For static strings, putting an r in front of the string would give the raw string (e.g. r'some \' string'). Since it is not possible to put r in front of a string variable, what is the minimal approach to dynamically convert a string variable to its raw form? Should I manually substitute all backslashes with double backslashes?
str_var = u"some text with escapes e.g. \( \' \)"
raw_str_var = ???
I've got a URL as a string, for example:
http://ift.tt/1Dout16
I'd like to add another subfolder to it with PHP, before hello, so it should look like this:
http://ift.tt/1C784y4
I thought about using explode to separate the URL by slashes, and adding another one before the last one, but I'm pretty sure I over complicate it. Is there an easier way?
I am trying to write a Query to find if a string contains part of the value in Column (Not to confuse with the query to find if a column contains part of a string). Say for example I have a column in a table with values ABC,XYZ. If I give search string ABCDEFG then I want the row with ABC to be displayed. If my search string is XYZDSDS then the row with value XYZ should be displayed
I have a big file and I want to do some „operations” on it.(find some text, check if some text exists, get the offset of some text, maybe changing the file).
My current aproach is this:
public ResultSet getResultSet(String fileName) throws IOException {
InputStream in = new FileInputStream(fileName);
byte[] buffer = new byte[CAPACITY];
byte[] doubleBuffer = new byte[2 * CAPACITY];
long len = in.read(doubleBuffer);
while (true) {
String reconstitutedString = new String(doubleBuffer, 0 ,doubleBuffer.length);
//...do stuff
ByteArrayOutputStream os = new ByteArrayOutputStream();
os.write(doubleBuffer, CAPACITY, CAPACITY);
readUntilNow += len;
len = in.read(buffer);
if (len <= 0) {
break;
}
os.write(buffer, 0, CAPACITY);
doubleBuffer = os.toByteArray();
os.close();
}
in.close();
return makeResult();
}
I would like to change the String reconstitutedString into something else. What would be the best alternative considering I want to be able to get some information about the content of that data, information that I may get calling an IndexOf on a String
I have this string:
[25-03-15, 1236], [26-03-15, 3000], [27-03-15, 3054], [30-03-15, 4000]
I want to get two parts from it as below:
['25-03-15','26-03-15','27-03-15','30-03-2015']
and
[1236,3000,3054,4000]
Please guide me how I can perform this task.
PS: I am working of view page of codeigniter.
I'm getting the first thing as:
<?php
$usd=$this->db->query('select transaction_date, SUM(amount) as total
from transactions GROUP BY transaction_date')->result_array();
$str = '';
for($i=0; $i<count($usd); $i++){
if($i!=0){
$str = $str.', ['.date('d-m-y', strtotime($usd[$i]["transaction_date"])).', '.$usd[$i]["total"].']';
}else{
$str = $str.'['.date('d-m-y', strtotime($usd[$i]["transaction_date"])).', '.$usd[$i]["total"].']';
}
}
echo $str;
?>
Can somebody explain why this program outputs ZYx321cBa instead of: aBc123xYZ
I dont seem to understand why. I notice when the recursion is called at the end of the method, it prints properly, but not when recursion is called first.
public class R {
public static void main(String[] args) {
String str ="aBc123xYZ";
Rc rev = new Rc(str);
rev.raC(0);
}
}
Second class, that prints the string based on the index entered in previous class
class Rc {
String s;
int lc = 0;
Rc(String s) {
this.s = s;
}
void raC(int index) {
if (index != s.length()) {
raC(index + 1);
//System.out.println(index);
System.out.println(s.charAt(index) + " ");
if(Character.isLowerCase(s.charAt(index))) {
lc ++;
}
}
if (index == 0) {
System.out.println(":" + lc);
}
}
}
I want to read a text file and process it's data.so for example the input file will look like :
john,judd,134
Kaufman,kim,345
then the program should parse and store these data in form of a JSON file so it will be organized for further processing.I'm using JSON-simple for this task .and this is a prototype code I've written:
package com.company;
import org.json.simple.JSONObject;
import java.io.*;
public class Main {
static JSONObject jsonObject = new JSONObject();
static String output;
public static void main(String[] args) throws IOException {
read("/Users/Sepehr/Desktop/JSONexample.txt");
write("/Users/Sepehr/Desktop/JSONexampleout,txt");
}
public static String read(String filenameIn) throws IOException {
BufferedReader bufferedReader = new BufferedReader(new FileReader(filenameIn));
String s ;
while ( (s = bufferedReader.readLine() ) != null)
{
String[] stringsArr = s.split(",");
jsonObject.put( "famname" , stringsArr[0] );
jsonObject.put("name" , stringsArr[1]);
jsonObject.put("id", stringsArr[2]);
bufferedReader.close();
}
return output=jsonObject.toJSONString();
}
public static String write(String filenameOut) throws FileNotFoundException {
PrintWriter printWriter = new PrintWriter(filenameOut);
printWriter.write(jsonObject.toJSONString());
printWriter.close();
String se = "yaaayyy :|";
return se;
}
}
after running the program these are the exceptions I get:
Exception in thread "main" java.io.IOException: Stream closed
at java.io.BufferedReader.ensureOpen(BufferedReader.java:97)
at java.io.BufferedReader.readLine(BufferedReader.java:292)
at java.io.BufferedReader.readLine(BufferedReader.java:362)
at com.company.Main.read(Main.java:30)
at com.company.Main.main(Main.java:18)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140)
what is wrong exactly ?
and how should make a better design for this program ?
