Range modifications: Difference between revisions
Added Wren
m (→{{header|Phix}}: 2..len -> more logical 1..len-1) |
(Added Wren) |
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Line 308:
remove 9 => 1-5,7-7,10-25,27-30
remove 7 => 1-5,10-25,27-30</pre>
=={{header|Wren}}==
{{libheader|Wren-fmt}}
<lang ecmascript>import "/fmt" for Fmt
var rangesAdd = Fn.new { |ranges, n|
if (ranges.count == 0) return ranges.add(n..n)
for (i in 0...ranges.count) {
var r = ranges[i]
if (n < r.from - 1) {
ranges.insert(i, n..n)
return
} else if (n == r.from-1) {
ranges[i] = n..r.to
return
} else if (n <= r.to) {
return
} else if (n == r.to+1) {
ranges[i] = r.from..n
if (i < ranges.count - 1 && (n == ranges[i+1].from || n + 1 == ranges[i+1].from)) {
ranges[i] = r.from..ranges[i+1].to
ranges.removeAt(i+1)
return
}
} else if (i == ranges.count - 1) {
ranges.add(n..n)
return
}
}
}
var rangesRemove = Fn.new { |ranges, n|
if (ranges.count == 0) return
for (i in 0...ranges.count) {
var r = ranges[i]
if (n <= r.from - 1) {
return
} else if (n == r.from && n == r.to) {
ranges.removeAt(i)
return
} else if (n == r.from) {
ranges[i] = n+1..r.to
return
} else if (n < r.to) {
ranges[i] = r.from..n-1
ranges.insert(i+1, n+1..r.to)
return
} else if (n == r.to) {
ranges[i] = r.from..n-1
return
}
}
}
var standard = Fn.new { |ranges| ranges.toString.replace("..", "-") }
var add = 0
var remove = 1
var fns = [
Fn.new { |ranges, n|
rangesAdd.call(ranges, n)
Fmt.print(" add $2d => $n", n, standard.call(ranges))
},
Fn.new { |ranges, n|
rangesRemove.call(ranges, n)
Fmt.print(" remove $2d => $n", n, standard.call(ranges))
}
]
var ranges = []
var ops = [ [add, 77], [add, 79], [add, 78], [remove, 77], [remove, 78], [remove, 79] ]
System.print("Start: %(standard.call(ranges))")
for (op in ops) fns[op[0]].call(ranges, op[1])
ranges = [1..3, 5..5]
ops = [ [add, 1], [remove, 4], [add, 7], [add, 8], [add, 6], [remove, 7] ]
System.print("\nStart: %(standard.call(ranges))")
for (op in ops) fns[op[0]].call(ranges, op[1])
ranges = [1..5, 10..25, 27..30]
ops = [ [add, 26], [add, 9], [add, 7], [remove, 26], [remove, 9], [remove, 7] ]
System.print("\nStart: %(standard.call(ranges))")
for (op in ops) fns[op[0]].call(ranges, op[1])</lang>
{{out}}
<pre>
Start: []
add 77 => [77-77]
add 79 => [77-77, 79-79]
add 78 => [77-79]
remove 77 => [78-79]
remove 78 => [79-79]
remove 79 => []
Start: [1-3, 5-5]
add 1 => [1-3, 5-5]
remove 4 => [1-3, 5-5]
add 7 => [1-3, 5-5, 7-7]
add 8 => [1-3, 5-5, 7-8]
add 6 => [1-3, 5-8]
remove 7 => [1-3, 5-6, 8-8]
Start: [1-5, 10-25, 27-30]
add 26 => [1-5, 10-30]
add 9 => [1-5, 9-30]
add 7 => [1-5, 7-7, 9-30]
remove 26 => [1-5, 7-7, 9-25, 27-30]
remove 9 => [1-5, 7-7, 10-25, 27-30]
remove 7 => [1-5, 10-25, 27-30]
</pre>
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