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What is the motivation for bringing Symbols to ES6?
As you may know they are planning to include new Symbol primitive type in ECMAScript 6 (not to mention some other crazy stuff). I always thought that the :symbol notion in Ruby is needless; we could easily use plain strings instead, like we do in JavaScript. And now they decide to complicate thi...
When is a language considered a scripting language? [closed]
What makes a language a scripting language? I've heard some people say "when it gets interpreted instead of compiled". That would make PHP (for example) a scripting language. Is that the only criterion? Or are there other criteria?
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Choice between vector::resize() and vector::reserve()
....will insert given number of elements to the vector" - only true the first time it's used - it generally inserts the difference between the requested number and the pre-existing size(). "The reserve() method only allocates memory" - it may or may not allocate memory depending on whether capacity() ...
Merge, update, and pull Git branches without using checkouts
I work on a project that has 2 branches, A and B. I typically work on branch A, and merge stuff from branch B. For the merging, I would typically do:
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Is unsigned integer subtraction defined behavior?
I have come across code from someone who appears to believe there is a problem subtracting an unsigned integer from another integer of the same type when the result would be negative. So that code like this would be incorrect even if it happens to work on most architectures.
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Named Branches vs Multiple Repositories
...al only branch. Useful when cloning the repo is associated with high costs(time/space).
– Johannes Rudolph
Sep 27 '09 at 6:19
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Why does direction of index matter in MongoDB?
...ntially in the correct order.
Finding a record in a BTree takes O(Log(n)) time. Finding a range of records in order is only OLog(n) + k where k is the number of records to return.
If the records are out of order, the cost could be as high as OLog(n) * k
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Microsoft Roslyn vs. CodeDom
...s. So, the compiler APIs are rich enough to build the Visual Studio design-time tools, like IntelliSense and the Extract Method refactoring. Also, at layers above the compiler, Roslyn offers services for higher-level analysis or data transformation. For example, there are services for formatting cod...
Traits in PHP – any real world examples/best practices? [closed]
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I guess one would have to look into languages that have Traits for some time now to learn the accepted Good/Best practices. My current opinion on Trait is that you should only use them for code that you would have to duplicate in other classes that share the same functionality.
Example for a Lo...
Rails 4 multiple image or file upload using carrierwave
...n rails 4.
For edit an attachment we cant modify all the attachments at a time. so we will replace attachment one by one, or you can modify as per your rule, Here I just show you how to update any attachment.
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