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Why does this print the wrong part of the string?


Why does this print the wrong part of the string?

By : tarasch825
Date : September 23 2020, 11:00 AM
around this issue You change the start position only in the function. However, when printing you are still passing the original head of the string to printf.
Try passing name+3 to printf .
code :

    int main(int argc, char *argv[])
    {
     char name[16];
    // allocated a buffer of 16 bytes on the stack (called name)
    // note that an array of chars and a pointer to a char is NOT the same thing
     strcpy(name, "Tessier-Lavigne");
    // copies from a const null-terminated string 
    // now char* name contains
    // ['T','e','s','s','i','e','r','-','L','a','v','i','g','n','e','\0']
     buggy_substring(name, 3, 2);
    // name is passed as an immutable number "by value", 
    // the value of name is not changed
    // however, the contents name points to can be
    // now name is
    // ['T','e','s','s','\0','e','r','-','L','a','v','i','g','n','e','\0']


     printf("%s\n", name);
    //output 'T','e','s','s' + new line
     return 0;
    } 



    void buggy_substring(char *input, size_t pos, size_t len)
    {
    //local pointer input
    // points to ['T','e','s','s','i','e','r','-','L','a','v','i','g','n','e','\0']
    //pos=3
    //len=2
     input += pos;
    // input points to 's' (original name still points to 'T'

     input[len] = '\0';
    //equivalent code
     char * p=input;
     p+=len;
     *p='\0';
    // input+2 points to 'i'
    // 'i' is replaced with zero
    // the original buffer looks like
    //['T','e','s','s','\0','e','r','-','L','a','v','i','g','n','e','\0']
    } 



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Python - In a string find a character and print remaining part of string in a new line

Python - In a string find a character and print remaining part of string in a new line


By : Anthony
Date : March 29 2020, 07:55 AM
This might help you You can use re.sub:
Demo:
code :
>>> strs = "abc+bcd+cdf"
>>> re.sub(r'\+|;','\n',strs)
'abc\nbcd\ncdf'
>>> import re
>>> with open('abc') as f:
...     for line in f:       
...         line = re.sub(r'\+|;','\n',line.strip())
...         print line                              
...                                                 
abc
abc
bcd
cdf
adf
asfg
How to search in a list for a part of a string and print out the whole string?

How to search in a list for a part of a string and print out the whole string?


By : gelvin fendra
Date : March 29 2020, 07:55 AM
I hope this helps . You have to use foreach to get the element form your lest and then do your comparison.
If you use namebirthday.contains then this will won't work for input is like "Eric".
code :
for(String currentString : namebirthday){
    if (currentString.toLowerCase().contains(x.toLowerCase())){ 
        System.out.println(currentString );
    } else {
        System.out.println("x" +"is not found" );
    }
}
Print a part of string that made a string match regex

Print a part of string that made a string match regex


By : DORSEy Tang
Date : March 29 2020, 07:55 AM
How can I print part of String in Java? e.g.: The string is "Application No: ABCD" and I just want to print on

How can I print part of String in Java? e.g.: The string is "Application No: ABCD" and I just want to print on


By : Nopall Shoull
Date : March 29 2020, 07:55 AM
around this issue How can I print part of String in Java? e.g.: The string is "Application No: ABCD" and I just want to print only ABCD? , You can split te string from ":",
code :
    String yourstr = "Application No: ABCD";
    String[] words= yourstr.split(":");
    System.out.println(words[1]);
Python: print a string spanning to a given width, but first part left-aligned and second part right-aligned

Python: print a string spanning to a given width, but first part left-aligned and second part right-aligned


By : Anne
Date : March 29 2020, 07:55 AM
Does that help assuming you know the width of the line you can use '{:n}'.format(string) to fill the string up to n-length with spaces. This does not shorten the string if it is longer than n, as you state will never be the case.
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