python - using OR in pycassa index expressions -
is there way express or operator using pycassa's crerate_index_clause() method? know create 2 clauses , compare results, love solution create one.
cassandra doesn't have support disjunction @ time.
c - sscanf() double showing zeros -
i'm having troubles sscanf() function read doubles. have comma separated text file this: abc,def,0.465798,0.754314 ghi,jkl,0.784613,0.135264 mno,opq,0.489614,0.745812 etc. so first line fgets() , use sscanf() 2 string , 2 double variables. fgets(buffer, 28, file); sscanf(buffer, "%4[^,],%4[^,],%lf[^,],%lf[^\n]", string1, string2, &double1, &double2); printf("%s %s %f %f\n", string1, string2, double1, double2); but output is: abc def 0.465798 0.000000 ghi jkl 0.784613 0.000000 mno opq 0.489614 0.000000 so somehow doesn't scan last float. i've tried %lf[^ \t\n\r\v\f,] , %lf still doesn't work. change "%4[^,],%4[^,],%lf[^,],%lf[^\n]" to int result; result = sscanf(buffer, "%4[^,],%4[^,],%lf,%lf", string1, string2, &double1, &double2); if (result != 4) // handle error notice & on double1 , double2 - likley typo. also strongly recommend check result 4. not checking sscanf(...
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