Terjemahan disediakan oleh mesin penerjemah. Jika konten terjemahan yang diberikan bertentangan dengan versi bahasa Inggris aslinya, utamakan versi bahasa Inggris.
# Ekspresi
Anda dapat menambahkan string ekspresi untuk menjalankan fungsi di Amazon Lex V2. Tabel ini menunjukkan sintaks dan contoh yang dapat digunakan dalam ekspresi SRGS.
| Jenis ekspresi | Sintaksis | Contoh | Didukung? |
| --- | --- | --- | --- |
| Ekspresi reguler literal | String literal yang berisi karakter khusus [regex](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions) yang valid | "^\d\.$"
| Tidak |
| Fungsi | function functionName(parameters) { functionBody} | var x = function calc() {
return 10;
} | Tidak |
| Delete | delete expression | delete obj.property;
| Tidak |
| Kekosongan | void expression | void (2 == '2');
| Tidak |
| Tipeof | typeof expression | typeof 42;
| Tidak |
| Indeks anggota | expression [ expressions ] | var fruits = ["apple"];
fruits[0];
| Ya |
| Dot anggota | expression . identifier | out.value
| Ya |
| Pendapat | expression (arguments) | new Date('1994-10-11') | Ya |
| Posting kenaikan | expression\+\+ | var x=10; x++;
| Ya |
| Posting penurunan | expression-- | var x=10; x--;
| Ya |
| Pra kenaikan | \+\+expression | var x=10; ++x;
| Ya |
| Pra penurunan | --expression | var x=10; --x;
| Ya |
| Unary plus/Unary minus | \+expression / -expression | +x / -x;
| Ya |
| Sedikit tidak | \~ expression | const a = 5;
console.log( ~a );
| Ya |
| Logis tidak | \! expression | !(a > 0 || b > 0)
| Ya |
| Multiplikatif | expression ('\*' \| '/' \| '%') expression | (x + y) * (a / b)
| Ya |
| Aditif | expression ('\+' \| '-') expression | (a + b) - (a - (a + b))
| Ya |
| Pergeseran bit | expression ('<<' \| '>>' \| '>>>') expression | (a >> b) >>> c
| Ya |
| Relatif | expression ('<' \| '>' \| '<=' \| '>=') expression | if (a > b) { ... } | Ya |
| Masuk | expression in expression | fruits[0] in otherFruits;
| Ya |
| Kesetaraan | expression ('==' \| '\!=' \| '===' \| '\!===') expression | if (a == b) { ... } | Ya |
| Bit dan/ xor/atau | expression ('&' \| '^' \| '\|') expression | a & b / a ^ b / a | b
| Ya |
| Logis dan/atau | expression ('&&' \| '\|\|') expression | if (a && (b ||c)) { ...} | Ya |
| Ternary | expression ? expression : expression | a > b ? obj.prop : 0
| Ya |
| Penugasan | expression = expression | out.value = "string";
| Ya |
| Operator penugasan | expression ('\*=' \| '/=' \| '\+=' \| '-=' \| '%=') expression | a *= 10;
| Ya |
| Penugasan operator bitwise | expression ('<<=' \| '>>=' \| '>>>=' \| '&=' \| '^=' \| '\|=') expression | a <<= 10;
| Ya |
| Pengidentifikasi | identifierSequence[di mana *IdentifierSequence* adalah urutan karakter yang valid](https://developer.mozilla.org/en-US/docs/Glossary/Identifier) | fruits=[10, 20, 30];
| Ya |
| Null literal | null | x = null;
| Ya |
| Boolean harfiah | true \| false | x = true;
| Ya |
| String literal | 'string' / "string" | a = 'hello',
b = "world";
| Ya |
| Desimal literal | integer [.] digits [exponent] | 111.11 e+12
| Ya |
| Hex literal | 0 (x \| X)[0-9a-fA-F] | 0x123ABC
| Ya |
| Literal oktal | O [0-7] | "O51"
| Ya |
| Array literal | [ expression, ... ] | v = [a, b, c];
| Ya |
| Objek literal | {property: value, ...} | out = {value: 1, flag: false}; | Ya |
| Kurung | ( expressions ) | x + (x + y)
| Ya |