Chapter 7: initial samples

Chapter07/leveldb-sql-app/tasks.js

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+const levelup = require('levelup')
+const memdown = require('memdown')
+
+const db = levelup(memdown('./data'))
+
+const task = process.argv[2]
+
+if (!task) {
+    listTasks()
+} else {
+    addTask()
+}
+
+function addTask() {
+    const key = `Task: ${Math.random().toString(32).replace('.', '')}`
+    db.put(key, task, (err) => {
+        if (err) throw err
+        listTasks()
+    })
+}
+
+function listTasks() {
+    db.createReadStream().on('data', (data) => {
+        console.log(data.key.toString(), '=', data.value.toString())
+    })
+}