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Pandas read_csv low_memory and dtype options
...aving to change the dtype of that column when you read the last value.
Consider the example of one file which has a column called user_id.
It contains 10 million rows where the user_id is always numbers.
Since pandas cannot know it is only numbers, it will probably keep it as the original strings un...
Why doesn't Java allow generic subclasses of Throwable?
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As mark said, the types are not reifiable, which is a problem in the following case:
try {
doSomeStuff();
} catch (SomeException<Integer> e) {
// ignore that
} catch (SomeException<String> e) {
crashAndBurn()
}
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How to decide between MonoTouch and Objective-C? [closed]
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I switched. Monotouch let's me write apps at least 3-4 times as fast (4 apps per month compared to my old 1 per month in Obj C)
Lots less typing.
Just my experience.
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An explicit value for the identity column in table can only be specified when a column list is used
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Summary
SQL Server won't let you insert an explicit value in an identity column unless you use a column list. Thus, you have the following options:
Make a column list (either manually or using tools, see below)
OR
make the identity column in tbl_A_archive a regular, non-identity column...
How to link a Facebook app with an existing fan page
... The key is making sure App Page is the ONLY category. We had "Video Game" and "App Page" and this didn't work until we removed "Video Game." As an aside Facebook's workflow is insane--almost like it was written by a 19-year-old in his dorm room.
– Mike Pandolfini
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Check if an element is a child of a parent
...ive it the selector, as in target.parent('div#hello').
Example: http://jsfiddle.net/6BX9n/
function fun(evt) {
var target = $(evt.target);
if (target.parent('div#hello').length) {
alert('Your clicked element is having div#hello as parent');
}
}
Or if you want to check to ...
How to detect UI thread on Android?
Is there a robust way to detect if Thread.currentThread() is the Android system UI thread in an application?
I would like to put some asserts in my model code that asserts that only one thread ( eg the ui thread) accesses my state, to assure that no kind of synchronization is necessary.
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AngularJS UI Router - change url without reloading state
Currently our project is using default $routeProvider , and I am using this "hack", to change url without reloading page:
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Should IBOutlets be strong or weak under ARC?
...ple is for IBOutlets to be strong unless weak is specifically needed to avoid a retain cycle. As Johannes mentioned above, this was commented on in the "Implementing UI Designs in Interface Builder" session from WWDC 2015 where an Apple Engineer said:
And the last option I want to point out is t...
List all sequences in a Postgres db 8.1 with SQL
...class c WHERE c.relkind = 'S';
Typically a sequence is named as ${table}_id_seq. Simple regex pattern matching will give you the table name.
To get last value of a sequence use the following query:
SELECT last_value FROM test_id_seq;
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