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What is meant by 'first class object'?
In a recent question , I received suggestions to talk on, amongst other things, the aspect of JavaScript where functions are 'first class' objects. What does the 'first class' mean in this context, as opposed to other objects?
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What is Persistence Context?
I am new to the Java world and JPA. I was studying JPA and came across many new terms like Entity, persistence. While reading, I could not understand the exact definition for Persistence Context .
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On Duplicate Key Update same as insert
I've searched around but didn't find if it's possible.
8 Answers
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JavaScript checking for null vs. undefined and difference between == and ===
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Unnecessary curly braces in C++?
When doing a code review for a colleague today I saw a peculiar thing. He had surrounded his new code with curly braces like this:
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What is your most productive shortcut with Vim?
I've heard a lot about Vim , both pros and cons.
It really seems you should be (as a developer) faster with Vim than with any other editor.
I'm using Vim to do some basic stuff and I'm at best 10 times less productive with Vim.
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What scalability problems have you encountered using a NoSQL data store? [closed]
NoSQL refers to non-relational data stores that break with the history of relational databases and ACID guarantees. Popular open source NoSQL data stores include:
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How to get all subsets of a set? (powerset)
Given a set
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Please explain some of Paul Graham's points on Lisp
I need some help understanding some of the points from Paul Graham’s What Made Lisp Different .
4 Answers
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Python data structure sort list alphabetically
I am a bit confused regarding data structure in python; () , [] , and {} . I am trying to sort a simple list, probably since I cannot identify the type of data I am failing to sort it.
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