/
traversable-object-example.ts
137 lines (125 loc) · 3.97 KB
/
traversable-object-example.ts
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import { TraversableObjectTree } from '../src/traversable-tree-implementations/traversable-object-tree';
import { DepthFirstTraversal } from '../src/traversals/depth-first-traversal/DepthFirstTraversal';
import { DepthFirstTraversalOrder } from '../src/traversals/depth-first-traversal/lib/DepthFirstTraversalOrder';
import { TraversalVisitorCommandName } from '../src/core/TraversalVisitor';
import { jsonStringifySafe } from '../src/utils/jsonStringifySafe';
const RED_FG = '\u001b[31m';
// const RED_BG = '\u001b[41m';
const GREEN_FG = '\u001b[92m';
// const GREEN_BG = '\u001b[102m';
const BLUE_FG = '\u001b[94m';
// const BLUE_BG = '\u001b[104m';
// const BLACK_FG = '\u001b[30m';
// const WHITE_FG = '\u001b[97m';
const RESET = '\u001b[0m';
const obj = {
F: {
B: {
A: 1,
D: ['C', 'E'],
},
G: {
_: null,
I: { H: 1 },
},
},
};
const traversableTree = new TraversableObjectTree(obj, {
makeVertexHook: (vertexHint) => {
if (vertexHint.value === null) {
return { returnMe: null };
}
return {};
},
});
const traversal = new DepthFirstTraversal({
traversableTree,
});
traversal.addVisitorFor(DepthFirstTraversalOrder.PRE_ORDER, (v) => {
console.log(
'-',
RED_FG,
'Pre-order'.padEnd(10),
RESET,
'key:',
v.getData().key,
'; value:',
jsonStringifySafe(v.getData().value),
);
});
traversal.addVisitorFor(DepthFirstTraversalOrder.POST_ORDER, (v) => {
console.log(
'-',
BLUE_FG,
'Post-order'.padEnd(10),
RESET,
'key:',
v.getData().key,
'; value:',
jsonStringifySafe(v.getData().value),
);
if (v.getData().key === 'B') {
return {
commands: [
{
commandName: TraversalVisitorCommandName.HALT_TRAVERSAL,
},
],
};
}
return {};
});
traversal.addVisitorFor(DepthFirstTraversalOrder.IN_ORDER, (v) => {
console.log(
'-',
GREEN_FG,
'In-order'.padEnd(10),
RESET,
'key:',
v.getData().key,
'; value:',
jsonStringifySafe(v.getData().value),
);
});
const traversalRunner = traversal.makeRunner();
traversalRunner.run();
console.log();
console.log('First stop. Traversal runner status:', traversalRunner.getStatus());
console.log();
traversalRunner.run();
console.log();
console.log('Second stop. Traversal runner status:', traversalRunner.getStatus());
/*
- Pre-order key: __TRAVERSABLE_OBJECT_TREE_DEFAULT_ROOT_KEY__ ; value: {"F":{"B":{"A":1,"D":["C","E"]},"G":{"_":null,"I":{"H":1}}}}
- Pre-order key: F ; value: {"B":{"A":1,"D":["C","E"]},"G":{"_":null,"I":{"H":1}}}
- Pre-order key: B ; value: {"A":1,"D":["C","E"]}
- Pre-order key: A ; value: 1
- In-order key: A ; value: 1
- Post-order key: A ; value: 1
- In-order key: B ; value: {"A":1,"D":["C","E"]}
- Pre-order key: D ; value: ["C","E"]
- Pre-order key: 0 ; value: "C"
- In-order key: 0 ; value: "C"
- Post-order key: 0 ; value: "C"
- In-order key: D ; value: ["C","E"]
- Pre-order key: 1 ; value: "E"
- In-order key: 1 ; value: "E"
- Post-order key: 1 ; value: "E"
- Post-order key: D ; value: ["C","E"]
- Post-order key: B ; value: {"A":1,"D":["C","E"]}
First stop. Status: HALTED
- In-order key: F ; value: {"B":{"A":1,"D":["C","E"]},"G":{"_":null,"I":{"H":1}}}
- Pre-order key: G ; value: {"_":null,"I":{"H":1}}
- In-order key: G ; value: {"_":null,"I":{"H":1}}
- Pre-order key: I ; value: {"H":1}
- Pre-order key: H ; value: 1
- In-order key: H ; value: 1
- Post-order key: H ; value: 1
- In-order key: I ; value: {"H":1}
- Post-order key: I ; value: {"H":1}
- Post-order key: G ; value: {"_":null,"I":{"H":1}}
- Post-order key: F ; value: {"B":{"A":1,"D":["C","E"]},"G":{"_":null,"I":{"H":1}}}
- In-order key: __TRAVERSABLE_OBJECT_TREE_DEFAULT_ROOT_KEY__ ; value: {"F":{"B":{"A":1,"D":["C","E"]},"G":{"_":null,"I":{"H":1}}}}
- Post-order key: __TRAVERSABLE_OBJECT_TREE_DEFAULT_ROOT_KEY__ ; value: {"F":{"B":{"A":1,"D":["C","E"]},"G":{"_":null,"I":{"H":1}}}}
Second stop. Status: FINISHED
*/