Text reading is an integral component in our counting algorithms, and it is also ubiquitous in daily applications. The following is a very bad algorithm for reading from a text file, although it is correct and straightforward. It reads from a file line by line, and concatenate them into text. Then we split it using a regular expression. The split part is fast in linear complexity (we will learn it in Comp-2140), hence that is not our concern. Note that trim() is needed to remove empty strings. static String [] readTextBAD(String PATH) throws Exception { BufferedReader br=new BufferedReader (new FileReader(PATH)); String text=""; String line=""; while ((line=br.readLine ())!=null) text=text+" "+line.trim(); String tokens []=text.trim ().split("[^a-zA-Z]+"); return tokens; } Timo oomplovitu of nogdT +RAD
Text reading is an integral component in our counting algorithms, and it is also ubiquitous in daily applications. The following is a very bad algorithm for reading from a text file, although it is correct and straightforward. It reads from a file line by line, and concatenate them into text. Then we split it using a regular expression. The split part is fast in linear complexity (we will learn it in Comp-2140), hence that is not our concern. Note that trim() is needed to remove empty strings. static String [] readTextBAD(String PATH) throws Exception { BufferedReader br=new BufferedReader (new FileReader(PATH)); String text=""; String line=""; while ((line=br.readLine ())!=null) text=text+" "+line.trim(); String tokens []=text.trim ().split("[^a-zA-Z]+"); return tokens; } Timo oomplovitu of nogdT +RAD
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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