MySQLi query returns only one row
mysqli_result::fetch_array only fetches a single row as an array, you are looking for mysqli_result::fetch_all to fetch all the rows. More info here http://php.net/manual/en/mysqli-result.fetch-all.php
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How to insert a row in an HTML table body in JavaScript
If you want to add a row into the tbody, get a reference to it and call its insertRow method. var tbodyRef = document.getElementById(‘myTable’).getElementsByTagName(‘tbody’)[0]; // Insert a row at the end of table var newRow = tbodyRef.insertRow(); // Insert a cell at the end of the row var newCell = newRow.insertCell(); // Append a text … Read more
Pandas dataframe get first row of each group
>>> df.groupby(‘id’).first() value id 1 first 2 first 3 first 4 second 5 first 6 first 7 fourth If you need id as column: >>> df.groupby(‘id’).first().reset_index() id value 0 1 first 1 2 first 2 3 first 3 4 second 4 5 first 5 6 first 6 7 fourth To get n first records, you … Read more
Find row where values for column is maximal in a pandas DataFrame
Use the pandas idxmax function. It’s straightforward: >>> import pandas >>> import numpy as np >>> df = pandas.DataFrame(np.random.randn(5,3),columns=[‘A’,’B’,’C’]) >>> df A B C 0 1.232853 -1.979459 -0.573626 1 0.140767 0.394940 1.068890 2 0.742023 1.343977 -0.579745 3 2.125299 -0.649328 -0.211692 4 -0.187253 1.908618 -1.862934 >>> df[‘A’].idxmax() 3 >>> df[‘B’].idxmax() 4 >>> df[‘C’].idxmax() 1 Alternatively you … Read more
How do I add indexes to MySQL tables?
ALTER TABLE `table` ADD INDEX `product_id_index` (`product_id`) Never compare integer to strings in MySQL. If id is int, remove the quotes.
How to add a new row to datagridview programmatically
You can do: DataGridViewRow row = (DataGridViewRow)yourDataGridView.Rows[0].Clone(); row.Cells[0].Value = “XYZ”; row.Cells[1].Value = 50.2; yourDataGridView.Rows.Add(row); or: DataGridViewRow row = (DataGridViewRow)yourDataGridView.Rows[0].Clone(); row.Cells[“Column2”].Value = “XYZ”; row.Cells[“Column6”].Value = 50.2; yourDataGridView.Rows.Add(row); Another way: this.dataGridView1.Rows.Add(“five”, “six”, “seven”,”eight”); this.dataGridView1.Rows.Insert(0, “one”, “two”, “three”, “four”); From: http://msdn.microsoft.com/en-us/library/system.windows.forms.datagridview.rows.aspx
Bootstrap 4.0 Grid System Layout not working
You’re just missing a basic Bootstrap “rule”. From the docs.. In a grid layout, content must be placed within columns and only columns may be immediate children of rows. In Bootstrap 4, .col- that are not placed in .row will stack vertically. https://www.codeply.com/go/GlA3IP7oGU <div class=”row”> <div class=”col-12 col-sm-12 col-md-6 col-xl-6″ style=”border-left: solid 1px #ffbfbf;”> <div … Read more
C# how to check if a string contains 3 times the same letters in a row [closed]
Sometimes (rarely) regexes are the response to the question, especially if the question is like this. bool ism1 = Regex.IsMatch(“AABAC”, @”(.)\1\1″); // false bool ism2 = Regex.IsMatch(“AAABC”, @”(.)\1\1″); // true Matches any character (.) followed by the first match (\1) twice.