Tutorial by Examples: re

Go to the repository you want to clone (something like: https://github.com/username/repo) On the right, click on the green button named clone or download A small window will appear, copy the url (something like: https://github.com/username/repo.git) Open a terminal window on...

If you have email column you can mask it with email() mask: ALTER TABLE Company ALTER COLUMN Email ADD MASKED WITH (FUNCTION = 'email()') When user tries to select emails from Company table, he will get something like the following values: [email protected] [email protected] [email protected]

Func<int, int> add1 = i => i + 1; Func<int, int, int> add = (i, j) => i + j; // Behaviourally equivalent to: int Add1(int i) { return i + 1; } int Add(int i, int j) { return i + j; } ... Console.WriteLine(add1(42)); //43 Console.WriteLine(Add1(42));...

// assume source is {0, 1, 2, ..., 10} var evens = source.Where(n => n%2 == 0); // evens = {0, 2, 4, ... 10} var strings = source.Select(n => n.ToString()); // strings = {"0", "1", ..., "10"}

See remarks for discussion of closures. Suppose we have an interface: public interface IMachine<TState, TInput> { TState State { get; } public void Input(TInput input); } and then the following is executed: IMachine<int, int> machine = ...; Func<int, int> machineC...

A decision tree is a classifier which uses a sequence of verbose rules (like a>7) which can be easily understood. The example below trains a decision tree classifier using three feature vectors of length 3, and then predicts the result for a so far unknown fourth feature vector, the so called te...

Go to the directory with the source code: cd freebsdsrc Go to the directory with the kernel's configuration code: # If your system is 32-bit. cd sys/i386/conf/ # If your system is 64-bit. cd sys/amd64/conf/ Get a copy of the GENERIC kernel (let's call it MODEDKERNEL). It will ...

Let's configure the destination directory for the root filesystem of your new FreeBSD (for example /usr/home/beastie/MODEDKERNEL). Add the following lines to /etc/src.conf to set it up: .if ${KERNCONF} == "MODEDKERNEL" DESTDIR?=/usr/home/beastie/MODEDKERNEL MODULES_OVERRID...

The preserveAspectRatio attribute has an optional parameter: meet | slice. The default behavior is meet which stretches the content in both the x and y dimension until it fills either the width or height of the viewBox. The alternative - slice preserves the aspect ratio of the content but scales up ...

identification division. program-id. deleting. environment division. configuration section. input-output section. file-control. select optional indexed-file assign to "indexed-file.dat" status is indexing-status organization is ind...

Spring is a vast framework, so the Spring framework has been divided in several modules which makes spring lightweight. Some important modules are: Spring Core Spring AOP Spring JDBC Spring Transaction Spring ORM Spring MVC All the modules of Spring are independent of each other except S...

Keychain.h #import <Foundation/Foundation.h> typedef void (^KeychainOperationBlock)(BOOL successfulOperation, NSData *data, OSStatus status); @interface Keychain : NSObject -(id) initWithService:(NSString *) service_ withGroup:(NSString*)group_; -(void)insertKey:(NSString *)key with...

You can push tasks or data to the firebase realtime database and run a worker which listens to the firebase queue to run some background processess Setup firebase Create a Firebase project in the Firebase console, if you don't already have one. If you already have an existing Google project a...

Expression<Func<int, bool>> checkEvenExpression = i => i%2 == 0; // lambda expression is automatically converted to an Expression<Func<int, bool>>

Portsnap portsnap fetch portsnap extract updating ports tree with portsnap portsnap update schedule cron job for daily updates 0 3 * * * root /usr/sbin/portsnap cron SVN head cd /usr/ports svnlite checkout https://svnweb.freebsd.org/ports/head . quaterly FreeBSD Ports team freeze...

keyword search cd /usr/ports make search key=apache name search cd /usr/ports make search name=apache24 Using fresports Official FreeBSD ports website (http://freshports.org/) give you a nice way to find ports and all information concerning it.

If you have found your software in the ports tree, now its the time to build it. Simple build and install with manual configuration cd /usr/ports/www/apache24 make make install Simple build and install with automatic configuration cd /usr/ports/www/apache24 make BATCH=yes make install ...

If you want custom configuration from ports, you can configure it before building it make config. All ports configuration are stored in /var/db/ports/${CATEGORY_NAME}/options as makefile. Configuring www/apache24 cd /usr/ports/www/apache24 make config make make install This configuration wil...

Regular expression matching is a powerful tool (in Java, and in other contexts) but it does have some drawbacks. One of these that regular expressions tends to be rather expensive. Pattern and Matcher instances should be reused Consider the following example: /** * Test if all strings in a lis...

The for comprehension is a compact way to run a block of code that depends on the successful result of multiple futures. With f1, f2, f3 three Future[String]'s that will contain the strings one, two, three respectively, val fCombined = for { s1 <- f1 s2 <- f2 ...