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Unexpected results when working with very big integers on interpreted languages
...83,647), Node.js and PHP switch to a floating point representation and you start getting round-off errors. A language like Go will probably try to stick with an integer form (e.g., 64-bit integers) as long as possible (if, indeed, it didn't start with that). Since the answer fits in a 64-bit integer...
React.js - input losing focus when rerendering
...t;
</Container>
)
}
}
So, the problem is that I always start coding everything at one place to quickly test and later break it all into separate modules.
But, here this strategy backfires because updating the state on input change triggers render function and the focus is lost.
...
The calling thread cannot access this object because a different thread owns it
...
This is a common problem with people getting started. Whenever you update your UI elements from a thread other than the main thread, you need to use:
this.Dispatcher.Invoke(() =>
{
...// your code here.
});
You can also use control.Dispatcher.CheckAccess() to ...
In Firebase, is there a way to get the number of children of a node without loading all the node dat
...ta.numChildren());
});
You can read the Documentation to know how to Get Started with Cloud Functions.
Also, another example of counting posts is here:
https://github.com/firebase/functions-samples/blob/master/child-count/functions/index.js
Update January 2018
The firebase docs have changed so ...
What's the difference between an element and a node in XML?
...pes" chapter.
An XML element is everything from (including) the element's start tag to (including) the element's end tag.
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Replace all elements of Python NumPy Array that are greater than some value
...at, you can use the third part of the slice, which is usually neglected: a[start:stop:step] gives you the elements of the array from start to stop, but instead of every element, it takes only every step (if neglected, it is 1 by default). So to set all the evens to zero, you could do a[::2] = 0
...
How do I create a new GitHub repo from a branch in an existing repo?
...
I started with @user292677's idea, and refined it to solve my problem:
Create the new-repo in github.
cd to your local copy of the old repo you want to extract from, which is set up to track the new-project branch that will b...
How to update two tables in one statement in SQL Server 2005?
...RE T1.id = T2.id
and T1.id = '011008';
UPDATE Table2
SET Table2.WAprrs = 'start,stop'
FROM Table1 T1, Table2 T2
WHERE T1.id = T2.id
and T1.id = '011008';
COMMIT;
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The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead [dupl
...at is throwing these deprecation errors then you can almost certainly just start using them right away—i.e. without any installation effort.
They differ slightly, but offer a number of advantages over the old extension including API support for transactions, stored procedures and prepared stateme...
Custom fonts in iOS 7
...rting Files.
Finally, you would like to list all your fonts when the app starts just to see useable name for your font. You will do that with this little piece of code:
NSArray *fontFamilies = [UIFont familyNames];
for (int i = 0; i < [fontFamilies count]; i++)
{
NSString *fontFamily = [fo...