for of loop with index and entries

JS

@davidmchale

If statement with switch delete duplicates from an array loop and find class Nullish with an Object - basic tranverse classes in a list substring capitalize substring text with elipses array.at() js media query Dynamic Filter - buttons advanced flow converted if statement Add an array to a HTML dataset getElement Function Intersection Observer template intersection Observer Basic Example fetch data, display and filter for of loop - get index get random index value from an array fetch with post method get id value from url debounce for scrolling get element or elements check functions return values from functions indexOf explantion sorting basic using for-of loop for getting index value of iteration import json data into a JS module Splide slider with modal JS change active class if url path matches Pagination / array of arrays FIlter array or return full array price formatting ignores wrapping element on click Create a dummy array with numbers Random Generated Number Dummy array - list items dummy id Limits the amount of text Random Number generator function format date function Remove duplicates from JSON array data Filter Posts from state remove duplicates and create object simple ternary remove transition with propertyName sorting in reverse counting items using reduce splice explanation Declaring Variables Get primitive properties on a number / string etc using proto check an array of objects exists / check using regex Destructuring nested function scope IFFE function basic switch Switch with function passing an object check length of object while loops (for when the number we are iterating over is unknown) Ternary with 2 conditions for of loop with index array nested ternary operator callbacks Method Borrowing this keyword and arrow functions rest operator - args functions p1 rest operator - args functions p2 for of loop with index and entries callback functions explained version 1 callback functions explained version 2 Form and value IF Element shorthand function as a callback inside a higher order function Using param for symbol remove 'px' from number scrolling behaviour test 1 clearing event listeners new URL applying css vars scroll behaviours testing intersection observer intersection observer with loop JS docs - writing js docs check is key exists call() nested ternary with function forEach with function and ...args using template literals filter duplicates get class by indexOf returning ternary operator remove children from parent bootstrap rows with cols fetching multple data endpoints Promise.all

#c# #loops #for

"*" pattern C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace StarPattern
{
class Program
{
static void Main(string[] args)
{
int x, y, z;
for (x =6; x >= 1; x--)
{
for (y = 1; y < x; y++)
{
Console.Write(" ");
}
for (z = 6; z >= x; z--)
{
Console.Write("*");
}
Console.WriteLine();
}
Console.ReadLine();
}
}
}

#numpy #booleans_in_numpy #list #forloop #for #loop

Loop over lists of lists

# house list of lists
house = [["hallway", 11.25], 
         ["kitchen", 18.0], 
         ["living room", 20.0], 
         ["bedroom", 10.75], 
         ["bathroom", 9.50]]
         
# Build a for loop from scratch
for x in house :
    #x[0] to access name of room
    #x[1] to access area in sqm
    print('the ' + x[0] + " is " + str(x[1]) + " sqm")

#list #forloop #for #loop ##dictionary

Loop over dictionary

# Definition of dictionary
europe = {'spain':'madrid', 'france':'paris', 'germany':'berlin',
          'norway':'oslo', 'italy':'rome', 'poland':'warsaw', 'austria':'vienna' }
          
# Iterate over europe
for key, value in europe.items() :
    print('the capital of ' + str(key) + ' is ' + str(value))

#list #forloop #for #loop ##dictionary

Loop over numpy array

# Import numpy as np

import numpy as np
#for x in my_array : #in 1D Numpy array
#for x in np.nditer(my_array) : #for 2D Numpy array

# For loop over np_height

for x in np_height:
    print(str(x) + " inches")

# For loop over np_baseball
for x in (np.nditer(np_baseball)):
    print(x)

#list #forloop #for #loop ##dictionary

Loop over Dataframe - Pandas

#Iterating over a Pandas DataFrame is typically done with the iterrows()
# Import cars data
import pandas as pd
cars = pd.read_csv('cars.csv', index_col = 0)

# Iterate over rows of cars
for lab,row in cars.iterrows():
    print(lab)
    print(row)

#list #forloop #for #loop ##dictionary

Loop over Dataframe - Pandas: Part 2

# Import cars data
import pandas as pd
cars = pd.read_csv('cars.csv', index_col = 0)

# Adapt for loop
for lab, row in cars.iterrows() :
    print(lab + ": " + str(row['cars_per_cap']))

#Something new

# Import cars data
import pandas as pd
cars = pd.read_csv('cars.csv', index_col = 0)

# Code for loop that adds COUNTRY column
for lab, row in cars.iterrows():
    cars.loc[lab,'COUNTRY'] = row['country'].upper()


# Print cars
print(cars)

#list #forloop #for #loop ##dictionary

adding columns to pandas dataframe

# Import cars data
import pandas as pd
cars = pd.read_csv('cars.csv', index_col = 0)

# Use .apply(str.upper)


cars['COUNTRY'] = cars['country'].apply(str.upper)
print(cars)

#list #forloop #for #loop ##dictionary

Random Numbers

# Import numpy as np
import numpy as np

# Set the seed
np.random.seed(123)

# Generate and print random float
print(np.random.rand())

#Roll The Dice
# Import numpy and set seed
import numpy as np
np.random.seed(123)

# Use randint() to simulate a dice
print(np.random.randint(1,7))
# Use randint() again
print(np.random.randint(1,7))

#list #forloop #for #loop ##dictionary

Dice Random no

# Numpy is imported, seed is set

# Starting step
step = 50
# Roll the dice
dice = np.random.randint(1,7)
# Finish the control construct
if dice <= 2 :
    step = step - 1
elif dice <= 5 :
    step = step + 1
else:
    step = step + np.random.randint(1,7)

# Print out dice and step
print(dice)
print(step)

#list #forloop #for #loop #dicegame

The next step

# Numpy is imported, seed is set

# Initialize random_walk
random_walk = [0]

# Complete the ___
for x in range(100) :
    # Set step: last element in random_walk
   
    step = random_walk[-1]

    # Roll the dice
    dice = np.random.randint(1,7)

    # Determine next step
    if dice <= 2:
        step = step - 1
    elif dice <= 5:
        step = step + 1
    else:
        step = step + np.random.randint(1,7)

    # append next_step to random_walk
    random_walk.append(step)

# Print random_walk
print(random_walk)

#Not Going below zero
# Numpy is imported, seed is set

# Initialize random_walk
random_walk = [0]

for x in range(100) :
    step = random_walk[-1]
    dice = np.random.randint(1,7)

    if dice <= 2:
        # Replace below: use max to make sure step can't go below 0
        step = max(0, step - 1)
    elif dice <= 5:
        step = step + 1
    else:
        step = step + np.random.randint(1,7)

    random_walk.append(step)

print(random_walk)

#list #forloop #for #loop #dicegame #matplotlib #[plot #graph

Plotting random dice walk

# Numpy is imported, seed is set

# Initialization
random_walk = [0]

for x in range(100) :
    step = random_walk[-1]
    dice = np.random.randint(1,7)

    if dice <= 2:
        step = max(0, step - 1)
    elif dice <= 5:
        step = step + 1
    else:
        step = step + np.random.randint(1,7)

    random_walk.append(step)

# Import matplotlib.pyplot as plt
import matplotlib.pyplot as plt

# Plot random_walk
plt.plot(random_walk)

# Show the plot
plt.show()

#list #forloop #for #loop #dicegame #matplotlib #[plot #graph

Simulate multiple walks: dice and distribution

# Numpy is imported; seed is set

# Initialize all_walks (don't change this line)
all_walks = []

# Simulate random walk 10 times
for i in range(10):

    # Code from before
    random_walk = [0]
    for x in range(100) :
        step = random_walk[-1]
        dice = np.random.randint(1,7)

        if dice <= 2:
            step = max(0, step - 1)
        elif dice <= 5:
            step = step + 1
        else:
            step = step + np.random.randint(1,7)
        random_walk.append(step)

    # Append random_walk to all_walks
    all_walks.append(random_walk)

# Print all_walks
print(all_walks)


#####################################################################
# numpy and matplotlib imported, seed set

# Simulate random walk 250 times
all_walks = []
for i in range(250) :
    random_walk = [0]
    for x in range(100) :
        step = random_walk[-1]
        dice = np.random.randint(1,7)
        if dice <= 2:
            step = max(0, step - 1)
        elif dice <= 5:
            step = step + 1
        else:
            step = step + np.random.randint(1,7)

        # Implement clumsiness
        if np.random.rand() <= 0.001 :
            step = 0

        random_walk.append(step)
    all_walks.append(random_walk)

# Create and plot np_aw_t
np_aw_t = np.transpose(np.array(all_walks))
plt.plot(np_aw_t)
plt.show()

#list #forloop #for #loop #dicegame #matplotlib #[plot #graph

Plot the distribution in dice game

# numpy and matplotlib imported, seed set

# Simulate random walk 500 times
all_walks = []
for i in range(500) :
    random_walk = [0]
    for x in range(100) :
        step = random_walk[-1]
        dice = np.random.randint(1,7)
        if dice <= 2:
            step = max(0, step - 1)
        elif dice <= 5:
            step = step + 1
        else:
            step = step + np.random.randint(1,7)
        if np.random.rand() <= 0.001 :
            step = 0
        random_walk.append(step)
    all_walks.append(random_walk)

# Create and plot np_aw_t
np_aw_t = np.transpose(np.array(all_walks))

# Select last row from np_aw_t: ends
ends = np_aw_t[-1, :]

# Plot histogram of ends, display plot
plt.hist(ends)
plt.show()

#javascript #array #operaciónmate #for

Suma de solo números positivos

function positiveSum(arr) {
  var total = 0;    
  for (i = 0; i < arr.length; i++) {   
    if (arr[i] > 0) {                   // if arr[i] es mayor a 0
      total += arr[i];                  // dar el total de la suma de esos arr[i]
    }
  }
  return total;                         // return total
}

#prompt #for

Input

print("hello " + input("What is your name?") + "!")

first player pick two digit number and then second player pick another two digit number. now add both the numbers and show me the result.
player_one = int(input("pick a two digit number: "))
player_two = int(input("pick a two digit number: "))

answer = player_one + player_two
print(f"The result is {answer}")

for of loop with index and entries

Save snippets that work from anywhere online with our extensions

Comments

More like this

JS

Browse more snippets >>

for of loop with index and entries

Save snippets that work from anywhere online with our extensions

Comments

More like this

JS

Browse more snippets >>

Embed code snippet