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How do you convert a string to a byte array and visa versa?

Sun Microsystems
Java.lang.String has certain utilities to convert a string into a byte array and visa versa. A string can be converted correctly and fully into a byte array by using a character encoding such as UTF-8, US-ASCII. All the overloaded String.getBytes() methods will convert a string into a byte array. Some of these methods take an encoding identifier as an argument, while others take no arguments and will use the platform's default encoding to convert the string.

How to convert an int to a char array or C++ string?

Tech Talk about C++ and C Issues / Comeau C++ and C FAQ
How to add a float (or "any" type really) to the end of a C++ string? Unlike routines like atoi mentioned in the previous question, there is no direct routine such as itoa available. However, similar to the string I/O routines in the previous question, one can do this: #include <stdio.h> // cstdio in C++ // .. See similar questions...

How can I convert an INT into CHAR*/STRING or vice versa?

Beginner FAQ - GPWiki
This is something you do a lot in programming and pretty much every language makes it easy to convert between types. You may have already printed integers to the console with COUT or PRINTF, which of course needs to be converted to a string first. Converting numbers to strings is done in a similar way. Boost is a C++ library that can help you with problems like these and many others. See similar questions...

Can I convert my boiler from Oil to Gas or visa-versa?

Desco Energy
The simple answer is no. While some boilers can be converted by replacing the existing burner with a substitute burner this is a project strictly limited to professionals and not to be undertaken as a do it yourself project under any circumstances. Please bear in mind that most boilers are designed to accommodate the characteristics of the intended fuel. A boiler that is designed to burn natural gas (a vapor) utilizes burners that simply cannot burn No. 2 fuel oil (an atomized liquid). See similar questions...

How do I convert a string to a number?

Updating the For Beginners forum FAQ - GameDev.Net Discussio...
I am including the header file <string>, and I am using the string class, but the code doesn't compile? (namespace resolution, having the std:: topics) How do I use unique() with vectors? (answered only once, but still a good question to have due to people not knowing that it's possible to do) See similar questions...

Is Bioheat® fuel the same as Biodiesel, or visa versa?

Biodiesel.org - Home Heating Oil
NO. Biodiesel is the term for the pure biodiesel, B100. Bioheat® fuel is conventional heating oil containing biodiesel. NO. Biodiesel is produced from raw vegetable oils or animal fats, but the oil or fat must go through the chemical reaction (called transesterification) to make it into biodiesel and be tested to make sure it meets D 6751 before it is blended with heating oil. See similar questions...

How do I convert a common date to a Jewish date or vice versa?

Frequently Asked Questions
Simply use the dropdown lists to specify the common or Jewish date that you want. That's it -- no "compute" button to press. The answer will appear instantaneously in the other fields. See similar questions...

How do I convert from US to UK measures, and vice-versa?

The Brew Shop - Frequently Asked Questions
That is to say, for all units above the ounce, the Imperial or British variant is almost exactly 20% larger than the corresponding US unit. See similar questions...

How to convert the datetime into a string for use in the SQL ' statement?

Megasolutions.net :: Asp.Net Frequently Asked Questions - FA...
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load Private Sub ddlCulture_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ddlCulture.SelectedIndexChanged See similar questions...

How do I convert an integer to a string representation?

CSC 209 Summer 2006
Well, printf does it for output, so look at its related function named sprintf that "prints formated output to a string." See similar questions...

How can I convert an integer or a float to a string?

Frequently Asked Questions
It's easy. Use sprintf. For example: char string1[50]; char string2[50]; short int var1; float var2; ... sprintf (string1, "%d", var1); sprintf (string2, "%f", var2); See similar questions...

How can I convert from string to int ?

C++ corner
You want to make a function that converts from a type to another. Like from std::string to int, or the other way around. This can be done using std::stringstream and insertion / extraction operators. Just as above, templates will prove of great help: Its usage is not as straightforward as the above explained max template. Normally, you would want to call it like "int value = lexical_cast( myStdString );". There is, however, a problem. See similar questions...

How do I convert a std::string to a number?

Miscellaneous technical issues, C++ FAQ Lite
There are two easy ways to do this: you can use the <cstdio> facilities or the <iostream> library. In general, you should prefer the <iostream> library. See similar questions...

How do I convert a string into an internet address?

Programming UNIX Sockets in C - Frequently Asked Questions: ...
If you are reading a host's address from the command line, you may not know if you have an aaa.bbb.ccc.ddd style address, or a host.domain.com style address. What I do with these, is first try to use it as a aaa.bbb.ccc.ddd type address, and if that fails, then do a name lookup on it. Here is an example: Converts ascii text to in_addr struct. NULL is returned if the address can not be found. See similar questions...

Will I experience any problems storing an array of bytes (byte[]) in my tuple?

FAQ - TSpaces - Computer Science Research at Almaden
No, you'll not. Java treats an array as a serialiazable object so it is a valid Field value. Here is a fragment of code that I wrote to verify that TSpaces can store very long arrays of byte. for ( int s = 1; s<999; s++) { System.out.println( s ); byte h[] = new byte[ s*1000 ]; for( int i=0;i< s*1000; i++) { h[i] = 65; } String key = "hello"+s; Tuple t = new Tuple(key, h ); ts.write( t ); Tuple template = new Tuple(key,new Field(byte[].class)); Tuple t2 = ts.read(template); System.out. See similar questions...

How to convert byte[0]=2 byte[1]=1 to its corresponding short value?

JavaChina: SCJP Questions & Answers by Roseanne Zhang (8...
You are not allowed using byte as your array name, since it is a reserved word. Let's change it to b[] See similar questions...

How do I convert a string to an int etc?

FAQ for the microsoft.public.languages.csharp newsgroup
In general, when you want to convert from one type to another, the first class to look at is System.Convert. It has a load of static methods which are likely to help you. If you're converting from a String, you could also check whether the type that you want to convert to has a Parse method or something similar - for instance, I usually use DateTime.ParseExact to convert from a String to a DateTime. See similar questions...

How do I convert a string to all upper or lower case?

Library Functions
Some libraries have routines strupr and strlwr or strupper and strlower, but these are not Standard or portable. It's a straightforward exercise to write upper/lower-case functions in terms of the toupper and tolower macros in <ctype.h>; see also question 13.5. (The only tricky part is that the function will either have to modify the string in-place or deal with the problem of returning a new string; see question 7.5a. See similar questions...

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