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Questions tagged [character-replacement]

72 questions
754
votes
30 answers

How do I replace a character at a particular index in JavaScript?

I have a string, let's say Hello world and I need to replace the char at index 3. How can I replace a char by specifying a index? var str = "hello world"; I need something like str.replaceAt(0,"h");
Santhosh
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Replace multiple strings in one gsub() or chartr() statement in R?

I have a string variable containing alphabet[a-z], space[ ], and apostrophe['],eg. x <- "a'b c" I want to replace apostrophe['] with blank[], and replace space[ ] with underscore[_]. x <- gsub("'", "", x) x <- gsub(" ", "_", x) It works absolutely,…
Eric Chang
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5 answers

Character replacement in strings in VB.NET

How fast can I replace characters in a string? So the background on this question is this: We have a couple of applications that communicate with each other and with clients' applications through sockets. These socket messages contain non-printable…
Tim
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6
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3 answers

How to do Byte Pair Encoding bigram counting and replacements efficiently in Python?

In the Byte Pair Encoding algorithm, there's a replacement step where it changes the character strings delimited by spaces to bigrams. I.e., given a list of str tuples as such: [('t', 'h', 'i', 's', '\ue000'), ('c', 'o', 'r', 'p', 'u', 's',…
alvas
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3 answers

How to replace particular character in string with tcl script?

set some_string "Name/is/ComplexSTRUCTUre" convert this string to, some_string = "Name/is/ComplexSTR.CTUre" i.e replacing first "U" to "."
Harshad_Dinfi
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6
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4 answers

Show comma in CSV without using the comma character

I have a log in CSV format we write out for a certain logging operation. However, one of the fields allows user input and I need to make sure that if they enter a comma in the field that we parse it out and replace it with something that, say, Excel…
codewario
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4
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2 answers

Pythonic way to replace chars

I want to replace some characters in a string using a pythonic approach. A -> T C -> G G -> C T -> A Example: AAATCGATTGAT will transform into TTTAGCTAACTA What I did: def swap(string): string = re.sub('A', 'aux', string) string =…
lmalmeida
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4
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2 answers

Powershell, replace DOT with SPACE

This works: $string = "This string, has a, lot, of commas in, it." $string -replace ',','' Output: This string has a lot of commas in it. But this doesn't work: $string = "This string. has a. lot. of dots in. it." $string -replace…
user6496229
4
votes
7 answers

Converting space to "+" using C#

I want to convert a string to an url and, instead of a space, it needs a "+" between the keywords. For instance: "Hello I am" to: "Hello+I+am" How should i do this?
klopske
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3
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2 answers

Can quantifiers be used in regex replacement in R?

My objective would be replacing a string by a symbol repeated as many characters as have the string, in a way as one can replace letters to capital letters with \\U\\1, if my pattern was "...(*)..." my replacement for what is captured by (*) would…
iago
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Using mgsub function with word boundaries for replacement values

I am trying to replace substrings of string elements within a vector with blank spaces. Below are the vectors we are considering: test <- c("PALMA DE MALLORCA", "THE RICH AND THE POOR", "A CAMEL IN THE DESERT", "SANTANDER SL", "LA") lista <-…
MN Beitelmal
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2
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3 answers

Replacing numerical values in a FASTA file with their index in a different file. (Bash preferred)

I have a folder full of fasta files with the following format (and so on), where the line beginning with > is the read name of DNA sequence, and the following line is the sequence itself. This pattern repeats for the entire file: >…
jelfman
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3 answers

What is an easier way to replace multiple characters with other characters in a string in swift?

I am currently trying to setup a string to be added to a HTTP POST request where a user would type text and tap 'enter' and a request would be sent. I know multiple characters (^,+,<,>) can be replaced with a single character ('_') like…
MrPickles2009
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1 answer

Visual Studio 2008: String Literals "??-", "??'", "??=" corrupt

Recently I came across a bug in Visual Studio 2008 (at least I think it is one). When I try to create string-literals with two questionmarks followed by another character, something weird occurs: Those three chars are replaced by another…
jaap-de-boer
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tr output to new lines

I am trying to remove all non-alphanumeric from a text file with the following command: cat textfile.txt | tr -cd [:alnum:] > textfile_alnum.txt This works, except that now the output within textfile_alnum.txt is all on the same line. How can I…
Alkthree
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