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What is std::promise?

I'm fairly familiar with C++11's std::thread , std::async and std::future components (e.g. see this answer ), which are straight-forward. ...
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HTML select form with option to enter custom value

... a text input and a datalist. Then you add a list attribute to the input, with a value of the id of the datalist. Update: As of March 2019 all major browsers (now including Safari 12.1 and iOS Safari 12.3) support datalist to the level needed for this functionality. See caniuse for detailed browser...
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How can I convert a long to int in Java?

...Math.toIntExact(value); Original Answer: Simple type casting should do it: long l = 100000; int i = (int) l; Note, however, that large numbers (usually larger than 2147483647 and smaller than -2147483648) will lose some of the bits and would be represented incorrectly. For instance, 21474836...
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How to add http:// if it doesn't exist in the URL?

How can I add http:// to a URL if it doesn't already include a protocol (e.g. http:// , https:// or ftp:// )? 8 Answe...
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Comparing object properties in c# [closed]

This is what I've come up with as a method on a class inherited by many of my other classes. The idea is that it allows the simple comparison between properties of Objects of the same Type. ...
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How do I create a list of random numbers without duplicates?

... This will return a list of 10 numbers selected from the range 0 to 99, without duplicates. import random random.sample(range(100), 10) With reference to your specific code example, you probably want to read all the lines from the file once and then select random lines from the saved list in me...
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UIImage: Resize, then Crop

I've been bashing my face into this one for literally days now and even though I feel constantly that I am right on the edge of revelation, I simply cannot achieve my goal. ...
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Can Protractor and Karma be used together?

...cenario Runner for E2E testing, does that mean I will still be able to use it with Karma as my E2E testing framework ? 4 ...
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Is there a JavaScript function that can pad a string to get to a determined length?

I am in need of a JavaScript function which can take a value and pad it to a given length (I need spaces, but anything would do). I found this: ...
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Difference between binary tree and binary search tree

...se explain the difference between binary tree and binary search tree with an example ? 12 Answers ...