Tutorial by Examples: u

5. Populating array with specific text from string via start and end characters.

'Note: I use this method to extract non-html data in extracted GET telnet results 'This example effectively grabs every other vehicle that have start and finish 'characters, which in this case is "/". 'Resulting in an array like this: 'extractedData(0) = "/Jeep" 'extractedD...

4. Chaining string manipulation methods together.

Dim exStr : exStr = " <Head>data</Head> " Dim res res = Ucase(Replace(Mid(exStr, instr(exStr, ">")+1,4), "ata", "ark")) 'res now equals DARK 'instr(exStr, ">") returns 7 'Mid(" <Head>data</Head> ", 7+1,...

3. Arrays - Multi-Dimensional

Dim mdArray(2,3) mdArray(0, 0) = "test1" mdArray(0, 1) = "test2" mdArray(0, 2) = "test3" mdArray(0, 3) = "test4" mdArray(1, 0) = "test5" mdArray(1, 1) = "test6" mdArray(1, 2) = "test7" mdArray(1, 3) = "test8" md...

4. Arrays - Multi-Dimensional - Dynamic

Dim mddArray() ReDim mddArray(0) Dim ti, testinc: testinc = "test": ti = 1 For i = 0 To 4 Dim tmpArray(): ReDim tmpArray(0) For j = 0 To 3 tmpArray(UBound(tmpArray)) = testinc & ti ti = ti + 1 ReDim Preserve tmpArray(UBound(tmpArray) + 1) Ne...

Configure Macros in a Project

In the build.sbt file (or where the project is defined if it is in another location), add the following setting: scalacOptions += "-language:experimental.macros" For instance, a project might be defined like this: lazy val main = project.in(file(".")) // root project .se...

Using the PROMPT_COMMAND envrionment variable

When the last command in an interactive bash instance is done, the evaluated PS1 variable is displayes. Before actually displaying PS1 bash looks whether the PROMPT_COMMAND is set. This value of this var must be a callable program or script. If this var is set this program/script is called BEFORE th...

Using PS2

PS2 is displayed when a command extends to more than one line and bash awaits more keystrokes. It is displayed too when a compound command like while...do..done and alike is entered. export PS2="would you please complete this command?\n" # now enter a command extending to at least two l...

Using PS3

When the select statement is executed, it displays the given items prefixed with a number and then displays the PS3 prompt: export PS3=" To choose your language type the preceding number : " select lang in EN CA FR DE; do # check input here until valid. break done

Using PS4

PS4 is displayes when bash is in debugging mode. #!/usr/bin/env bash # switch on debugging set -x # define a stupid_func stupid_func(){ echo I am line 1 of stupid_func echo I am line 2 of stupid_func } # setting the PS4 "DEBUG" prompt export PS4='\nDEBUG level:$SHLVL ...

Advanced features of Exceptions

This example covers some advanced features and use-cases for Exceptions. Examining the callstack programmatically Java SE 1.4 The primary use of exception stacktraces is to provide information about an application error and its context so that the programmer can diagnose and fix the problem. Som...

Using BigDecimal instead of float

Due to way that the float type is represented in computer memory, results of operations using this type can be inaccurate - some values are stored as approximations. Good examples of this are monetary calculations. If high precision is necessary, other types should be used. e.g. Java 7 provides Big...

MVVM Example using DataBinding Library

The whole point of MVVM is to separate layers containing logic from the view layer. On Android we can use the DataBinding Library to help us with this and make most of our logic Unit-testable without worrying about Android dependencies. In this example I'll show the central components for a stupid...

typealias for closures with parameters

typealias SuccessHandler = (NSURLSessionDataTask, AnyObject?) -> Void This code block creates a type alias named SuccessHandler, just in the same way var string = "" creates a variable with the name string. Now whenever you use SuccessHandler, for example: func example(_ handler: S...

typealias for empty closures

typealias Handler = () -> Void typealias Handler = () -> () This block creates a type alias that works as a Void to Void function (takes in no parameters and returns nothing). Here is a usage example: var func: Handler? func = {}

Listing currently running queries

The following command lists out the queries that are currently being run on the server db.currentOp() The output looks something similar to this { "inprog" : [ { "opid" : "302616759", "active" : true, &...

Shifting or lagging values in a dataframe

import pandas as pd df = pd.DataFrame({'eggs': [1,2,4,8,], 'chickens': [0,1,2,4,]}) df # chickens eggs # 0 0 1 # 1 1 2 # 2 2 4 # 3 4 8 df.shift() # chickens eggs # 0 NaN NaN # 1 0.0 1.0 # 2 1.0 2.0 ...

Replication plugin

It is used to duplicate a git repository from gerrit to anyway. Configuration file is $GERRIT_INSTALL/etc/replication.config. Config file example to clone MyRepo from gerrit to backupServer [remote "backup"] url = ProjectUrlOnBackupServer/${name} #Example backup.some.org:/pub/git/${...

Events-log plugin

This plugin is mandatory to make Gerrit able to receive message from other services. As an example, it has to be install to use Sonar Gerrit plugin Install jar file under plugins folder Default configuration is sufficient

Using PermissionUtil

PermissionUtil is a simple and convenient way of asking for permissions in context. You can easily provide what should happen in case of all requested permissions granted (onAllGranted()), any request was denied (onAnyDenied()) or in case that a rational is needed (onRational()). Anywhere in your A...

Routing and HTTP methods

By default, routes only respond to GET requests. You can change this behavior by supplying the methods argument to the route() decorator. from flask import request @app.route('/login', methods=['GET', 'POST']) def login(): if request.method == 'POST': do_the_login() else: ...

Page 517 of 701

logo rip
SUPPORT & PARTNERS
STAY CONNECTED

Get monthly updates about new articles, cheatsheets, and tricks.