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Insert line after first match using sed
...he first line matched. Especially handy if you're adding a line that comes from a variable where you'd otherwise have to escape everything first using ${var//} before, or another sed statement etc.
This solution is a little less messy in scripts (that quoting and \n is not easy to read though), whe...
How to identify CAAnimation within the animationDidStop delegate?
...
To make explicit what's implied from above (and what brought me here after a few wasted hours): don't expect to see the original animation object that you allocated passed back to you by
- (void)animationDidStop:(CAAnimation*)animation finished:(BOOL)flag...
Where can I get a “useful” C++ binary search algorithm?
... return first != last && !comp(value, *first) ? first : last;
}
From https://en.cppreference.com/w/cpp/algorithm/lower_bound
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wpf: how to show tooltip when button disabled by command?
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It ensures that for any class inheriting from Control, tooltips are shown even if Control instance is disabled
– sacha barber
Jan 22 '19 at 18:24
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Why do I need to do `--set-upstream` all the time?
... It does, but then when you try to pull you'll have to specify from where. The -u sets up the branch tracking between origin and your local repo.
– Zamith
May 29 '17 at 15:02
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Is there a simple, elegant way to define singletons? [duplicate]
...nly the `self` argument. Also, the decorated class cannot be
inherited from. Other than that, there are no restrictions that apply
to the decorated class.
To get the singleton instance, use the `instance` method. Trying
to use `__call__` will result in a `TypeError` being raised.
...
How to make an AJAX call without jQuery?
...) method allow you to make web requests.
For example, to request some json from /get-data:
var opts = {
method: 'GET',
headers: {}
};
fetch('/get-data', opts).then(function (response) {
return response.json();
})
.then(function (body) {
//doSomething with body;
});
See here for more...
Why does String.split need pipe delimiter to be escaped?
...escape. Now that I know why it's that way, it will surely help me remember from now on.
– sufinawaz
Nov 3 '14 at 21:10
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How to test if a string is basically an integer in quotes using Ruby
...=~ /\A[-+]?[0-9]+\z/)
end
end
An edited version according to comment from @wich:
class String
def is_i?
/\A[-+]?\d+\z/ === self
end
end
In case you only need to check positive numbers
if !/\A\d+\z/.match(string_to_check)
#Is not a positive number
else
#Is al...
Using C# reflection to call a constructor
... if that's too much of a challenge then you should really really stay away from reflection.
– Jon Skeet
Mar 7 '13 at 6:48
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