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Remove Elements from a HashSet while Iterating [duplicate]

So, if I try to remove elements from a Java HashSet while iterating, I get a ConcurrentModificationException . What is the best way to remove a subset of the elements from a HashSet as in the following example? ...
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Find the number of downloads for a particular app in apple appstore [closed]

...ed to do a market research on specific type of apps. so is there a way for me to know the download count of the app / any app. ...
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In a PHP project, what patterns exist to store, access and organize helper objects? [closed]

... I would avoid the Singleton approach suggested by Flavius. There are numerous reasons to avoid this approach. It violates good OOP principles. The google testing blog has some good articles on the Singleton and how to avoid it: http://googletesting.blogspot.com/2008/08/by-miko-hevery-so-you-joi...
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MySQL selecting yesterday's date

...ow can I display and count the values whose dates are yesterday? I used time() to insert date in the database. Example: 8...
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How to do URL decoding in Java?

...SCII. The string you have there is URL encoded. This kind of encoding is something entirely different than character encoding. Try something like this: try { String result = java.net.URLDecoder.decode(url, StandardCharsets.UTF_8.name()); } catch (UnsupportedEncodingException e) { // not go...
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Func vs. Action vs. Predicate [duplicate]

With real examples and their use, can someone please help me understand: 3 Answers 3 ...
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URL to load resources from the classpath in Java

In Java, you can load all kinds of resources using the same API but with different URL protocols: 14 Answers ...
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One-liner to check whether an iterator yields at least one element?

... any won't go beyond the first element if it's True. In case the iterator yields something false-ish you can write any(True for _ in iterator). share | impro...
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How do you create different variable names while in a loop? [duplicate]

...ring7': 'Hello', 'string8': 'Hello', 'string9': 'Hello'} I said this somewhat tongue in check, but really the best way to associate one value with another value is a dictionary. That is what it was designed for! shar...
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angularjs newline filter with no other html

...y kind of processing. All you have to do is display the text within an element that has this CSS: <p style="white-space: pre;">{{ MyMultiLineText}}</p> This will parse and display \n as new lines. Works great for me. Here, a jsFiddle example. ...