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The zip_entry_open() function is used to open a zip archive entry for reading.Syntaxzip_entry_open(zip_file,zip_entry,mode)Parameterszip_file − The zip file to be readzip_entry − The zip entry to open.mode − The type of access needed for zip archiveReturnThe zip_entry_open() function Returns TRUE on success, or FALSE on failure.Example
To check whether a String contains only unicode letters or digits in Java, we use the isLetterOrDigit() method and charAt() method with decision-making statements.The isLetterOrDigit(char ch) method determines whether the specific character (Unicode ch) is either a letter or a digit. It returns a boolean value, either true or false.Declaration −The java.lang.Character.isLetter() method is declared as follows −public static boolean isLetter(char ch)The charAt() method returns a character value at a given index. It belongs to the String class in Java. The index must be between 0 to length()-1.Declaration −The java.lang.String.charAt() method is declared as follows −public char charAt(int index)Let us ... Read More
The zip_open() function opens a zip file for reading. It returns an open zip file on success and FALSE on failure.Syntaxzip_open(zip_file)Parameterszip_file − The path of the file to be opened.ReturnThe zip_open() function returns an open zip file on success and FALSE on failure.ExampleOutputCompressed: 90 Compressed: 12 Compressed: 67
In order to check if a String has only Unicode letters in Java, we use the isDigit() and charAt() methods with decision-making statements.The isLetter(int codePoint) method determines whether the specific character (Unicode codePoint) is a letter. It returns a boolean value, either true or false.Declaration −The java.lang.Character.isLetter() method is declared as follows −public static boolean isLetter(int codePoint)Here, the parameter codePoint represents the character to be checked.The charAt() method returns a character value at a given index. It belongs to the String class in Java. The index must be between 0 to length()-1.Declaration −The java.lang.String.charAt() method is declared as follows −public ... Read More
To lag a column in MySQL, first, let us create a table. The query to create a table is as follows −mysql> create table LagDemo -> ( -> UserId int, -> UserValue int -> ); Query OK, 0 rows affected (1.74 sec)ExampleInsert some records in the table using insert command. The query is as follows −mysql> insert into LagDemo values(12, 158); Query OK, 1 row affected (0.61 sec) mysql> insert into LagDemo values(18, 756); Query OK, 1 row affected (0.21 sec) mysql> insert into LagDemo values(15, 346); Query OK, 1 row affected (0.25 sec) mysql> insert ... Read More
In order to get the hyperbolic tangent of a given value in Java, we use the java.lang.Math.tanh() method. The tanh() method accepts an argument in radians and returns the hyperbolic tan of the argument which acts as the angle.Declaration −The java.lang.Math.tanh() is declared as follows −public static double tanh(double x)where, x is the angle in radians.Let us see a program to get the hyperbolic tangent of a given value in Java.Example Live Demoimport java.lang.Math; public class Example { public static void main(String[] args) { // get two double numbers in degrees double x = ... Read More
The zip_close() function is used to close the zip file archive. The zip is opened by the zip_open() function.Syntaxzip_close(zip_file)Parameterszip_file − A zip file opened with zip_open() is to be mentioned here. This is the file we want to close.ReturnThe zip_close() function returns nothing.ExampleOutputFile will be closed now
The zip_entry_close() function is used to close a zip archive opened by the zip_entry_open() function.Syntaxzip_entry_close(zip_entry)Parameterszip_entry − The zip entry resource. Required.ReturnThe zip_entry_close() function Returns TRUE on success and FALSE on failure.The following is an example. Let’s say we have "new.zip" file as our archive.Example
The zip_entry_compressed_size() function returns the compressed file size of a zip archive entry.Syntaxzip_entry_compressed_size(zip_entry)Parameterszip_entry − The zip entry resource. Required.ReturnThe zip_entry_compressed_size() function returns the compressed file size of a zip archive entry.The following is an example that gets the size of the files in "new.zip" archive.ExampleOutputCompressed: 90 Compressed: 12 Compressed: 67
The is_nan() function checks for ‘not a number’ value. It Returns TRUE if num is 'not a number', else FALSE is Returned.Syntaxis_nan(num)Parametersnum − The value to checkReturnThe is_nan() function Returns TRUE if num is 'not a number', else FALSE is Returned.ExampleLet us see another example −Example