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reduce() is a head spinner.
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Can you solve this? Regex seems tricky too. |
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Featured content |
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At first you think you can just swap in anyone you like right? |
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Wrong. They're not what you think. |
And we must learn the difference once and for all to avoid painful bugs down the line. |
And what's this difference? |
It's the incredible contrast in how they treat truthy and falsy values. |
What are these? |
Falsy: becomes false in a Boolean() or if : |
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0
undefined
null
NaN
false
'' (empty string)
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Truthy: every single thing else: |
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Now see what happens when you create a || chain like this: |
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How common is this? |
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It's yet another instance where we want a value that depends on whether or not there's an exception. |
Normally, you'd most likely create a mutable variable outside the scope for error-free access within and after the try-catch. |
But it doesn't always have to be this way. Not with a functional try-catch. |
A pure tryCatch() function avoids mutable variables and encourages maintainability and predictability in our codebase. |
No external states are modified – tryCatch() encapsulates the entire error-handling logic and produces a single output. |
Our catch turns into a one-liner with no need for braces: |
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So what does this tryCatch() function look like anyway? |
From how we used it above you can already guess the definition: |
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Thanks for taking the time to read today's issue. |
Don't let the bugs byte,
Tari Ibaba |
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