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Ashley Chen

I build free browser-side calculators at Miryori and write about the arithmetic behind everyday money and health decisions.

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Roman Numerals Are a Subtractive Notation: Parsing Them Backwards Is a Bug Factory
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Roman Numerals Are a Subtractive Notation: Parsing Them Backwards Is a Bug Factory

#javascript #webdev #algorithms #math
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4 min read
Solving for the Rate: Why r = n((A/P)^(1/(nt)) - 1) Breaks in Real Code
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Solving for the Rate: Why r = n((A/P)^(1/(nt)) - 1) Breaks in Real Code

#finance #javascript #webdev #math
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3 min read
Loan Payment Math: The Fixed-Payment Formula and the Five Bugs Around It
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Loan Payment Math: The Fixed-Payment Formula and the Five Bugs Around It

#finance #javascript #webdev #math
1
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3 min read
Future Value of a Lump Sum and an Annuity: One Formula, Two Cases
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Future Value of a Lump Sum and an Annuity: One Formula, Two Cases

#webdev #javascript #finance #algorithms
1
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2 min read
Compound Interest in Code: The Closed Form You Should Actually Use
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Compound Interest in Code: The Closed Form You Should Actually Use

#webdev #javascript #finance #beginners
1
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2 min read
Password Entropy: Why Length Beats Complexity Every Time
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Password Entropy: Why Length Beats Complexity Every Time

#security #passwords #javascript #webdev
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3 min read
The CAGR Formula Is Easy. The Edge Cases Are Where It Bites
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The CAGR Formula Is Easy. The Edge Cases Are Where It Bites

#webdev #productivity #javascript #beginners
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5 min read
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