mmsqe

Keybase proof

I hereby claim:

• I am mmsqe on github.
• I am mavistan (https://keybase.io/mavistan) on keybase.
• I have a public key ASB2GFJDOBUug_zJaQD141-UiFWbsvKk_oQsGHP9gu-kSQo

To claim this, I am signing this object:

mmsqe

+(Location *)CalculateBoundary:(CLLocation *)currentLocation
                      distance:(NSNumber *)distance {
    Location *location = [[Location alloc] init];
    float a = [distance floatValue]/Radius;
    // convert to radian
    float dLat = a/(M_PI/180);    
    CLLocationCoordinate2D coor = [currentLocation coordinate];    
    location.latMax = [NSNumber numberWithFloat: (coor.latitude + dLat)];
    location.latMin = [NSNumber numberWithFloat: (coor.latitude - dLat)];
    float aLat = M_PI*coor.latitude/180;

mmsqe

var pyramids = {
    data: [],
    path: [],
    result: []
};
pyramids = generatePyramids(3);

function getRandomInt(max) {
    return Math.floor(Math.random() * max) + 1;
}

mmsqe

// since the inner function uses the same scope as the loop, while data i changes after the loop
// create new function to snapshot it with localI for inner function
function createArrayOfFunctions(y) {
    var arr = [];
    for (var i = 0; i < y; i++) {
        (function(localI) {
            arr[i] = function(x) {
                return x + localI;
            };
        })(i);

mmsqe

var results = {};
var fibonacci = function(n) {
    var result = results[n];
    if (result) {
        return result;
    }
    if (n <= 2) {
        result = 1;
    } else {
        result = fibonacci(n - 1) + fibonacci(n - 2);

mmsqe

since sourceMap uses each item as key, it's O(n) mapping

mmsqe

var isSubset = function(sourceArray, targetArray) {
    var sourceMap = {};
    sourceArray.forEach(function(item) {
        sourceMap[item] = true;
    });
    for (var i = 0; i < targetArray.length; i++) {
        var item = targetArray[i];
        if (!sourceMap[item]) {
            return false;
        }