25 questions from the last 30 days
-9
votes
1
answer
71
views
What are the different ways to reverse a string in Python? [duplicate]
I am learning Python and want to reverse a string.
Example:
Input: hello
Output: olleh
I know slicing works (s[::-1]) but I want to know if there are other Pythonic or recommended ways to do it. Is ...
1
vote
1
answer
51
views
Change micropython unicode notation from \xb0 to \u00b0 in string
I am using Micropython on the ESP32.
I have the following string, which includes the unicode character \xb0.
a = 'abc\xb0def'
First, I will need to change the notation to the \U00XX form, second I ...
- 444
-4
votes
0
answers
53
views
Why does Python treat two identical string literals differently when modified inside a loop? [duplicate]
was experimenting with string handling and noticed something confusing.
In the following code, two identical string literals behave differently depending on where they are used:
s1 = "harsh"
...
0
votes
1
answer
99
views
How to create 2 new columns in R (date difference + convert Seasons to minutes)? [duplicate]
I am new to R and trying to create two new variables from my dataset.
My data frame is called netflix and it contains these relevant columns:
date_added and duration
Example values:
date_added: "...
Best practices
2
votes
8
replies
186
views
What is the optimal way to define a global constant string in C++20?
I need to define several constant strings that will be used across an entire C++20 project.
I am considering the following options :
constexpr char[] str1 = "foo";
constexpr std::string str2 ...
- 633
3
votes
2
answers
83
views
How do these 2 string buffers interact? Why does the internal logger buffer append to the buffer i dynamically allocate in main
So, for context, I have started writing a small HTTP-Server for learning purposes.
Currently, I have 2 modules: server and logger. The server module uses the logger I wrote internally for logging ...
- 51
Advice
0
votes
2
replies
60
views
slicing html text based on length of plain text
I have a problem where I need to cut off text based on a max length. But the inputted string could be html a la <p>hello</p>. the html tags do not count towards the max length.
for example ...
- 31
2
votes
1
answer
56
views
backslash count in raw string interpolation in scala
I am using Scala 3.3.7.
When I do
val str1 = raw"\\\" // compile error: unclosed string literal
It is considering the \" as a single character.
But when I do
val str1 = raw"\\\\&...
- 346
Best practices
0
votes
2
replies
118
views
What is standard practice for handling VBA fixed-length string data in binary files?
I'm quite frustrated trying to write to a binary file in Excel VBA. The issue is with fixed-length string data in a Type structure. (Note that my binary file requirements are that fixed-length string ...
- 153
1
vote
1
answer
109
views
Pandas converts Excel strings like ‘2004E205’ to scientific notation — how to prevent this
How can I handle string values that contain patterns like xxxE205 (e.g., 2004E205), which are used as unique codes in my company? I explicitly read the column as a string in pandas, but values ...
- 11
-1
votes
0
answers
37
views
How to handle non-numeric input when using scanner.nextInt() in Java [duplicate]
I’m learning Java and testing basic input handling.
I wrote the following simple program:
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner ...
2
votes
3
answers
238
views
Why is a custom specialization of std::hash<std::string> allowed?
I implemented std::hash<std::string> in the usual way, by specializing the std::hash template. But then I realized that these should already be provided by the <string> header (https://www....
- 446
-3
votes
1
answer
182
views
How to create a dictionary where the keys are the alphabet (A-Z), and values are a letter from a string in Python?
I have to create a dictionary, where the keys are letters of the alphabet, and the values are the indexed letters of a given string.
Example:
Given the string "BDFHJLCPRTXVZNYEIWGAKMUSQO" ...
- 121
Advice
0
votes
3
replies
66
views
String manipulation: extract words under brackets
I'm not yet very familiar with the patterns in Lua's string.gsub function.
If I have a string like this:
Fishing Lure(+100 Fishing Skill)(1 hour)
and I want extract only the string "1 hour"...
- 391
0
votes
0
answers
56
views
Issue With Jsoup Document Selector
I'm using java spring boot and jsoup and recently I upgraded jsoup version to 1.21.1.
My code creates search query and searches for it in the document
Elements targetElements = document.select(...
- 243
-2
votes
0
answers
57
views
Writing an excel file in R based on the name of a string [duplicate]
If a list of multiple dataframes (ListA), I can write an excel file doing the following: -
write_xlsx(ListA, "Results_Up_Until_20_10_25.xlsx")
The problem with this that the date will change,...
- 41
0
votes
0
answers
81
views
RRuntimeError due to variable names when specifying R-style formula for ML model in python (pymer4)
I am trying to use the pymer4 package in python for Multi-Level Models, and I have to pass an "R-style formula specifying the model". I understand that it looks like:
target ~ varA + varB
...
- 364
Advice
1
vote
7
replies
102
views
Build string from
I have array of strings
$Emails = '[email protected]','[email protected]','[email protected]'
This array can contain from 1 to unlimited numbers of elements.
And I need to build a filter string from ...
- 23
3
votes
1
answer
104
views
Why does calling ToString give different results with a Double returned by CDbl and a Double returned by Double.Parse?
Demo code:
System.Console.WriteLine($"CDbl: {(CDbl("234.56"))} {(CDbl("234.56")).GetType} {(CDbl("234.56")).ToString("0.0")}")
...
- 339
0
votes
1
answer
92
views
How to split a shell command into tokens in a quote-aware fashion? [closed]
The task
Given the following string¹
one ' two 'three four
the required function should split it in 3 tokens (one, two three, and four), in agreement with how the bash shell does:
$ function ...
- 30.3k
0
votes
1
answer
125
views
What's the idiomatic/correct way to split a string into its first word and the rest of the string? [closed]
tl;dr
Ideally, I'd want the following
"hello world" is split in "hello" and " world"
" world" is split in "" and " world"
"hello "...
- 30.3k
3
votes
1
answer
139
views
Windows USB Driver refuses to accept my manufacturer string
I am homebuilding a USB driver on STM32. I have managed to get the device to enumerate which is awesome, but only when I disable all the strings (set all ID's to 0). Right now, when I set ...
- 303
-3
votes
1
answer
119
views
How do I only accept specific string input [closed]
I want to write a code that finds the derivative to any function and want to take a user input on what type of function they're inputting is. Essentially I tried to write a while loop that only accept ...
6
votes
2
answers
185
views
If misaligned loads are supported on my platform then why does address sanitizer complain of undefined behaviour?
I'm using the Stringzilla string library, which is supposed to be close to how std::string operates. It has a flag called SZ_USE_MISALIGNED_LOADS. By default it sets it to on, and it looks like this:
/...
- 16.3k
5
votes
4
answers
349
views
How to detect use of std::string SSO (short string optimization)?
If I have a long string:
std::string data("This is a string long enough so that it is not a short string");
And then I have a view onto that string:
std::string_view dataView(std::begin(...
- 267k