redis/hexists

Check if a field exists in a hash (returns 0 or 1)

const app = mvfm(prelude, redis);
const prog = app({}, ($) => {
  return $.begin(
    $.redis.hset("user:1", { name: "Alice" }),
    $.redis.hexists("user:1", "name")
  );
});
await fold(
  defaults(app, { redis: memoryRedisInterpreter }),
  prog
);

const app = mvfm(prelude, redis);
const prog = app({}, ($) => {
  return $.begin(
    $.redis.hset("user:1", { name: "Alice" }),
    $.redis.hexists("user:1", "name")
  );
});
await fold(
  defaults(app, { redis: memoryRedisInterpreter }),
  prog
);

const app = mvfm(prelude, redis);
const prog = app({}, ($) => {
  return $.begin(
    $.redis.hset("user:1", { name: "Alice" }),
    $.redis.hexists("user:1", "name")
  );
});
await fold(
  defaults(app, { redis: memoryRedisInterpreter }),
  prog
);

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