Què és una tupla?
Una tupla és un objecte que pot contenir diversos elements. Els elements poden ser de diferents tipus de dades. Els elements de tuples s'inicialitzen com a arguments en l'ordre en què s'hi accedirà.
Operacions sobre tupla :-
1. obtenir() :- get() s'utilitza per accedir als valors de la tupla i modificar-los, accepta l'índex i el nom de la tupla com a arguments per accedir a un element de tupla particular.
2. make_tuple() :- make_tuple() s'utilitza per assignar tuple amb valors. Els valors passats haurien d'estar en ordre amb els valors declarats en tupla.
CPP
// C++ code to demonstrate tuple, get() and make_pair()> #include> #include // for tuple> using> namespace> std;> int> main()> {> >// Declaring tuple> >tuple <>char>,>int>,>float>>friki;> >// Assigning values to tuple using make_tuple()> >geek = make_tuple(>'a'>, 10, 15.5);> >// Printing initial tuple values using get()> >cout << 'The initial values of tuple are : ';> >cout << get(geek) << ' ' << get(geek);> >cout << ' ' << get(geek) << endl;> >// Use of get() to change values of tuple> >get(geek) =>'b'>;> >get(geek) = 20.5;> >// Printing modified tuple values> >cout << 'The modified values of tuple are : ';> >cout << get(geek) << ' ' << get(geek);> >cout << ' ' << get(geek) << endl;> >return> 0;> }> |
índex java de
>
>
Sortida:
The initial values of tuple are : a 10 15.5 The modified values of tuple are : b 10 20.5>
Al codi anterior, get() modifica el primer i el tercer valor de la tupla.
3. mida_tupla :- Retorna el nombre d'elements presents a la tupla.
CPP
Sree Ramanujan
//C++ code to demonstrate tuple_size> #include> #include // for tuple_size and tuple> using> namespace> std;> int> main()> {> >// Initializing tuple> >tuple <>char>,>int>,>float>>geek(20,>'g'>,17.5);> >// Use of size to find tuple_size of tuple> >cout << 'The size of tuple is : ';> >cout << tuple_size<>decltype>(geek)>::valor<< endl;> >return> 0;> }> |
>
>
Sortida:
The size of tuple is : 3>
4. intercanviar () :- El swap(), intercanvia els elements de les dues tuples diferents.
CPP
//C++ code to demonstrate swap()> #include> #include // for swap() and tuple> using> namespace> std;> int> main()> {> >// Initializing 1st tuple> >tuple <>int>,>char>,>float>>tup1(20,>'g'>,17.5);> > >// Initializing 2nd tuple> >tuple <>int>,>char>,>float>>blunt2(10,>'f'>,15.5);> > >// Printing 1st and 2nd tuple before swapping> >cout << 'The first tuple elements before swapping are : ';> >cout << get(tup1) << ' ' << get(tup1) << ' '> ><< get(tup1) << endl;> >cout << 'The second tuple elements before swapping are : ';> >cout << get(tup2) << ' ' << get(tup2) << ' '> ><< get(tup2) << endl;> > >// Swapping tup1 values with tup2> >tup1.swap(tup2);> > >// Printing 1st and 2nd tuple after swapping> >cout << 'The first tuple elements after swapping are : ';> >cout << get(tup1) << ' ' << get(tup1) << ' '> ><< get(tup1) << endl;> >cout << 'The second tuple elements after swapping are : ';> >cout << get(tup2) << ' ' << get(tup2) << ' '> ><< get(tup2) << endl;> >return> 0;> }> |
>
modificar el fitxer linux
>
Sortida:
valor de cadena de
The first tuple elements before swapping are : 20 g 17.5 The second tuple elements before swapping are : 10 f 15.5 The first tuple elements after swapping are : 10 f 15.5 The second tuple elements after swapping are : 20 g 17.5>
5. corbata() :- El treball de tie() és descomprimir els valors de la tupla en variables separades. Hi ha dues variants de tie(), amb i sense ignore , l'ignore ignora un element de tupla particular i evita que es desempaqueti.
CPP
// C++ code to demonstrate working of tie()> #include> #include // for tie() and tuple> using> namespace> std;> int> main()> {> >// Initializing variables for unpacking> >int> i_val;> >char> ch_val;> >float> f_val;> > >// Initializing tuple> >tuple <>int>,>char>,>float>>tup1(20,>'g'>,17.5);> >// Use of tie() without ignore> >tie(i_val,ch_val,f_val) = tup1;> > >// Displaying unpacked tuple elements> >// without ignore> >cout << 'The unpacked tuple values (without ignore) are : ';> >cout << i_val << ' ' << ch_val << ' ' << f_val;> >cout << endl;> > >// Use of tie() with ignore> >// ignores char value> >tie(i_val,ignore,f_val) = tup1;> > >// Displaying unpacked tuple elements> >// with ignore> >cout << 'The unpacked tuple values (with ignore) are : ';> >cout << i_val << ' ' << f_val;> >cout << endl;> >return> 0;> }> |
>
>
Sortida:
The unpacked tuple values (without ignore) are : 20 g 17.5 The unpacked tuple values (with ignore) are : 20 17.5>
6. tuple_cat() :- Aquesta funció concatena dues tuples i retorna una nova tuple.
CPP
cadena separada en java
// C++ code to demonstrate working of tuple_cat()> #include> #include // for tuple_cat() and tuple> using> namespace> std;> int> main()> {> >// Initializing 1st tuple> >tuple <>int>,>char>,>float>>tup1(20,>'g'>,17.5);> >// Initializing 2nd tuple> >tuple <>int>,>char>,>float>>blunt2(30,>'f'>,10.5);> > >// Concatenating 2 tuples to return a new tuple> >auto> tup3 = tuple_cat(tup1,tup2);> > >// Displaying new tuple elements> >cout << 'The>new> tuple elements in order are : ';> >cout << get(tup3) << ' ' << get(tup3) << ' ';> >cout << get(tup3) << ' ' << get(tup3) << ' ';> >cout << get(tup3) << ' ' << get(tup3) << endl;> >return> 0;> }> |
>
>
Sortida:
The new tuple elements in order are : 20 g 17.5 30 f 10.5>