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Is null check needed before calling instanceof?
...ype without raising a ClassCastException. Otherwise the result is false.
API / Class#isInstance(Object)
If this Class object represents an interface, this method returns true if the class or any superclass of the specified Object argument implements this interface; it returns false otherwise. ...
How to get all Errors from ASP.Net MVC modelState?
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This works great when you are using web api and returning an IHttpActionResult result. So, you can just do: return BadRequest(messages); Thanks, Dunc!
– Rich Ward
Aug 24 '16 at 15:21
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Java ArrayList copy
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nowhere in java-api deep cloning is done by any collection class
– Vikash
May 5 '18 at 15:46
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Suppress deprecated import warning in Java
...l you the part of the code that is causing deprecation or using deprecated API. Now either you can run your code with these warnings or make appropriate changes in the code.
In my case I was using someListItem.addItem("red color") whereas the compiler wanted me to use someListItem.add("red color")...
Rails migration for change column
...name do |t|
t.change :column_name, :column_type, {options}
end
See the API documentation on the Table class for more details.
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Immutable array in Java
... @mauhiz Arrays.asList is not unmodifiable. docs.oracle.com/javase/7/docs/api/java/util/… "Returns a fixed-size list backed by the specified array. (Changes to the returned list "write through" to the array.)"
– Jason S
Nov 3 '15 at 3:39
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Extract digits from a string in Java
...e characters that are not 0-9 (see docs: download.oracle.com/javase/6/docs/api/java/lang/… )
– Sean Patrick Floyd
Oct 27 '10 at 7:58
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How can I test what my readme.md file will look like before committing to github?
...ul CLI tool for rendering GitHub flavored markdown: grip. It uses GitHub's API, thus renders quite well.
Frankly, the developer of grip, has a more elaborate answer on these very similar questions:
Is there a command line utility for rendering github flavored markdown?
What's the best way to edit...
try/catch versus throws Exception
... the exception, in the first version)
--edit--
From the point of view of API design, the methods are completely different in their contract. Also, throwing class Exception is not recommended. Try throwing something more specific to allow the caller to handle the exception better.
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Java serialization: readObject() vs. readResolve()
...ge the data that is serialized through readObject method. For e.g. xstream API uses this feature to initialize some attributes that were not in the XML to be deserialized.
http://x-stream.github.io/faq.html#Serialization
sh...