Funso lanu: Kodi ndingafanizire bwanji zingwe ziwiri mu Unix shell script zosafanana?

Kuti muwone ngati zingwe ziwiri ndizofanana mu bash scripting, gwiritsani ntchito bash ngati mawu ndi kuwirikiza kawiri == woyendetsa. Kuti muwone ngati zingwe ziwiri sizili zofanana mu bash scripting, gwiritsani ntchito bash if statement osati yofanana ndi != operator.

Kodi mukufanizira bwanji zingwe ziwiri zosafanana?

Java String ikufanana () Njira

Njira yofanana () ikufanizira zingwe ziwiri, ndikubwezeretsanso ngati zingwezo zili zofanana, komanso zabodza ngati sichoncho. Langizo: Gwiritsani ntchito kulinganishaTo () njira kufanizitsa zingwe ziwiri motengera lexicographical.

Kodi mumayika bwanji osafanana mu chipolopolo?

=' Woyendetsa : Osafanana ndi opareshoni abwerere zoona ngati ma operands awiriwo sali ofanana apo ayi abwerera zabodza. '<' Oyendetsa : Zocheperapo kuposa opareshoni abwereranso zoona ngati woyamba operand ndi lees kuposa yachiwiri opareshoni ndi zina abweza zabodza.

Kodi mungagwiritse ntchito == kufananiza zingwe?

Mu String, == wogwiritsa ntchito amagwiritsidwa ntchito kufanizitsa kutchulidwa kwa zingwe zomwe zapatsidwa, kutengera ngati akutanthauza zinthu zomwezo. Mukayerekeza zingwe ziwiri pogwiritsa ntchito == woyendetsa, zibwereranso ngati zosintha za zingwe zikulozera ku chinthu chomwecho cha java. Apo ayi, idzabwerera zabodza .

Ndi iti mwa malamulo awa omwe mungagwiritse ntchito kuti muwone ngati zingwe ziwiri zili zofanana?

Mungagwiritse ntchito ogwira ntchito ofanana = ndi == kuwona ngati zingwe ziwiri ndi zofanana. Muyenera kugwiritsa ntchito malo amodzi musanayambe komanso pambuyo pa == ndi = ogwira ntchito.

Kodi pali kusiyana kotani pakati pa == ndi ofanana ()?

M'mawu osavuta, == imayang'ana ngati zinthu zonse ziwiri zikuloza malo omwe amakumbukira pomwe . Equals () amayesa kuyerekeza kwa zinthu zomwe zili muzinthu. Ngati kalasi silidutsa njira yofanana, ndiye kuti mwachisawawa limagwiritsa ntchito njira yofanana (Object o) ya kalasi ya makolo omwe ali pafupi kwambiri yomwe yaphwanya njirayi.

Kodi ndingafananize bwanji zingwe ziwiri mu typescript ngati zilili?

"ngati typescript fanizirani chingwe" Yankho la Khodi

1. var string1 = "Moni Dziko";
2. var string2 = "Moni dziko.";
3. ngati (chingwe1 === chingwe2) {
4. kutonthoza. chipika ("Zingwe zofananira!" );
5. }
6. kenaka {
7. kutonthoza. log ("Zingwe sizikufanana");
8. }

$ ndi chiyani? Mu bash script?

$? -Kutuluka kwa lamulo lomaliza lomwe laperekedwa. $0 -Dzina lafayilo lazolemba zapano. $# -Nambala ya mikangano yoperekedwa ku script. $$ -Nambala ya ndondomeko ya chipolopolo chamakono.

$ ndi chiyani? Mu shell script?

$? ndi kusintha kwapadera mu chipolopolo chomwe chimawerenga momwe mungatulukire lamulo lomaliza lomwe laperekedwa. Ntchito ikabweranso, $? imapereka mawonekedwe otuluka a lamulo lomaliza lomwe laperekedwa mu ntchitoyi.

== amatanthauza chiyani mu bash?

== ndi bash -specific alias = , yomwe imapanga chingwe (lexical) kufananitsa m'malo mwa -eq kufananitsa manambala. (Ndi cham'mbuyo kuchokera ku Perl: ogwiritsira ntchito mawu ndi manambala, ophiphiritsa a lexical.)

Kodi mungafananize bwanji zingwe za lexicographical?

Njira yofananira ndi () amagwiritsidwa ntchito kufanizitsa zingwe ziwiri motengera lexicographical mu Java.
...
Imabwezeranso mikhalidwe iyi:

• ngati (chingwe1> chingwe2) chikubweza mtengo wabwino.
• ngati zingwe zonsezo zili zofanana mwamatanthauzira mawu. ie(chingwe1 == chingwe2) chimabwereranso 0.
• ngati (chingwe1 <chingwe2) chikubweza mtengo wolakwika.

Kodi ndingayang'ane bwanji ngati zingwe ziwiri zili ndi zilembo zofanana?

Njira 2 (Kuwerengera zilembo)

1. Pangani zowerengera za kukula 256 kwa zingwe zonse ziwiri. Yambitsani ziwerengero zonse mumagulu owerengera ngati 0.
2. Bwerezani kupyola mumtundu uliwonse wa zingwe zonse ziwiri ndikuwonjezera chiwerengero cha zilembo mumagulu owerengera ofanana.
3. Fananizani zowerengera. Ngati mawerengero onse ali ofanana, bwererani zoona.

Kodi mumafananiza bwanji zingwe ziwiri mu lupu?

Gwiritsani ntchito njira yofanana (). kuti muwone ngati zingwe 2 ndizofanana. Njira yofanana () imakhala yokhudzidwa ndi nkhani, kutanthauza kuti chingwe "HELLO" chimatengedwa kuti ndi chosiyana ndi chingwe "hello". Wogwiritsa == sagwira ntchito modalirika ndi zingwe. Gwiritsani == kuti mufananize zinthu zakale monga int ndi char.