https://code-reference.com/ 2026-06-21T07:52:51+02:00 https://code-reference.com/ https://code-reference.com/ttps://code-reference.com/lib/tpl/dokuwiki/images/favicon.ico text/html 2024-02-16T01:04:00+02:00 https://code-reference.com/java/io/printwriter?rev=1708041840&do=diff ---------- The PrintWriter class is a simple way of writing to files in Java io. It can be used in many ways and offers a great deal of methods inside the class. Some of these are quite common methods throughout the language itself. I will go through them step by step, giving examples for each. Let's get started: text/html 2013-05-27T18:35:18+02:00 https://code-reference.com/java/util/scanner?rev=1369672518&do=diff Reads input from a Keyboard, or a Device CODE_SIGN_IDENTITY --verify --file-list --display -r- Terminal.app example Scanner in java package scanner; import java.util.Scanner; public class Scanner { public static void main(String[] args) { /* Create Scanner Object for the input from the keyboard */ Scanner scan = new Scanner(System.in); double currency, amount, exchangeRate; String currencyName, newCurrency; … text/html 2024-02-16T01:04:50+02:00 https://code-reference.com/c/stdlib.h/realloc?rev=1708041890&do=diff realloc #include <stdlib.h> void *realloc(void *ptr, size_t size); description The realloc() function shall change the size of the memory object pointed to by ptr to the size specified by size. The contents of the object shall remain unchanged up to the lesser of the new and old sizes. If the new size of the memory object would require movement of the object, the space for the previous instantiation of the object is freed. If the new size is larger, the contents of the newly a… text/html 2024-02-16T01:05:42+02:00 https://code-reference.com/c/stdio.h/rename?rev=1708041942&do=diff int rename(const char *old_filename, const char *new_filename); Changes name of file oldname to newname. Returns non-zero on failure. Example Source /* * rename example code * http://code-reference.com/c/stdio.h/rename */ #include <stdio.h> /* including standard library */ //#include <windows.h> /* uncomment this for Windows */ #define FILENAME "test_tmp.txt" int main ( void ) { FILE *tmpfile; char string[20]; tmpfile = fopen(FILENAME, "w"); if (tmpfile == 0 ) { perror("cannot ope… text/html 2014-08-19T02:25:26+02:00 https://code-reference.com/objective-c/examples/uiwebview_using_local_resources?rev=1408407926&do=diff Sometimes you need or want to load a UIWebView displaying content provided with an app. If there is more then one site it might make sense to have an external .css or .js file for all your html content. Whatever, I was facing this problem currently and decided to provide my solution to you. text/html 2024-02-16T01:04:15+02:00 https://code-reference.com/arduino/bitwise_operators/bitwiseand?rev=1708041855&do=diff Bitwise AND (&) The bitwise operators perform their calculations at the bit level of variables. They help solve a wide range of common programming problems. Much of the material below is from an excellent tutorial on bitwise math wihch may be found here. text/html 2024-02-16T01:06:05+02:00 https://code-reference.com/c/dos.h/setdate?rev=1708041965&do=diff struct time setdate( struct time ); description of setdate change the system date #include<stdio.h> #include<conio.h> #include<dos.h> int main(void) { struct date d; printf("Please type in new date ( day, month and year ) as int (ddmmyyyy):"); scanf("%d%d%d",&d.da_day,&d.da_mon,&d.da_year); setdate(&d); printf("System date is now %d/%d/%d\n",d.da_day,d.da_mon,d.da_year); getch(); return 0; } text/html 2017-07-30T01:52:03+02:00 https://code-reference.com/start?rev=1501372323&do=diff Be a part of our community and help to improve this reference. This is a Wiki for all possible programming languages ​​with descriptions and examples. The goal is to create a programming library reference for all the programming languages ​​out there So do not hesitate to add some example code, adjust or correct the content text/html 2018-01-12T07:29:06+02:00 https://code-reference.com/java/datatypes?rev=1515738546&do=diff package datatypes; public class DataTypes { public static void main(String[] args) { // primitiv Datatypes boolean aa = true; // 1 bit char bb = 'A'; // 2 Bytes char cc = 65; // 2 Bytes byte dd = 12; // 1 Byte -128 - +127 short ee = 234; // 2 Bytes -32768 - +32767 int ff = 4711; // 4 Bytes long gg = 34567; // 8 Bytes float hh = 3.14f; // 4 Bytes d… text/html 2013-09-09T09:07:22+02:00 https://code-reference.com/java/io/printstream/write?rev=1378710442&do=diff Writes count or one byte to target stream/buffer. write(int oneByte); write(byte[] buffer, int offset, int length); Language Example try( //Try-with-resource-block FileWriter stream = new FileWriter("output.txt"); // create file BufferedWriter output = new BufferedWriter(stream); ) { output.write("Hello Harddisk"); // Write to Stream //This is an auto-closable block so no need of "output.close();" } … text/html 2014-11-06T02:05:30+02:00 https://code-reference.com/c/graphics.h/setviewport?rev=1415235930&do=diff setviewport Syntax of setviewport #include <graphics.h> void setviewport(int left, int top, int right, int bottom, int clip); Description of setviewport setviewport establishes a new viewport for graphics output. The viewport corners are given in absolute screen coordinates by (left,top) and (right,bottom). The current position (CP) is moved to (0,0) in the new window. The parameter clip determines whether drawings are clipped (truncated) at the current viewport boundaries. If clip is n… text/html 2013-04-10T10:14:10+02:00 https://code-reference.com/java/util/scanner/nextint?rev=1365581650&do=diff public int nextInt() return int scanned from the input example nextInt in java package scanner; import java.util.Scanner; public class Scanner { public static void main(String[] args) { /* Create Scanner Object for the input from the keyboard */ Scanner scan = new Scanner(System.in); int currency; System.out.print("Please enter a number: "); currency = scan.nextInt(); // read currency System.… text/html 2014-05-30T21:51:53+02:00 https://code-reference.com/objective-c/foundation.framework/nsdictionary.h/initwithobjectsandkeys?rev=1401479513&do=diff initWithObjectsAndKeys - (instancetype)initWithObjectsAndKeys:(id)firstObject, (NSString*)firstKey, ... Initializes a newly allocated dictionary with entries constructed from the specified set of values and keys. Return Value - NSDictionary text/html 2013-04-10T10:14:55+02:00 https://code-reference.com/java/util/scanner/nextshort?rev=1365581695&do=diff public short nextShort() return short scanned from the input example nextShort() in java package scanner; import java.util.Scanner; public class Scanner { public static void main(String[] args) { /* Create Scanner Object for the input from the keyboard */ Scanner scan = new Scanner(System.in); short currency; System.out.print("Please enter a number: "); currency = scan.nextShort(); // read keyboard buffer … text/html 2013-04-10T15:55:29+02:00 https://code-reference.com/java/control_structures/switch?rev=1365602129&do=diff The switch statement is a multi-select control structure. An expression is evaluated once and compared to 'constants'. In case of equality, the 'statements' that come after the 'constant' are processed. In switch 'statements' can only ordinary data types (ie, 'int', 'long', char, short, etc.) can be used. text/html 2013-04-26T10:02:18+02:00 https://code-reference.com/java/classes/extends?rev=1366963338&do=diff extends extends an already existing class with custom methods package myclass.mydate; import java.util.Date; /* * extends Date = extends class java.util.Date * java.util.Date must be importet */ public class MyDate extends Date { public int getFullYear() { return this.getYear() + 1900; } // overrride the method getMonth from java.util.Date @Override public int getMonth() { return 99; } } text/html 2013-04-10T10:13:54+02:00 https://code-reference.com/java/util/scanner/nextfloat?rev=1365581634&do=diff public float nextFloat() return float scanned from the input example nextFloat in java package scanner; import java.util.Scanner; public class Scanner { public static void main(String[] args) { /* Create Scanner Object for the input from the keyboard */ Scanner scan = new Scanner(System.in); float currency; System.out.print("Please enter a number: "); currency = scan.nextFloat(); // read currency … text/html 2017-07-31T22:37:05+02:00 https://code-reference.com/wiki/syntax?rev=1501533425&do=diff DokuWiki supports some simple markup language, which tries to make the datafiles to be as readable as possible. This page contains all possible syntax you may use when editing the pages. Simply have a look at the source of this page by pressing the Edit this page button at the top or bottom of the page. If you want to try something, just use the playground page. The simpler markup is easily accessible via quickbuttons, too. text/html 2014-08-21T18:09:48+02:00 https://code-reference.com/c/stdio.h/printf?rev=1408637388&do=diff printf #include <stdio.h> /* including standard library */ //#include <windows.h> /* uncomment this for Windows */ int printf ( const char * restrict format, ... ); Arguments The function printf prints format to STDOUT Code Description %c character value %s string of characters %d signed integer %i signed integer %f floating point value %e scientific notation, with a lowercase “e” %E scientific notation, with a uppercase “E” %g use %e or %f %G use %E or %f %o octa… text/html 2013-04-18T09:11:21+02:00 https://code-reference.com/java/loops/for?rev=1366269081&do=diff for ( init; condition; increment ){ statements; } description of for a for loop do statements while the condition is true/untrue, the increment counts the loop, it is possible to use more than 1 condition in the for loop example 1 of for in java package codereferececomjava; public class CodeRefereceComJava { public static void main(String[] args) { int myOtherCount=5; for (int i = 0; i <= myOtherCount; i++) { System.out.print… text/html 2013-02-03T20:35:58+02:00 https://code-reference.com/c/mysql/mysql.h/mysql_init?rev=1359920158&do=diff MYSQL *mysql_init(MYSQL *mysql) description of mysql_init allocates / initializes a MYSQL object and returns a new object #include <stdio.h> /* including standard library */ //#include <windows.h> /* uncomment this for Windows */ #include <mysql/mysql.h> MYSQL *my; int main( void ){ char host[20]; char user[20]; char pass[20]; my = mysql_init(NULL); sprintf(host,"localhost"); sprintf(user,"root"); sprintf(pass,"yourpass"); if (my == NULL ) { printf("Cant initalisize MySQL\n"); … text/html 2013-02-28T01:21:08+02:00 https://code-reference.com/c/mysql/mysql.h/mysql_escape_string?rev=1362010868&do=diff unsigned long mysql_escape_string(MYSQL *mysql, char *to, const char *from, unsigned long length) description of mysql_escape_string mysql_escape_string escape a mysql string ” will be escaped ; will not be escaped ! mysql_escape_string is outdated use mysql_real_escape_string instead ! text/html 2015-05-06T20:01:20+02:00 https://code-reference.com/c/graphics.h/setcolor?rev=1430935280&do=diff text/html 2013-04-10T10:14:40+02:00 https://code-reference.com/java/util/scanner/nextlong?rev=1365581680&do=diff public long nextLong() return long scanned from the input example nextLong() in java package scanner; import java.util.Scanner; public class Scanner { public static void main(String[] args) { /* Create Scanner Object for the input from the keyboard */ Scanner scan = new Scanner(System.in); long currency; System.out.print("Please enter a number: "); currency = scan.nextLong(); // read keyboard buffer … text/html 2024-02-16T01:05:51+02:00 https://code-reference.com/c/graphics.h/imagesize?rev=1708041951&do=diff imagesize Syntax of imagesize #include <graphics.h> unsigned imagesize(int left, int top, int right, int bottom); Description of imagesize imagesize determines the size of the memory area required to store a bit image. If the size required for the selected image is greater than or equal to 64K - 1 bytes, imagesize returns 0xFFFF (-1). text/html 2013-04-10T10:35:55+02:00 https://code-reference.com/java/control_structures/if?rev=1365582955&do=diff if ( condition == true ){ command; } check if a condition is true or false example of if in java package plausibilitycheck; import java.util.Scanner; public class Plausibilitycheck{ /** * @param args the command line arguments */ public static void main(String[] args) { int celsius; double fahrenheit; Scanner scan = new Scanner(System.in); System.out.print("Please type in Celsius : "); celsius = scan.nextInt(); … text/html 2024-02-16T01:12:23+02:00 https://code-reference.com/objective-c/foundation.framework/nsvalue.h/valuewithcgpoint?rev=1708042343&do=diff valueWithCGPoint + (NSValue *)valueWithCGPoint:(CGPoint)point; Creates and returns an NSValue object that contains the value of a CGPoint. Return Value - A new NSValue object. ObjC Sourcecode Example // ** Sample datatype ** CGPoint aPoint = CGPointMake(150.0f, 200.0f); // ** Create nsvalue object ** NSValue *cgPointValue = [NSValue valueWithCGPoint:aPoint]; // ** Output ** NSLog(@"%@", cgPointValue); text/html 2013-02-23T18:10:45+02:00 https://code-reference.com/c/string.h/strtok?rev=1361639445&do=diff #include <stdlib.h> char *strtok(char *str1, const char *str2); description of strtok Function strtok breaks a string (str1) into individual strings based on the so-called token. The string is separated by one delimiter (str2). “str2” may contain multiple tokens, e.g. str2 = “\ n” (ie separation in space, comma, New Line, Point). text/html 2013-02-17T03:02:49+02:00 https://code-reference.com/c/string.h/strxfrm?rev=1361066569&do=diff #include <stdlib.h> size_t strxfrm(char *str1, const char *str2, size_t n); description of strxfrm The function strxfrm () transforms a null-terminated C string according to local settings. Thus the string can be safely compared using strcmp () with another. The transformed string is stored in a new string. text/html 2013-04-17T08:11:25+02:00 https://code-reference.com/java/variables/array?rev=1366179085&do=diff an array, it is a object variable (box,container), which is a variable in a position to take up more than one object of the same type and manage it example of arrays in java package arrays; public class Arrays { public static void main(String[] args) { int[] digits1; // Reference Variable int[] digits2= new int[5]; // Definition with 5 x Integer int[] digits3= {1,2,3,4,5}; // Definie with initialization ( 5 Integer) // pass Element… text/html 2024-02-16T01:12:02+02:00 https://code-reference.com/java/io/printstream/append?rev=1708042322&do=diff Appends a CharSequence append(char): PrintStream append(CharSequence): PrintStream append(CharSequence, int start, int end): PrintStream return value: PrintStream Language Example int i = 42; StringBuffer buf = new StringBuffer(42); buf.append(i); buf.append(" is a answer to a nice question"); System.out.println(buf); text/html 2024-02-16T01:12:23+02:00 https://code-reference.com/objective-c/foundation.framework/nsvalue.h/valuewithcgsize?rev=1708042343&do=diff valueWithCGSize + (NSValue *)valueWithCGSize:(CGSize)size; Creates and returns an NSValue object that contains the value of a CGSize. Return Value - A new NSValue object. ObjC Sourcecode Example // ** Sample datatype ** CGSize aSize = CGSizeMake(150.0f, 200.0f); // ** Add the value to nsvalue object ** NSValue *cgSizeValue = [NSValue valueWithCGSize:aSize]; // ** Output ** NSLog(@"%@", cgSizeValue); text/html 2024-02-16T01:12:23+02:00 https://code-reference.com/objective-c/foundation.framework/nsvalue.h/valuewithcgrect?rev=1708042343&do=diff valueWithCGRect + (NSValue *)valueWithCGRect:(CGRect)rect; Creates and returns an NSValue object that contains the value of a CGRect. Return Value - A new NSValue object. ObjC Sourcecode Example //** Sample datatype ** CGRect aRect = CGRectMake(0.0f, 0.0f, 150.0f, 200.0f); // ** Create nsvalue object ** NSValue *cgRectValue = [NSValue valueWithCGRect:aRect]; // ** Output ** NSLog(@"%@", cgRectValue); text/html 2013-04-15T09:30:44+02:00 https://code-reference.com/java/io/printstream/format?rev=1366011044&do=diff format args to the format string format and write the result to the stream format(String format, Object... args); return value: stream sign Description 0 if the place is not busy they prints a 0 # if the place is not busy they prints nothing . decimal separator Separates and decimal places. , Groups the numbers (a group is as large as the distance from ”,” to ”.”). ; Delimiter. To the left of the pattern is positive, the right for negative numbers. - The default character for the negative… text/html 2024-02-16T01:12:24+02:00 https://code-reference.com/objective-c/foundation.framework/nsstring.h/stringbyappendingstring?rev=1708042344&do=diff stringByAppendingString -(NSString *)stringByAppendingString:(NSString *)aString; Returns a new string made by appending a given string to the receiver. ObjC Sourcecode Example NSString *cycle=@"Pass"; for(int a=0; a<5; a++) { NSString *intValue=[NSString stringWithFormat:@"%i", a]; cycle=[cycle stringByAppendingString:intValue]; NSLog(@"%@", cycle); } text/html 2013-04-18T08:50:47+02:00 https://code-reference.com/java/lang/string/toarray?rev=1366267847&do=diff public char[] toCharArray() description of toCharArray() converts a string to a new character array example of toCharArray in java package codereferececomjava; public class CodeRefereceComJava { public static void main(String[] args) { String str = "some Text"; char[] text; System.out.println(str); // print the String text = str.toCharArray(); for (int i = 0; i <= text.length - 1; i++) { System.out.printl… text/html 2024-02-16T01:03:58+02:00 https://code-reference.com/java/control_structures/else?rev=1708041838&do=diff if ( condition == true ){ command; } else { // if the "if" condition false command; } check if a condition is true or false example of else package plausibilitycheck; import java.util.Scanner; public class Plausibilitycheck{ /** * @param args the command line arguments */ public static void main(String[] args) { int celsius; double fahrenheit; Scanner scan = new Scanner(System.in); System.out.print("Please … text/html 2024-02-16T01:05:55+02:00 https://code-reference.com/c/graphics.h/setbkcolor?rev=1708041955&do=diff setbkcolor Syntax of setbkcolor #include <graphics.h> void setbkcolor(int color); Description of setbkcolor setbkcolor sets the background to the color specified by color. The argument color can be a name or a number as listed below. (These symbolic names are defined in graphics.h.) Name Value BLACK 0 BLUE 1 GREEN 2 CYAN 3 RED 4 MAGENTA5 BROWN 6 LIGHTGRAY 7 DARKGRAY 8 LIGHTBLUE 9 LIGHTGREEN 10 LIGHTCYAN 11 LIGHTRED 12 LIGHTMAGENTA 13 YELLOW 14 WHITE 15 Fo… text/html 2024-02-16T01:04:50+02:00 https://code-reference.com/c/stdlib.h/sizeof?rev=1708041890&do=diff “New” sizeof #include <stdlib.h> int sizeof(VALUE); sizeof operator returns the number of bytes to be reserved for a variable or a data type. C Sourcecode Example #include <stdio.h> /* including standard library */ #include <stdlib.h> //#include <windows.h> /* uncomment this for Windows */ int main(void){ printf("int: %d bytes\n", sizeof(int) ); printf("Hello World: %d bytes\n", sizeof("Hello World") ); return 0; } text/html 2013-02-17T01:47:43+02:00 https://code-reference.com/c/string.h/strrchr?rev=1361062063&do=diff strrchr #include <stdlib.h> char *strrchr(const char *str, int c); description of strrchr strrchr () is a string function that finds the last occurrence of a character in a string. As a result, the pointer comes to this character or the null pointer if this character is not found. text/html 2017-07-30T01:49:38+02:00 https://code-reference.com/playground/c/stdio.h/printf?rev=1501372178&do=diff printf #include <stdio.h> /* including standard library */ //#include <windows.h> /* uncomment this for Windows */ int printf ( const char * restrict format, ... ); Arguments The function printf prints format to STDOUT Code Description %c character value %s string of characters %d signed integer %i signed integer %f floating point value %e scientific notation, with a lowercase “e” %E scientific notation, with a uppercase “E” %g use %e or %f %G use %E or %f %o octa… text/html 2024-02-16T01:05:51+02:00 https://code-reference.com/c/graphics.h/setallpalette?rev=1708041951&do=diff setallpalette Syntax of setallpalette #include <graphics.h> void setallpalette(struct palettetype *palette); Description of setallpalette setallpalette sets the current palette to the values given in the palettetype structure pointed to by palette. You can partially (or completely) change the colors in the EGA/VGA palette with setallpalette. The MAXCOLORS constant and the palettetype structure used by setallpalette are defined in graphics.h as follows: #define MAXCOLORS 15 struct pale… text/html 2024-02-16T01:12:19+02:00 https://code-reference.com/objective-c/foundation.framework/nsdictionary.h/allkeys?rev=1708042339&do=diff allKeys - (NSArray *)allKeys Returns a new array containing the dictionary’s keys, or an empty array if the dictionary has no entries. Return Value - NSArray ObjC Sourcecode Example // ** Init dictionary with entries NSDictionary *myDictionary = [[NSDictionary alloc]initWithObjectsAndKeys:@"value1", @"key1", @"value2", @"key2", nil]; NSArray *keysArray = [myDictionary allKeys]; // ** Output dictionary keys NSLog(@"myDictionary all keys: %@", keysArra… text/html 2024-02-16T01:05:53+02:00 https://code-reference.com/c/graphics.h/putimage?rev=1708041953&do=diff putimage Syntax of putimage #include <graphics.h> void putimage(int left, int top, void *bitmap, int op); Description of putimage putimage puts the bit image previously saved with getimage back onto the screen, with the upper left corner of the image placed at (left,top). bitmap points to the area in memory where the source image is stored. The op parameter to putimage specifies a combination operator that controls how the color for each destination pixel onscreen is computed, based on … text/html 2013-04-10T10:13:38+02:00 https://code-reference.com/java/util/scanner/nextdouble?rev=1365581618&do=diff public double nextDouble() double scanned from the input example nextDouble in java package scanner; import java.util.Scanner; public class Scanner { public static void main(String[] args) { /* Create Scanner Object for the input from the keyboard */ Scanner scan = new Scanner(System.in); double currency, amount, exchangeRate; String currencyName, newCurrency; System.out.print("Please enter the amount (with d… text/html 2013-04-10T10:14:25+02:00 https://code-reference.com/java/util/scanner/nextline?rev=1365581665&do=diff public String nextLine() return the scanned content from the input example nextLine() in java package scanner; import java.util.Scanner; public class Scanner { public static void main(String[] args) { /* Create Scanner Object for the input from the keyboard */ Scanner scan = new Scanner(System.in); String line; System.out.print("Please enter what you want: "); line = scan.nextLine(); // read keyboard buffer …