metamaps--metamaps/realtime/node_modules/redis/examples/subqueries.js

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// Sending commands in response to other commands.
// This example runs "type" against every key in the database
//
var client = require("redis").createClient();
client.keys("*", function (err, keys) {
keys.forEach(function (key, pos) {
client.type(key, function (err, keytype) {
console.log(key + " is " + keytype);
if (pos === (keys.length - 1)) {
client.quit();
}
});
});
});