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How do I use a file grep comparison inside a bash if/else statement?
...grep:
Exit status is 0 if any line was selected, 1 otherwise;
if any error occurs and -q was not given, the exit status is 2.
if grep --quiet MYSQL_ROLE=master /etc/aws/hosts.conf; then
echo exists
else
echo not found
fi
You may want to use a more specific regex, such as ^MYSQL_ROLE=ma...
Outlook autocleaning my line breaks and screwing up my email format
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answered Apr 12 '16 at 15:05
supernovasupernova
2,59433 gold badges2525 silver badges2828 bronze badges
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Function to clear the console in R and RStudio
I am wondering if there is a function to clear the console in R and, in particular, RStudio I am looking for a function that I can type into the console, and not a keyboard shortcut.
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Find and replace with sed in directory and sub directories
... For Mac OS, this answers stackoverflow.com/questions/19242275/… the RE error: illegal byte sequence
– kakoma
Aug 14 '17 at 21:27
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How to force Selenium WebDriver to click on element which is not currently visible?
...ny times I've had two elements at play and one is hidden and gives me this error.
– Chris
Jun 11 '19 at 15:53
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List of tuples to dictionary
...ut-313-7bb3559567ff>", line 1, in <module> dict(my_list) TypeError: 'Dictionary' object is not callable
– CKM
Apr 23 '18 at 5:57
4
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How to find out the number of CPUs using python
...n >= 2.6 you can simply use
import multiprocessing
multiprocessing.cpu_count()
http://docs.python.org/library/multiprocessing.html#multiprocessing.cpu_count
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Why can't I overload constructors in PHP?
...ll variables are set that are required to be set. Secondly no compile-time error is thrown, rather you have to rely on a runtime error that may or may not occur depending on the usage of the variables.
– Mazzy
Jan 10 '19 at 21:05
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What are the nuances of scope prototypal / prototypical inheritance in AngularJS?
...xes.
– Mark Rajcok
Jan 12 '13 at 19:05
15
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Inject errors into already validated form?
...for further processing. This external process can potentially find further errors in the values.
4 Answers
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