Odersky M. Programming in Scala
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Index 751
standalone objects, 102
standard error stream, 89
statements
multiple-line, 99
static members, 99
static typing, 52–55
Steele, Guy, 41, 506
String class, 108
methods
r (via RichString), 529
stripMargin (via
RichString), 113
StringBuilder class, 340
stringLiteral method
in trait JavaTokenParsers,
650
strings
formatting, 459
iterating through the characters
of, 51
literals, 113
long, 113
raw, 113, 528
treating as Seq[Char] (via
RichString), 367
structural subtyping, see http://
booksites.artima.com/
programming_in_scala
Structure and Interpretation of
Computer Programs
(Abelson, et. al.), 393
style recommendations
prefer alphabetic names unless
symbolic names have
established meaning, 656
prefer classes to tuples when
data combination has
meaning, 385
prefer vals, immutable objects,
and methods without side
effects, 88
use implicit conversions with
restraint, 147
subclasses
and equals method, 579
defining, 214
subtyping
and type parameters, 417
versus subclassing, 720
subtyping polymorphism, 222
Success class, 657
super references
special treatment in traits, 248
superclasses, 214
invoking constructor on, 219
supertype, 428
Sussman, Gerald J., 393, 506
Swing, 671–681
Swing class, 675
methods
EmptyBorder, 675
switch statement (Java), 163
symbol literals, 114
symbolic versus alphabetic names,
656
SynchronizedMap trait, 375
SynchronizedSet trait, 377
syntactical analysis, 665
T
Table class, 683, 686
TableUpdated class, 694
$tag method
on trait ScalaObject, 241
tags, XML, 540
tail method
on class List, 79, 329, 488
tail recursion, 189–193, 493
optimization, 191
turning off with
notailcalls, 192
take method
on class List, 337
takeWhile method
on class List, 346
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Index 752
target typing, 179
template, definition of, 721
term, in function literals, 186
Test annotation
in JUnit 4, 600
in TestNG, 286
test suites, 290
TestCase class, 290
testing, 88, 281–292
integration, 554
unit, 171
with mock objects, 556
with singletons, 556
TestNG, 284–286
Text class, 541
text method
on class Node, 545
text processing in XML, 540, 545
TextField class, 687
Thinking in Java (Eckel), 226n
this, 135–136
aliasing, 659
and self types, 563
Thread class, 613
thread safety, 40, 375, 619, 620
threads, and actors, 612–613
throw expressions, 160
throws annotation, 598
to method
on class Int (via RichInt), 73,
128, 240
toArray method
on class List, 340
toChar method
on class Int, 690
toInt method
on class String (via
RichString), 49
toList method
on class Array, 340, 382
on class ListBuffer, 363, 494
top method
on class Stack, 366
top method
on class
SimpleGUIApplication,
672
Torreborre, Eric, 287
toString method, 132, 237
generated for case classes, 295
on class Any, 237
overriding, 132
traits, see also mixin composition,
245, 561–564
and abstract parameters, 439
and Java interfaces, 597
annotating, 534
generic, 410, 417
initializing, 439
linearization of, 258–262
mixing in, 81
transient annotation, 537
TreeMap class, 375
TreeSet class, 375
true value, 115
try expressions, 159–163
tuple patterns, 303
tuples, 383–385
creating and using, 80
one-based element access, 81
result of -> operation, 85
when to use a class instead, 385
type aliases, 436
type annotations, 40, 54, 60
for debugging, 358
type casts, see casting
type constructors, 417
type erasure, 306
type inference, 55, 85n
Hindley-Milner style, 358
the algorithm, 355
type keyword
in singleton types, such as
db.type, 567
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Index 753
in type alias definitions, 368,
436
type members, 436–437
type parameterization, see
parameterized types
type parameters, 333, 410
in parser results, 657
lower bounds, 424
upper bounds, 431
type tests
with isInstanceOf, 304
with type patterns (preferred
style), 303
type-driven design, 425
typed patterns, 303
types
abstract, 447
bottom, 243
erasure, 584
existential, 586, 602–605
generic, 410
ground, 722
in for expressions, 513
integral, 107
numeric, 107
path-dependent, 449–452
primitive, 75
result, 62
return, 62
runtime, 722
self, 563, 696, 700
singleton, 567
static, 722
target, 467
typing
dynamic, xxvii, 53, 55, 114
static, 52–55
target, 179
U
Ullman, Jeffrey, 506
unapply method
in extractors, 517
unapplySeq method
in extractors, 523
unary operations, 117, 143
unchecked annotation, 312, 401,
534
Unicode, 111
Unified Modeling Language
Reference Manual, The
(Rumbaugh, et. al.), 260n
uniform access principle, 212
Unit class, 87
as return type of a method, 97
unit testing, 88, 171, 281–292
unit value, 152
unnamed package, 264
until method
on class Int (via RichInt),
228, 240, 384
unzip method
on object List, 353
update method
on class Array, 74
upper bounds, 431
user interfaces, 671–707
reactive programming, 683, 707
V
vals, see also variables
abstract, 437
annotating, 534
as fields, 93
conditional initialization of, 150
defining, 60–62
lazy, 444
preferring over vars, 86
referencing mutable objects, 72
“val” on class parameters, 218
Value class, 452
value classes, 238
value parameterization, 71
ValueChanged class, 703
values method
on Map traits, 372
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Index 754
van Rossum, Guido, 433
vararg matching, 523
variable patterns, 299
variable-binding patterns, 307
variable-length arguments, or
“varargs”, see repeated
parameters
variables
bound, 157, 184
captured by closures, 188
defining, 60–62
using patterns, 314, 385
fields, 93–95
final (Java), see vals
free, 184
instance, 95
local, 169
multiple definitions of, 385
reassignable, see also vars, 390
scope, 167–170
shadowing, 169
variance, 418
annotations, 417–421
compiler checking of,
421–424, 431
declaration-site, 426
use-site, 426
vars, see also variables
abstract, 438
and mutable objects, 389
annotating, 534
as fields, 93
defining, 60–62
on class parameters, 218
programming without, 86
verifiable properties, 53
view bounds, 434, 482
viewportView property
on class ScrollPane, 685
volatile annotation, 536, 597
W
Wall, Larry, 433
warnings, see compiler warnings
while loops, 65–67, 151–154
as imperative style, 86
wildcard patterns, 298
wildcard types (Java), 602
Wirth, Niklaus, 506
with keyword, 247
X
XML, 539–552
attributes, 541, 546
character encoding, 548
configuration files, 554, 565
deserialization, 547
elements, 540–541
literals, 541–543
pattern matching, 549–552
serialization, 543–545
tags, 540
text, 540
using an at sign (@) to extract
attributes , 546
using curly braces ({}) in
pattern matching, 549
XPath, 545
XML object
methods
loadFile, 548
saveFull, 548
XPath, 545
Y
Yacc, 642
yield keyword
in for expressions, 158, 501
Z
zip method
on class List, 338
zipWithIndex method
on class List, 338
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