Javascript menghapus tanda baca dari akhir string

Selama pemrosesan tekstual, apakah Anda mencari kata-kata tertentu dan membuat aturan pencocokan pola, menghitung frekuensi elemen, dll. - tanda baca dapat mengacaukan rencana Anda

Seringkali, Anda ingin menghapus kata henti, tanda baca, angka, atau beberapa kategori karakter, bergantung pada tujuan akhir Anda.

Dalam tutorial singkat ini, kita akan melihat cara menghapus tanda baca dari sebuah string di Java

Hapus Tanda Baca dari String dengan RegEx (Regular Expressions)

Ekspresi Reguler sangat cocok di sini, baik karena kemungkinan besar akan menjadi bagian dari bagian pemrosesan lainnya, dan karena merupakan pencocokan pola yang efisien. Di Jawa, ekspresi reguler untuk mencocokkan tanda baca adalah \p{Punct} atau singkatan \p{P}

Anda harus menghindari garis miring terbalik pertama dalam sebuah string, jadi menghapus semua tanda baca sama dengan mencocokkannya dan menggantinya dengan karakter kosong

String.replaceAll("\\p{P}", "")

Mari kita terapkan pada kalimat sederhana

String text = "Hi! This is, in effect, a synthetic sentence. It's meant to have several punctuation characters!";
String clean = text.replaceAll("\\p{P}", "");
System.out.println(clean);

Ini menghasilkan

Hi This is in effect a synthetic sentence Its meant to have several punctuation characters

Mari kita lihat karakter apa saja yang diperlakukan sebagai tanda baca di sini

String text = "!#$%&'()*+,-./:;<=>[email protected][]^_`{|}~";
String clean = text.replaceAll("\\p{P}", "");
System.out.println(clean);

Dengan karakter khusus ini - mana yang tersisa setelah tanda baca dihapus?

$+<=>^`|~

Hapus Tanda Baca dari String tanpa RegEx

Jika Anda tidak ingin menggunakan ekspresi reguler, Anda dapat melakukan pemeriksaan manual sambil mengulangi setiap karakter string. Ingatlah untuk menggunakan

String text = "Hi! This is, in effect, a synthetic sentence. It's meant to have several punctuation characters!";
String clean = text.replaceAll("\\p{P}", "");
System.out.println(clean);

String text = "Hi! This is, in effect, a synthetic sentence. It's meant to have several punctuation characters!";
String clean = text.replaceAll("\\p{P}", "");
System.out.println(clean);

String text = "Hi! This is, in effect, a synthetic sentence. It's meant to have several punctuation characters!";
String clean = text.replaceAll("\\p{P}", "");
System.out.println(clean);

String text = "Hi! This is, in effect, a synthetic sentence. It's meant to have several punctuation characters!";
String clean = text.replaceAll("\\p{P}", "");
System.out.println(clean);

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public static String removePunctuations(String s) {
    StringBuffer buffer = new StringBuffer();
    for (Character c : s.toCharArray()) {
        if(Character.isLetterOrDigit(c))
            buffer.append(c);
    }
    return buffer.toString();
}

Mari buat string dan bersihkan

String text = "Hello! \nHere are some special characters: !#$%&'()*+,-./:;<=>[email protected][]^_`{|}~ \nWhere are they? :(\n";
System.out.println(text);
String clean = removePunctuations(text);
System.out.println(clean);

Hello! 
Here are some special characters: !#$%&'()*+,-./:;<=>[email protected][]^_`{|}~ 
Where are they? :(

HelloHerearesomespecialcharactersWherearethey

Meskipun proses ini lebih dapat disesuaikan, proses ini hanya memeriksa huruf dan angka. Anda dapat memeriksa kode karakter secara manual sebagai alternatif, dan hanya mengecualikan beberapa karakter tanda baca saja - dan membiarkannya di spasi putih, ganti baris, dll.

Kesimpulan

Dalam tutorial singkat ini, kita melihat bagaimana Anda dapat menghapus tanda baca atau karakter khusus tertentu dari sebuah string di Java, menggunakan ekspresi reguler atau pemeriksaan manual dalam loop

String text = "Hi! This is, in effect, a synthetic sentence. It's meant to have several punctuation characters!";
String clean = text.replaceAll("\\p{P}", "");
System.out.println(clean);

Diberi string, hapus tanda baca dari string jika karakter yang diberikan adalah karakter tanda baca, seperti yang diklasifikasikan oleh lokal C saat ini. Lokal C default mengklasifikasikan karakter ini sebagai tanda baca.  

! " # $ % & ' ( ) * + , - . / : ; ? @ [ \ ] ^ _ ` { | } ~ 

Contoh.  

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Direkomendasikan. Harap coba pendekatan Anda pada {IDE} terlebih dahulu, sebelum melanjutkan ke solusi

Mendekati. Pertama periksa string input jika terdiri dari tanda baca maka kita harus membuatnya bebas tanda baca. Untuk melakukan ini, kami akan melintasi string, dan jika tanda baca ditemukan, kami akan menghapusnya. Katakanlah input string adalah '$Student@' maka kita harus menghapus $ dan @, selanjutnya kita harus mencetak string polos 'Student' yang bebas dari tanda baca apapun

Algoritma

1. Inisialisasi string input
2. Periksa apakah karakter yang ada dalam string adalah tanda baca atau tidak
3. Jika sebuah karakter adalah tanda baca, maka hapus karakter tersebut dan kurangi indeksnya
4. Cetak string keluaran, yang akan bebas dari tanda baca apa pun

Di bawah ini adalah implementasi dari pendekatan di atas

C++

// CPP program to remove punctuation from a given string

#include <iostream>

using namespace std;

________ 133 _______ _______ 134 _______

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Welcome to GeeksforGeeks

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

________25

$+<=>^`|~

Welcome to GeeksforGeeks

Welcome to GeeksforGeeks

Welcome to GeeksforGeeks

________25

$+<=>^`|~

// CPP program to remove punctuation from a given string1// CPP program to remove punctuation from a given string2

// CPP program to remove punctuation from a given string1// CPP program to remove punctuation from a given string4

________25

$+<=>^`|~

________14

String text = "Hi! This is, in effect, a synthetic sentence. It's meant to have several punctuation characters!";
String clean = text.replaceAll("\\p{P}", "");
System.out.println(clean);

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

________14

String text = "Hi! This is, in effect, a synthetic sentence. It's meant to have several punctuation characters!";
String clean = text.replaceAll("\\p{P}", "");
System.out.println(clean);

________14

String text = "Hi! This is, in effect, a synthetic sentence. It's meant to have several punctuation characters!";
String clean = text.replaceAll("\\p{P}", "");
System.out.println(clean);

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

// CPP program to remove punctuation from a given string_6

Jawa

#include <iostream>_8

#include <iostream>9 using0 using1

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

________25

$+<=>^`|~

Welcome to GeeksforGeeks

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Welcome to GeeksforGeeks

________25

$+<=>^`|~

Welcome to GeeksforGeeks

Welcome to GeeksforGeeks

________25

$+<=>^`|~

________14

String text = "Hi! This is, in effect, a synthetic sentence. It's meant to have several punctuation characters!";
String clean = text.replaceAll("\\p{P}", "");
System.out.println(clean);

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

// CPP program to remove punctuation from a given string_6

int_2

Python3

int_3

int_4

int5 int6

________14

String text = "Hi! This is, in effect, a synthetic sentence. It's meant to have several punctuation characters!";
String clean = text.replaceAll("\\p{P}", "");
System.out.println(clean);

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

________14

String text = "Hi! This is, in effect, a synthetic sentence. It's meant to have several punctuation characters!";
String clean = text.replaceAll("\\p{P}", "");
System.out.println(clean);

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Welcome to GeeksforGeeks

Welcome to GeeksforGeeks

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

// CPP program to remove punctuation from a given string1

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

C#

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

using

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

using

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

using0

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

#include <iostream>9 using5 using6

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

________14

String text = "Hi! This is, in effect, a synthetic sentence. It's meant to have several punctuation characters!";
String clean = text.replaceAll("\\p{P}", "");
System.out.println(clean);

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

// CPP program to remove punctuation from a given string_6

// CPP program to remove punctuation from a given string_6

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Javascript

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

________25

$+<=>^`|~

Welcome to GeeksforGeeks

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Welcome to GeeksforGeeks

________25

$+<=>^`|~

Welcome to GeeksforGeeks

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Welcome to GeeksforGeeks

________25

$+<=>^`|~

________14

String text = "Hi! This is, in effect, a synthetic sentence. It's meant to have several punctuation characters!";
String clean = text.replaceAll("\\p{P}", "");
System.out.println(clean);

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Input : %welcome' to @geeksforgeek<s
Output : welcome to geeksforgeeks

Input : Hello!!!, he said ---and went.
Output : Hello he said and went

Keluaran

Welcome to GeeksforGeeks

Kompleksitas Waktu. O(n2)
Ruang Bantu. O(1)

Artikel ini disumbangkan oleh Aarti_Rathi dan Pramod Kumar. Jika Anda menyukai GeeksforGeeks dan ingin berkontribusi, Anda juga dapat menulis artikel menggunakan tulis. geeksforgeeks. org atau kirimkan artikel Anda ke review-team@geeksforgeeks. org. Lihat artikel Anda muncul di halaman utama GeeksforGeeks dan bantu Geeks lainnya.  

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