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Sorting Arrays
#
# Like GNU awk's asort() but works with any awk(1)
# NB: Named _asort() to prevent conflict with GNU awk
#
function _asort(src, dest)
{
k = nitems = 0
for (i in src) dest[++nitems] = src[i]
for (i = 1; i <= nitems; k = i++) {
val = dest[i]
while ((k > 0) && (dest[k] > val)) {
dest[k+1] = dest[k]; k--
}
dest[k+1] = val
}
return nitems
}
# Sample _asort() usage:
############################################################
#
# string = "abc,123"
# split(string, array, /,/)
# n = _asort(array, sorted_array)
# sorted_string = ""
# for (i = 1; i <= n; i++)
# sorted_string = sorted_string "," sorted_array[i]
# sub(/^,/, "", sorted_string)
# print sorted_string # produces "123,abc"
#
############################################################
#
# Like GNU awk's asorti() but works with any awk(1)
# NB: Named _asorti() to prevent conflict with GNU awk
#
function _asorti(src, dest)
{
k = nitems = 0
for (i in src) dest[++nitems] = i
for (i = 1; i <= nitems; k = i++) {
idx = dest[i]
while ((k > 0) && (dest[k] > idx)) {
dest[k+1] = dest[k]; k--
}
dest[k+1] = idx
}
return nitems
}
# Sample _asorti() usage:
############################################################
#
# foo["abc"] = 1 # value ignored
# foo["123"] = 1 # value ignored
# n = _asorti(foo, sorted_indices)
# for (i = 1; i <= n; i++)
# print sorted_indices[i]
# # Output Produced:
# # 123
# # abc
#
############################################################
Last modified 3yr ago