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What are the differences between double-dot “..” and triple-dot “…” in Git commit ranges?

...t can be written as "r1..r2". A similar notation "r1...r2" is called symmetric difference of r1 and r2 and is defined as "r1 r2 --not $(git merge-base --all r1 r2)". It is the set of commits that are reachable from either one of r1 or r2 but not from both. Which basical...
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Under what circumstances are linked lists useful?

...he new Thread Pool, (with the local "queues" implemented as stacks, essentially). (The other main supporting structure being ConcurrentQueue<T>.) The new Thread Pool in turn provides the basis for the work scheduling of the new Task Parallel Library. So they can certainly be useful - a link...
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In Python, how to display current time in readable format

...e.g., -0400. %Z gives you current timezone name (or abbreviation) automatically. Python doesn't support %l, you could use %I instead. – jfs Dec 14 '13 at 19:30 ...
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Mimicking sets in JavaScript?

...the list is a little safer with this: if (Object.prototype.hasOwnProperty.call(obj, A)) // put code here } because of potential conflict between built-in methods and/or properties on the base Object like the constructor property. Sidebar on ES6: The current working version of ECMAScript 6 or s...
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Table Header Views in StoryBoards

...when I had moved the view out of the regular hierarchy first; I dragged it all the way to the bottom of the outline for that scene. Then, in a 2nd step, I could move it onto the table view. – Daniel Schneller Sep 23 '13 at 20:00 ...
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Sass Variable in CSS calc() function

...rd before without a definition or any pretense does not aid in creating an all inclusive answer. That link is certainly helpful though. Would have been nice to see that on the accepted answer. – Jacques Mathieu Aug 31 '19 at 18:48 ...
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Undefined symbols for architecture armv7

... header and do not link against the correct library. This is common, especially for headers for libraries like QuartzCore since it is not included in projects by default. To resolve: Add the correct libraries in the Link Binary With Libraries section of the Build Phases. If you want to add a libra...
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What is the best way to compute trending topics or tags?

... This problem calls for a z-score or standard score, which will take into account the historical average, as other people have mention, but also the standard deviation of this historical data, making it more robust than just using the avera...
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What is the difference between a mutable and immutable string in C#?

...pe To "effect a change" on a string represented as a C# String, you actually create a new String object. The original String is not changed ... because it is unchangeable. In most cases it is better to use String because it is easier reason about them; e.g. you don't need to consider the possib...
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Correct owner/group/permissions for Apache 2 site files/folders under Mac OS X?

...go-rwx DIR (nobody other than owner can access content) chmod go+x DIR (to allow "users" including _www to "enter" the dir) sudo chgrp -R _www ~/my/web/root (all web content is now group _www) chmod -R go-rwx ~/my/web/root (nobody other than owner can access web content) chmod -R g+rx ~/my/web/root...