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TCP: can two different sockets share a port?
...t of available ports if you make a lot of connections in a short amount of time.
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How to access java-classes in the default-package?
...most lexically enclosing type is a member of a named package, or a compile-time error occurs.
Andreas points out in the comments:
"why is [the default package] there in the first place? design error?"
No, it's deliberate.
JLS 7.4.2. Unnamed Packages says: "Unnamed packages are provided by the J...
How do I delete specific lines in Notepad++?
... Thank you! Wow, I wasn't aware that NP++ did this.. a great time saver. Find & bookmark lines + delete lines. Awesome. Thank you!!
– Matthew M.
Dec 6 '10 at 16:26
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Cancel split window in Vim
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Press Control+w, then hit q to close each window at a time.
Update: Also consider eckes answer which may be more useful to you, involving :on (read below) if you don't want to do it one window at a time.
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Making heatmap from pandas DataFrame
I have a dataframe generated from Python's Pandas package. How can I generate heatmap using DataFrame from pandas package.
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How can I disable ARC for a single file in a project?
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No directories. Only one single file at a time in the build settings :(
– casademora
Aug 9 '11 at 15:15
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How can I use a C++ library from node.js?
How can I use a C++ library from node.js?
8 Answers
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Java array reflection: isArray vs. instanceof
...t's type before downcasting to a particular type which is known at compile time. For example, perhaps you wrote some code that can work with a Integer[] or an int[]. You'd want to guard your casts with instanceof:
if (obj instanceof Integer[]) {
Integer[] array = (Integer[]) obj;
/* Use the...
“document.getElementByClass is not a function”
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@tmeans: Yup, though that was a pretty big deal at the time this was posted.
– BoltClock♦
Jan 23 '15 at 3:25
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Regex to check whether a string contains only numbers [duplicate]
I get false on both "123" and "123f" . I would like to check if the hash only contains numbers. Did I miss something?
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