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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...
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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What does the “assert” keyword do? [duplicate]
...tement
assert cond;
is equivalent to
if (!cond)
throw new AssertionError();
If you launch your program without this option, the assert statement will have no effect.
For example, assert d >= 0 && d <= s.length();, as posted in your question, is equivalent to
if (!(d >= 0...
Difference between `constexpr` and `const`
.... Therefore, you cannot use it as a constant expression:
int arr[mx]; // error: “constant expression required”
constexpr is a new C++11 keyword that rids you of the need to create macros and hardcoded literals. It also guarantees, under certain conditions, that objects undergo static initiali...
uncaught syntaxerror unexpected token U JSON
I get this error "uncaught syntaxerror unexpected token U" when I run my page in chrome. And in firefox I get, "JSON.parse: unexpected character". I'm returning the json data from a php file and the returning json string is valid. I checked it with http://jsonlint.com/ . Any help would be apprecia...
Error: CUICatalog: Invalid asset name supplied: (null), or invalid scale factor : 2.000000
... Not sure to understand why it doesn't work for me, always returning error: use of undeclared identifier '$arg3'. Did I miss something?
– Ben
Nov 13 '15 at 12:46
6
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How can I troubleshoot my Perl CGI script?
...CGI.pm and its derivatives, print header(). Some servers are sensitive to error output (on STDERR) showing up before standard output (on STDOUT).
Try sending errors to the browser
Add this line
use CGI::Carp 'fatalsToBrowser';
to your script. This also sends compilation errors to the browser ...
How do I resolve the “java.net.BindException: Address already in use: JVM_Bind” error?
In Eclipse, I got this error:
19 Answers
19
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How to solve error message: “Failed to map the path '/'.”
...my website I try to navigate to (even addresses that don't exist give this error instead of a 404), I get the exact same message (the path is always '/'). Any ideas?
...
What are the “standard unambiguous date” formats for string-to-date conversion in R?
...' then '"%Y/%m/%d"' on the first non-'NA' element,
and give an error if neither works.
as.Date("01 Jan 2000") yields an error because the format isn't one of the two listed above. as.Date("01/01/2000") yields an incorrect answer because the date isn't in one of the two formats listed...