Closed. This question is not reproducible or was caused by typos. It is not currently accepting answers.
This question was caused by a typo or a problem that can no longer be reproduced. While similar questions may be on-topic here, this one was resolved in a way less likely to help future readers.
Closed 8 years ago.
Improve this question
I tried this :
irb(main):125:0> a = "ab%c"
=> "ab%c"
irb(main):126:0> a.gsub("%", '\\')
=> "ab\\c"
irb(main):127:0>
whereas expected output is:
ab\c
it did not work.
Thanks in advance.
Update: ruby version
ruby -v
ruby 1.8.7 (2011-06-30 patchlevel 352) [x86_64-linux]
a = "ab%c"
a.gsub!("%", '\\')
#=> "ab\\c"
puts a
# ab\c
in "ab\\c" backslash \ is being escaped using character \.
you can verify this with puts
Related
Closed. This question is not reproducible or was caused by typos. It is not currently accepting answers.
This question was caused by a typo or a problem that can no longer be reproduced. While similar questions may be on-topic here, this one was resolved in a way less likely to help future readers.
Closed 2 years ago.
Improve this question
I have a file from Wild Wild Web and it contains malformed UTF8. I handled malformed UTF8 in my other codes in previous versions of Raku. In 2020.10 version, I am running into this issue below. Has the support for utf8-c8 changed (this page says it should work, but it doesn't seem to) :
https://docs.raku.org/language/unicode#index-entry-UTF-8_Clean-8
This page has this example:
say slurp($test-file, enc => 'utf8-c8');
Now my code on the command line:
raku -e 'my $a = slurp("zlist"); for $a.lines { .say }'
Malformed UTF-8 near bytes 73 e2 5f at line 55 col 14
in block <unit> at -e line 1
Then using this:
raku -e 'my $a = slurp("zlist", enc => 'utf8-c8'); for $a.lines { .say }'
===SORRY!=== Error while compiling -e
Undeclared routine:
utf8-c8 used at line 1
My code is simple and essentially copied from the example. What am I doing wrong?
Closed. This question is not reproducible or was caused by typos. It is not currently accepting answers.
This question was caused by a typo or a problem that can no longer be reproduced. While similar questions may be on-topic here, this one was resolved in a way less likely to help future readers.
Closed 4 years ago.
Improve this question
I have the following simple bash code to test string comparison:
#!/bin/sh
BRANCH="master"
echo $ref
if [[ "$ref" = "refs/heads/$BRANCH" ]]
then
echo "Matches"
else
echo "Do not match"
fi
When I ran the code using export ref=/refs/heads/master && . sample I get the following result:
/refs/heads/master
Do not match
What may be causing the problem?
What is causing the problem is the missing slash in your test: /refs/heads/master is not equal to refs/heads/master!
Closed. This question is not reproducible or was caused by typos. It is not currently accepting answers.
This question was caused by a typo or a problem that can no longer be reproduced. While similar questions may be on-topic here, this one was resolved in a way less likely to help future readers.
Closed 6 years ago.
Improve this question
I have this ruby program to parse a CSV file. I am missing a endif somewhere and I cannot figure out.
require 'csv'
prevrow=nil
newarray=Array.new
CSV.foreach("\\\\192.168.0.1\\fe18cb0618cabd41\\ninjatrader\\uniqueside.csv", col_sep: ',') do |row|
if(prevrow==nil)
# do nothing
newarray<<row
prevrow=row
elsif (prevrow!=nil and row[0]!=prevrow[0] )
# do something
newarray<<row
prevrow=row
##count=1
elsif(prevrow!=nil and row[0]=prevrow[0] and ##count<4)
puts "new date"
newarray<<row
prevrow=row
##count++
end
end
removesamedirctiontop4.rb:23: syntax error, unexpected keyword_else
removesamedirctiontop4.rb:27: syntax error, unexpected end-of-input, expecting keyword_end
#count++ is not valid ruby. The final "plus" is expecting another parameter and thinks it's on the next line, so the line ends up being interpreted as...
`#count + +end`
So you have an invalid statement and you lose an end.
Change the offending line to
#count += 1
Closed. This question is not reproducible or was caused by typos. It is not currently accepting answers.
This question was caused by a typo or a problem that can no longer be reproduced. While similar questions may be on-topic here, this one was resolved in a way less likely to help future readers.
Closed 8 years ago.
Improve this question
I'm trying to loop over all environment variables in a shell script, and create an HTML query string from ones which match a pattern. Unfortunately, I can't seem to assign to variables in the loop. I've got this:
#!/bin/sh
IFS=$'\n'
TAGS=""
for item in $(printenv)
do
if [[ $item == FOO_TAG_* ]]
then
TAGS = "${TAGS}&${item}"
fi
done
But this gives me
/etc/script.sh: line 9: TAGS: command not found
/etc/script.sh: line 9: TAGS: command not found
How do I fix this?
In the assignment, remove space between variable name and =
TAGS="${TAGS}${item}"
Closed. This question needs details or clarity. It is not currently accepting answers.
Want to improve this question? Add details and clarify the problem by editing this post.
Closed 9 years ago.
Improve this question
I am trying to test if the user has a Ruby version greater than or equal to 1.9.0, and if not, update it.
output = `ruby -v`
if !output ~> "1.9.0"
But as I read, if the version is 1.8.7, then it would say that it is above 1.9.0 since ~> means that the version is approximately greater than the last digit.
Correction to the original question , the ~> is not valid, was a misinterpretation to a gem specific thing I read.
You can use strings
RUBY_VERSION < '1.9.0'
There are a few gems available for this.
Versionomy is probably the most popular. You'll use something like this:
require 'versionomy'
v1 = Versionomy.parse('0.1')
v2 = Versionomy.parse('0.2.1')
v3 = Versionomy.parse('0.44')
v1 < v2 # => true
v2 < v3 # => true
v1 > v2 # => false
v2 > v3 # => false
Also note that there's a top level constant RUBY_VERSION you can use the get the Ruby version within rails.
Edit: If you simply want to check the second digit you can use:
version = RUBY_VERSION.split(".")[1]
This will return '9' for 1.9.2.