Comparing Technologies 91 When designing an application with
92 Chapter 3 Application Design: A Real-Life Example n Do similar systems exist that perform almost the same task? n If so, can we reuse anything from that design? n Can we reuse foreign techniques, maybe add up to our system with them? Questions over questions. The first is easy to answer.We want to create a chat system.How? Well,with PHP, and somehow server-side we don t know much more about it at this time. Are there already any chat systems or something similar out there? Indeed there are. It starts right at your shell the talk command allows you to chat with other people that you can reach via a valid network link (or local link), as shown in Figure 3.1. Figure 3.1 The traditional talk command.
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