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Copy a stream to avoid “stream has already been operated upon or closed”
I'd like to duplicate a Java 8 stream so that I can deal with it twice. I can collect as a list and get new streams from that;
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Shell one liner to prepend to a file
... more popular and more time passed, outraged people started reporting that it sorta worked but weird things could happen, or it just didn't work at all, so it was furiously downvoted for a time. Such fun.
The solution exploits the exact implementation of file descriptors on your system and, becaus...
When should I use jQuery's document.ready function?
...cess a dom element (an anchor, an img etc), you will not be able to access it because html is interpreted from top to bottom and your html elements are not present when your jQuery code runs.
To overcome this problem, we place every jQuery/javascript code (which uses DOM) inside $(document).ready f...
What's the best three-way merge tool? [closed]
Subversion, Git, Mercurial and others support three-way merges (combining mine, theirs, and the "base" revision) and support graphical tools to resolve conflicts.
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Should I use single or double colon notation for pseudo-elements?
... support the single-colon notation (e.g. :after ) for backwards compatibility, should I use solely the single-colon notation and when IE8's market share drops to a negligible level go back and find/replace in my code base? Or should I include both:
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How do I “decompile” Java class files? [closed]
... can I use to decompile a class file? Will I actually get Java code, or is it just JVM assembly code?
19 Answers
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Why use a prime number in hashCode?
...rge enough prime that the number of buckets is unlikely to be divisible by it (and in fact, modern java HashMap implementations keep the number of buckets to a power of 2).
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Check if a div exists with jquery [duplicate]
Yes, I know this has been asked a lot.
But, it confuses me, since the results on google for this search show different methods (listed below)
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The name 'InitializeComponent' does not exist in the current context
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I've encountered this a couple times and keep forgetting what causes it.
I ran into this when I renamed the namespace on my code behind file but not in my XAML.
So check if you've done the same.
The namespace and class names need to match since they are both part of a partial class
namesp...
Counting the number of True Booleans in a Python List
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This is actually more efficient than sum, as well as being more explicit about the intent, so there's no reason to use sum:
In [1]: import random
In [2]: x = [random.choice([True, False]) for i in range(100)]
In [3]: %timeit x.count(True)
970 ns ± 41.1 ns per loop (mean ± std. dev. of 7 ru...