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