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Difference between add(), replace(), and addToBackStack()

...k. 2) fragmentTransaction.replace(int containerViewId, Fragment fragment, String tag) Description - Replace an existing fragment that was added to a container. This is essentially the same as calling remove(Fragment) for all currently added fragments that were added with the same containerViewId a...
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How exactly does the android:onClick XML attribute differ from setOnClickListener?

...+ "be used within a restricted context"); } final String handlerName = a.getString(attr); if (handlerName != null) { setOnClickListener(new OnClickListener() { private Method mHandler; public void onClick(V...
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How to paginate with Mongoose in Node.js?

...this case, you can add the query page and/ or limit to your URL as a query string. For example: ?page=0&limit=25 // this would be added onto your URL: http:localhost:5000?page=0&limit=25 Since it would be a String we need to convert it to a Number for our calculations. Let's do it using...
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Clearing NSUserDefaults

...Defaults] to store application settings. This consists of roughly a dozen string values. Is it possible to delete these values permanently instead of just setting them to a default value? ...
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Where is the C auto keyword used?

...llege days I read about the auto keyword and in the course of time I actually forgot what it is. It is defined as: 9 Ans...
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Sign APK without putting keystore info in build.gradle

... gradle scripts: /* Get password from Mac OSX Keychain */ def getPassword(String currentUser, String keyChain) { def stdout = new ByteArrayOutputStream() def stderr = new ByteArrayOutputStream() exec { commandLine 'security', '-q', 'find-generic-password', '-a', currentUser, '-g...
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Difference between LoadFile and LoadFrom with .NET Assemblies?

... Why do you check two string references for value equality with string.Compare(x, y) == 0? I think you want x == y there? If for obscure reasons you do want culture-dependent equality check, it is more clear to write string.Equals(x, y, StringComp...
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Convert one date format into another in PHP

...o be a proper timestamp (seconds since January 1, 1970). You are passing a string, which date() can't recognize. You can use strtotime() to convert a date string into a timestamp. However, even strtotime() doesn't recognize the y-m-d-h-i-s format. PHP 5.3 and up Use DateTime::createFromFormat. It...
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Reducing Django Memory Usage. Low hanging fruit?

...) Then point your browser at http://domain/_dozer/index to see a list of all your memory allocations. I'll also just add my voice of support for mod_wsgi. It makes a world of difference in terms of performance and memory usage over mod_python. Graham Dumpleton's support for mod_wsgi is outstand...
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What is the rationale behind having companion objects in Scala?

...xample. abstract class AnimalCounter { var animals = 0 def name: String def count() { animals += 1 println("%d %ss created so far".format(animals, name)) } } abstract class Animal { def companion: AnimalCounter companion.count() } object Dog extends A...