LEARNING JAVASCRIPT - Trang 13

Date Arithmetic 226

User-Friendly Relative Dates 227

Conclusion 227

16.

Math. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 229

Formatting Numbers 229

Fixed Decimals 230

Exponential Notation 230

Fixed Precision 230

Different Bases 231

Advanced Number Formatting 231

Constants 231

Algebraic Functions 232

Exponentiation 232

Logarithmic Functions 233

Miscellaneous 233

Pseudorandom Number Generation 234

Trigonometric Functions 235

Hyperbolic Functions 236

17.

Regular Expressions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237

Substring Matching and Replacing 237

Constructing Regular Expressions 238

Searching with Regular Expressions 239

Replacing with Regular Expressions 239

Input Consumption 240

Alternation 242

Matching HTML 242

Character Sets 243

Named Character Sets 244

Repetition 245

The Period Metacharacter and Escaping 246

A True Wildcard 246

Grouping 247

Lazy Matches, Greedy Matches 248

Backreferences 249

Replacing Groups 250

Function Replacements 251

Anchoring 253

Word Boundary Matching 253

Lookaheads 254

Constructing Regexes Dynamically 255

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