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Downcasting in Java
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Downcasting is allowed when there is a possibility that it succeeds at run time:
Object o = getSomeObject(),
String s = (String) o; // this is allowed because o could reference a String
In some cases this will not succeed:
Object o = new Object();
String s = (String) ...
List comprehension vs. lambda + filter
...d myself having a basic filtering need: I have a list and I have to filter it by an attribute of the items.
14 Answers
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Inspect element that only appear when other element is mouse overed/entered
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It's fairly easy in Chrome 38.0.2094.0.
Here's what it'll look like:
Step-by-step:
Open the DevTools in the Sources panel
Make the tooltip appear by hovering over the button
Press F8 to freeze the page
Switch to the Elem...
Why does Lua have no “continue” statement?
I have been dealing a lot with Lua in the past few months, and I really like most of the features but I'm still missing something among those:
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Can't import my own modules in Python
...d time understanding how module importing works in Python (I've never done it in any other language before either).
9 Answe...
Message Queue vs. Web Services? [closed]
Under what conditions would one favor apps talking via a message queue instead of via web services (I just mean XML or JSON or YAML or whatever over HTTP here, not any particular type)?
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Does Java have a using statement?
...follow
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edited Jun 3 '16 at 15:26
answered Jan 6 '10 at 21:17
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Where is Python's sys.path initialized from?
Where is Python's sys.path initialized from?
2 Answers
2
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Best way to extract a subvector from a vector?
Suppose I have a std::vector (let's call it myVec ) of size N . What's the simplest way to construct a new vector consisting of a copy of elements X through Y, where 0
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Is it possible to search for a particular filename on GitHub?
I know that the GitHub web interface lets you search all repositories for files with a particular pathname (e.g. searching for path:/app/models/user.rb yields >109k results), but is there a way to search all repositories for filenames independent of their subdirectory location? I tried using as...