I am trying to understand what the grep command in ubuntu is trying to do here.
The contents of my test file is given below
When I grep for 3 dots (...) without the parenthesis as follows I would expect the output to match the first 3 characters in the above file. But the output I am seeing shows that it matches more than 3 characters in some lines. Can anyone help me here understand why the 3rd line is being shown to match more than 3 characters.
please send the logic or program to find the matching characters between two strings
for ex string1 :abc
string2 :adc
no .of matching characters is 2(a,c) (9 Replies)
how do i check if the first character is a parenthese in pattern matching?
if ] obviously doesnt work. How do I use it to compare so it doesnt try to use it to group. (5 Replies)
Hi there,
I have a file with lines like these:
0105:ffff0000:001b:01f4:25:434
0299:ffff0000:0009:01f4:2:319
02d2:ffff0000:000e:01f4:2:507
The above values are split up using ":" characters.
I would like capture each value, no matter what length.
Take for example the first line... (8 Replies)
Dear all,
I'm stuck on a certain problem regarding counting the number of characters in one line and then adjusting the number of characters of another line to this number.
This was my original input data:
@HWI-ST471_57:1:1:1231:2079/2... (4 Replies)
hi
i am writing a hangman script and am having trouble checking the correct letters against the word
i need the script to compare the word against the letters guessed that are correct so once all the letters within the word have been guessed it will alow me to create a wining senario
eg
... (3 Replies)
hi
i am writing a hangman script and am having trouble checking the correct letters against the word
i need the script to compare the word against the letters guessed that are correct so once all the letters within the word have been guessed it will alow me to create a wining senario
this must... (1 Reply)
I want to check where our programmers are using "delete" instead of "delete" in their C++ code:
grep -r delete *cpp | grep -v
However, this statement and variations thereof (escaping with backslash (\), single quotes ('), double quotes ("), accolades ({)) always lead to the following message:... (2 Replies)
I need to write an Unix script to report the number of SQL files in my home directory, ending with .sql . The script should, also, be checking whether there is a file with an underscore in its name. If that is the case, the underscore should be converted to a dash (‐); for example... (1 Reply)
hii all
i have a file a which contains some thing like this
strand smthg position
+ yyx 3020
- yyw 10,000
now i have another file (file2) which contains the data starting from 1 to n positions
i want to refer first file if + ... (4 Replies)
hi to all,
i am writing a simple file program in C which has to take a string of length n as input and match that input string with first n character of the line in file. if it does not match it has to compare with first n characters of next line. i am finding it difficult to know how exactly to... (2 Replies)
Discussion started by: ntrikoti
2 Replies
LEARN ABOUT LINUX
npm-run-script
NPM-RUN-SCRIPT(1)NPM-RUN-SCRIPT(1)NAME
npm-run-script - Run arbitrary package scripts
SYNOPSIS
npm run-script <command> [--silent] [-- <args>...]
alias: npm run
DESCRIPTION
This runs an arbitrary command from a package's "scripts" object. If no "command" is provided, it will list the available scripts.
run[-script] is used by the test, start, restart, and stop commands, but can be called directly, as well. When the scripts in the package
are printed out, they're separated into lifecycle (test, start, restart) and directly-run scripts.
As of ` https://blog.npmjs.org/post/98131109725/npm-2-0-0, you can use custom arguments when executing scripts. The special option -- is
used by getopt https://goo.gl/KxMmtG to delimit the end of the options. npm will pass all the arguments after the -- directly to your
script:
npm run test -- --grep="pattern"
The arguments will only be passed to the script specified after npm run and not to any pre or post script.
The env script is a special built-in command that can be used to list environment variables that will be available to the script at run-
time. If an "env" command is defined in your package, it will take precedence over the built-in.
In addition to the shell's pre-existing PATH, npm run adds node_modules/.bin to the PATH provided to scripts. Any binaries provided by
locally-installed dependencies can be used without the node_modules/.bin prefix. For example, if there is a devDependency on tap in your
package, you should write:
"scripts": {"test": "tap test/*.js"}
instead of
"scripts": {"test": "node_modules/.bin/tap test/*.js"}
to run your tests.
The actual shell your script is run within is platform dependent. By default, on Unix-like systems it is the /bin/sh command, on Windows it
is the cmd.exe. The actual shell referred to by /bin/sh also depends on the system. As of `
https://github.com/npm/npm/releases/tag/v5.1.0 you can customize the shell with the script-shell configuration.
Scripts are run from the root of the module, regardless of what your current working directory is when you call npm run. If you want your
script to use different behavior based on what subdirectory you're in, you can use the INIT_CWD environment variable, which holds the full
path you were in when you ran npm run.
npm run sets the NODE environment variable to the node executable with which npm is executed. Also, if the --scripts-prepend-node-path is
passed, the directory within which node resides is added to the PATH. If --scripts-prepend-node-path=auto is passed (which has been the
default in npm v3), this is only performed when that node executable is not found in the PATH.
If you try to run a script without having a node_modules directory and it fails, you will be given a warning to run npm install, just in
case you've forgotten.
You can use the --silent flag to prevent showing npm ERR! output on error.
You can use the --if-present flag to avoid exiting with a non-zero exit code when the script is undefined. This lets you run potentially
undefined scripts without breaking the execution chain.
SEE ALSO
o npm help 7 scripts
o npm help test
o npm help start
o npm help restart
o npm help stop
o npm help 7 config
January 2019 NPM-RUN-SCRIPT(1)