Tutorial by Examples: f

PHP 5.5 introduces Generators and the yield keyword, which allows us to write asynchronous code that looks more like synchronous code. The yield expression is responsible for giving control back to the calling code and providing a point of resumption at that place. One can send a value along the yi...

Unzipping a zip archive is done with unzip function from the utils package (which is included in base R). unzip(zipfile = "bar.zip", exdir = "./foo") This will extract all files in "bar.zip" to the "foo" directory, which will be created if necessary. Tilde...

Listing files in a zip archive is done with unzip function from the utils package (which is included in base R). unzip(zipfile = "bar.zip", list = TRUE) This will list all files in "bar.zip" and extract none. Tilde expansion is done automatically from your working directory. ...

Listing files in a tar archive is done with untar function from the utils package (which is included in base R). untar(zipfile = "bar.tar", list = TRUE) This will list all files in "bar.tar" and extract none. Tilde expansion is done automatically from your working directory. ...

Extracting files from a tar archive is done with untar function from the utils package (which is included in base R). untar(tarfile = "bar.tar", exdir = "./foo") This will extract all files in "bar.tar" to the "foo" directory, which will be created if nece...

Vlookup finds some value in the leftmost column of a range and returns a value some number of columns to the right and in the same row. Let's say you want to find the surname of Employee ID 2 from this table: =VLOOKUP(2,$A$2:$C$4,3,0) The value you're retrieving data for is 2 The table you...

It's good practice to complete your AssemblyInfo's default fields. The information may be picked up by installers and will then appear when using Programs and Features (Windows 10) to uninstall or change a program. The minimum should be: AssemblyTitle - usually the namespace, i.e. MyCompany.MySo...

A higher-order function is one that takes another function as an argument or returns a function (or both). This is commonly done with lambdas, for example when passing a predicate to a LINQ Where clause: var results = data.Where(p => p.Items == 0); The Where() clause could receive many diffe...

function onOpen() { // Add a custom menu to run the script var ss = SpreadsheetApp.getActiveSpreadsheet(); var searchMenuEntries = [ {name: "Run", functionName: "search"}]; ss.addMenu("Get Files", searchMenuEntries); } function getFiles() { // Get...

Then go into the mongo shell and initiate the replica set, like so: meteor mongo > rs.initiate() PRIMARY> rs.add("mongo-a") PRIMARY> rs.add("mongo-b") PRIMARY> rs.add("mongo-c") PRIMARY> rs.setReadPref('secondaryPreferred')

PMF FOR THE BINOMIAL DISTRIBUTION Suppose that a fair die is rolled 10 times. What is the probability of throwing exactly two sixes? You can answer the question using the dbinom function: > dbinom(2, 10, 1/6) [1] 0.29071 PMF FOR THE POISSON DISTRIBUTION The number of sandwhich ordered in ...

General Using the package RMySQL we can easily query MySQL as well as MariaDB databases and store the result in an R dataframe: library(RMySQL) mydb <- dbConnect(MySQL(), user='user', password='password', dbname='dbname',host='127.0.0.1') queryString <- "SELECT * FROM table1 t1 JO...

The SilverStripe Grid Field Extensions Module has some very nice features to enhance the basic GridField... GridFieldAddExistingSearchButton - a more advanced search form for adding items GridFieldAddNewInlineButton - builds on GridFieldEditableColumns to allow inline creation of records. GridF...

The module Better Buttons for GridField adds new form actions and buttons to the GridField detail form. Save and add another: Create a record, and go right to adding another one, without having to click the back button, and then add again Save and close: Save the record and go back to list view ...

The module UserForms enables CMS users to create dynamic forms via a drag and drop interface and without getting involved in any PHP code. Main Features Construct a form using all major form fields (text, email, dropdown, radio, checkbox..) Ability to extend userforms from other modules to prov...

Intuition The categorical product of two types A and B should contain the minimal information necessary to contain inside an instance of type A or type B. We can see now that the intuitive coproduct of two types should be Either a b. Other candidates, such as Either a (b,Bool), would contain a part...

(This example copied from this StackOverflow answer) Let's say you have a number of different data types that all ought to have a lens with the same name, in this case capacity. The makeFields slice will create a class that accomplish this without namespace conflicts. {-# LANGUAGE FunctionalDepen...

First thing to do is enable the mod rewrite on wamp go to Apache modules and scroll down the list If not showing tick enable it and then restart all servers. Linux users can also use below terminal command to enable rewrite module sudo a2enmod rewrite Then restart apache using: sudo service...

Paste your fonts file inside android/app/src/main/assets/fonts/font_name.ttf Recompile the Android app by running react-native run-android Now, You can use fontFamily: 'font_name' in your React Native Styles

The GHC compiler has mature support for compiling with profiling annotations. Using the -prof and -fprof-auto flags when compiling will add support to your binary for profiling flags for use at runtime. Suppose we have this program: main = print (fib 30) fib n = if n < 2 then 1 else fib (n-1)...