A function to insert a byte into a slice is conspicuous by its absence.
Consider this code to parse /proc/meminfo into a 2D array and insert commas:
MemTotal: 497464 kB
MemFree: 386232 kB
MemAvailable: 452420 kB
Buffers: 8612 kB
Cached: 60160 kB
...
.
aLine := bytes.SplitN(fileBuf, []byte("\n"), 6)
var aPair [5][][]byte
for a := 0; a < 5; a++ {
aPair[a] = bytes.SplitN(aLine[a], []byte(":"), 2)
aPair[a][1] = sRegEx.FindSubmatch(aPair[a][1])[1] // " *([0-9]+)"
if len(aPair[a][1]) > 3 {
// should be:
// aPair[a][1] = bytes.InsertByte(aPair[a][1], len(aPair[a][1])-3,
',')
// but instead it's gobbledygook:
aPair[a][1] = aPair[a][1][:len(aPair[a][1])+1]
copy(aPair[a][1][len(aPair[a][1])-2:],
aPair[a][1][len(aPair[a][1])-3:])
aPair[a][1][len(aPair[a][1])-4] = ','
}
}
Surely this is common enough to merit inclusion in stdlib.
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