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Uses for Optional
...atches use case #1 in the OP's question. Although, absence of a value is a more precise formulation than null since something like IntStream.findFirst could never return null.
For use case #2, passing an optional argument to a method, this could be made to work, but it's rather clumsy. Suppose you ...
How to remove all debug logging calls before building the release version of an Android app?
...Timber.e(ioe, "Bad things happened!");
}
See the Timber sample app for a more advanced example, where all log statements are sent to logcat during development and, in production, no debug statements are logged, but errors are silently reported to Crashlytics.
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How do I import a Swift file from another Swift file?
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This needs more upvotes. The answers advising to just add the .swift file to the test target are not exactly wrong, but it's not the way it should be done
– below
Jun 21 '14 at 22:43
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How to remove focus border (outline) around text/input boxes? (Chrome) [duplicate]
...If anything, the highlighting of the element should be enhanced to make it more obvious which item has focus.
– Torkil Johnsen
Jul 25 '14 at 12:46
38
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How to resolve git stash conflict without commit?
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This is so much more clear than many blog posts I've read on this topic.
– coder_tim
Aug 21 at 17:57
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Hidden Features of Visual Studio (2005-2010)?
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95
votes
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How to find index of all occurrences of element in array?
...TE: As per VisioN's comment, a simple for loop would get the same job done more efficiently, and it is easier to understand and therefore easier to maintain:
function getAllIndexes(arr, val) {
var indexes = [], i;
for(i = 0; i < arr.length; i++)
if (arr[i] === val)
ind...
The 'Access-Control-Allow-Origin' header contains multiple values
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How to find all occurrences of a substring?
...n string function that does what you're looking for, but you could use the more powerful regular expressions:
import re
[m.start() for m in re.finditer('test', 'test test test test')]
#[0, 5, 10, 15]
If you want to find overlapping matches, lookahead will do that:
[m.start() for m in re.finditer...