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Use of “instanceof” in Java [duplicate]
...hat Java has the instanceof operator. Can you elaborate where it is used and what are its advantages?
4 Answers
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HTTP test server accepting GET/POST requests
...ve test server that accepts my requests for basic information via HTTP GET and also allows me to POST (even if it's really not doing anything). This is entirely for test purposes.
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Replacement for Google Code Search? [closed]
...h API corresponds to the functionality you want (it's a great resource for Android in particular -- give it some of the text you see on screen, and it'll usually find the implementing class).
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How to get JS variable to retain value after page refresh? [duplicate]
...o permanently change a javascript variable? As in, if I set the variable X and make that equal to 1. Then onClick of a button change that variable to 2. How can I get that variable to stay at 2 on refresh of the page?
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How to find out which fonts are referenced and which are embedded in a PDF document
...I'd like to inspect, which fonts are actually embedded in the pdf document and which are only referenced. Is there an easy (and cheap as in free) way to do that?
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Value Change Listener to JTextField
... good format for the warning/type cast. Same pattern will be useful for handling double amounts (sales figures/prices entered or displayed)
– Max West
Oct 13 '14 at 14:31
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How to find a deleted file in the project commit history?
...ch touched that file. Then, you can find the version of the file you want, and display it with...
git show <SHA> -- <path-to-file>
Or restore it into your working copy with:
git checkout <SHA>^ -- <path-to-file>
Note the caret symbol (^), which gets the checkout prior to...
How do I get elapsed time in milliseconds in Ruby?
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add a to_i and you have it as an integer, eg: ((finish - start) * 1000.0).to_i
– Travis Reeder
Dec 8 '10 at 6:14
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Can't operator == be applied to generic types in C#?
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"...by default == behaves as described above for both predefined and user-defined reference types."
Type T is not necessarily a reference type, so the compiler can't make that assumption.
However, this will compile because it is more explicit:
bool Compare<T>(T x, T y) where T...
Does MySQL ignore null values on unique constraints?
...sult:
x
NULL
NULL
1
This is not true for all databases. SQL Server 2005 and older, for example, only allows a single NULL value in a column that has a unique constraint.
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