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Interfaces vs. abstract classes [duplicate]
...s. However, they are typically more flexible as a type can only be derived from one class, but can implement any number of interfaces.
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Read stream twice
... the contents of the InputStream to a byte array, and then repeatedly read from the byte array using a ByteArrayInputStream. E.g.:
ByteArrayOutputStream baos = new ByteArrayOutputStream();
org.apache.commons.io.IOUtils.copy(in, baos);
byte[] bytes = baos.toByteArray();
// either
while (needToReadA...
How can I scan barcodes on iOS?
...ation for the iPhone. It can decode QR Codes. The source code is available from the zxing project; specifically, you want to take a look at the iPhone client and the partial C++ port of the core library. The port is a little old, from circa the 0.9 release of the Java code, but should still work rea...
What are the performance characteristics of sqlite with very large database files? [closed]
...at is the approach being taken though when the sqlite db has to be rebuilt from scratch, the indexes are created after all the inserts are done.
– Snazzer
May 28 '10 at 17:22
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How is Racket different from Scheme?
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The rationale for the name-change from PLT Scheme to Racket is discussed on the Racket site.
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Clearing purchases from iOS in-app purchase sandbox for a test user
...y, in your tester@gmail.com inbox you will receive two verification emails from Apple to confirm both test accounts.
Say that you have a non-consumable with product ID @"Extra_Levels". Instead of writing @"Extra_Levels" in all methods (requestProduct, purchaseProduct, ...), just write PRODUCT_ID1 an...
RSS Feeds in ASP.NET MVC
...ou want to return rss and set the return type as RssResult. Grab the data from your model based on what you want to return.
Then any request to this action will receive rss of whatever data you choose.
That is probably the quickest and reusable way of returning rss has a response to a request in ...
What does the unary plus operator do?
...r than the operator itself. For example, it can be used to force widening from smaller integral types to int, or ensure that an expression's result is treated as an rvalue and therefore not compatible with a non-const reference parameter. I submit, however, that these uses are better suited to cod...
Why fragments, and when to use fragments instead of activities?
...le by using includes). However; fragments are wired in to the Android API, from HoneyComb, and up. Let me elaborate;
The ActionBar. If you want tabs up there to navigate your app, you quickly see that ActionBar.TabListener interface gives you a FragmentTransaction as an input argument to the onTab...
One-liner to check whether an iterator yields at least one element?
...oblem with this solution is that you can't actually use the returned value from the iterator if it's not empty, right?
– Ken Williams
Jan 3 '17 at 3:55
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