Thanks Everyone for such good responses and for code pointers !!!
It really helped me.. I have a long string with multiple such
occurrences and I need to keep filling them into an array.. I consolidated
all of your approaches and now have a working model as below..
func ParseandFillCpuInfo (cmd_output string) {
var per_cpu Cpus
r := regexp.MustCompile(`Core Count: [0-9]+`)
match := r.FindAllStringSubmatch(cmd_output, -1)
for i:=0; i<count; i++ {
output := strings.Split(match[i][0], ": ")
fmt.Println("Parenthesis match =", output[1])
per_cpu.num_cores,_ = strconv.Atoi(output[1])
per_cpu.num_active_cores,_ = strconv.Atoi(output[1])
CpuInfoDB.per_cpu_info = append(CpuInfoDB.per_cpu_info, per_cpu)
} // for loop
fmt.Println("CPU info below:")
fmt.Println(CpuInfoDB)
}
On Thu, Apr 1, 2021 at 12:13 PM Michael Poole <mdpo...@troilus.org> wrote:
> You were on a good start with strings.Index(). The key is to move
> past the pattern you searched for, assuming it was found.
>
> Something like this should work, if `bigString` is what you are
> searching over, and depending on whether "Core Count:" might be on the
> first line or not:
>
> pattern := "\nCore Count: "
> if start := strings.Index(bigString, pattern); start >= 0 {
> var nCores int
> _, err := fmt.Sscanf(bigString[start+len(pattern):], "%d", &nCores)
> if err == nil {
> fmt.Println("Number of cores:", nCores)
> }
> }
>
> As you can see, the regular expression-based solution suggested by
> others leads to less code. This input string is so short that CPU
> usage will be negligible for most purposes, outweighed by graceful
> error handling and code maintenance concerns.
>
> Best regards,
> Michael
>
>
> On Thu, Apr 1, 2021 at 2:28 PM Sharan Guhan <shara...@gmail.com> wrote:
> >
> > Hi Experts,
> >
> > New to Golang and finding it non trivial to achieve the below
> efficiently :-) Any pointers will help..
> >
> > I have a huge string as below .. Now from this I want to extract the
> number "18" after "Core count".. I was thinking of walking through each
> string with Spilt("\n"), but that will make it slower. I also tried
> strings.Index with "Core count", but unable to see how to pull the 18 from
> this..
> >
> > Sharan
> >
> >
> > "Version: Intel(R) Xeon(R) Gold 6140 CPU @ 2.30GHz
> > Voltage: 1.6 V
> > External Clock: 100 MHz
> > Max Speed: 4000 MHz
> > Current Speed: 2300 MHz
> > Status: Populated, Enabled
> > Upgrade: Socket LGA3647-1
> > L1 Cache Handle: 0x004D
> > L2 Cache Handle: 0x004E
> > L3 Cache Handle: 0x004F
> > Serial Number: Not Specified
> > Asset Tag: UNKNOWN
> > Part Number: Not Specified
> > Core Count: 18"
> >
> > --
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> .
>
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