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How to exit if a command failed?
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Try:
my_command || { echo 'my_command failed' ; exit 1; }
Four changes:
Change && to ||
Use { } in place of ( )
Introduce ; after exit and
spaces after { and before }
Since you want to print the message and exit only when the command fails ( exits with non-zero va...
How do I round to the nearest 0.5?
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edited May 20 '19 at 11:35
extempl
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answered Aug 25 ...
Cannot refer to a non-final variable inside an inner class defined in a different method
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197
Java doesn't support true closures, even though using an anonymous class like you are using he...
What are the best practices to follow when declaring an array in Javascript?
...rray(5); // an array pre-sized to 5 elements long
var b = new Array(5, 10); // an array with two elements in it
Note that there's no way with new Array() to create an array with just one pre-specified number element in it!
Using [] is actually more efficient, and safer too! It's possible to ...
C# Passing Function as Argument [duplicate]
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146
Using the Func as mentioned above works but there are also delegates that do the same task and...
Log4net rolling daily filename with date in the file name
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104
In your Log4net config file, use the following parameter with the RollingFileAppender:
<pa...
How do I find where an exception was thrown in C++?
..." frames\n\n";
// overwrite sigaction with caller's address
array[1] = caller_address;
char ** messages = backtrace_symbols(array, size);
// skip first stack frame (points here)
for (int i = 1; i < size && messages != NULL; ++i) {
std::cerr << "[bt]: (...
How do I mock an open used in a with statement (using the Mock framework in Python)?
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131
The way to do this has changed in mock 0.7.0 which finally supports mocking the python protoco...
How to get the element clicked (for the whole document)?
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241
You need to use the event.target which is the element which originally triggered the event. The ...
Replace non-ASCII characters with a single space
...ld use a conditional expression instead:
return ''.join([i if ord(i) < 128 else ' ' for i in text])
This handles characters one by one and would still use one space per character replaced.
Your regular expression should just replace consecutive non-ASCII characters with a space:
re.sub(r'[^\...