Straddling checkerboard: Difference between revisions

Line 728:

===Dictionary-Based Version===

<lang d>import std.stdio, std.string, std.algorithm, std.regex, std.array, std.range;

<lang d>import std.stdio, std.string, std.algorithm, std.regex, std.array, std.range, std.typecons;

immutable string[const string] val2key, key2val;

static this() pure /*@safe*/ {

static this() pure /*nothrow @safe*/ {

~~val2key~~ = ["A":"30", "B":"31", "C":"32", "D":"33", "E":"5", "F":"34", "G":"35",

immutable aa = ["A":"30", "B":"31", "C":"32", "D":"33", "E":"5", "F":"34", "G":"35",

"H":"0", "I":"36", "J":"37", "K":"38", "L":"2", "M":"4", ".":"78", "N":"39",

"/":"79", "O":"1", "0":"790", "P":"70", "1":"791", "Q":"71", "2":"792",

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"6":"796", "V":"73", "7":"797", "W":"74", "8":"798", "X":"75", "9":"799",

"Y":"76", "Z":"77"];

val2key = aa;

key2val = ~~val2key~~.~~byValue~~.~~zip~~(~~val2key~~.~~byKey~~).assocArray;

key2val = aa.byKeyValue.map!(t => tuple(t.value, t.key)).assocArray;

}

string encode(in string s) pure @safe {

string encode(in string s) pure /*nothrow*/ @safe {

return s.toUpper.split("").map!(c => val2key.get(c, "")).join;

}

string decode(in string s) /*pure*/ @safe {

string decode(in string s) /*pure nothrow*/ @safe {

return s.matchAll("79.|3.|7.|.").map!(g => key2val.get(g[0], "")).join;

}