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Installing R with Homebrew
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I got error: Error: homebrew/science was deprecated. This tap is now empty as all its formulae were migrated.
– Menglong Li
Jul 3 '18 at 13:24
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How do I grab an INI value within a shell script?
... filter it out as shown above, e.g. grep =), the same for other unexpected errors.
If you need to read specific value under specific section, use grep -A, sed, awk or ex).
E.g.
source <(grep = <(grep -A5 '\[section-b\]' file.ini))
Note: Where -A5 is the number of rows to read in the section...
Add regression line equation and R^2 on graph
...arry! This is related to how R's parse() function works. Through trial and error I found that aes(label = paste(..eq.label.., ..rr.label.., sep = "*plain(\",\")~")) does the job.
– Pedro Aphalo
Apr 8 '17 at 10:09
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How exactly does a generator comprehension work?
...t recent call last):
File "<stdin>", line 1, in <module>
TypeError: object of type 'generator' has no len()
>>> # We extract each item out individually. We'll do it manually first.
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>>> next(filtered_gen)
5
>>> next(filtered_gen)
9
>>> next(filte...
Nested or Inner Class in PHP
...xists, if not we throw an exception
* similar to the default error
*/
if (method_exists($this, $method)) {
/* The method exists so now we want to know if the
* caller is a child of our Package class. If not we throw an excepti...
Assign output of a program to a variable using a MS batch file
...eric return code, you can do the following
application arg0 arg1
set VAR=%errorlevel%
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How to log cron jobs?
... in
/var/log/syslog, as already mentioned by @Matthew Lock.
The logging of errors AFTER the program tried to execute, which can be sent to
an email or to a file, as mentioned by @Spliffster. I prefer logging
to a file, because with email THEN you have a NEW source of
problems, and its checking if em...
How to obtain the number of CPUs/cores in Linux from the command line?
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The most portable solution I have found is the getconf command:
getconf _NPROCESSORS_ONLN
This works on both Linux and Mac OS X. Another benefit of this over some of the other approaches is that getconf has been around for a long time. Some of the older Linux machines I have to do development o...
Print number of keys in Redis
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edited Aug 28 '15 at 18:05
answered Mar 27 '12 at 16:44
s...
Import SQL dump into PostgreSQL database
...ve tried that psql mydatabase < C:\database\db-backup.sql but i get the error Invalid command \database. I also tried with " " around it.
– dazz
Jul 27 '11 at 10:05
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