Tutorial by Examples: n

import pandas as pd generate random DF df = pd.DataFrame(np.random.randint(0,10,size=(10, 3)), columns=list('ABC')) In [16]: print(df) A B C 0 4 1 4 1 0 2 0 2 7 8 8 3 2 1 9 4 7 3 8 5 4 0 7 6 1 5 5 7 6 7 8 8 6 7 3 9 6 4 5 select rows where value...
Example A var i,a,b,len; a = {x:0,y:0} function test(){ // return object created each call return {x:0,y:0}; } function test1(a){ // return object supplied a.x=0; a.y=0; return a; } for(i = 0; i < 100; i ++){ // Loop A b = test(); } for(i = 0; i < 100; ...
Without a try catch block, undefined functions will throw errors and stop execution: undefinedFunction("This will not get executed"); console.log("I will never run because of the uncaught error!"); Will throw an error and not run the second line: // Uncaught ReferenceError:...
Think of the mediator pattern as the flight control tower that controls planes in the air: it directs this plane to land now, the second to wait, and the third to take off, etc. However no plane is ever allowed to talk to its peers. This is how mediator works, it works as a communication hub among ...
It is also possible to pass your custom object to other activities using the Bundle class. There are two ways: Serializable interface—for Java and Android Parcelable interface—memory efficient, only for Android (recommended) Parcelable Parcelable processing is much faster than serializable....
.Rprofile is a file containing R code that is executed when you launch R from the directory containing the .Rprofile file. The similarly named Rprofile.site, located in R's home directory, is executed by default every time you load R from any directory. Rprofile.site and to a greater extend .Rprofil...
Yii2 provides efficient ways to retrieve data from the database.Consider an example of a simple employee table having fields emp_id, emp_name and emp_salary. In order to retrieve the employee names and their salaries, we use the query. select emp_name,emp_salary from employee To generate the abo...
Multiple conditions can be written using where() method as given below. // Creates a new \yii\db\Query() object $query = new \yii\db\Query(); $rows = $query->select(['emp_name','emp_salary']) ->from('employee') ->where(['emp_name' => 'Kiran', 'emp_salary' => 2500...
This example intend to be a gentle introduction to the Excel Object Model for beginners. Open the Visual Basic Editor (VBE) Click View --> Immediate Window to open the Immediate Window (or ctrl + G): You should see the following Immediate Window at the bottom on VBE: This wi...
Suppose we have a JSON string: ["first","second","third"] We can parse this JSON string into a String array : Gson gson = new Gson(); String jsonArray = "[\"first\",\"second\",\"third\"]"; String[] strings = gson.fromJson(j...
--- person_table: - &person001 fname: homer lname: simpson role: dad age: 33 - &person002 fname: marge lname: simpson role: mom age: 34 - &person003 fname: pe...
--- person_table: - &person001 fname: homer lname: simpson role: dad age: 33 - &person002 fname: marge lname: simpson role: mom age: 34 - &person003 fname: pe...
--- person_table: - &person001 fname: homer lname: simpson role: dad age: 33 - &person002 fname: marge lname: simpson role: mom age: 34 - &person003 fname: pe...
@Provider public class IllegalArgumentExceptionMapper implements ExceptionMapper<IllegalArgumentException> { @Override public Response toResponse(IllegalArgumentException exception) { return Response.serverError().entity("Invalid input: " + exception.getMessage(...
add: add the specified files on the next commit addremove: add all new files, delete all missing files backout: reverse effect of earlier changeset commit, ci: commit the specified files or all outstanding changes copy, cp: mark files as copied for the next commit forge...
annotate, blame: show changeset information by line for each file bisect: subdivision search of changesets cat: output the current or given revision of files diff: diff repository (or selected files) grep: search for a pattern in specified files and revisions log, history: show revision histo...
archive: create an unversioned archive of a repository revision bundle: create a changegroup file clone: make a copy of an existing repository export: dump the header and diffs for one or more changesets graft: copy changes from other branches onto the current branch incoming: show new change...
bookmarks, bookmark: create a new bookmark or list existing bookmarks branch: set or show the current branch name branches: list repository named branches config, showconfig, debugconfig: show combined config settings from all hgrc files files: list tracked files help: show help for a given t...
bookmarks, bookmark: create a new bookmark or list existing bookmarks branch: set or show the current branch name tag: add one or more tags for the current or given revision update, up, checkout, co: update working directory (or switch revisions)
FNR contains the number of the input file row being processed. In this example you will see awk starting on 1 again when starting to process the second file. Example with one file $ cat file1 AAAA BBBB CCCC $ awk '{ print FNR }' file1 1 2 3 Example with two files $ cat file1 AAAA BBBB...

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