one by one for next two characters, and if you found modulus, you go back, assign the previous counter the '%' char and proceed again. Something like this.
char *str, *newstr; // Fill up with some memory before proceeding below..
....
int k = 0, j = 0;
short modulus = 0;
char first = 0, second = 0;
short proceed = 0;
for(k=0,j=0; k<some_size; j++,k++) {
if(str[k] == '%') {
++k; first = str[k];
++k; second = str[k];
proceed = 1;
} else if(modulus == 1) {
modulus = 0;
--j; first = str[k];
++k; second = str[k];
newstr[j] = '%';
proceed = 1;
} else proceed = 0; // Do not do decoding..
if(proceed == 1) {
if(first == '2' && second == '5') {
newstr[j] = '%';
modulus = 1;
......