How can i list has same id data with while loop in PHP? [closed]

Order your results by series_id, so all the products with the same value will be together. $stmt = $pdo->prepare(“SELECT series_id, product_name FROM yourTable ORDER BY series_id”); $stmt->execute(); Then when displaying the results, show the Series header and start a new <ul> whenever it changes: $last_series = null; echo “<ul>\n”; while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) { if … Read more

How do I replace while loops with a functional programming alternative without tail call optimization?

An example in JavaScript Here’s an example using JavaScript. Currently, most browsers do not support tail call optimisation and therefore the following snippet will fail const repeat = n => f => x => n === 0 ? x : repeat (n – 1) (f) (f(x)) console.log(repeat(1e3) (x => x + 1) (0)) // 1000 … Read more

How do I plot in real-time in a while loop using matplotlib?

Here’s the working version of the code in question (requires at least version Matplotlib 1.1.0 from 2011-11-14): import numpy as np import matplotlib.pyplot as plt plt.axis([0, 10, 0, 1]) for i in range(10): y = np.random.random() plt.scatter(i, y) plt.pause(0.05) plt.show() Note the call to plt.pause(0.05), which both draws the new data and runs the GUI’s … Read more