20 January 2022

If python is misbehaving on the server, do these three things at the command line.

echo "source /opt/rh/rh-python36/enable" >> .bashrc
source .bashrc
python

This generates linked JavaScript, CSS, an JS files.


#!/usr/bin/python
from sys import argv
root = argv[1]
outFile = open(root + ".html", "w")
outFile.write("<!doctype html>\n")
outFile.write("<!--Author: Morrison-->\n")
outFile.write("""
<html lang="en">
<head>
<title>%s</title>
<meta charset="utf-8"/>
<link rel="stylesheet" href="%s.css"/>
<script src="%s.js">
</script>
</head>
<body>
</body>
</html>""" %(root, root, root))
outFile.close()
outFile = open(root + ".css", "w")
outFile.write("""/*Author: Morrison*/
h1, h2, .display
{
    text-align:center;
}
canvas
{
    border:solid 1px black;
}
""")
outFile.close()
outFile = open(root + ".js", "w")
outFile.write("/*Author: Morrison*/\n")
outFile.close();

Here is table.css


table, th, td
{
    border: solid 1px black;
    border-collapse: collapse;
}
table
{
    margin-left:auto;
    margin-right:auto;
}
th, td
{
    padding:.5em;
}
th
{
    background-color:#001A57;
    color: white;
}

Yesterday's Problems Let's generate solutions.

Arrays

concat(array)Concatenates array to this array.
every(predicate) returns true if the predicate is true for every element of the array.
fill(obj) fills this array with the specified object
filter(predicate) returns a new array with all elements in this array for which the predicate evaluates to true
find(predicate) finds the first element in this array for which the predicate evaluaates to true
findIndex finds the index of first element in this array for which the predicate evaluaates to true
forEach(f) Calls the function f for each element of the array.
includes(obj) returns true if obj is in this array.
indexOf(obj) returns the index for obj if is in this array and -1 otherwise.
map(f) returns a new array containing all the f(k) for k in this array.
push(obj) appends obj to this array and return the array's new size.
pop() removes the last element of the array and returns it.
shift removes the first element of the array and returns it.
unshift(obj) Inserts obj at the beginning of this array.
sort(comp) If no argument is passed, it sorts the elements in the array asciicographically, using their string representations. Pass the comparator (a, b) => a - b to sort a numerical array.

Nodes and Nodelists A node is an element on a web page. The function document.getElementById() returns a node. Nodes are als called HTMLElements.

Objects

Primitive vs. Object Let's generate solutions.

Classes