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Versions: 54
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Stored size: 1.98 KB
Contents
'use strict';
var Robot = function () {
this.coordinates = [0, 0];
this.bearing = 'north';
};
Robot.prototype.at = function (xcoord, ycoord) {
this.coordinates = [xcoord, ycoord];
};
Robot.prototype.orient = function (direction) {
if (direction != 'north' &&
direction != 'south' &&
direction != 'east' &&
direction != 'west') {
throw 'Invalid Robot Bearing'
}
this.bearing = direction;
return 'The robot is pointed ' + direction;
};
Robot.prototype.advance = function () {
if (this.bearing === 'north') {
this.coordinates[1] += 1;
} else if (this.bearing === 'south') {
this.coordinates[1] -= 1;
} else if (this.bearing === 'east') {
this.coordinates[0] += 1;
} else if (this.bearing === 'west') {
this.coordinates[0] -= 1;
}
};
Robot.prototype.turnLeft = function () {
if (this.bearing === 'north') {
this.orient('west');
} else if (this.bearing === 'south') {
this.orient('east');
} else if (this.bearing === 'east') {
this.orient('north');
} else if (this.bearing === 'west') {
this.orient('south');
}
};
Robot.prototype.turnRight = function () {
if (this.bearing === 'north') {
this.orient('east');
} else if (this.bearing === 'south') {
this.orient('west');
} else if (this.bearing === 'east') {
this.orient('south');
} else if (this.bearing === 'west') {
this.orient('north');
}
};
Robot.prototype.instructions = function (s) {
var result = [];
s.split('').forEach(function (character) {
if (character === 'L') {
result.push('turnLeft');
} else if (character === 'R') {
result.push('turnRight');
} else if (character === 'A') {
result.push('advance');
}
});
return result;
};
Robot.prototype.place = function (args) {
this.coordinates = [args.x, args.y];
this.bearing = args.direction;
};
Robot.prototype.evaluate = function (s) {
this.instructions(s).forEach(function (instruction) {
this[instruction]();
}, this);
};
module.exports = Robot;
Version data entries
54 entries across 54 versions & 1 rubygems