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Raw loops vs. STL algorithms. Published at 10:46 by Jens Weller. Since last week I am working on my CMS for static HTML pages again, and so the series about Building applications with Qt and boost continues. May 21, 2018 Organic Techno stretches from music/synth loops, big subsynth basslines, driving teched-up and dubby beats, analog kick-free tops and percussive loops, trippy vox loops, bending FX and drum hits. Raw Loops Organic Techno Samples-Loops WAV. Bass Loops â 22 super-low sub rattlers. Music Loops â 29 techno hooks and stabs. Download Dub House by RAW LOOPS on Beatport Sounds. Pack Summary. 330 MBs of dubbed-out and spacey house loops. Dub House present a flavor combination of Rasta house vibes, hip hop break swings, and minimal tech house. Buy & Download Royalty Free sounds, loops and sample packs. Read Tutorials on music production. House / Techno / Deep House / Tech House / Minimal. No raw loops 1 â functions. Loop over all the elements in a container and call a function with each element as an argument. In this talk at Going Native 2013 Sean Parent argues that a goal for better code should be âno raw loopsâ. He talks about a number of problems with raw loops, and a number of ways to address those problems.
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A few years ago Sean Parent presented his famous C++ Seasoning talk, where he recommended avoiding raw for loop and using STL algorithms instead.
This made a lot of people sensitive to this topic, and encouraged us to think about how to convert the for loops in our code into more declarative constructs.
Recently I encountered a very simple for loop, but that I couldnât see how to replace with an STL algorithm. Letâs see more modern techniques we can use to transform this for loop into declarative code.
The loopExample 1![]()
Consider this structure
P :
We have a collection of zero-initialised
P s:
And a collection of values for
x :
Weâd like to set each of the
x in the collection of P with its counterpart in xs .
Here is how to do it with a for loop:
Now if
x was a private member in P , and we could set it by using a setter setX , then the for loop would look like that:
Weâd like to fill the values of this map with the values in this vector:
Then the for loop to do this is not as straightforward as the one in Example 1, because the map cannot be accessed with an index:
This seems to work. But to call the
setX member function, I donât think this is possible with ranges. If you see how to do it, please leave a comment.
Example 2
With a map, the expression is more verbose. Malwarebytes premium 3.0.2.422. We can emulate the range adaptor coming in C++20 that is called
values :
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