hathix

class ImmutableMap<T> {
    // This is immutable, can't be changed in place
    private innerMap: Map<string,T>;

    public constructor(nativeMap = new Map<string,T>()) {
        this.innerMap = nativeMap;
    }


    public keys() : string[] {

hathix

/**
 * Strips the time part away from a date so that it's a pure date (no time). 
 */
function toPureDate(d: Date) : Date {
    return new Date(d.getFullYear(), d.getMonth(), d.getDate(), 0, 0, 0, 0);
}

function hoursAgo(h: number) : Date {
    const now: Date = new Date();
    now.setTime(now.getTime() - h * 60 * 60 * 1000);

hathix

// Simulating Bitcoin's Proof-of-Work mining algorithm
// The challenge: choose a nonce that, when appended to "hello",
// yields an MD5 hash with at least 4 leading zeroes
for (let i = 0; i < 1000000; i++) {
  out = md5("hello" + i);
  if (out.startsWith("0000")) {
    console.log(i, out)
  }
}

hathix

Andover-Harvard Theological Library
Arnold Arboretum Horticultural Library
Arthur and Elizabeth Schlesinger Library on the History of Women in America
Baker Library
Baker Library Special Collections
Birkhoff Mathematical Library
Botany Libraries
Cabot Science Library
Chemistry and Chemical Biology Library
Countway Library of Medicine

hathix

Fogg Museum
Busch-Reisinger Museum
Arthur M. Sackler Museum
Carpenter Center
Peabody Museum
Graduate School of Design
Harvard Semitic Museum
Arnold Arboretum
Collection of Historical Scientific Instruments
Harvard Museum of Natural History

hathix

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