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source command not found in sh shell
I have a script that uses sh shell. I get an error in the line that uses the source command. It seems source is not included in my sh shell.
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How do I round to the nearest 0.5?
...not correct. Since arithmetic with doubles usually has some small rounding errors, an operation such as 4.8 - 4.0 could give for example 0.799999... . In this case the code above would round to 4.5. Also better would to use Math.Floor instead of Math.Truncate, because right now negative numbers are...
Is there any way I can define a variable in LaTeX?
...xisting macros without any warnings and therefore can cause various subtle errors. To overcome this either use namespaced variables like my_var or fall back to \newcommand, \renewcommand commands instead.
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How to find out the MySQL root password
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i can't do this mysql -u root. It shows error Access denied
– Avinash Raj
May 17 '15 at 3:45
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How to install Maven 3 on Ubuntu 18.04/17.04/16.10/16.04 LTS/15.10/15.04/14.10/14.04 LTS/13.10/13.04
...ollowing:
set it up from scratch
repair it if apt-get update gives a 404 error after add-apt-repository
repair it if apt-get update gives a NO_PUBKEY error after manually adding it to /etc/apt/sources.list
Open a terminal and run the following:
sudo -i
Enter your password if necessary, then p...
How to check if a file is empty in Bash?
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Using the tool shellcheck can find spelling errors just fine.
– Yokai
Oct 3 '16 at 3:30
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How can I capture the result of var_dump to a string?
...port(''); var_export('\'');. And most importantly, get ready for PHP Fatal error: Nesting level too deep - recursive dependency? in C:\path\file.php on line 75
– Pacerier
Mar 25 '15 at 15:12
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Get: TypeError: 'dict_values' object does not support indexing when using python 3.2.3 [duplicate]
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Unfortuately, when I use the vlst example, I get an error "'dict' object has no attribute 'values'
– Jesse Pet
Jul 2 '13 at 17:18
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Pass a data.frame column name to a function
...If there is a typo in the column name, then would be safer to stop with an error:
fun <- function(x, column) max(x[[match.call()$column]])
fun(df, typo)
#> Warning in max(x[[match.call()$column]]): no non-missing arguments to max;
#> returning -Inf
#> [1] -Inf
# Stop with error in case...
Write to file, but overwrite it if it exists
... bash version 4.3.48(1)-release. echo "aaa" &>| test.txt results in error -bash: syntax error near unexpected token |. My noclobber is set On.
– Tu Bui
May 17 '19 at 17:46
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