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Multi-Line Comments in Ruby?
...begin and =end must be at the beginning of the line or
it will be a syntax error.
=end
puts "Hello world!"
<<-DOC
Also, you could create a docstring.
which...
DOC
puts "Hello world!"
"..is kinda ugly and creates
a String instance, but I know one guy
with a Smalltalk background, who
does th...
What does `kill -0 $pid` in a shell script do?
...pages:
kill(1)
$ man 1 kill
...
If sig is 0, then no signal is sent, but error checking is still performed.
...
kill(2)
$ man 2 kill
...
If sig is 0, then no signal is sent, but error checking is still performed; this
can be used to check for the existence of a process ID or process group ID.
...
Constant pointer vs Pointer to constant [duplicate]
...pointer
constant_pointer.c: In function ‘main’:
constant_pointer.c:13: error: increment of read-only variable ‘ptr’
Hence we see very clearly above that compiler complains that we cannot changes the address held by a constant pointer.
Pointer to Constants
#include<stdio.h>
int mai...
Python decorators in classes
...
TypeError: 'staticmethod' object is not callable
– wyx
Dec 1 '18 at 9:57
...
Print PHP Call Stack
...
To log the trace
$e = new Exception;
error_log(var_export($e->getTraceAsString(), true));
Thanks @Tobiasz
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Using wget to recursively fetch a directory with arbitrary files in it
I have a web directory where I store some config files. I'd like to use wget to pull those files down and maintain their current structure. For instance, the remote directory looks like:
...
Download a specific tag with Git
...upports that.
– lzap
Jul 8 '14 at 9:05
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How to convert JSON data into a Python object
...
this may result in a Value error, ValueError: Type names and field names cannot start with a number: '123'
– PvdL
Apr 11 '14 at 21:01
...
How to make a SPA SEO crawlable?
... So in web.config I add the following line to redirect these to a specific error handling controller:
<customErrors mode="On" defaultRedirect="Error">
<error statusCode="404" redirect="Error" />
</customErrors><br/>
Now, this transforms the URL to something like: http:...
Max or Default?
...nce DefaultIfEmpty isn't implemented in LINQ to SQL, I did a search on the error it returned and found a fascinating article that deals with null sets in aggregate functions. To summarize what I found, you can get around this limitation by casting to a nullable within your select. My VB is a little ...