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lenses, fclabels, data-accessor - which library for structure access and mutation is better
... this representation, because the subset of 'Lens' values that satisfy the 3 laws stated in the beginning of this response are precisely those lenses for which the wrapped function is a 'comonad coalgebra' for the store comonad. This transforms 3 hairy laws for a lens l down to 2 nicely pointfree eq...
Is there a difference between single and double quotes in Java?
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Luiggi Mendoza
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answered Jan 13 '09 at 15:54
Yuval AdamYuval Adam
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How to create empty text file from a batch file?
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13 Answers
13
Active
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How is the “greater than” or “>” character used in CSS?
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203
It's a CSS child selector. P > SPAN means applying the style that follows to all SPAN tags th...
How to detect UI thread on Android?
...) {
// On UI thread.
} else {
// Not on UI thread.
}
From API level 23 and up, there's a slightly more readable approach using new helper method isCurrentThread on the main looper:
if (Looper.getMainLooper().isCurrentThread()) {
// On UI thread.
} else {
// Not on UI thread.
}
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GIT merge error “commit is not possible because you have unmerged files”
...tenjonnystoten
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2
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Show pop-ups the most elegant way
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edited Jan 17 '18 at 18:33
skeletank
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answered ...
Comparing boxed Long values 127 and 128
...val1 = 127L;
Long val2 = 127L;
System.out.println(val1 == val2);
Long val3 = 128L;
Long val4 = 128L;
System.out.println(val3 == val4);
Outputs this:
true
false
For the 127L value, since both references (val1 and val2) point to the same object instance in memory (cached), it returns true...
How to convert nanoseconds to seconds using the TimeUnit enum?
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answered May 29 '09 at 3:00
Adam RosenfieldAdam Rosenfield
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