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Efficiently updating database using SQLAlchemy ORM
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SQLAlchemy's ORM is meant to be used together with the SQL layer, not hide it. But you do have to keep one or two things in mind when using the ORM and plain SQL in the same transaction. Basically, from one side, ORM data modifications will only hit the database when you flush the changes from y...
When to use std::forward to forward arguments?
...re than once however, because that usually does not make sense: Forwarding means that you're potentially moving the argument all the way through to the final caller, and once it's moved it's gone, so you cannot then use it again (in the way you probably meant to).
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Syntax behind sorted(key=lambda: …)
... function to accomplish this comes in two parts.
Using lamba ultimately means you don't have to write (define) an entire function, like the one sblom provided an example of. Lambda functions are created, used, and immediately destroyed - so they don't funk up your code with more code that will on...
What is an invariant?
...ms to get used in a number of contexts. The best I can figure is that they mean a variable that can't change. Isn't that what constants/finals (darn you Java!) are for?
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Google Analytics - Failed to load resource: http://www.google-analytics.com/ga.js
...licitly use https:// instead of the protocol-relative URL by default. This means changing
'//www.google-analytics.com/analytics.js'
into
'https://www.google-analytics.com/analytics.js'
Example:
<script>
(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
(i[...
Is “inline” without “static” or “extern” ever useful in C99?
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Does this mean I write inline void f() {} in the header and extern inline void f(); in the .c file? So the actual function definition goes in the header and the .c file contains a mere declaration in this case, in reversal of the usua...
Can someone explain the dollar sign in Javascript?
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A '$' in a variable means nothing special to the interpreter, much like an underscore.
From what I've seen, many people using jQuery (which is what your example code looks like to me) tend to prefix variables that contain a jQuery object with a...
Should operator
... "not a core functionality of your class." That's what "friend" means. If it were core functionality, it would be in the class, not a friend.
– xaxxon
Jul 19 '16 at 7:14
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Getting an object from an NSSet
... think hash needs to be implemented; it would just go a lot faster if you did do that.
– fumoboy007
Aug 11 '13 at 22:17
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How to change the DataTable Column Name?
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I just tried this solution now and it works fine - it did not do any changes or wipe out the underlying column data. Maybe something else is happening in your code...
– AshesToAshes
Aug 15 '13 at 15:25
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