Array.reduce not a function?
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Josh K
Sep 21, 2010, 2:18:08 PM9/21/10
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Is it, or should it be possible, to write
return v.reduce(function(p,c){ return p+c; }, 0);
in a reduce function as part of a M / R call? I know that V8 (and
Node.js) accept a reduce call, but does SpiderMonkey?
Thanks,
-Josh
return v.reduce(function(p,c){ return p+c; }, 0);
in a reduce function as part of a M / R call? I know that V8 (and
Node.js) accept a reduce call, but does SpiderMonkey?
Thanks,
-Josh
Kristina Chodorow
Sep 21, 2010, 2:31:50 PM9/21/10
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Yes, SpiderMonkey has this function, too.
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Joshua Kehn
Sep 21, 2010, 2:36:56 PM9/21/10
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From the MongoShell I can't seem to access it.
> v = [1, 2, 3]
[ 1, 2, 3 ]
> var res = v.reduce(function(p,c){ return p+c; }, 0)
Tue Sep 21 14:35:54 TypeError: v.reduce is not a function (shell):0
Something I'm doing wrong? The above code runs find under V8.
Thanks,
-Josh
Kristina Chodorow
Sep 21, 2010, 2:40:35 PM9/21/10
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What version are you running? How did you download/install it?
(From my shell:
> [1,2,3].reduce(function(p,c) { return p+c; }, 0)
6
> v = [1,2,3]
[ 1, 2, 3 ]
> v.reduce(function(p,c) { return p+c; }, 0)
6
)
(From my shell:
> [1,2,3].reduce(function(p,c) { return p+c; }, 0)
6
> v = [1,2,3]
[ 1, 2, 3 ]
> v.reduce(function(p,c) { return p+c; }, 0)
)
Joshua Kehn
Sep 21, 2010, 2:45:29 PM9/21/10
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Running 1.6.2, installed from the OS X binaries.
Thanks,
Kristina Chodorow
Sep 21, 2010, 3:41:10 PM9/21/10
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Unfortunately, it looks like the reduce function was added in SpiderMonkey 1.8 and the OS X machines are running SpiderMonkey 1.7. I think this will be resolved soon (we're going to be using a single version across all the builds), but it wouldn't hurt to file a bug if you need it.
Joshua Kehn
Sep 21, 2010, 3:45:59 PM9/21/10
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Not immediately, this is actually in relation to a question I asked on SO, fastest way to sum an array. That was given. I will just use a loop for now.
Thanks,
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