injoy questions

• Can we get Persistent Volume with only PVC (without PV) in k8s?
• What is the meaning of argv[1][0]?
• How to reference the output of the previous command twice in Linux command?
• How to use kubectl command to get a value from a yaml file inside a k8s configmap?
• What's the real style when multiple CSS style classes are applied to the same element?
• 'this' pointer not initialized in Java program
• What does (provide = true) do in GWT?
• Is there a algorithm to extract the minimum number of Cartesian products from a set of formulas?
• Why does image scale not work in reStructuredText when generating html files?
• How Kafka guarantee the messages order while we increase the partitions in runtime?

injoy answers