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| <lamefun> | why does v8 lack documentation? |
| 07:12:55
| <lamefun> | Where is API reference? |
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| 11:26:07
| <Orion-> | hello people |
| 11:26:27
| <Orion-> | anyone care to explain how to get a NaN in V8 ? |
| 11:28:02
| <Orion-> | I'm trying,g to return an object instance in which a property may be a NaN |
| 11:29:29
| <Orion-> | WhaoOooO #v8 is not as fast as google claims it :)~ |
| 11:30:18
| <dmilith> | Orion-: how about isnan() ? |
| 11:31:12
| <Orion-> | well checking is not my primary concern here. First I'd like to make a Number that reports to be NaN in my javascript exported object |
| 11:31:46
| <dmilith> | maybe try NaN as a value? |
| 11:31:56
| <Orion-> | Doesn't compile |
| 11:32:12
| <Orion-> | It needs to be defined somewhere |
| 11:32:26
| <dmilith> | return v8::String::New("NaN"); |
| 11:32:27
| <Orion-> | And I can't see where |
| 11:32:41
| <dmilith> | try this one |
| 11:32:50
| <Orion-> | dmilith: that's what I did first but it's a String |
| 11:33:30
| <dmilith> | try switching to Number maybe |
| 11:34:08
| <Orion-> | You mean casting it to Number ? |
| 11:34:16
| <dmilith> | but theoretically there's nothing like NaN |
| 11:34:19
| <dmilith> | in Number |
| 11:35:17
| <dmilith> | a number value canot hold NaN string right? |
| 11:35:59
| <dmilith> | maybe it's just virtual call to object which contains number but also can hold a "NaN" string as a number? |
| 11:36:12
| <dmilith> | I don't know, that's how I'd do it |
| 11:36:34
| <dmilith> | and that's why isnan() will check for that value |
| 11:36:41
| <Orion-> | in javascript typeof NaN === 'number' |
| 11:36:48
| <dmilith> | yes |
| 11:36:57
| <dmilith> | that's what I'm saying. |
| 11:37:18
| <dmilith> | but in js it's something bit different |
| 11:37:25
| <dmilith> | I'm just looking on C++ side |
| 11:38:02
| <Orion-> | I think it will be very simple to someone who already did this once :) |
| 11:38:49
| <Orion-> | I did try the casting but it did not work |
| 11:39:24
| <dmilith> | casting isn't the case |
| 11:39:43
| <dmilith> | I think you should use v8 internal types for numbers |
| 11:40:18
| <Orion-> | and also v8::Value doesn't have a test for isnan() |
| 11:40:33
| <dmilith> | maybe this number boxing is reason why number operations are slow in node ;] |
| 11:41:12
| <dmilith> | IsNumber() |
| 11:41:17
| <dmilith> | look here: http://v8.googlecode.com/svn-history/r8701/branches/bleeding_edge/src/extensions/experimental/number-format.cc |
| 11:41:35
| <dmilith> | find this line: "return v8::String::New("NaN");" |
| 11:42:15
| <dmilith> | it boxes number value with whole v8 object container or sth like that (it's first time I see this ;P I'm really speculating) |
| 11:42:18
| <dmilith> | but it's logical |
| 11:44:09
| <Orion-> | It's just a String |
| 11:44:30
| <dmilith> | yes |
| 11:44:35
| <Orion-> | I mean it's not the *right* thing |
| 11:45:01
| <dmilith> | internally.. it's just a value for a object which isn't proper number |
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| 11:45:51
| <dmilith> | so object Number internally isn't holding number in such case, but still has type of number right? |
| 11:46:11
| <dmilith> | "Infinity" is internally a string too |
| 11:46:26
| <dmilith> | > 0/0 |
| 11:46:26
| <dmilith> | NaN |
| 11:46:52
| <dmilith> | in C it will throw an exception cause it cannot hold value of not a number |
| 11:47:10
| <dmilith> | in v8 it's just a value.. and it's string even in number. |
| 11:47:13
| <dmilith> | ;] |
| 11:47:14
| <dmilith> | fun |
| 11:48:58
| <dmilith> | Orion-: I suggest doing a math operations in your extension, after which just convert it to v8::Number |
| 11:49:09
| <dmilith> | and it will wrap NaN thing itself |
| 11:49:36
| <Orion-> | Like Number::New(0/0) ? |
| 11:49:38
| <dmilith> | I mean: in C++ you're supposed to operate on numbers as primitives |
| 11:49:41
| <dmilith> | yea |
| 11:49:52
| <Orion-> | mmm |
| 11:49:58
| <Orion-> | let me try |
| 11:49:58
| <dmilith> | in v8 level it's just a virtual thing, an object |
| 11:50:02
| <dmilith> | wrapped around your number |
| 11:50:37
| <dmilith> | (hope that some v8 guru wont kill me for any kind of herecy ;D) |
| 11:50:46
| <dmilith> | heresy* |
| 11:51:03
| <Orion-> | I got it |
| 11:51:08
| <Orion-> | Tadaaaaa |
| 11:51:14
| <Orion-> | It's weird |
| 11:51:19
| <Orion-> | look at this: |
| 11:51:21
| <Orion-> | Number::New(String::New("NaN")->NumberValue()) |
| 11:52:00
| <dmilith> | ;] |
| 11:52:10
| <dmilith> | hope I helped some way |
| 11:52:20
| <Orion-> | It really is Not a Number thought :) |
| 11:53:26
| <Orion-> | thanks for fiddling with me :) |
| 11:54:21
| <dmilith> | n/p |
| 11:54:29
| <Orion-> | I'm writing an RRD module for node |
| 11:54:41
| <dmilith> | it's interesting topic. I'm eager to see some comment about what I said. I might be wrong |
| 11:54:42
| <Orion-> | NaN is often seen in red world |
| 11:54:52
| <Orion-> | rrd |
| 11:54:57
| <Orion-> | s/red/rrd |
| 11:55:11
| <dmilith> | rrd sucks cause not supporting strings ;P |
| 11:55:47
| <Orion-> | rrd is great |
| 11:56:05
| <Orion-> | for what it is meant for |
| 11:56:33
| <dmilith> | anyway.. good luck, fighting with Your extension |
| 11:57:10
| <Orion-> | concerning 0/0, it doesn't compile |
| 11:57:26
| <Orion-> | which is no surprise to me |
| 11:58:05
| <Orion-> | well it compiles sorry but with the warning |
| 11:58:19
| <dmilith> | are You using clang? |
| 11:58:46
| <Orion-> | is node-waf using it ? |
| 11:58:58
| <dmilith> | node-waf is deprecated AFAIK |
| 11:59:08
| <dmilith> | they're using gyp since 0.8 IIRC |
| 11:59:21
| <Orion-> | don't know |
| 11:59:42
| <Orion-> | I'm fairly new to node native building stuff |
| 11:59:49
| <dmilith> | better check it out. http://blog.nodejs.org/2012/06/25/node-v0-8-0/ |
| 11:59:55
| <Orion-> | I just got into it this morning |
| 11:59:57
| <dmilith> | "BUILD SYSTEM" part |
| 12:00:33
| <Orion-> | google has lead me to tutorials using node-waf |
| 12:00:43
| <Orion-> | blame google ! :) |
| 12:00:55
| <dmilith> | yea, but I can learn something, dealing with your problem |
| 12:01:19
| <dmilith> | node-waf was/is used on node =< 0.6 |
| 12:01:25
| <dmilith> | in 0.8 it will work |
| 12:01:35
| <dmilith> | but probably not in new releases |
| 12:01:45
| <dmilith> | but it's better to ask isaacs |
| 12:02:36
| <Orion-> | I have node 0.8.1 and I'm using waf |
| 12:03:03
| <dmilith> | Orion-: did You see: https://github.com/alertedsnake/node-rrdtool ? |
| 12:03:39
| <Orion-> | Nop |
| 12:03:44
| <Orion-> | Let me check |
| 12:03:52
| <Orion-> | It's not native |
| 12:04:08
| <dmilith> | yes |
| 12:04:12
| <dmilith> | unfortunatelly |
| 12:04:21
| <Orion-> | It reminds me of javascript-rrd |
| 12:04:32
| <Orion-> | same binary file reading stuff |
| 12:04:38
| <dmilith> | yes |
| 12:04:55
| <dmilith> | it won't be as fast as in C when doing much math operations |
| 12:05:06
| <Orion-> | it will break if red updates it's binary formats |
| 12:05:16
| <Orion-> | rrd |
| 12:05:29
| <dmilith> | yup |
| 12:05:31
| <Orion-> | damn corrector |
| 12:05:45
| <dmilith> | turn it off in system preferences |
| 12:05:47
| <dmilith> | ;] |
| 12:05:50
| <Orion-> | :) |
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| 12:06:39
| <Orion-> | I have to go. Thanks and see you later. |
| 12:06:59
| <dmilith> | cu |
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| <rerntzdb> | is there a good way to interrupt a v8 instance while it is running javascript code? |
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| <CodeWar> | when running the V8 testsuite, do we reuse the same codecache after each subtest or use different chunks of memory and collect later |
| 23:12:04
| <CodeWar> | I m looking at compilation-cache.h is that the right placeholder for code that controls CodeCache memory allocation. Thanks |
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