JavaScript Debugging for Beginners | Julie Pagano
Note: the interactive parts of this post do not work any more after years of migrating to different static site generators and much of the code being out-of-date. I set out to write a post about JavaScript debugging for beginners because I often see people struggling with this and want to help. I hope this post provides some useful information to help you get started. I tried to cram a lot in here
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Turning IRB on its head with Pry
IRB is a great tool and is perfect for experimenting with small code samples and testing out new ideas. It has some difficulty however when the code samples become a bit larger or you’d like to start an IRB session half-way through a method, for example. Pry, in some sense, is IRB turned on its head. Instead of having to bring your code to a REPL session (as with IRB) you instead bring a REPL sess
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Perl ã§ã® print debug ã®æ–¹æ³•ã®ç´¹ä»‹ãŒãƒ–ーム(?)ã ã£ãŸã®ã§ã€è‡ªåˆ†ãŒã‚ˆãè¡Œã£ã¦ã‚‹ Ruby ã§ã® debug 方法7ã¤ã«ã¤ã„ã¦æ›¸ã„ã¦ã¿ã¾ã™ã€‚ p ã”å˜ã˜ã®äººã‚‚多ㄠKernel#p メソッド。ã“れを使ã†ã¨ã‚ªãƒ–ジェクトã®å†…容を見やã™ã„å½¢ã§å‡ºåŠ›ã—ã¦ãã‚Œã¾ã™ã€‚ >> p ({:foobar => :baz}) {:foobar=>:baz}Object#inspect を使ã†ã¨ã€p ã§å‡ºåŠ›ã™ã‚‹ã¨ãã¨åŒã˜æ–‡å—列を String ã¨ã—ã¦å–å¾—ã§ãã¾ã™ã€‚ >> puts ({:foobar => :baz}).inspect {:foobar=>:baz}åˆå¿ƒè€…ã®é ƒã“ã® p ã§ã®å‡ºåŠ›ã‚’使ã†æ–¹æ³•ãŒã‚ã‹ã‚‰ãªãã¦å›°ã£ãŸè¨˜æ†¶ãŒâ€¦ã€‚ pp pp ã¨ã„ã†ãƒ©ã‚¤ãƒ–ラリを使ã†ã¨ã€p よりã€ã‚ˆã‚Šè¦‹ã‚„ã™ã„å½¢å¼ã§å‡ºåŠ›ã—ã¦ãã‚Œã¾ã™ã€‚ãŸã¨ãˆã° >> a = Array.new(10) { {:foobar => :
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