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Python: try statement in a single line
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Some people abuse the short-circuiting behavior of or to do this. This is error prone, so I never use it.
c = None
b = [1, 2]
a = c or b
Consider the following case:
c = []
b = [1, 2]
a = c or b
In this case, a probably should be [], but it is [1, 2] because [] is false in a boolean context. ...
Error : BinderProxy@45d459c0 is not valid; is your activity running?
What is this error... i haven't found any discussion on this error in the stackoverflow community Detailed :-
9 Answers
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How to check if a file exists in Documents folder?
...th: method. It's often better to just try to open a file and deal with the error if the file does not exist.
NSFileManager Class Reference
Note: Attempting to predicate behavior based on the current state of the file system or a particular file on the file system is not recommended. Doing so can ca...
undefined reference to boost::system::system_category() when compiling
....46-dev Boost libraries from the Ubuntu Repository installed, but I get an error when compiling the program.
9 Answers
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Set type for function parameters?
... Flow library from Facebook, "a static type checker, designed to find type errors in JavaScript programs"
Definition:
/* @flow */
function foo(x: string, y: number): string {
return x.length * y;
}
foo('Hello', 42);
Type checking:
$> flow
hello.js:3:10,21: number
This type is incompatib...
In Python, how do I use urllib to see if a website is 404 or 200?
... In python 3.4, if there is a 404, urllib.request.urlopen returns a urllib.error.HTTPError.
– mcb
May 10 '17 at 7:43
D...
When to catch java.lang.Error?
In what situations should one catch java.lang.Error on an application?
16 Answers
16...
Is there a TRY CATCH command in Bash
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} || { # catch
# save log for exception
}
Also bash contains some error handling mechanisms, as well
set -e
it stops your script if any simple command fails.
And also why not if...else. It is your best friend.
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Can't use method return value in write context
..., return value exists and contains null). Therefore:
if (!empty($r->getError()))
is logically equivalent to:
if ($r->getError())
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Best practices for exception management in Java or C# [closed]
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It seems odd to me that you want to catch exceptions and turn them into error codes. Why do you think the caller would prefer error codes over exceptions when the latter is the default in both Java and C#?
As for your questions:
You should only catch exceptions that you can actually handle. J...