word-count | 易学教程

Objective-C: -[NSString wordCount]

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问题 What's a simple implementation of the following NSString category method that returns the number of words in self , where words are separated by any number of consecutive spaces or newline characters? Also, the string will be less than 140 characters, so in this case, I prefer simplicity & readability at the sacrifice of a bit of performance. @interface NSString (Additions) - (NSUInteger)wordCount; @end I found the following solutions: implementation of -[NSString wordCount] implementation of

How can we dynamically allocate and grow an array

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问题 I am working on a project, but I cannot use any existing java data structures (ie, ArraysList, trees, etc) I can only use arrays. Therefore, I need to dynamically update an array with new memory. I am reading from a text file, and I pre-allocate 100 for the arrays memory: String [] wordList; int wordCount = 0; int occurrence = 1; int arraySize = 100; wordList = new String[arraySize]; while ((strLine = br.readLine()) != null) { // Store the content into an array Scanner s = new Scanner(strLine

Count the number of all words in a string

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Is there a function to count the number of words in a string? For example: str1 <- "How many words are in this sentence" to return a result of 7. AVSuresh You can use strsplit and sapply functions sapply(strsplit(str1, " "), length) Martin Morgan Use the regular expression symbol \\W to match non-word characters, using + to indicate one or more in a row, along with gregexpr to find all matches in a string. Words are the number of word separators plus 1. lengths(gregexpr("\\W+", str1)) + 1 This will fail with blank strings at the beginning or end of the character vector, when a "word" doesn't

Using SQL to determine word count stats of a text field

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I've recently been working on some database search functionality and wanted to get some information like the average words per document (e.g. text field in the database). The only thing I have found so far (without processing in language of choice outside the DB) is: SELECT AVG(LENGTH(content) - LENGTH(REPLACE(content, ' ', '')) + 1) FROM documents This seems to work* but do you have other suggestions? I'm currently using MySQL 4 (hope to move to version 5 for this app soon), but am also interested in general solutions. Thanks! * I can imagine that this is a pretty rough way to determine this

Regular Expression for accurate word-count using JavaScript

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问题 I'm trying to put together a regular expression for a JavaScript command that accurately counts the number of words in a textarea. One solution I had found is as follows: document.querySelector("#wordcount").innerHTML = document.querySelector("#editor").value.split(/\b\w+\b/).length -1; But this doesn't count any non-Latin characters (eg: Cyrillic, Hangul, etc); it skips over them completely. Another one I put together: document.querySelector("#wordcount").innerHTML = document.querySelector("

WebForms UnobtrusiveValidationMode requires a ScriptResourceMapping for 'jquery'. Please add a ScriptResourceMapping named jquery(case-sensitive)

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I'm building a web application using Visual Studio 2012. I'm attempting to add word count into my textbox. However after adding the the javascript codes and the html codes. I receive the error as stated above. Here is my javascript codeds Code : function validateLimit(obj, divID, maxchar) { objDiv = get_object(divID); if (this.id) obj = this; var remaningChar = maxchar - trimEnter(obj.value).length; if (objDiv.id) { objDiv.innerHTML = remaningChar + " characters left"; } if (remaningChar <= 0) { obj.value = obj.value.substring(maxchar, 0); if (objDiv.id) { objDiv.innerHTML = "0 characters left

How to extract the nth word and count word occurrences in a MySQL string?

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I would like to have a mysql query like this: select <second word in text> word, count(*) from table group by word; All the regex examples in mysql are used to query if the text matches the expression, but not to extract text out of an expression. Is there such a syntax? Brendan Bullen The following is a proposed solution for the OP's specific problem (extracting the 2nd word of a string), but it should be noted that, as mc0e's answer states, actually extracting regex matches is not supported out-of-the-box in MySQL. If you really need this, then your choices are basically to 1) do it in post

How to count words in MySQL / regular expression replacer?

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How can I, in a MySQL query, have the same behaviour as the Regex.Replace function (for instance in .NET/C#)? I need that because, as many people, I would like to count the number of words in a field. However, I'm not satisfied with the following answer (given several times on that site): SELECT LENGTH(name) - LENGTH(REPLACE(name, ' ', '') +1 FROM table Because it doesn't give good results when there are more that one space between two words. By the way, I think the Regex.Replace function may be interesting so all the good ideas are welcome ! There's REGEXP_REPLACE available as MySQL user

Efficiently count word frequencies in python

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问题 I\'d like to count frequencies of all words in a text file. >>> countInFile(\'test.txt\') should return {\'aaa\':1, \'bbb\': 2, \'ccc\':1} if the target text file is like: # test.txt aaa bbb ccc bbb I\'ve implemented it with pure python following some posts. However, I\'ve found out pure-python ways are insufficient due to huge file size (> 1GB). I think borrowing sklearn\'s power is a candidate. If you let CountVectorizer count frequencies for each line, I guess you will get word frequencies

Count the number of all words in a string

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问题 Is there a function to count the number of words in a string? For example: str1 <- \"How many words are in this sentence\" to return a result of 7. 回答1: You can use strsplit and sapply functions sapply(strsplit(str1, " "), length) 回答2: Use the regular expression symbol \\W to match non-word characters, using + to indicate one or more in a row, along with gregexpr to find all matches in a string. Words are the number of word separators plus 1. lengths(gregexpr("\\W+", str1)) + 1 This will fail