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How to get the current date and time
... From Date doc: As of JDK 1.1, the Calendar class should be used to convert between dates and time fields and the DateFormat class should be used to format and parse date strings.
– Paolo M
Aug 7 '13 at 14:06
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How can I initialize an ArrayList with all zeroes in Java?
...mber of elements it can hold before it needs to resize its internal array (and has nothing to do with the initial number of elements in the list).
To initialize an list with 60 zeros you do:
List<Integer> list = new ArrayList<Integer>(Collections.nCopies(60, 0));
If you want to cre...
How does Hadoop process records split across block boundaries?
...nteresting question, I spent some time looking at the code for the details and here are my thoughts. The splits are handled by the client by InputFormat.getSplits, so a look at FileInputFormat gives the following info:
For each input file, get the file length, the block size and calculate the spli...
Rails - link_to helper with data-* attribute [duplicate]
...oo-bar' => 'that' }
Update: In Rails 4, underscores are automatically converted to dashes, so you can do this:
:data => { :foo_bar => 'that' }
Alternatively you can just write it directly:
= link_to body, url, :'data-foo' => 'bar', :'data-this' => 'that'
Update 2: As pointed o...
php create object without class [duplicate]
...ay into a nested stdClass object. If you use (object) $array it will only convert the first layer into an object, everything nested inside that will remain an array.
– David Routen
Mar 2 '18 at 20:29
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Difference between Array and List in scala
In what cases I should use Array(Buffer) and List(Buffer). Only one difference that I know is that arrays are nonvariant and lists are covariant. But what about performance and some other characteristics?
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Spring DAO vs Spring ORM vs Spring JDBC
I was going through data access technologies supported by Spring, and I noticed that it mentions multiple options and I am not sure about the difference among them:
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How to get start and end of day in Javascript?
...1:49:00.304Z" *
* it is applicable for Instant time type on Java8 which convert your local time automatically depending on your region.(if you are planning write global app)
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Finding differences between elements of a list
...cess is a method call in python
numpy.diff is slow because it has to first convert the list to a ndarray. Obviously if you start with an ndarray it will be much faster:
In [22]: arr = np.array(L)
In [23]: %timeit np.diff(arr)
100 loops, best of 3: 3.02 ms per loop
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How do I do multiple CASE WHEN conditions using SQL Server 2008?
...s a combination of the first two, with the outer case being the first type and the inner case being the second type.
– flygoing
Sep 19 '17 at 14:01
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