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How to check if an object is a list or tuple (but not string)?
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H = "Hello"
if type(H) is list or type(H) is tuple:
## Do Something.
else
## Do Somet...
When and why I should use session_regenerate_id()?
... is identified by his session id.
// User orders items
$shopcart->add('123', 20);
$shopcart->add('124', 18);
$shopcart->add('127', 5);
For each product added, a record is made in my shopcart table. Also identified by the session id.
// User saves cart in order to use it later
$shopcart-...
select * vs select column
If I just need 2/3 columns and I query SELECT * instead of providing those columns in select query, is there any performance degradation regarding more/less I/O or memory?
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How to create a new (and empty!) “root” branch?
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vcsjonesvcsjones
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How does a garbage collector avoid an infinite loop here?
...minated and the process will terminate. These are old values though so Microsoft might have tweaked the actual numbers or even the whole algorithm by now. Se blog.stephencleary.com/2009/08/finalizers-at-process-exit.html
– Lasse V. Karlsen
Jul 9 '14 at 19:52
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What does “%.*s” mean in printf?
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You can use an asterisk (*) to pass the width specifier/precision to printf(), rather than har...
Detect 7 inch and 10 inch tablet programmatically
...and it incorrectly reports a resolution of 1280x752. I stumbled upon this post here that confirms this. Basically, in ICS/JB the calculations using the metrics mentioned above appear to exclude the dimensions of the Navigation Bar. Some more research led me to Frank Nguyen's answer here that uses d...
What's the best way to send a signal to all members of a process group?
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As usual with almost any command, if you want a normal argument that starts with a - to not be interpreted as a switch, precede it with --: kill -- -GPID
– ysth
Dec 24 '08 at 21:47
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Error: could not find function … in R
...nctions.
If you have no clue about the package, you can use findFn in the sos package as explained in this answer.
RSiteSearch("some.function") or searching with rdocumentation or rseek are alternative ways to find the function.
Sometimes you need to use an older version of R, but run code created...
Securely storing environment variables in GAE with app.yaml
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Of all the provided answers, this seems closest to how Heroku handles things. Being rather new to GAE, I don't quite understand where in the Developers Console to find the placeholder record. Can you explain, or for bonus points, post screenshots?
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