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Questions - match

rust str slice from string

"A slice is a kind of reference, so it does not have ownership." The following code is simplified. It needs to return a slice using a match. All but one match arm return a string slice. On...
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A Boston

string

rust

match

slice

Votes: 0

Answers: 3

Latest Answer

You can't return a reference to a locally allocated String because the string is dropped when the function returns. There's no way to finagle your way around that. A &str is simply a bad match for...
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John Kugelman

re.match function doesn't detect line in file

I wanted to detect in which line, the section '' is. I used python to it. I used re.match(), but it does not detect that obvious line: import re filereader = open("template.html", "r&qu...
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Eqsz

python

file

match

python-re

Votes: 0

Answers: 1

Latest Answer

As you can see in this example: https://regex101.com/r/6JcYhk/1, your regex does not work in matching text with <body onload="init(0,0);">. This is because ( and ) are interpreted as t...
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Tom Aarsen

R match function with conditions

I have a dataframe (Df1) that needs to be updated with a 2nd dataframe (Df2). If the "Bird.ID" is found in Df2, then the column "Status" takes the "Alive" status in Df1 (...
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Andre230

r

conditional-statements

match

Votes: 0

Answers: 2

Latest Answer

Well, it is easier to help if you share a small but reproducible example of your data. I created a sample dataset to demonstrate the solution. Here's the data first. Df1 <- data.frame(ID = 1:5, ...
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Ronak Shah

Finding if a string start with 0 or more spaces followed by a string that might contain metacharacters

I need to find if a string start with 0 or more spaces followed by a comment string I don't know in advance, so I though of just constructing the pattern: local pattern = "^(%s" .. comment_s...
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Ludo

lua

match

metacharacters

Votes: 0

Answers: 1

Latest Answer

local str = "--test" local pattern = "^%-%-%s*(.*)$" local _, _, contents = str:find(pattern) print(contents)
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noobyy

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