Questions tagged [single-quotes]

Questions related to the use of single-quotes in different programming languages.

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1378 votes
15 answers
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How do I escape a single quote in SQL Server?

I am trying to insert some text data into a table in SQL Server 9. The text includes a single quote '. How do I escape that? I tried using two single quotes, but it threw me some errors. eg. insert ...
tim_wonil's user avatar
  • 15.4k
904 votes
7 answers
436k views

What are the differences between single and double quotes in Bash?

In Bash, what are the differences between single quotes ('') and double quotes ("")?
jrdioko's user avatar
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447 votes
12 answers
438k views

Usage of the backtick character (`) in JavaScript

In JavaScript, a backtick† seems to work the same as a single quote. For instance, I can use a backtick to define a string like this: var s = `abc`; Is there a way in which the behavior of ...
vancewang's user avatar
  • 5,230
241 votes
8 answers
196k views

Escape single quote character for use in an SQLite query

I wrote the database schema (only one table so far), and the INSERT statements for that table in one file. Then I created the database as follows: $ sqlite3 newdatabase.db SQLite version 3.4.0 Enter &...
jpm's user avatar
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220 votes
7 answers
87k views

Double vs single quotes

Is there a specific time when I should use "" vs ''? I've been using single quotes most of the time because it's easier to type but I'm not sure if I should. e.g. get 'user/new' vs. get &...
imjp's user avatar
  • 6,625
104 votes
3 answers
32k views

How does the leading dollar sign affect single quotes in Bash?

I need to pass a string to a program as its argument from the Bash CLI, e.g program "don't do this" The string may include any character like '$', '\', etc. and I don't want Bash to do any ...
user1206899's user avatar
  • 1,770
46 votes
3 answers
26k views

Are double "" and single '' quotes (always) interchangeable in R?

This is perhaps rather a minor question... but just a moment ago I was looking through some code I had written and noticed that I tend to just use ="something" and ='something_else' completely ...
Stephen Henderson's user avatar
35 votes
7 answers
255k views

How to Insert Double or Single Quotes

I have a long list of names that I need to have quotes around (it can be double or single quotes) and I have about 8,000 of them. I have them in Excel without any quotes and I can copy all of the ...
three3's user avatar
  • 2,816
20 votes
1 answer
16k views

Single quote in JSON field POSTGRESQL

I am trying to manipulate a JSON with a single quote inside, and I am having some troubles: 1.- When I have a function, I cant pass as parameter a JSON string with a single quote inside: This is the ...
Za7pi's user avatar
  • 1,378
19 votes
1 answer
4k views

Should I use single or double quotes in my .vimrc file?

What’s the difference between single (') and double (") quotes in Vim? Does it make speed differences? Is it better to use one or another when running functions inside it? Does it matter at all? I’m ...
greduan's user avatar
  • 4,860
15 votes
1 answer
3k views

Stopping Pandoc from escaping single quotes when converting from HTML to Markdown

If I convert a single quote ' from HTML to Markdown, it is automatically escaped: % echo "'" | pandoc -f html -t markdown \' I'd like it to output without the slash, as it makes text with ...
kdannyob's user avatar
  • 192
13 votes
4 answers
16k views

How can I accommodate a string with both single and double quotes inside of it in JavaScript

I have an application, and it is fed some HTML. It then needs to put that HTML into a string. This HTML contains single and double quotes. Is it possible, in javascript, to declare a string with ...
swickblade's user avatar
  • 4,556
11 votes
6 answers
25k views

Add single quotes to a string

I try to add single quotes to a string but don't see how to do it. For instance I would like to replace ABC by 'ABC'. I have played with paste, cat, print but don't see how to do it. Any solution? ...
VincentH's user avatar
  • 1,009
11 votes
6 answers
48k views

Escaping single quotes in REDSHIFT SQL

I've lots of string values containing single quotes which I need to insert to a column in REDSHIFT table. I used both /' and '' to escape the single quote in INSERT statement. e.g. INSERT INTO ...
stack_pointer is EXTINCT's user avatar
11 votes
5 answers
42k views

Python how convert single quotes to double quotes to format as json string [duplicate]

I have a file where on each line I have text like this (representing cast of a film): [{'cast_id': 23, 'character': "Roger 'Verbal' Kint", 'credit_id': '52fe4260c3a36847f8019af7', 'gender': 2, 'id': ...
revy's user avatar
  • 4,371
7 votes
3 answers
3k views

RubyMine: key press to "convert to single quoted"?

Is there a keyboard shortcut to toggle between single quotes and double quotes in a Ruby code? Or a key I can set up to accept the Inspection Hint? Thanks, M.
Martin Cleaver's user avatar
7 votes
4 answers
10k views

Vue: Failed to compile (Strings must use singlequote)

I've been working with Visual Studio Code for two days now. I try to build a Vue-Application. But always when I run the application by npm run serve, I get the following errors: 9:9 error ...
STh's user avatar
  • 806
7 votes
3 answers
48k views

Adding single quotes to a cell using VBA

I am trying to add single quotes to values in a column by using Chr(39), but I am only getting the second quote. e.g. I want 'value' but I am getting value' But if I use double quotes by using Chr(34) ...
Kiranshell's user avatar
7 votes
1 answer
819 views

Ruby on Rails, convert projectwide single quotes to double quotes

I wonder if anyone has come up with a shortcut to correctly convert ALL single quotes to double quotes in a new rails project. Thank you in advance. I would do that at the end of generating new ...
webgen's user avatar
  • 183
6 votes
1 answer
3k views

Don't escape single quotes with System.Text.Json

I would like .net core System.Text.Json to ignore the single quote character when escaping characters for serialization but I just can't get it to work: var encoderSettings = new TextEncoderSettings();...
steb's user avatar
  • 478
6 votes
1 answer
4k views

Spring message tag has troubles with the single quote character

I have 3 properties defined in my resource bundle: test.key1 = Just a normal snippet. test.key2 = snippet with {0} arguments {1}. test.key3 = snippet with 'charac'ter'. test.key4 = snippet with {0} ...
user1884155's user avatar
  • 3,716
6 votes
2 answers
232 views

Performance: " or ' PHP [duplicate]

I'm working on a big project in php and I need to make sure it's all fast. So I'm wondering: what is faster to use, " or ' ? (Eg: $_SESSION['example'] or $_SESSION["example"])
Marnix Bouhuis's user avatar
6 votes
1 answer
4k views

Autochange Setting Double Quotes to Single Quotes in VSCode

i explored all over the topics and found out there is no answer for this question, everyone is using search and replace, that's not the point. we have to set the default value for attributes when ...
Korosh Kiani's user avatar
6 votes
1 answer
3k views

In R, why do style guides recommend that one only use double quotes?

The lintr package has a check for single-quoted strings, and single quotes are discouraged elsewhere (e.g. ?Quotes). Single and double quoted strings work identically in R, so is there a reason why ...
user avatar
5 votes
5 answers
2k views

Why does single quote in Lisp always return upper case?

I'd like to be able to set case from a single quote, but that does not seem possible. (format nil "The value is: ~a" 'foo) "The value is: FOO" (format nil "The value is: ~a" 'FOO) "The value is: FOO"...
Jiminion's user avatar
  • 5,140
5 votes
1 answer
510 views

Single quotes in a variable name in Perl?

I was writing some Perl code in vim and accidentally typed a single quote character in a variable name and noticed that it highlighted it in a different color than normal single quoted strings. I ...
tjwrona's user avatar
  • 8,804
5 votes
0 answers
1k views

How to ignore quotes from being formatted by Prettier

I have a code base with both single and double quotes all over the place. When I format my TS files all the single quotes are being converted to double quotes. I want prettier to ignore considering ...
Hariharan D's user avatar
4 votes
4 answers
532 views

The difference between " and ' in Perl

According to this comment: You also should not use single quotes in print ">>${ '_<$filename' }<<\n". Instead try: print ">>${ \"_<$filename\" }<<\n" I always ...
Eugen Konkov's user avatar
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4 votes
3 answers
5k views

Python Replace Single Quotes Except Apostrophes

I am performing the following operations on lists of words. I read lines in from a Project Gutenberg text file, split each line on spaces, perform general punctuation substitution, and then print each ...
mas's user avatar
  • 1,175
4 votes
3 answers
2k views

How to select an element that contains quote marks?

How can I use querySelector or any other Javascript selector when the element's attribute contains quote marks " ? For example, if I search for an img element that has a src of http://www.example.com/...
max's user avatar
  • 147
4 votes
3 answers
2k views

wrapping commands through ssh: how to manage complex quotes?

I use an HPC cluster. The compute nodes can't have access to internet, only the frontal. So I want to wrap all the commands that need to access internet in order to execute them on the frontal. ex: ...
DuGNu's user avatar
  • 81
4 votes
1 answer
3k views

powershell: newline in a single-quoted string?

In powershell, double-quotes " indicate an "expandable" string, akin to "string interpolation" in other contexts. Single-quotes ' are strings which do not undergo ...
orion elenzil's user avatar
4 votes
1 answer
5k views

PHP: Convert single-quoted string into double-quoted

I need to convert string with unicode \xCODEs into regular string. The issue is that string which I have as input seems to be single-quoted. Is there any way to convert single-quoted string into ...
Denis O.'s user avatar
  • 1,851
4 votes
1 answer
20k views

Ansible escaping double quotes and single quotes

I would like insert a nrpe command in the nrpe.cfg with this ansible command check_tomcat_threads.pl -H localhost -p 30011 -C '"http-bio-30011"' -w 200 -c 50 But the the problem are the '" and "' ...
Georg Gutsche's user avatar
4 votes
2 answers
938 views

Bash script with a command with lots of single and double quotes

I need to use the curl command: curl -d '{ "auth_token": "YOUR_AUTH_TOKEN", "text": "Hey, Look what I can do!" }' \http://localhost:3030/widgets/welcome in a bash script but instead of "Hey, Look ...
Cem Türkeş's user avatar
3 votes
4 answers
9k views

Making a new line with single quotes?

Can I do a line break like this '\n'? Or do I must use double quotes - "\n"?
Run's user avatar
  • 56.1k
3 votes
5 answers
3k views

Unable to replace string in Swift

Trying to escape few special characters of string for sending it via xml api. Tried below code but not working for all the occurrences of Single Quote (') and Double Quote (") var strToReturn = "“...
Dhaval H. Nena's user avatar
3 votes
1 answer
1k views

C - single quotes vs double quotes

I'm curious about this code: int a = 'ftyp'; // a == 1718909296 int b = *((int*)"ftyp"); // b == 1887007846 My question: Why a != b ?
codeDom's user avatar
  • 1,585
3 votes
2 answers
2k views

Powershell variable expansion in single quoted string

I need to build a JSON variable that contains another JSON formatted content which should be formatted as a string. I'm putting the inner JSON into single quote so it wont get parsed along with the ...
Royce's user avatar
  • 565
3 votes
3 answers
284 views

Negate Single Quote In Character Class

I have the following code where I am trying to replace assign with always @(*) using SED. Essentially I am trying to ignore the ' in character class but SED still seems to match it. I don't want sed ...
Dheeraj Turaga's user avatar
3 votes
2 answers
328 views

Coping with apostrophe (single quote) in username with powershell command - Get-Azureaduser

I'm cycling through a list of users and need to call get-azureaduser with each one. The email address is stored in a variable $email and my command looks like this: $user = Get-AzureAdUser -filter &...
Andy Lawrence's user avatar
3 votes
2 answers
488 views

Printing in both double and single quotes

I am on exercise 8 of Learning Python the Hard Way, and I don't understand why certain lines in a print function are printed in single or double quotes. The program reads as follows: formatter = "%r ...
InvalidObjects's user avatar
3 votes
2 answers
4k views

ColdFusion single quote issue with SQL Query

In my ColdFusion 11 app, with SQL Server 2008-R2, I've following cfquery tag inside a CF Component: <cfquery name="result_set" dataSource="#request.dsn_name#"> select ...
nam's user avatar
  • 23k
2 votes
2 answers
377 views

Why does q/\\a/ equal q/\a/?

The following example prints "SAME": if (q/\\a/ eq q/\a/) { print "SAME\n"; } else { print "DIFFERENT\n"; } I understand this is consistent with the documentation. But I think this behavior ...
Ltf4an's user avatar
  • 817
2 votes
4 answers
656 views

Parse variables out of a "key1='val1' key2='val2'" string in bash without eval

I have one project specific command which produces output in the below form: Parameter1='value1' Parameter2='Value2' ... #Single quoted value for the variable. But I wanted to explicitly assign the ...
renga_in_stack's user avatar
2 votes
4 answers
2k views

In R, print vector in single quotes and comma separated

Problem Statement: I'm creating a dynamic application in which user select inputs and they are passed into URL to filter data. User can select single or multiple values. I'm using knitr::combine_words(...
am3010's user avatar
  • 67
2 votes
3 answers
1k views

Is it possible to replace these single quotes with double quotes?

I'm having some trouble trying to replace the single quotes ('...') with double quotes("...") in the following piece of code: <img id="image" src="images/bird.jpg" onmouseover="PlaySound('mySound'...
Des's user avatar
  • 33
2 votes
3 answers
3k views

Python regex to match quoted string with escaped single quotes

I was using this pattern to match single quoted strings in parser: "'.+?'" But I need regex that can find single quoted string with postgres like escape of single qoutes (doubling single qoutes). ...
jurkij's user avatar
  • 155
2 votes
2 answers
1k views

Why are single quotes more commonly used in JS files in the last couple of years? [closed]

Why is there a trend for people to use single quotes ' around string instead of double quotes " when writing javascript? Are there any minifcation or linting tools that follow the java / c / c++ ...
Eric's user avatar
  • 6,481
2 votes
2 answers
179 views

quotes in bash when submitting r cmd batch commands

Problems with single quotes in a bash script I have seen this post but my problem is more complicated and simply replacing single quotes with double quotes won't work. I need to run a R CMD BATCH ...
gipelttil's user avatar

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