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What linux shell command returns a part of a string? [duplicate]
... Even though I have the "accepted" answer, I would like to point out that if you want to do a lot of sub-string extraction, using the built-in substring expansion (see dmckee's answer) is the more efficient way to go. That said, cut is easier to remember and use.
– T...
Cannot simply use PostgreSQL table name (“relation does not exist”)
... a schema to the "search_path" so that when you reference a table name without qualifying its schema, the query will match that table name by checked each schema in order. Just like PATH in the shell or include_path in PHP, etc. You can check your current schema search path:
SHOW search_path
"$...
How to specify more spaces for the delimiter using cut?
... awk '{print $5}'
or you can ditch the grep altogether since awk knows about regular expressions:
ps axu | awk '/[j]boss/ {print $5}'
But if, for some bizarre reason, you really can't use awk, there are other simpler things you can do, like collapse all whitespace to a single space first:
ps a...
How do I trim whitespace from a string?
...
As pointed out in answers above
myString.strip()
will remove all the leading and trailing whitespace characters such as \n, \r, \t, \f, space.
For more flexibility use the following
Removes only leading whitespace chars: myString...
MySQL dump by query
...ect * from myTable" -u myuser -pxxxxxxxxx mydatabase
you can redirect it out to a file if you want :
mysql -e "select * from myTable" -u myuser -pxxxxxxxx mydatabase > mydumpfile.txt
Update:
Original post asked if he could dump from the database by query. What he asked and what he meant wer...
Nested Git repositories?
...he comment seems to agree that there is a value in the blog article. Turns out you don't have to sacrifice accuracy for clarity and operation-specific advice. After reading it, I would imagine the author had already researched a bit and probably read the actual Git documentation, not just the kernel...
elasticsearch v.s. MongoDB for filtering application [closed]
This question is about making an architectural choice prior to delving into the details of experimentation and implementation. It's about the suitability, in scalability and performance terms, of elasticsearch v.s. MongoDB, for a somewhat specific purpose.
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iOS app, programmatically get build version
...aryKey("CFBundleVersion") as! String
Its included in this repo, check it out:
https://github.com/goktugyil/EZSwiftExtensions
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How can I add a string to the end of each line in Vim?
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:%s/$/\*/g
should work. So should :%s/$/*/g as MrWiggles points out correctly.
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How to use mongoimport to import csv
... Excel for Mac 2011 version using the default "Save as.." "xls as csv" without specifying "Windows Comma Separated(.csv)" format specifically. After researching this site and trying the "Save As again using "Windows Comma Separated (.csv)" format, mongoimport worked fine. I think mongoimport expec...