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POParallel javascript (River Trail) combine is not a function
 

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  1. POParallel javascript (River Trail) combine is not a function
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    <p>I'm experimenting with <a href="https://github.com/RiverTrail/RiverTrail/wiki" rel="nofollow">Intel's River Trail project</a>. I installed the Firefox extension (FFv19.02). I also installed openCL for Windows. All the API methods seem to be working (map, reduce, scan, scatter, flatten, partition) , except the 'combine' method:</p> <pre><code>var par_A = new ParallelArray([3,3], function(i,j) {return j}); console.log( par_A.combine(function(i) {return this.get(i) + 1} ) ); </code></pre> <p>I get: </p> <pre><code>TypeError: par_A.combine is not a function </code></pre> <p>Any idea what the problem might be ?</p> <p><strong>UPDATE:</strong></p> <p>So the above example makes no sense because you can't iterate over a 2D array with one combine. To simplify, let's take just a 1D example:</p> <pre><code>var par_A = new ParallelArray([1,2,3,4,5]); console.log( par_A.combine(function(i) {return this.get(i) + 1} ) ); </code></pre> <p>As stated bellow, there are two API methods, the one <a href="https://github.com/rivertrail/rivertrail/wiki/ParallelArray" rel="nofollow">proposed by Intel</a>, and the <a href="http://wiki.ecmascript.org/doku.php?id=strawman%3adata_parallelism" rel="nofollow">ECMAscript draft</a>. The ECMAscript draft has no 'combine' method, but passes the index, as a second parameter to the 'map'. The equivalent of the above would be:</p> <pre><code>var par_A = new ParallelArray([1,2,3.4.5]); console.log( par_A.map(function(v, i) {return this.get(i) + 1} ) ); </code></pre>
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    1. CODoes "combineSeq" work? There's a cryptic note in the API about it, but I'm not sure what it means as I'm almost completely unfamiliar with the project.
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    2. CO@Pointy Nope, tried that as well before posting the question. Thanks though!
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