Tutorial by Examples: n

Use try-finally to avoid leaking resources (such as memory) in case an exception occurs during execution. The procedure below saves a string in a file and prevents the TStringList from leaking. procedure SaveStringToFile(const aFilename: TFilename; const aString: string); var SL: TStringList; ...

Detailed instructions on getting iPhone set up or installed. Turn on your iPhone. You will see the "Hello" screen in many languages. Slide to right to continue. Choose the language you want and tap your country or region. Choose a Wi-Fi network and make sure your iPhone 7 is connected...

Const baseString As String = "Foo Bar" Dim containsBar As Boolean 'Check if baseString contains "bar" (case insensitive) containsBar = InStr(1, baseString, "bar", vbTextCompare) > 0 'containsBar = True 'Check if baseString contains bar (case insensitive) co...

Const baseString As String = "Foo Bar" Dim containsBar As Boolean Dim posB As Long posB = InStr(1, baseString, "B", vbBinaryCompare) 'posB = 5

Const baseString As String = "Foo Bar" Dim containsBar As Boolean 'Find the position of the last "B" Dim posX As Long 'Note the different number and order of the paramters for InStrRev posX = InStrRev(baseString, "X", -1, vbBinaryCompare) 'posX = 0

An array is just a block of sequential memory locations for a specific type of variable. Arrays are allocated the same way as normal variables, but with square brackets appended to its name [] that contain the number of elements that fit into the array memory. The following example of an array uses...

Const baseString As String = "Foo Bar" Dim leftText As String leftText = Left$(baseString, 3) 'leftText = "Foo"

Const baseString As String = "Foo Bar" Dim rightText As String rightText = Right$(baseString, 3) 'rightText = "Bar"

Const baseString As String = "Foo Bar" 'Get the string starting at character 2 and ending at character 6 Dim midText As String midText = Mid$(baseString, 2, 5) 'midText = "oo Ba"

'Trim the leading and trailing spaces in a string Const paddedText As String = " Foo Bar " Dim trimmedText As String trimmedText = Trim$(paddedText) 'trimmedText = "Foo Bar"

Typical usage of ExtJS leverages the framework to build single-page rich-applications (RIA). The simplest way to get started is to make use of Sencha Cmd, a CLI build tool covering most of the general concerns in a deployment life-cycle, primarily: package and dependency management code compil...

Command line arguments passed to awk are stored in the internal array ARGV of ARGC elements. The first element of the array is the program name. For example: awk 'BEGIN { for (i = 0; i < ARGC; ++i) { printf "ARGV[%d]=\"%s\"\n", i, ARGV[i] } }' arg1 arg2 arg3 ...

Authenticate user with Plus login onCreate GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN) .requestIdToken(getString(R.string.default_web_client_id)) .requestScopes(new Scope(Scopes.PLUS_LOGIN)) .requestEmail() .build(); mGoogleApiClient...

Client.java import java.io.*; import java.net.*; public class Client{ public static void main(String [] args) throws IOException{ DatagramSocket clientSocket = new DatagramSocket(); InetAddress address = InetAddress.getByName(args[0]); String ex = "He...

Starting out: HTML <table id='my-table' width='960' height='500'></table> JS var data = [ { type: "Name", content: "John Doe" }, { type: "Birthdate", content: "01/01/1970" }, { type: "Salary", content: "$40,000,0...

The most flexible base R function for reshaping data is reshape. See ?reshape for its syntax. # create unbalanced longitudinal (panel) data set set.seed(1234) df <- data.frame(identifier=rep(1:5, each=3), location=rep(c("up", "down", "left", &quo...

Build.VERSION_CODES is an enumeration of the currently known SDK version codes. In order to conditionally run code based on the device's Android version, use the TargetApi annotation to avoid Lint errors, and check the build version before running the code specific to the API level. Here is an exa...

public final class DrawerLayoutTest { @Test public void Open_Close_Drawer_Layout() { onView(withId(R.id.drawer_layout)).perform(actionOpenDrawer()); onView(withId(R.id.drawer_layout)).perform(actionCloseDrawer()); } public static ViewAction actionOpenDrawer() { return ne...

var directories = [ {name: 'users' , parent : null }, {name: 'distalx' , parent : 'users' }, {name: 'guest' , parent : 'users' }, {name: 'shared' , parent : 'users' }, {name: 'documents' , parent : 'distalx' }, {name: 'music' , parent : 'distalx' }, {name: 'desktop' , parent : '...

Aside from destructuring objects into function arguments, you can use them inside variable declarations as follows: const person = { name: 'John Doe', age: 45, location: 'Paris, France', }; let { name, age, location } = person; console.log('I am ' + name + ', aged ' + age + ' and li...