Tutorial by Examples: d

I hope this example will help everyone to understand how awk internal variables like NR, FNR etc change when awk is processing two files. awk '{print "NR:",NR,"FNR:",FNR,"fname:",FILENAME,"Field1:",$1}' file1 file2 NR: 1 FNR: 1 fname: file1 Field1: f1d1 NR:...

Block will capture variables that appeared in the same lexical scope. Normally these variables are captured as "const" value: int val = 10; void (^blk)(void) = ^{ val = 20; // Error! val is a constant value and cannot be modified! }; In order to modify the variable, you need to ...

In the case of a discriminated record type, some of the components are known as discriminants and the remaining components can depend upon these. The discriminants can be thought of as parameterizing the type and the syntax reveals this analogy. In this example we create a type that provide a sq...

Following is the example of QLabel that displays use of texts,images and hyperlinks. import sys from PyQt4.QtCore import * from PyQt4.QtGui import * def window(): app = QApplication(sys.argv) win = QWidget() l1 = QLabel() l2 = QLabel() l3 = QLabel() l4 = QLabel()...

import sys from PyQt4 import QtGui def window(): app = QtGui.QApplication(sys.argv) w = QtGui.QWidget() b = QtGui.QLabel(w) b.setText("<h1>Welcome to PyQt4 SO Documentation!</h1>") w.setGeometry(100,100,550,65) b.move(50,20) w.setWindowTitle(&quo...

from bs4 import BeautifulSoup import requests main_url = "https://fr.wikipedia.org/wiki/Hello_world" req = requests.get(main_url) soup = BeautifulSoup(req.text, "html.parser") # Finding the main title tag. title = soup.find("h1", class_ = "firstHeading&qu...

import time def timer(func): def inner(*args, **kwargs): t1 = time.time() f = func(*args, **kwargs) t2 = time.time() print 'Runtime took {0} seconds'.format(t2-t1) return f return inner @timer def example_function(): #do stuff exa...

Vertical Index Match =INDEX(A1:A3,MATCH(E2,C1:C3,0))

Horizontal Index Match =INDEX(A1:C1,MATCH(E2,A3:C3,0))

Hiding Softkeyboard is a basic requirement usually when working with EditText. The softkeyboard by default can only be closed by pressing back button and so most developers use InputMethodManager to force Android to hide the virtual keyboard calling hideSoftInputFromWindow and passing in the token o...

public class CustomSurfaceView extends SurfaceView { @Override public boolean onTouchEvent(MotionEvent e) { super.onTouchEvent(e); if(e.getPointerCount() > 2){ return false; // If we want to limit the amount of pointers, we return false //...

As we said before, we go with the open-source version. For Windows you can choose strawberry or DWIM. Here we cover the strawberry version, since DWIM is based on it. The easy way here is installing from the official executable. See also berrybrew - the perlbrew for Windows Strawberry Perl

NLTK provides the FreqDist class that let's us easily calculate a frequency distribution given a list as input. Here we are using a list of part of speech tags (POS tags) to see which lexical categories are used the most in the brown corpus. import nltk brown_tagged = nltk.corpus.brown.tagged_w...

Value types (structures and enumerations) are passed by value to functions: a copy will be given to the function, not a reference to the variable. So the following function won't do anything. void add_three (int x) { x += 3; } int a = 39; add_three (a); assert (a == 39); // a is still 39...

A key part of the Reader monad is the ask (https://hackage.haskell.org/package/mtl-2.2.1/docs/Control-Monad-Reader.html#v:ask) function, which is defined for illustrative purposes: import Control.Monad.Trans.Reader hiding (ask) import Control.Monad.Trans ask :: Monad m => ReaderT r m r ask ...

This is an official MATLAB example Consider the following code: month = [1;1;2;3;8;1;3;4;9;11;9;12;3;4;11]; temperature = [57;61;60;62;45;59;64;66;40;56;38;65;61;64;55]; maxTemp = accumarray(month,temperature,[],@max); The image below demonstrates the computation process done by accumarray in...

A discriminant of a record type may influence the structure of objects. A choice of components may exists in an object according as a discriminant had had a particular value when the object was created. To support this variation, a record type's definition includes a distinction by cases that depend...

Let's see all the basic component for create a simple Hallo World. Define which implementation of JPA 2.1 we will use Build the connection to database creating the persistence-unit Implements the entities Implements DAO (Data access object) for manipulate the entities Test the application ...

It's similar to Vue.js version 1, version 2 can be directly embedded in a single html file. To include Vue.js2 in html file, make sure you have the script file included in the HTML. For example, use the following HTML. It should display the Hello message correctly. <div id="app">{...

This example shows how to define sub-commands for a given command, and how to easily associate a command handler. This example defines a thing command with get and set subcommands. package things; import io.dropwizard.cli.Command; import io.dropwizard.setup.Bootstrap; import net.sourceforge.a...