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string concatenation using streams returns junk


string concatenation using streams returns junk

By : user2948218
Date : November 14 2020, 04:48 PM
Hope this helps The char pointer returned by string::c_str() is only valid for the lifetime of the string (and only when it is not modified).
But stream.str() returns a temporary string object, which you need to store somewhere. Otherwise it will be destroyed after that exact statement you call that function.
code :
string result = stream.str();
return result.c_str();
return stream.str();


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Java To iOS client streams reading junk characters

Java To iOS client streams reading junk characters


By : Hamza Chaudhry
Date : March 29 2020, 07:55 AM
around this issue rmaddy was right about the problem being how much I'm reading from the stream. Here's the code I'm using now, which no longer reads any junk characters.
code :
- (void)readFromStream{
int BUFFER_LEN = 512;

uint8_t *buffer;
NSUInteger length;
BOOL freeBuffer = NO;
// The stream has data. Try to get its internal buffer instead of creating one
if(![inputStream getBuffer:&buffer length:&length]) {
    // The stream couldn't provide its internal buffer. We have to make one ourselves
    buffer = malloc(BUFFER_LEN * sizeof(uint8_t));
    freeBuffer = YES;
    NSInteger result = [inputStream read:buffer maxLength:BUFFER_LEN];
    length = result;
}

if (buffer != NULL) {
    NSString *s = [[NSString alloc] initWithBytes:buffer length:length encoding:NSASCIIStringEncoding];
    if (s.length>1) {
        CLS_LOG(@"Read: %@",s);
        [self handleRecievedMessage:s];
    }
}

// length bytes of data in buffer
if(freeBuffer) free(buffer);
PHP page returns junk instead of return string in objective-C

PHP page returns junk instead of return string in objective-C


By : Madhuri Dhiman
Date : March 29 2020, 07:55 AM
I wish did fix the issue. yes it's the right way, you have the same result on your NSLog as rigth click on your page and show source code. Your url index.php is in plain text and not interpreted by the server, is why you haven't "Hello, PHP!" as a result.
see php hello world tutorial : http://www.utexas.edu/learn/php/example1.shtml
code :
NSString *urlstr = [[NSString alloc] 
      initWithFormat:@"http://www.utexas.edu/learn/php/ex1.php"];
NSURL *url = [[NSURL alloc] initWithString:urlstr];
cpp string find() doesnt work as expected - returns big junk values

cpp string find() doesnt work as expected - returns big junk values


By : borun
Date : November 11 2020, 09:01 AM
I hope this helps you . What it return is size_t of npos of your string because it can't find your char or text. you can do this instead:
code :
std::size_t found = str.find("findme");

if (found != std::string::npos)
    std:cout << found << std::endl;
else
    std::cout << "String not found" << std::endl // If not found
Smalltalk Pharo String concatenation instead of streams

Smalltalk Pharo String concatenation instead of streams


By : Debabrata Chakrabort
Date : March 29 2020, 07:55 AM
this one helps. It complains because of the part t, i asString that is inside a collection loop (you can look at the actual implementation of the rule in the class RBStringConcatenationRule.
Normally string concatenation is discouraged because it's slower and more memory intense (IIRC about the memory).
code :
| list types |
types := #('a' 'b' 'c').
list := types flatCollect: [ :t | (1 to: 9) collect: [ :i | t , i asString ].
^ Heap withAll: list
AES Algorithm returns junk characters in the middle of my data string

AES Algorithm returns junk characters in the middle of my data string


By : user2036619
Date : March 29 2020, 07:55 AM
Hope this helps I take a data string = "AkhilRanjanBiharabcdefghijklmnopMovedtoChennai18", encrypt it first and then decrypt it. The string which I get back on decryption is "AkhilRanjanBiharÙ†+™¸„À–ýæó@Movedtoñhennai18" which is almost fine for the first 16 and final 16 characters, but the 16 characters in the middle are absolute junk. What can possibly be going wrong? , Your error lies here:
code :
encryptedStr = new String(encrBytes);
strToBeEncoded.getBytes();
encryptedStr = new String(encrBytes, StandardCharsets.ISO_8859_1);
strToBeEncoded.getBytes(StandardCharsets.ISO_8859_1);
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