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What is the fastest way to get the value of π?
...ill be an approximation of π. I'm not sure what "close enough" means, but from my tests, one iteration got 2 digits, two got 7, and three had 15, of course this is with doubles, so it might have an error based on its representation and the true calculation could be more accurate.
let pi_2 iters =
...
Jackson overcoming underscores in favor of camel-case
I retrieve a JSON string from internet; like most JSON I've seen it includes long keys that are separated by underscores. Essentially, my goal is to deserialize JSON into java-objects, but I don't use underscores in java-code.
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Check for array not empty: any?
...
>> [nil, 1].any?
=> true
>> [nil, nil].any?
=> false
From the documentation:
If the block is not given, Ruby adds
an implicit block of {|obj| obj} (that
is any? will return true if at least
one of the collection members is not
false or nil).
...
Check if object is a jQuery object
... I have $ in my current namespace pointing to jQuery2 and I have an object from outer namespace (where $ is jQuery1) than I have no way to use instanceof for checking if this object is a jQuery object.
– Georgii Ivankin
Apr 11 '14 at 4:00
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Would it be beneficial to begin using instancetype instead of id?
...Data: there. Other examples exist, such as length, which returns a CGFloat from UILayoutSupport but a NSUInteger from NSString.)
Note: Since I wrote this, the macOS headers have been modified to return a NSFileHandle instead of an id.
For initializers, it's more complicated. When you type this:
-...
How to let PHP to create subdomain automatically for each user?
...but there are thousands of tutorials out there. Here is the necessary code from that tutorial:
<VirtualHost 111.22.33.55>
DocumentRoot /www/subdomain
ServerName www.domain.tld
ServerAlias *.domain.tld
</VirtualHost>
However as it required the use of VirtualHosts it must be...
C++ : why bool is 8 bits long?
...processors, addressing a "byte" anyhow ends-up fetching more than a "byte" from external memory: this is due to efficiency reasons.
– jldupont
Jan 14 '10 at 14:34
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How to discard all changes made to a branch?
...f a specific branch to be equal with the master branch. To do so, run this from within the specific branch, and then delete the [branch name].diff file when done using git rm [branch name].diff
– karolus
May 8 at 12:37
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Choosing Java vs Python on Google App Engine
... code in the user's browser, Java's GWT (generating the Javascript for you from your Java-level coding) is far richer and more advanced than Python-side alternatives (in practice, if you choose Python, you'll be writing some JS yourself for this purpose, while if you choose Java GWT is a usable alte...
Showing a Spring transaction in log
...ve JpaTransactionManager and I wanna monitor when a connection is borrowed from pool and when it was release for a specific transaction.
– Ali
Jun 4 '13 at 18:31
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