Software Tools in JavaScript

ContentsContentsIntroductionWho is our audience?What tools and ideas do we cover?How are these lessons laid out?How did we get here?How can people use and contribute to this material?Who helped us and inspired us?Systems ProgrammingHow can we list a directory?What is a callback function?What are anonymous functions?How can we select a set of files?How can we copy a set of files?ExercisesAsynchronous ProgrammingHow can we manage asynchronous execution?How do promises work?How are real promises different?How can we build tools with promises?Lining things upHow can we make this more readable?How can we handle errors with asynchronous code?ExercisesUnit TestingHow should we structure unit testing?How can we separate registration, execution, and reporting?How should we structure test registration?How can we build a command-line interface for testing?ExercisesFile BackupHow can we uniquely identify files?How can we back up files?How can we track which files have already been backed up?How can we test code that modifies files?Design for testExercisesData TablesHow can we implement data tables?How can we test the performance of our implementations?What is the most efficient way to save a table?Does binary storage improve performance?ExercisesPattern MatchingHow can we match query selectors?How can we implement a simple regular expression matcher?How can we implement an extensible matcher?ExercisesParsing ExpressionsHow can we break text into tokens?How can we turn a list of tokens into a tree?ExercisesPage TemplatesWhat will our system look like?How can we keep track of values?How do we handle nodes?How do we implement node handlers?How can we implement control flow?How did we know how to do all of this?ExercisesBuild ManagerWhat's in a build manager?Where should we start?How can we specify that a file is out of date?How can we update out-of-date files?How can we add generic build rules?What should we do next?ExercisesLayout EngineHow can we size rows and columns?How can we position rows and columns?How can we render elements?How can we wrap elements to fit?What subset of CSS will we support?ExercisesFile InterpolatorHow can we evaluate JavaScript dynamically?How can we manage files?How can we find files?How can we interpolate pieces of code?What did we do instead?ExercisesModule LoaderHow can we implement namespaces?How can we load a module?Do we need to handle circular dependencies?How can a module load another module?ExercisesStyle CheckerHow can we parse JavaScript to create an AST?How can we find things in an AST?How can we apply checks?How does the AST walker work?How else could the AST walker work?What other kinds of analysis can we do?ExercisesCode GeneratorHow can we replace a function with another function?How can we generate JavaScript?How can we count how often functions are executed?How can we time function execution?ExercisesDocumentation GeneratorHow can we extract documentation comments?What input will we try to handle?How can we avoid duplicating names?ExercisesModule BundlerWhat will we use as test cases?How can we find dependencies?How can we safely combine several files into one?How can files access each other?ExercisesPackage ManagerWhat is semantic versioning?How can we find a consistent set of packages?How can we implement satisfy constraints?How can we do less work?ExercisesVirtual MachineWhat is the architecture of our virtual machine?How can we execute these instructions?What do assembly programs look like?How can we store data?ExercisesDebuggerWhat is our starting point?How can we make a tracing debugger?How can we make the debugger interactive?How can we test an interactive application?ExercisesConclusionLicensingWritingSoftwareBibliographyCode of ConductOur StandardsOur ResponsibilitiesScopeEnforcementAttributionContributingMaking DecisionsFormattingWhat We're Looking ForGlossaryLinksAuthorsIndex