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Explanation of BASE terminology
...m gives up on consistency.
Basically available indicates that the system does guarantee availability, in terms of the CAP theorem.
Soft state indicates that the state of the system may change over time, even without input. This is because of the eventual consistency model.
Eventual consistency ind...
How to make “if not true condition”?
... ; then
grep returns true if it finds the search target, and false if it doesn't.
So NOT false == true.
if evaluation in shells are designed to be very flexible, and many times doesn't require chains of commands (as you have written).
Also, looking at your code as is, your use of the $( ... ) ...
What does the JSLint error 'body of a for in should be wrapped in an if statement' mean?
... You should not use for in to iterate over arrays because the language does not garauntee the order in which for in will enumerate over an array. It might not be in numeric order. In addition, if you use the `for(i=0;i<array.length;i++) style construct, you can be sure that you're only iterat...
How can I parse a CSV string with JavaScript, which contains comma in data?
...rmat of CSV. As correctly pointed out by DG in the comments, this solution does not fit the RFC 4180 definition of CSV and it also does not fit Microsoft Excel format. This solution simply demonstrates how one can parse one (non-standard) CSV line of input which contains a mix of string types, where...
Why does using an Underscore character in a LIKE filter give me all the results?
..., 'xyzabc' and so on, but no 'xyzabcd', 'xabcdd' and any other string that does not end with 'abc'.
In your case you have searched by '%_%'. This will give all the rows with that column having one or more characters, that means any characters, as its value. This is why you are getting all the rows ...
What does git rev-parse do?
What does git rev-parse do?
3 Answers
3
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How to use the pass statement?
...tationError: expected an indented block
To summarize, the pass statement does nothing particular, but it can act as a placeholder, as demonstrated here.
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How does `scp` differ from `rsync`?
...ification has nothing to do with this
option’s before-the-transfer “Does this file need to be updated?”
check.
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How can I have grep not print out 'No such file or directory' errors?
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@Alex @Dogbert This does answer the question, but '-s' can mask problems, e.g. when you use xargs with grep. Try creating 2 files in a dir, 'aaa.txt' and 'a b.txt', both containing the string 'some text'. The command /bin/ls -1 | xargs grep 'som...
How does the SQL injection from the “Bobby Tables” XKCD comic work?
...ven worse!
school=> SELECT * FROM students;
ERROR: relation "students" does not exist
LINE 1: SELECT * FROM students;
^
This drops (deletes) the student table.
(All code examples in this answer were run on a PostgreSQL 9.1.2 database server.)
To make it clear what's happe...