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Output array to CSV in Ruby
...enerate_line(row) }.join("")
#=> "a1,a2,a3\nb1,b2,b3\nc1,c2,c3\n"
Do all of the above and save to a csv, in one line.
File.open("ss.csv", "w") {|f| f.write(rows.inject([]) { |csv, row| csv << CSV.generate_line(row) }.join(""))}
NOTE:
To convert an active record database to csv would...
What does the Java assert keyword do, and when should it be used?
... @hoodaticus you mean solely the fact that I can turn on/off all assertions for prod code is the reason? Because I can do complex data validation anyways and then handle it with exceptions. If I have production code, I could turn off the complex (and maybe expensive) assertions, becaus...
Abstraction VS Information Hiding VS Encapsulation
...ften achieved through information hiding, which
is the process of hiding all of the secrets of object that do not
contribute to its essential characteristics.
In other words: abstraction = the object externally; encapsulation (achieved through information hiding) = the object internally,
Exam...
Find when a file was deleted in Git
... forgot the whole name of the file =( maybe it is possible to get a log of all deletions?
– wutzebaer
Jun 27 '14 at 8:15
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Determine which MySQL configuration file is being used
...inux, then start the 'mysqld' with strace, for eg strace ./mysqld.
Among all the other system calls, you will find something like:
stat64("/etc/my.cnf", 0xbfa3d7fc) = -1 ENOENT (No such file or directory)
stat64("/etc/mysql/my.cnf", {st_mode=S_IFREG|0644, st_size=4227, ...}) = 0
open("/etc/...
Split large string in n-size chunks in JavaScript
...spaces, it does not count in the length"? Yes, . does not match newline at all. I will update the answer so that it takes \n and \r into account.
– Vivin Paliath
Apr 17 '15 at 21:14
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Solution for “Fatal error: Maximum function nesting level of '100' reached, aborting!” in PHP
I have made a function that finds all the URLs within an html file and repeats the same process for each html content linked to the discovered URLs. The function is recursive and can go on endlessly. However, I have put a limit on the recursion by setting a global variable which causes the recursion...
Xcode 6 Storyboard the wrong size?
...you to get used to size classes as they are the future, and you will eventually jump in anyway at some point."
You probably haven't added the layout constraints.
Select your label, tap the layout constraints button on the bottom:
On that menu add width and height (it should NOT be the same as...
Do I need elements in persistence.xml?
...k at the Chapter2. Setup and configuration too for more details.
EDIT: Actually, If you don't mind not being spec compliant, Hibernate supports auto-detection even in Java SE. To do so, add the hibernate.archive.autodetection property:
<persistence-unit name="eventractor" transaction-type="RESOUR...
Wrapping chained method calls on a separate line in Eclipse for Java
I haven't been successful in figuring out how to wrap each method call in Eclipse . For example, I have this:
7 Answers
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