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Write lines of text to a file in R
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fileConn<-file("output.txt")
writeLines(c("Hello","World"), fileConn)
close(fileConn)
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How to append output to the end of a text file
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To append a file use >>
echo "hello world" >> read.txt
cat read.txt
echo "hello siva" >> read.txt
cat read.txt
then the output should be
hello world # from 1st echo command
hello world # from 2nd echo command
hello siva
To overwrite a file use >
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How to customize a requirements.txt for multiple environments?
...h expects each branch's dependencies in a single file called 'requirements.txt'.
3 Answers
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Concatenating Files And Insert New Line In Between Files
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You can do:
for f in *.txt; do (cat "${f}"; echo) >> finalfile.txt; done
Make sure the file finalfile.txt does not exist before you run the above command.
If you are allowed to use awk you can do:
awk 'FNR==1{print ""}1' *.txt > finalf...
How do I concatenate two text files in PowerShell?
...Simply use the Get-Content and Set-Content cmdlets:
Get-Content inputFile1.txt, inputFile2.txt | Set-Content joinedFile.txt
You can concatenate more than two files with this style, too.
If the source files are named similarly, you can use wildcards:
Get-Content inputFile*.txt | Set-Content joinedFi...
Android Gradle plugin 0.7.0: “duplicate files during packaging of APK”
...d:
android {
packagingOptions {
exclude 'META-INF/LICENSE.txt'
exclude 'META-INF/NOTICE.txt'
exclude '...'
}
}
to your build.gradle file.
History:
According to comment 14 in this bug: https://issuetracker.google.com/issues/36982149#comment14 this is a b...
Upgrade python packages from requirements.txt using pip command
How do I upgrade all my python packages from requirements.txt file using pip command?
13 Answers
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Unix command to prepend text to a file
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printf '%s\n%s\n' "to be prepended" "$(cat text.txt)" >text.txt
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How to install packages using pip according to the requirements.txt file from a local directory?
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This works for me:
$ pip install -r requirements.txt --no-index --find-links file:///tmp/packages
--no-index - Ignore package index (only looking at --find-links URLs instead).
-f, --find-links <URL> - If a URL or path to an html file, then parse for links to arch...
Concatenate multiple files but include filename as section headers
...s looking for the same thing, and found this to suggest:
tail -n +1 file1.txt file2.txt file3.txt
Output:
==> file1.txt <==
<contents of file1.txt>
==> file2.txt <==
<contents of file2.txt>
==> file3.txt <==
<contents of file3.txt>
If there is only a singl...