Tutorial by Examples: di

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()...

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...

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...

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...

To flatten multidimensional array into single dimension, flatMap advance functions is used. Other use case is to neglect nil value from array & mapping values. Let's check with example:- Suppose We have an multidimensional array of cities & we want to sorted city name list in ascending orde...

Using Oracle SQL’s NVL2() function, you can create a display column which contains one value if a field contains data and another value if a field does not contain data. For example, in an Entity search, turn the presence of a primary e-mail address into a text display column: NVL2( {email} , 'YES...

Building image is not something specific to php, but in order to build the image that we described above, we can simply use docker build -t <Image name> . Once the image is built, you can verify the same using docker images Which would list out all the images installed in your system. ...

<http:listener-config name="HTTP_Listener_Configuration" host="localhost" port="${http.port}" doc:name="HTTP Listener Configuration"/> <db:mysql-config name="MySQL_Configuration" host="${db.host}" port="${db.port}"...

With turbolinks, the traditional approach to using: $(document).ready(function() { // awesome code }); won't work. While using turbolinks, the $(document).ready() event will only fire once: on the initial page load. From that point on, whenever a user clicks a link on your website, turbolink...

It is very easy to disable turbolinks on specific links. According to the official turbolinks documentation: Turbolinks can be disabled on a per-link basis by annotating a link or any of its ancestors with data-turbolinks="false". Examples: // disables turbolinks for this one link ...

Application visits are initiated by clicking a Turbolinks-enabled link, or programmatically by calling Turbolinks.visit(location) By default, the visit function uses the 'advance' action. More understandably, the default behavior for the visit function is to advance to the page indicated by the ...

To allow multiple user registration on Ejabberd server, we need to configure file ejabberd.yml in Ejabberd latest versions. Configure ejabberd.yml like: in access_rules: add register: - allow register_from: - allow registration_timeout: - infinity mod_register: acc...

Let's say you have already created the custom Test Work Orders screen to manage test work orders in your Acumatica ERP application: There is already NoteID field declared in the TestWorkOrder DAC, managed on the Test Work Orders screen: [Serializable] public class TestWorkOrder : IBqlTable { ...

Usually output of a command goes to the terminal. Using the concept of Output redirection, the output of a command can be redirected to a file. So insted of displaying the output to the terminal it can be send to a file. '>' character is used for output redirection. $ pwd > file1 $ cat file...

The commands normally take their input from the standard input device keyboard. Using Input redirection concept, we can have their input redirected from a file. To redirect standard input from a file instead of the keyboard, the '<' character is used. $ cat file1 monday tuesday wednsday th...

If a file may contain Windows or Unix-like line endings (or even a mixture of both) then the intended text replacement may not work as expected. Sample: $ echo -e 'Entry 1\nEntry 2.1\tEntry 2.2\r\nEntry 3\r\n\r\n' \ > | awk -F'\t' '$1 != "" { print $1 }' \ > | hexdump -c 0000000...

Copying files copy copies the source file in the first argument to the destination in the second argument. The resolved destination needs to be in a directory that is already created. if (copy('test.txt', 'dest.txt')) { echo 'File has been copied successfully'; } else { echo 'Failed to ...