| 1 | # spec/ysh-methods
|
| 2 |
|
| 3 | ## our_shell: ysh
|
| 4 | ## oils_failures_allowed: 2
|
| 5 |
|
| 6 | #### => operator for pure computation is allowed (may be mandatory later)
|
| 7 |
|
| 8 | # later we may make it mandatory
|
| 9 |
|
| 10 | if ("abc" => startsWith("a")) {
|
| 11 | echo yes
|
| 12 | }
|
| 13 |
|
| 14 | var mylist = [1, 2, 3]
|
| 15 |
|
| 16 | # This one should be ->
|
| 17 | call mylist->pop()
|
| 18 | echo 'ok'
|
| 19 |
|
| 20 | ## STDOUT:
|
| 21 | yes
|
| 22 | ok
|
| 23 | ## END
|
| 24 |
|
| 25 | #### => can be used to chain free functions
|
| 26 |
|
| 27 | func dictfunc() {
|
| 28 | return ({k1: 'spam', k2: 'eggs'})
|
| 29 | }
|
| 30 |
|
| 31 | echo $[list(dictfunc()) => join('/') => upper()]
|
| 32 |
|
| 33 | # This is nicer and more consistent
|
| 34 | echo $[dictfunc() => list() => join('/') => upper()]
|
| 35 |
|
| 36 | ## STDOUT:
|
| 37 | K1/K2
|
| 38 | K1/K2
|
| 39 | ## END
|
| 40 |
|
| 41 | #### Str => startsWith(Str) and endsWith(Str), simple
|
| 42 | func test(s, p) { echo $[s => startsWith(p)] $[s => endsWith(p)] }
|
| 43 |
|
| 44 | call test('', '')
|
| 45 | call test('abc', '')
|
| 46 | call test('abc', 'a')
|
| 47 | call test('abc', 'b')
|
| 48 | call test('abc', 'c')
|
| 49 | call test('abc', 'z')
|
| 50 | call test('', 'abc')
|
| 51 | ## status: 0
|
| 52 | ## STDOUT:
|
| 53 | true true
|
| 54 | true true
|
| 55 | true false
|
| 56 | false false
|
| 57 | false true
|
| 58 | false false
|
| 59 | false false
|
| 60 | ## END
|
| 61 |
|
| 62 | #### Str => startsWith(Str) and endsWith(Str), matches bytes not runes
|
| 63 | func test(s, p) { echo $[s => startsWith(p)] $[s => endsWith(p)] }
|
| 64 |
|
| 65 | call test(b'\yce\ya3', u'\u{03a3}')
|
| 66 | call test(b'\yce\ya3', b'\yce')
|
| 67 | call test(b'\yce\ya3', b'\ya3')
|
| 68 | call test(b'\yce', b'\yce')
|
| 69 | ## status: 0
|
| 70 | ## STDOUT:
|
| 71 | true true
|
| 72 | true false
|
| 73 | false true
|
| 74 | true true
|
| 75 | ## END
|
| 76 |
|
| 77 | #### Str => startsWith(Str) and endsWith(Str), eggex
|
| 78 | func test(s, p) { echo $[s => startsWith(p)] $[s => endsWith(p)] }
|
| 79 |
|
| 80 | call test('abc', / d+ /)
|
| 81 | call test('abc', / [ a b c ] /)
|
| 82 | call test('abc', / 'abc' /)
|
| 83 | call test('cba', / d+ /)
|
| 84 | call test('cba', / [ a b c ] /)
|
| 85 | call test('cba', / 'abc' /)
|
| 86 | ## status: 0
|
| 87 | ## STDOUT:
|
| 88 | false false
|
| 89 | true true
|
| 90 | true true
|
| 91 | false false
|
| 92 | true true
|
| 93 | false false
|
| 94 | ## END
|
| 95 |
|
| 96 | #### Str => startsWith(Str) and endsWith(Str), eggex with anchors
|
| 97 | func test(s, p) { echo $[s => startsWith(p)] $[s => endsWith(p)] }
|
| 98 |
|
| 99 | call test('ab', / %start 'a' /)
|
| 100 | call test('ab', / 'a' %end /)
|
| 101 | call test('ab', / %start 'a' %end /)
|
| 102 | call test('ab', / %start 'b' /)
|
| 103 | call test('ab', / 'b' %end /)
|
| 104 | call test('ab', / %start 'b' %end /)
|
| 105 | ## status: 0
|
| 106 | ## STDOUT:
|
| 107 | true false
|
| 108 | false false
|
| 109 | false false
|
| 110 | false false
|
| 111 | false true
|
| 112 | false false
|
| 113 | ## END
|
| 114 |
|
| 115 | #### Str => startsWith(Str) and endsWith(Str), eggex matches bytes not runes
|
| 116 | func test(s, p) { echo $[s => startsWith(p)] $[s => endsWith(p)] }
|
| 117 |
|
| 118 | call test(u'\u{03a3}', / dot /)
|
| 119 | call test(u'\u{03a3}', / ![z] /)
|
| 120 | call test(b'\yce', / dot /) # Fails: eggex does not match bytes
|
| 121 | call test(b'\yce', / ![z] /) # Fails: eggex does not match bytes
|
| 122 | ## status: 0
|
| 123 | ## STDOUT:
|
| 124 | true true
|
| 125 | true true
|
| 126 | true true
|
| 127 | true true
|
| 128 | ## END
|
| 129 |
|
| 130 | #### Str => startsWith(), no args
|
| 131 | = 'abc' => startsWith()
|
| 132 | ## status: 3
|
| 133 |
|
| 134 | #### Str => startsWith(), too many args
|
| 135 | = 'abc' => startsWith('extra', 'arg')
|
| 136 | ## status: 3
|
| 137 |
|
| 138 | #### Str => endsWith(), no args
|
| 139 | = 'abc' => endsWith()
|
| 140 | ## status: 3
|
| 141 |
|
| 142 | #### Str => endsWith(), too many args
|
| 143 | = 'abc' => endsWith('extra', 'arg')
|
| 144 | ## status: 3
|
| 145 |
|
| 146 | #### Str => trim*() with no args trims whitespace
|
| 147 | func test(s) { write --sep ', ' --j8 $[s => trimStart()] $[s => trimEnd()] $[s => trim()] }
|
| 148 |
|
| 149 | call test("")
|
| 150 | call test(" ")
|
| 151 | call test("mystr")
|
| 152 | call test(" mystr")
|
| 153 | call test("mystr ")
|
| 154 | call test(" mystr ")
|
| 155 | call test(" my str ")
|
| 156 | ## status: 0
|
| 157 | ## STDOUT:
|
| 158 | "", "", ""
|
| 159 | "", "", ""
|
| 160 | "mystr", "mystr", "mystr"
|
| 161 | "mystr", " mystr", "mystr"
|
| 162 | "mystr ", "mystr", "mystr"
|
| 163 | "mystr ", " mystr", "mystr"
|
| 164 | "my str ", " my str", "my str"
|
| 165 | ## END
|
| 166 |
|
| 167 | #### Str => trim*() with a simple string pattern trims pattern
|
| 168 | func test(s, p) { write --sep ', ' --j8 $[s => trimStart(p)] $[s => trimEnd(p)] $[s => trim(p)] }
|
| 169 |
|
| 170 | call test('' , 'xyz')
|
| 171 | call test(' ' , 'xyz')
|
| 172 | call test('xy' , 'xyz')
|
| 173 | call test('yz' , 'xyz')
|
| 174 | call test('xyz' , 'xyz')
|
| 175 | call test('xyzxyz' , 'xyz')
|
| 176 | call test('xyzxyzxyz', 'xyz')
|
| 177 | ## status: 0
|
| 178 | ## STDOUT:
|
| 179 | "", "", ""
|
| 180 | " ", " ", " "
|
| 181 | "xy", "xy", "xy"
|
| 182 | "yz", "yz", "yz"
|
| 183 | "", "", ""
|
| 184 | "xyz", "xyz", ""
|
| 185 | "xyzxyz", "xyzxyz", "xyz"
|
| 186 | ## END
|
| 187 |
|
| 188 | #### Str => trim*() with a string pattern trims bytes not runes
|
| 189 | func test(s, p) { write --sep ', ' --j8 $[s => trimStart(p)] $[s => trimEnd(p)] $[s => trim(p)] }
|
| 190 |
|
| 191 | call test(b'\yce\ya3', u'\u{03a3}')
|
| 192 | call test(b'\yce\ya3', b'\yce')
|
| 193 | call test(b'\yce\ya3', b'\ya3')
|
| 194 | ## status: 0
|
| 195 | ## STDOUT:
|
| 196 | "", "", ""
|
| 197 | b'\ya3', "Σ", b'\ya3'
|
| 198 | "Σ", b'\yce', b'\yce'
|
| 199 | ## END
|
| 200 |
|
| 201 | #### Str => trim*() with an eggex pattern trims pattern
|
| 202 | func test(s, p) { write --sep ', ' --j8 $[s => trimStart(p)] $[s => trimEnd(p)] $[s => trim(p)] }
|
| 203 |
|
| 204 | call test('' , / 'xyz' /)
|
| 205 | call test(' ' , / 'xyz' /)
|
| 206 | call test('xy' , / 'xyz' /)
|
| 207 | call test('yz' , / 'xyz' /)
|
| 208 | call test('xyz' , / 'xyz' /)
|
| 209 | call test('xyzxyz' , / 'xyz' /)
|
| 210 | call test('xyzxyzxyz', / 'xyz' /)
|
| 211 | call test('xyzabcxyz', / 'xyz' /)
|
| 212 | call test('xyzabcxyz', / %start 'xyz' /)
|
| 213 | call test('xyzabcxyz', / 'xyz' %end /)
|
| 214 | call test('123abc123', / d+ /)
|
| 215 | ## status: 0
|
| 216 | ## STDOUT:
|
| 217 | "", "", ""
|
| 218 | " ", " ", " "
|
| 219 | "xy", "xy", "xy"
|
| 220 | "yz", "yz", "yz"
|
| 221 | "", "", ""
|
| 222 | "xyz", "xyz", ""
|
| 223 | "xyzxyz", "xyzxyz", "xyz"
|
| 224 | "abcxyz", "xyzabc", "abc"
|
| 225 | "abcxyz", "xyzabcxyz", "abcxyz"
|
| 226 | "xyzabcxyz", "xyzabc", "xyzabc"
|
| 227 | "abc123", "123abc", "abc"
|
| 228 | ## END
|
| 229 |
|
| 230 | #### Str => trim*() with an eggex pattern trims bytes not runes
|
| 231 | func test(s, p) { write --sep ', ' --j8 $[s => trimStart(p)] $[s => trimEnd(p)] $[s => trim(p)] }
|
| 232 |
|
| 233 | call test(u'\u{03a3}', / dot /) # Fails: eggex does not match bytes, so entire rune is trimmed.
|
| 234 | call test(u'\u{03a3}', / ![z] /) # Fails: eggex does not match bytes, so entire rune is trimmed.
|
| 235 | call test(b'\yce', / dot /) # Fails: eggex does not match bytes, so nothing is trimmed.
|
| 236 | call test(b'\yce', / ![z] /) # Fails: eggex does not match bytes, so nothing is trimmed.
|
| 237 | ## status: 0
|
| 238 | ## STDOUT:
|
| 239 | b'\ya3', b'\yce', ""
|
| 240 | b'\ya3', b'\yce', ""
|
| 241 | "", "", ""
|
| 242 | "", "", ""
|
| 243 | ## END
|
| 244 |
|
| 245 | #### Str => trim(), too many args
|
| 246 | = 'mystr' => trim('extra', 'args')
|
| 247 | ## status: 3
|
| 248 |
|
| 249 | #### Str => trimStart(), too many args
|
| 250 | = 'mystr' => trimStart('extra', 'args')
|
| 251 | ## status: 3
|
| 252 |
|
| 253 | #### Str => trimEnd(), too many args
|
| 254 | = 'mystr' => trimEnd('extra', 'args')
|
| 255 | ## status: 3
|
| 256 |
|
| 257 | #### Str => trim(), unicode whitespace aware
|
| 258 |
|
| 259 | # Supported set of whitespace characters. The full set of Unicode whitespace
|
| 260 | # characters is not supported. See comments in the implementation.
|
| 261 | var spaces = [
|
| 262 | b'\u{0009}', # Horizontal tab (\t)
|
| 263 | b'\u{000A}', # Newline (\n)
|
| 264 | b'\u{000B}', # Vertical tab (\v)
|
| 265 | b'\u{000C}', # Form feed (\f)
|
| 266 | b'\u{000D}', # Carriage return (\r)
|
| 267 | b'\u{0020}', # Normal space
|
| 268 | b'\u{00A0}', # No-break space <NBSP>
|
| 269 | b'\u{FEFF}', # Zero-width no-break space <ZWNBSP>
|
| 270 | ] => join('')
|
| 271 |
|
| 272 | echo $["$spaces YSH $spaces" => trim()]
|
| 273 | ## status: 0
|
| 274 | ## STDOUT:
|
| 275 | YSH
|
| 276 | ## END
|
| 277 |
|
| 278 | #### Str => trim*(), unicode decoding errors
|
| 279 | var badUtf = b'\yF9'
|
| 280 |
|
| 281 | echo trim
|
| 282 |
|
| 283 | # We only decode UTF until the first non-space char. So the bad UTF-8 is
|
| 284 | # missed.
|
| 285 | try { call " a$[badUtf]b " => trim() }
|
| 286 | echo status=$_status
|
| 287 |
|
| 288 | # These require trim to decode the badUtf, so an error is raised
|
| 289 | try { call "$[badUtf]b " => trim() }
|
| 290 | echo status=$_status
|
| 291 | try { call " a$[badUtf]" => trim() }
|
| 292 | echo status=$_status
|
| 293 |
|
| 294 | # Similarly, trim{Left,Right} will assume correct encoding until shown
|
| 295 | # otherwise.
|
| 296 | echo trimStart
|
| 297 | try { call " a$[badUtf]" => trimStart() }
|
| 298 | echo status=$_status
|
| 299 | try { call "$[badUtf]b " => trimStart() }
|
| 300 | echo status=$_status
|
| 301 |
|
| 302 | echo trimEnd
|
| 303 | try { call "$[badUtf]b " => trimEnd() }
|
| 304 | echo status=$_status
|
| 305 | try { call " a$[badUtf]" => trimEnd() }
|
| 306 | echo status=$_status
|
| 307 |
|
| 308 | ## STDOUT:
|
| 309 | trim
|
| 310 | status=0
|
| 311 | status=3
|
| 312 | status=3
|
| 313 | trimStart
|
| 314 | status=0
|
| 315 | status=3
|
| 316 | trimEnd
|
| 317 | status=0
|
| 318 | status=3
|
| 319 | ## END
|
| 320 |
|
| 321 | #### Str => trimStart(), unicode decoding error types
|
| 322 | var badStrs = [
|
| 323 | b'\yF4\yA2\yA4\yB0', # Too large of a codepoint
|
| 324 | b'\yED\yBF\y80', # Surrogate
|
| 325 | b'\yC1\y81', # Overlong
|
| 326 | b'\y80', b'\yFF', # Does not match UTF8 bit pattern
|
| 327 | ]
|
| 328 |
|
| 329 | for badStr in (badStrs) {
|
| 330 | try { call badStr => trimStart() }
|
| 331 | echo status=$_status
|
| 332 | }
|
| 333 |
|
| 334 | ## STDOUT:
|
| 335 | status=3
|
| 336 | status=3
|
| 337 | status=3
|
| 338 | status=3
|
| 339 | status=3
|
| 340 | ## END
|
| 341 |
|
| 342 | #### Str => trimEnd(), unicode decoding error types
|
| 343 | # Tests the backwards UTF-8 decoder
|
| 344 | var badStrs = [
|
| 345 | b'\yF4\yA2\yA4\yB0', # Too large of a codepoint
|
| 346 | b'\yED\yBF\y80', # Surrogate
|
| 347 | b'\yC1\y81', # Overlong
|
| 348 | b'\y80', b'\yFF', # Does not match UTF8 bit pattern
|
| 349 | ]
|
| 350 |
|
| 351 | for badStr in (badStrs) {
|
| 352 | try { call badStr => trimEnd() }
|
| 353 | echo status=$_status
|
| 354 | }
|
| 355 |
|
| 356 | ## STDOUT:
|
| 357 | status=3
|
| 358 | status=3
|
| 359 | status=3
|
| 360 | status=3
|
| 361 | status=3
|
| 362 | ## END
|
| 363 |
|
| 364 | #### Str => trim*(), zero-codepoints are not NUL-terminators
|
| 365 | json write (b' \y00 ' => trim())
|
| 366 | json write (b' \y00 ' => trimStart())
|
| 367 | json write (b' \y00 ' => trimEnd())
|
| 368 | ## STDOUT:
|
| 369 | "\u0000"
|
| 370 | "\u0000 "
|
| 371 | " \u0000"
|
| 372 | ## END
|
| 373 |
|
| 374 | #### Str => split(sep), non-empty str sep
|
| 375 | pp test_ ('a,b,c'.split(','))
|
| 376 | pp test_ ('aa'.split('a'))
|
| 377 | pp test_ ('a<>b<>c<d'.split('<>'))
|
| 378 | pp test_ ('a;b;;c'.split(';'))
|
| 379 | pp test_ (''.split('foo'))
|
| 380 | ## STDOUT:
|
| 381 | (List) ["a","b","c"]
|
| 382 | (List) ["","",""]
|
| 383 | (List) ["a","b","c<d"]
|
| 384 | (List) ["a","b","","c"]
|
| 385 | (List) []
|
| 386 | ## END
|
| 387 |
|
| 388 | #### Str => split(sep), eggex sep
|
| 389 | pp test_ ('a,b;c'.split(/ ',' | ';' /))
|
| 390 | pp test_ ('aa'.split(/ dot /))
|
| 391 | pp test_ ('a<>b@@c<d'.split(/ '<>' | '@@' /))
|
| 392 | pp test_ ('a b cd'.split(/ space+ /))
|
| 393 | pp test_ (''.split(/ dot /))
|
| 394 | ## STDOUT:
|
| 395 | (List) ["a","b","c"]
|
| 396 | (List) ["","",""]
|
| 397 | (List) ["a","b","c<d"]
|
| 398 | (List) ["a","b","cd"]
|
| 399 | (List) []
|
| 400 | ## END
|
| 401 |
|
| 402 | #### Str => split(sep, count), non-empty str sep
|
| 403 | pp test_ ('a,b,c'.split(',', count=-1))
|
| 404 | pp test_ ('a,b,c'.split(',', count=-2)) # Any negative count means "ignore count"
|
| 405 | pp test_ ('aa'.split('a', count=1))
|
| 406 | pp test_ ('a<>b<>c<d'.split('<>', count=10))
|
| 407 | pp test_ ('a;b;;c'.split(';', count=2))
|
| 408 | pp test_ (''.split('foo', count=3))
|
| 409 | pp test_ ('a,b,c'.split(',', count=0))
|
| 410 | pp test_ (''.split(',', count=0))
|
| 411 | ## STDOUT:
|
| 412 | (List) ["a","b","c"]
|
| 413 | (List) ["a","b","c"]
|
| 414 | (List) ["","a"]
|
| 415 | (List) ["a","b","c<d"]
|
| 416 | (List) ["a","b",";c"]
|
| 417 | (List) []
|
| 418 | (List) ["a,b,c"]
|
| 419 | (List) []
|
| 420 | ## END
|
| 421 |
|
| 422 | #### Str => split(sep, count), eggex sep
|
| 423 | pp test_ ('a,b;c'.split(/ ',' | ';' /, count=-1))
|
| 424 | pp test_ ('aa'.split(/ dot /, count=1))
|
| 425 | pp test_ ('a<>b@@c<d'.split(/ '<>' | '@@' /, count=50))
|
| 426 | pp test_ ('a b c'.split(/ space+ /, count=0))
|
| 427 | pp test_ (''.split(/ dot /, count=1))
|
| 428 | ## STDOUT:
|
| 429 | (List) ["a","b","c"]
|
| 430 | (List) ["","a"]
|
| 431 | (List) ["a","b","c<d"]
|
| 432 | (List) ["a b c"]
|
| 433 | (List) []
|
| 434 | ## END
|
| 435 |
|
| 436 | #### Str => split(), usage errors
|
| 437 | try { pp test_ ('abc'.split('')) } # Sep cannot be ""
|
| 438 | echo status=$[_error.code]
|
| 439 | try { pp test_ ('abc'.split()) } # Sep must be present
|
| 440 | echo status=$[_error.code]
|
| 441 | try { pp test_ (b'\y00a\y01'.split(/ 'a' /)) } # Cannot split by eggex when str has NUL-byte
|
| 442 | echo status=$[_error.code]
|
| 443 | try { pp test_ (b'abc'.split(/ space* /)) } # Eggex cannot accept empty string
|
| 444 | echo status=$[_error.code]
|
| 445 | try { pp test_ (b'abc'.split(/ dot* /)) } # But in some cases the input doesn't cause an
|
| 446 | # infinite loop, so we actually allow it!
|
| 447 | echo status=$[_error.code]
|
| 448 | ## STDOUT:
|
| 449 | status=3
|
| 450 | status=3
|
| 451 | status=3
|
| 452 | status=3
|
| 453 | (List) ["",""]
|
| 454 | status=0
|
| 455 | ## END
|
| 456 |
|
| 457 | #### Str => split(), non-ascii
|
| 458 | pp test_ ('🌞🌝🌞🌝🌞'.split('🌝'))
|
| 459 | pp test_ ('🌞🌝🌞🌝🌞'.split(/ '🌝' /))
|
| 460 | ## STDOUT:
|
| 461 | (List) ["🌞","🌞","🌞"]
|
| 462 | (List) ["🌞","🌞","🌞"]
|
| 463 | ## END
|
| 464 |
|
| 465 | #### Dict => values()
|
| 466 | var en2fr = {}
|
| 467 | setvar en2fr["hello"] = "bonjour"
|
| 468 | setvar en2fr["friend"] = "ami"
|
| 469 | setvar en2fr["cat"] = "chat"
|
| 470 | pp test_ (en2fr => values())
|
| 471 | ## status: 0
|
| 472 | ## STDOUT:
|
| 473 | (List) ["bonjour","ami","chat"]
|
| 474 | ## END
|
| 475 |
|
| 476 | #### Dict -> erase()
|
| 477 | var book = {title: "The Histories", author: "Herodotus"}
|
| 478 | call book->erase("author")
|
| 479 | pp test_ (book)
|
| 480 | # confirm method is idempotent
|
| 481 | call book->erase("author")
|
| 482 | pp test_ (book)
|
| 483 | ## status: 0
|
| 484 | ## STDOUT:
|
| 485 | (Dict) {"title":"The Histories"}
|
| 486 | (Dict) {"title":"The Histories"}
|
| 487 | ## END
|
| 488 |
|
| 489 | #### Dict -> get()
|
| 490 | var book = {title: "Hitchhiker's Guide", published: 1979}
|
| 491 | pp test_ (book => get("title", ""))
|
| 492 | pp test_ (book => get("published", 0))
|
| 493 | pp test_ (book => get("author", ""))
|
| 494 | ## status: 0
|
| 495 | ## STDOUT:
|
| 496 | (Str) "Hitchhiker's Guide"
|
| 497 | (Int) 1979
|
| 498 | (Str) ""
|
| 499 | ## END
|
| 500 |
|
| 501 | #### Separation of -> attr and () calling
|
| 502 | const check = "abc" => startsWith
|
| 503 | pp test_ (check("a"))
|
| 504 | ## status: 0
|
| 505 | ## STDOUT:
|
| 506 | (Bool) true
|
| 507 | ## END
|
| 508 |
|
| 509 | #### Bound methods, receiver value/reference semantics
|
| 510 | var is_a_ref = { "foo": "bar" }
|
| 511 | const f = is_a_ref => keys
|
| 512 | pp test_ (f())
|
| 513 | setvar is_a_ref["baz"] = 42
|
| 514 | pp test_ (f())
|
| 515 |
|
| 516 | var is_a_val = "abc"
|
| 517 | const g = is_a_val => startsWith
|
| 518 | pp test_ (g("a"))
|
| 519 | setvar is_a_val = "xyz"
|
| 520 | pp test_ (g("a"))
|
| 521 | ## status: 0
|
| 522 | ## STDOUT:
|
| 523 | (List) ["foo"]
|
| 524 | (List) ["foo","baz"]
|
| 525 | (Bool) true
|
| 526 | (Bool) true
|
| 527 | ## END
|
| 528 |
|
| 529 | #### List => indexOf()
|
| 530 | var items = [1, '2', 3, { 'a': 5 }]
|
| 531 |
|
| 532 | json write (items => indexOf('a'))
|
| 533 | json write (items => indexOf(1))
|
| 534 | json write (items => indexOf('2'))
|
| 535 | json write (items => indexOf({'a': 5}))
|
| 536 | ## STDOUT:
|
| 537 | -1
|
| 538 | 0
|
| 539 | 1
|
| 540 | 3
|
| 541 | ## END
|
| 542 |
|
| 543 | #### List => join()
|
| 544 | var items = [1, 2, 3]
|
| 545 |
|
| 546 | json write (items => join()) # default separator is ''
|
| 547 | json write (items => join(" ")) # explicit separator (can be any number or chars)
|
| 548 | json write (items => join(", ")) # separator can be any number of chars
|
| 549 |
|
| 550 | try {
|
| 551 | json write (items => join(1)) # separator must be a string
|
| 552 | }
|
| 553 | echo "failed with status $_status"
|
| 554 | ## STDOUT:
|
| 555 | "123"
|
| 556 | "1 2 3"
|
| 557 | "1, 2, 3"
|
| 558 | failed with status 3
|
| 559 | ## END
|
| 560 |
|
| 561 | #### List->reverse()
|
| 562 |
|
| 563 | var empty = []
|
| 564 |
|
| 565 | var a = [0]
|
| 566 | var b = [2, 1, 3]
|
| 567 | var c = :| hello world |
|
| 568 |
|
| 569 | call empty->reverse()
|
| 570 | call a->reverse()
|
| 571 | call b->reverse()
|
| 572 | call c->reverse()
|
| 573 |
|
| 574 | pp test_ (empty)
|
| 575 | pp test_ (a)
|
| 576 | pp test_ (b)
|
| 577 | pp test_ (c)
|
| 578 |
|
| 579 | ## STDOUT:
|
| 580 | (List) []
|
| 581 | (List) [0]
|
| 582 | (List) [3,1,2]
|
| 583 | (List) ["world","hello"]
|
| 584 | ## END
|
| 585 |
|
| 586 | #### List->reverse() from iterator
|
| 587 | var x = list(0 .. 3)
|
| 588 | call x->reverse()
|
| 589 | write @x
|
| 590 | ## STDOUT:
|
| 591 | 2
|
| 592 | 1
|
| 593 | 0
|
| 594 | ## END
|
| 595 |
|