Python pandas dataframe – Concat a looping df to a main df

I’m trying to concatenate a dataframe created in a loop to a main df. It seems that using .copy() or not doesn’t change the fact that every time the loop start again, the main df reset to the looping df. I’ve based my script on Appending pandas dataframes generated in a for loop but it… Read More Python pandas dataframe – Concat a looping df to a main df

JavaScript: counting strings that begin with 'A' within an array – why is my code not counting them all?

I’m trying to code a loop which counts the amount of strings within the variable ‘animals’ that begin with an ‘A’. There are 8, but the console only logs 7 and I’m not sure why. const animals = [‘Alligator’, ‘Fox’, ‘Armadillo’, ‘Tiger’, ‘Anteater’, ‘Raccoon’, ‘Chicken’, ‘Sheep’, ‘Dog’, ‘Antelope’, ‘Albatross’, ‘Cat’, ‘Alpaca’, ‘Ape’, ‘Anaconda’]; let countAnimals… Read More JavaScript: counting strings that begin with 'A' within an array – why is my code not counting them all?

Add columns to existing dataframe with a loop

I try to build a dataframe with the first columns of several other dataframes with a loop. All of them have same index. df1 = pd.DataFrame(np.random.randint(0,100,size=(3, 2)), columns=list(‘AB’), index=(‘class1’, ‘class2’, ‘class3’)) df2 = pd.DataFrame(np.random.randint(0,100,size=(3, 2)), columns=list(‘CD’), index=(‘class1’, ‘class2’, ‘class3’)) df3 = pd.DataFrame(np.random.randint(0,100,size=(3, 2)), columns=list(‘EF’), index=(‘class1’, ‘class2’, ‘class3’)) df = pd.DataFrame( index=(‘class1’, ‘class2’, ‘class3’)) for f… Read More Add columns to existing dataframe with a loop

image loop infinitely after clicking

something wrong with my this code, the images are supposed to loop infinitely every 1 second after i click the start button. but when i clicked, it showed only the first image then stuck. <!DOCTYPE html> <html> <head> <h1> The traffic script</h1> <p> <button type=”button” onClick=”Cool()”><h2>Start</h2></button> </p> <script> function Cool() { setInterval(function() { Timer() },… Read More image loop infinitely after clicking