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How to locate specific sequences of words in a sentence efficiently


How to locate specific sequences of words in a sentence efficiently

By : user3042471
Date : November 28 2020, 12:01 PM
With these it helps I think this can be achieved by basic string operations. I'll first join all the sequences into single strings and then look for them in the full_text. If found, I'll keep track of them in the output_dict with their start and end index. You can use these indices as you require.
code :

full_text = "hello world this is my problem can you solve it please?"

sequences = [["hello", "world"], ["my", "problem"]]

joined_sequences = [" ".join(sequence) for sequence in sequences]

def find_location(message, seq):
    if seq in message:
        return message.find(seq)
    else:
        return None

output_dict = {}

for sequence in joined_sequences:
    start_index = find_location(full_text, sequence)
    if start_index > -1:
        output_dict[sequence] = [start_index, start_index+len(sequence)]

print(output_dict)

{'hello world': [0, 11], 'my problem': [20, 30]}
for sequence in joined_sequences:
    if sequence in full_text:
        full_text = full_text.replace(sequence, "_".join(sequence.split()))

print(full_text)
hello_world this is my_problem can you solve it please?


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How to extract words from a sentence efficiently in C?

How to extract words from a sentence efficiently in C?


By : user1502394
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , Easy way: Use strtok() or strtok_r to get the first two tokens, which will remove them from the string, so the string itself will be your third token you were looking for.
Hard way: Parse it yourself :(
code :
//#include <string.h>

char input[] ="first second third forth";
char delimiter[] = " ";
char *firstWord, *secondWord, *remainder, *context;

int inputLength = strlen(input);
char *inputCopy = (char*) calloc(inputLength + 1, sizeof(char));
strncpy(inputCopy, input, inputLength);

firstWord = strtok_r (inputCopy, delimiter, &context);
secondWord = strtok_r (NULL, delimiter, &context);
remainder = context;

printf("%s\n", firstWord);
printf("%s\n", secondWord);
printf("%s\n", remainder);

getchar();
free(inputCopy);
How can I replace certain words in a sentence with other words while maintaining the correct capitalization efficiently?

How can I replace certain words in a sentence with other words while maintaining the correct capitalization efficiently?


By : ribbskott
Date : March 29 2020, 07:55 AM
help you fix your problem Here is the code that will do what you want, updated to handle numbers:
code :
NSString *original = @"My computer is on fire at 9:00 AM! What should I do?";
NSString *swapString = @"boss";

NSMutableString *modified = [NSMutableString stringWithCapacity:[original length]];
__block NSUInteger lastCharOffset = 0;

[original enumerateSubstringsInRange:NSMakeRange(0, [original length]) options:NSStringEnumerationByWords // NSStringEnumerationByComposedCharacterSequences // | NSStringEnumerationSubstringNotRequired
    usingBlock:^(NSString *substring, NSRange substringRange, NSRange enclosingRange, BOOL *stop)
        {
            //NSLog(@"SUBSTRING %@", substring);

            NSString *replaceString = substring;
            if([substring length] > 2) {
                unichar origChar = [substring characterAtIndex:0];
                if(![[NSCharacterSet decimalDigitCharacterSet] characterIsMember:origChar]) {
                    replaceString = [[NSCharacterSet uppercaseLetterCharacterSet] characterIsMember:origChar] ? [swapString capitalizedString] : swapString;
                }
            }
            if(substringRange.location) {
                [modified appendString:[original substringWithRange:NSMakeRange(lastCharOffset, substringRange.location-lastCharOffset)]];
            }
            [modified appendString:replaceString];
            lastCharOffset = substringRange.location + substringRange.length;
        } ];
        // Grab any trailing punctuation
        [modified appendString:[original substringWithRange:NSMakeRange(lastCharOffset, [original length] - lastCharOffset)]];
    NSLog(@"Orig: %@", original);
    NSLog(@"Modi: %@", modified);
Orig: My computer is on fire at 9:00 AM! What should I do?
Modi: My boss is on boss at 9:00 AM! Boss boss I do?
Regex to match a sentence which has specific words occurred n times in the sentence

Regex to match a sentence which has specific words occurred n times in the sentence


By : user3914586
Date : March 29 2020, 07:55 AM
will be helpful for those in need To match JOIN you have to range {4} in your regex and end the regex with a ;.
You can use this regex:
code :
$re = '/=\s*"\s*SELECT\s+(?:[^;]+?JOIN){4}[^;]+?;/i';
Replace all occurrence of specific words in a sentence based on an array of words

Replace all occurrence of specific words in a sentence based on an array of words


By : Judith Kantor
Date : March 29 2020, 07:55 AM
will be helpful for those in need You're almost there. The trick is to combine all words into one big regexp to do the replacement just once. \\b's ensure that you actually replacing whole words and not just substrings.
code :
var excludeWords = ["A", "ABOUT", "ABOVE", "ACROSS", "ALL", "ALONG", "AM", "AN", "AND", "ANY", "ASK", "AT", "AWAY", "CAN", "DID", "DIDN'T", "DO", "DON'T", "FOR", "FROM", "HAD", "HAS", "HER", "HIS", "IN", "INTO", "IS", "IT", "NONE", "NOT", "OF", "ON", "One", "OUT", "SO", "SOME", "THAT", "THE", "THEIR", "THERE", "THEY", "THESE", "THIS", "TO", "TWIT", "WAS", "WERE", "WEREN'T", "WHICH", "WILL", "WITH", "WHAT", "WHEN", "WHY"];

var sentence = "The first solution does not work for any UTF-8 alphaben. (It will cut text such as Привіт). I have managed to create function which do not use RegExp and use good UTF-8 support in JavaScript engine. The idea is simple if symbol is equal in uppercase and lowercase it is special character. The only exception is made for whitespace.";

var re = new RegExp(`\\b(${excludeWords.join('|')})\\b`, 'gi');
sentence = sentence.replace(re, "");
console.log(sentence);
How to modify the words in a sentence efficiently using database?

How to modify the words in a sentence efficiently using database?


By : user3463434
Date : March 29 2020, 07:55 AM
I hope this helps you . the solution I got after done some testing on different approaches, using n-grams is a better approach. So in my example above :
sentence = "kena love you"
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