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Android: How can I get the current foreground activity (from a service)?
... the service call an event method on that callback/listener object
Send an ordered broadcast Intent to the activity, with a low-priority BroadcastReceiver as backup (to raise a Notification if the activity is not on-screen) -- here is a blog post with more on this pattern
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Using Linq to get the last N elements of a collection?
....Skip(Math.Max(0, collection.Count() - N));
This approach preserves item order without a dependency on any sorting, and has broad compatibility across several LINQ providers.
It is important to take care not to call Skip with a negative number. Some providers, such as the Entity Framework, will p...
What does O(log n) mean exactly?
...rinter's office, and our phone book had all its pages inserted in a random order. Fix the ordering so that it's correct by looking at the first name on each page and then putting that page in the appropriate spot in a new, empty phone book.
For the below examples, we're now at the printer's office...
Storing time-series data, relational or non?
...has to handle ~3 million measures with a 1 minute frequency? How would you order the PK for such a table? Wouldn't Device, Metric, DateTime create fragmentation and force the RDBMS to lots of page split? Instead putting DateTime first would reduce fragmentation (I'm assuming time ordered inserts) bu...
What are Maven goals and phases and what is their difference?
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Goals are executed in phases which help determine the order goals get executed in. The best understanding of this is to look at the default Maven lifecycle bindings which shows which goals get run in which phases by default. The compile phase goals will always be executed befo...
What is this weird colon-member (“ : ”) syntax in the constructor?
...re also a bunch of other reasons for using init lists. especially when the order of initialisation matters. It's a shame it has such a stupid fake function call syntax.
– Martin Beckett
Nov 10 '09 at 23:50
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JavaScript for…in vs for
...u use for in to loop over property names in an object, the results are not ordered. Worse: You might get unexpected results; it includes members inherited from the prototype chain and the name of methods.
Everything but the properties can be filtered out with .hasOwnProperty. This code sample does ...
Shuffle an array with python, randomize array item order with python
What's the easiest way to shuffle an array with python?
11 Answers
11
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scanf() leaves the new line char in the buffer
...scanf terminology) other than conversions, like the literal text in scanf("order = %d", &order); doesn't skip whitespace either. The literal order has to match the next character to be read.
So you probably want " order = %d" there if you want to skip a newline from the previous line but still...
How to move an iFrame in the DOM without losing its state?
...The basic idea is to create a flex-box wrapper and then define an specific order for the iframes using the order attribute on each iframe wrapper.
<style>
.container{
display: flex;
flex-direction: column;
}
</style>
<div class="container">
<div id="wrap1" style="...