18 lines
659 B
Awk
18 lines
659 B
Awk
BEGIN {
|
|
a[i] = "null" # i is initially undefined
|
|
for (i in a) { # i is null string
|
|
print length(i), a[i] # , typeof(i) # 0 null
|
|
print (i==0), (i=="") # 1 1 should be 0 1
|
|
}
|
|
print a[""] # null
|
|
print a[0] #
|
|
|
|
b[$2] = "null also" # $2 is also undefined
|
|
for (j in b) {
|
|
print length(j), a[j] # , typeof(i) # 0 null
|
|
print (j==0), (j=="") # 1 1 should be 0 1
|
|
}
|
|
print b[""] # null
|
|
print b[0] #
|
|
}
|