1596650160
Demystifying np.where and np.select
In this article we will understand np.where, np.select with some examples.
numpy.where
numpy.where(condition[, x, y])
This function returns x if the condition is true else it returns y
Example 1: Given a one-dimensional array from (0,9) if elements are less than 5 the element should be the same else multiply the element by 10.
import numpy as np
a = np.arange(10)
np.where(a < 5,a,10*a)
Out[1]: array([ 0, 1, 2, 3, 4, 50, 60, 70, 80, 90])
**Example 2: **Given two 2-D arrays obtain an array with respect to condition.
np.where([[True,False],[True,False]],[[1,2],[3,4]],[[45,52],[78,96]])
Out[3]:
array([[ 1, 52],
[ 3, 96]])
If the condition is true we take element from x else from y.
**Example 3: **given a 2-d matrix if the value in the ix if less than 4, The value should be the same else return the value as -1.
np.where(a < 4,a,-1)
Out[8]:
array([[ 0, 1, 2],
[ 0, 2, -1],
[ 0, 3, -1]])
#machine-learning #artificial-intelligence #python #numpy #matrix
What is GEEK
Buddha Community
1601983140
SQL SELECT INTO Example | SELECT INTO In SQL
SQL SELECT INTO is used to create a table from an existing table by copying the contents of the current table to the new table. The critical point to note here is that the column and data type of column must be the same. SELECT INTO copies data from one table into a new table. SELECT INTO creates a new table located in the default filegroup.
See the following syntax.
Select column(s)
INTO new_table
from old_table_name where(condition).
#PARAMETERS
- Column(s): Name of the columns which we want to copy.
- INTO: This is a keyword that is used to perform the copy operation.
- New_table: Name of the new table which will be created.
- Old_table_name: Name of the old table from where we are copying.
- Where(condition): This is used for imposing conditions into the select statement.
#sql #sql select into #select into
1578417846
Collection of 14 Vue Select Component for Vue.js App
Vue select component can handle multiple selections. It’s enabled with the multiple property. Like with the single selection, you can pull out the new value by accessing event. target. value in the onChange callback.
1. Vue GridMultiselect
Simple multi-select component with items displayed in a table like UI.
2. vue-select
Everything you wish the HTML <select> element could do, wrapped up into a lightweight, extensible Vue component.
Vue Select is a feature rich select/dropdown/typeahead component.
Features
- Tagging
- Filtering / Searching
- Vuex Support
- AJAX Support
- SSR Support
- ~20kb Total / ~5kb CSS / ~15kb JS
- Select Single/Multiple Options
- Customizable with slots and SCSS variables
- Tested with Bootstrap 3/4, Bulma, Foundation
- +95% Test Coverage
- Zero dependencies
3. @desislavsd/vue-select
Lightweight and mighty select component like Chosen and Select 2 done the Vue way.
Features
- Uses v-model
- Single / Multiple selection
- Tagging + custom key triggers
- List Filtering / Searching
- Support for async list source
- Out of the box AJAX support using fetch
- Debounce AJAX requests
- Transparent access to input attributes
- Highly customizable
- Zero dependencies
4. v-super-select
An accessible and customizable select/drop down component that features searching, grouping, and virtual scrolling.
5. vue-dynamic-select
A VueJS plugin that provides a searchable and reactive select list component with no dependencies.
6. @alfsnd/vue-bootstrap-select
A vue version of bootstrap select
7. vue-selectize
Vanila Vue.js component that mimics Selectize behaviour (no need jquery dependency)
8. vue2-selectize
A Selectize wrapper for VueJS 2.
9. v-suggest
A Vue2 plugin for input content suggestions, support keyboard to quick pick.
10. vue-multi-select
This component gives you a multi/single select with the power of Vuejs components.
11. v-cascade
A lovely component of cascade selector with vue.js (Support both of PC and Mobile)
12. stf vue select VUE2
stf vue select - most flexible and customized select
For detailed explanation on how things work, checkout the DEMO
13. Advanced Vue.js Chained Select
Using Vue.js to chain mulitiple select inputs together.
14. Vue Select2
A native Vue.js component that provides similar functionality to Select2 without the overhead of jQuery.
Rather than bringing in jQuery just to use Select2 or Chosen, this Vue.js component provides similar functionality without the extra overhead of jQuery, while providing the same awesome data-binding features you expect from Vue. Vue-select has no JavaScript dependencies other than Vue, and is designed to mimic Select2.
Thank for read!
#vue-select #vue-select-component #vue-js #select-component
1595303760
Bash Select (Make Menus) and Bash select Example
In this tutorial, we will cover the basics of the select construct in Bash.
The select construct allows you to generate menus.
Bash select Construct
The select construct generates a menu from a list of items. It has almost the same syntax as the [for](https://linuxize.com/post/bash-for-loop/) loop:
select ITEM in [LIST]
do
[COMMANDS]
done
Copy
The [LIST] can be a series of strings separated by spaces, a range of numbers, output of a command, an array, and so on. A custom prompt for the select construct can be set using the PS3 environment variable.
When the select construct is invoked, each item from the list is printed on the screen (standard error), preceded with a number.
If the user enters a number that corresponds to the number of one of the displayed items, then the value of [ITEM] is set to that item. The value of the selected item is stored in the variable REPLY. Otherwise, if the user input is empty, the prompt and the menu list are displayed again.
Theselectloop will continue to run and prompt for user input until the[break](https://linuxize.com/post/bash-break-continue/)command is executed.To demonstrate how the select construct works, let’s take a look at the following simple example:
PS3="Enter a number: "
select character in Sheldon Leonard Penny Howard Raj
do
echo "Selected character: $character"
echo "Selected number: $REPLY"
done
#bash #bash select construct #bash select
1596650160
Demystifying np.where and np.select
In this article we will understand np.where, np.select with some examples.
numpy.where
numpy.where(condition[, x, y])
This function returns x if the condition is true else it returns y
Example 1: Given a one-dimensional array from (0,9) if elements are less than 5 the element should be the same else multiply the element by 10.
import numpy as np
a = np.arange(10)
np.where(a < 5,a,10*a)
Out[1]: array([ 0, 1, 2, 3, 4, 50, 60, 70, 80, 90])
**Example 2: **Given two 2-D arrays obtain an array with respect to condition.
np.where([[True,False],[True,False]],[[1,2],[3,4]],[[45,52],[78,96]])
Out[3]:
array([[ 1, 52],
[ 3, 96]])
If the condition is true we take element from x else from y.
**Example 3: **given a 2-d matrix if the value in the ix if less than 4, The value should be the same else return the value as -1.
np.where(a < 4,a,-1)
Out[8]:
array([[ 0, 1, 2],
[ 0, 2, -1],
[ 0, 3, -1]])
#machine-learning #artificial-intelligence #python #numpy #matrix
1623975000
Selection Sort in Java
Introduction
Sorting data is a frequent problem in computer science. Given a collection of elements, the goal is to rearrange them in some order. Common examples are sorting an array alphabetically or from smallest to largest.
Sorted data is a lot easier to manipulate. Finding the largest or smallest element of an array can be done in constant time if the array is sorted. Searching for an element is a lot faster using algorithms such as Binary Search which rely on the assumption that the array is already sorted.
One of the simplest algorithms for sorting data is Selection Sort. It’s usually taught in beginner programming classes and tutorials to explain the concept of sorting, so we’ll keep this article very beginner-friendly.
#java #selection sort in java #selection sort