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Proper use of beginBackgroundTaskWithExpirationHandler
... If you call doUpdate multiple times in a row without the work is done, you will overwrite self.backgroundUpdateTask so previous tasks can't be ended properly. You should either store the task identifier each time so you end it properly or use a counter in the begin/end methods.
...
is node.js' console.log asynchronous?
...d bytes in %dms', data.length, Date.now() - start);
Result
....a lot of ones....1111111111111111
wrote 208896 bytes in 17ms
real 0m0.969s
user 0m0.068s
sys 0m0.012s
The terminal needs around 1 seconds to print out the sockets content, but node only needs 17 milliseconds to push the data...
Exit a Script On Error
I'm building a Shell Script that has a if function like this one:
5 Answers
5
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Warning “Do not Access Superglobal $_POST Array Directly” on Netbeans 7.4 for PHP
..., which explains some new hints introduced in NetBeans 7.4, including this one:
https://blogs.oracle.com/netbeansphp/entry/improve_your_code_with_new
The reason why it has been added is because superglobals usually are filled with user input, which shouldn't ever be blindly trusted. Instead, some ...
What does “xmlns” in XML mean?
...he tags that start with personxml: are tags belonging to your XML, all the ones that start with cityxml: are mine.
There are a few points to note:
If you exclude any namespace declarations, things are considered to be in the default namespace.
If you declare a namespace without the identifier, th...
How do I make a fully statically linked .exe with Visual Studio Express 2005?
...asing results were based on more luck that I would like. Attempting to run one of these programs on an old (2001 vintage, not scrupulously updated) XP box gave me nothing but a nasty "System cannot run x.exe" (or similar) message.
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Save PL/pgSQL output from PostgreSQL to a CSV file
... of bounds" will be fully accessible. You probably don’t want to let someone invoke your function and add rows on the end of your “users” table…
I've written a blog post expanding on this approach, including some examples of functions that export (or import) files and tables meeting strict...
Should you commit .gitignore into the Git repos?
...
Normally yes, .gitignore is useful for everyone who wants to work with the repository. On occasion you'll want to ignore more private things (maybe you often create LOG or something. In those cases you probably don't want to force that on anyone else.
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Heroku Postgres - terminate hung query (idle in transaction)
...ot or postgres permissions you can also do it from the shell. To "cancel" one can do:
kill -INT 1234
and to "terminate", simply:
kill 1234
DO NOT:
kill -9 1234
... that will often result in the the whole postgres server going down in flames, then you may as well restart postgres. Postgres...
Add a new element to an array without specifying the index in Bash
... # put all the indices in an array
$ end=${end[@]: -1} # get the last one
$ echo $end
42
That illustrates how to get the last element of an array. You'll often see this:
$ echo ${array[${#array[@]} - 1]}
g
As you can see, because we're dealing with a sparse array, this isn't the last eleme...