Never mind everyone. I wasn't configuring my bindings.gyp file to read the
fastbit library correctly.
On Oct 24, 2012, at 12:10 PM, Olson, Andrew wrote:
> I also tried it the other way, iterating over the columns instead of rows.
> Now there is a weird error. The array of uint32_t values is interleaved with
> 0's. Here is a snippet of the output:
>
> getColumnAsUInts(gene_id, buf) = 52
> JSON[0,0]=50002
> JSON[0,1]=0
> JSON[0,2]=50003
> JSON[0,3]=0
> JSON[0,4]=50004
> JSON[0,5]=0
> JSON[0,6]=50010
> JSON[0,7]=0
> JSON[0,8]=50011
> JSON[0,9]=0
>
> The code is pasted below. I've never seen this before so it is probably
> clashing with something in node.h or v8.h, right?
>
> Andrew
>
> Local<Array> toJson(const ibis::table &tbl)
> {
> tbl.dump(std::cout);
>
> size_t nr = tbl.nRows();
> ibis::table::stringList nms = tbl.columnNames();
> ibis::table::typeList tps = tbl.columnTypes();
>
> Local<Array> JSON = Array::New();
>
> int ierr = 0;
> for (int j = 0; j < (int)nms.size(); ++ j) {
> Local<Array> column = Array::New();
> switch (tps[j]) {
> case ibis::UINT:
> {
> uint32_t *buf = new uint32_t[nr];
> ierr = tbl.getColumnAsUInts(nms[j], buf);
> printf("getColumnAsUInts(%s, buf) =
> %d\n",nms[j],ierr);
> for (size_t i = 0; i < nr; ++ i) {
> printf("JSON[%d,%ld]=%d\n",j,i,buf[i]);
> //
> column->Set(Integer::New(i),NumberObject::New(buf[i]));
> }
> break;
> }
> default:
> {
> break;
> }
> }
> // JSON->Set(j,column->Clone());
> }
> printf("done building JSON\n");
> return JSON;
> }
>
> On Oct 23, 2012, at 3:58 PM, Olson, Andrew wrote:
>
>> Hi John,
>> I'm working on exposing some FastBit based code for use in node.js. For
>> example, I'd like to be able to perform basic SQL queries on a single
>> fastbit data table. I'm having trouble mapping the ibis::table into a 2D
>> Javascript array. There are probably some additional problems with my use
>> of node.h and v8.h functions, but I can't get past line 21 if (cur == 0).
>> The code is pasted here: http://pastie.org/private/yyxqdhm7yeakxdzdig5ipw
>>
>> Any ideas on why the cursor is not defined?
>>
>> Andrew
>> _______________________________________________
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>
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