Add a 'hide' button for each column. It's ugly, but it works for now.

erkul_column_filter.user.js

@@ -0,0 +1,112 @@
+// ==UserScript==
+// @name Erkul Column Filter
+// @namespace https://annabunch.es
+// @version 0.2
+// @description Selectively hide columns on erkul.games
+// @copyright 2021, annabunches@gmail.com
+// @include https://www.erkul.games/*
+// @require https://code.jquery.com/jquery-latest.js
+// @require https://gist.githubusercontent.com/BrockA/2625891/raw/9c97aa67ff9c5d56be34a55ad6c18a314e5eb548/waitForKeyElements.js
+// @grant none
+// ==/UserScript==
+
+waitForKeyElements("tr.mat-header-row", makeColumnFilter);
+waitForKeyElements("div.filter", makeRedundantButton);
+
+function makeButton(text) {
+    let button = $(document.createElement("div"));
+    button.html('<button _ngcontent-dae-c11="" class="mat-focus-indicator mat-stroked-button mat-button-base mat-primary" color="primary" mat-stroked-button=""><span class="mat-button-wrapper">' + text + '</span><span class="mat-button-ripple mat-ripple" matripple=""></span><span class="mat-button-focus-overlay"></span></button>');
+    return button;
+}
+
+function makeColumnFilter(jNode) {
+    let cols = $("th", jNode);
+
+    for (let i = 0; i < $(cols).length; i++) {
+        let button = makeButton("Hide");
+        $(cols[i]).append(button);
+        button.click(function() {
+            hideColumn(i);
+        });
+    }
+}
+
+function makeRedundantButton(jNode) {
+    let button = makeButton("Hide Redundant");
+    jNode.append(button);
+    button.click(function() {
+        let headers = $("tr.mat-header-row th");
+        // get all the rows
+        let rows = $("tr.mat-row");
+        let nCols = $("td", rows[0]).length;
+
+        // for each column...
+        for (let i = 0; i < nCols; i++) {
+            let last = "";
+            let diff = false;
+
+            // ... iterate over every row, checking whether that column is different
+            // on any row. If it is the same everywhere...
+            $.each(rows, function(j, row){
+                let cols = $("td", row);
+                if (last == "") {
+                    last = $(cols[i]).html();
+                } else if ($(cols[i]).html() != last) {
+                    diff = true;
+                }
+            });
+
+            // hide that column.
+            if (diff === false) {
+                hideColumn(i);
+            }
+        }
+    });
+
+    console.log("Erkul Column Filter Plugin fully loaded.");
+}
+
+function getColumnIndex(name) {
+    let i;
+    let found = false;
+    let headers = $("tr.mat-header-row th");
+    for (i = 0; i < headers.length; i++) {
+        if ($(headers[i]).text() == name) {
+            found = true;
+            break;
+        }
+    }
+
+    if (!found) return -1;
+    return i;
+}
+
+function hideColumnByName(name) {
+    let i = getColumnIndex(name);
+    if (i == -1) return;
+    hideColumn(i);
+}
+    
+function hideColumn(i) {
+    $($("tr.mat-header-row th")[i]).hide();
+
+    $.each($("tr.mat-row"), function(j, row) {
+        let cols = $("td", row);
+        $(cols[i]).hide();
+    });
+}
+
+function showColumnByName(name) {
+    let i = getColumnIndex(name);
+    if (i == -1) return;
+    showColumn(i);
+}
+
+function showColumn(i) {
+    $($("tr.mat-header-row th")[i]).show();
+
+    $.each($("tr.mat-row"), function(j, row) {
+        let cols = $("td", row);
+        $(cols[i]).show();
+    });
+}

erkul_redundancy_filter.user.js

@@ -1,67 +0,0 @@
-// ==UserScript==
-// @name Erkul Redundancy Filter
-// @namespace https://annabunch.es
-// @version 0.1
-// @description Hide identical columns on erkul.games
-// @copyright 2021, annabunches
-// @include https://www.erkul.games/*
-// @require https://code.jquery.com/jquery-latest.js
-// @require https://gist.githubusercontent.com/BrockA/2625891/raw/9c97aa67ff9c5d56be34a55ad6c18a314e5eb548/waitForKeyElements.js
-// @grant none
-// ==/UserScript==
-
-console.log("Erkul Redundancy Filter pre-loading.");
-
-waitForKeyElements("div.filter", loadWidgets);
-
-function makeButton() {
-    let button = $(document.createElement("div"));
-    button.html('<button _ngcontent-dae-c11="" class="mat-focus-indicator mat-stroked-button mat-button-base mat-primary" color="primary" mat-stroked-button=""><span class="mat-button-wrapper">Hide Redundant</span><span class="mat-button-ripple mat-ripple" matripple=""></span><span class="mat-button-focus-overlay"></span></button>');
-    return button;
-}
-
-function loadWidgets(jNode) {
-    console.log("Erkul Redundancy Filter loading.");
-    let button = makeButton();
-    $("div.filter").append(button);
-    button.click(function() {
-        // get all the rows
-        let rows = $("tr.mat-row");
-        let nCols = $("td", rows[0]).length;
-
-        // for each column...
-        for (let i = 0; i < nCols; i++) {
-            let last = "";
-            let diff = false;
-
-            // ... iterate over every row, checking whether that column is different
-            // on any row. If it is the same everywhere...
-            $.each(rows, function(j, row){
-                let cols = $("td", row);
-                console.log("Last: " + last);
-                console.log("This: " + $(cols[i]).html());
-                if (last == "") {
-                    last = $(cols[i]).html();
-                } else if ($(cols[i]).html() != last) {
-                    diff = true;
-                }
-            });
-
-            // hide that column.
-            if (diff === false) {
-                $.each(rows, function(j, row) {
-                    let cols = $("td", row);
-                    $(cols[i]).css("display", "none");
-                });
-
-                // and your little header, too
-                let headers = $("tr.mat-header-row th");
-                $(headers[i]).css("display", "none");
-            }
-        }
-    });
-
-    console.log("Erkul Redundancy Filter fully loaded.");
-}
-
-console.log("Erkul Redundancy Filter pre-loaded.");

license.md

@@ -1,7 +1,7 @@
 Copyright 2021 annabunches@gmail.com
 
-⚠️ WARNING! ⚠️
-☢️ 😱 DO NOT USE THIS PROGRAM. 😱 ☢️
+⚠️ WARNING! ⚠️  
+☢️ 😱 DO NOT USE THIS PROGRAM. 😱 ☢️  
 This program is not a program of honor.
 
 No highly esteemed function is executed here.
@@ -13,7 +13,7 @@ without even the implied warranty of MERCHANTABILITY or
 FITNESS FOR A PARTICULAR PURPOSE.
 
 This program is best shunned and left unused (but it is free software,
-and you are welcome to redistribute it under certain conditions).
+and you are welcome to redistribute it under certain conditions).  
 😱 ☢️ DO NOT USE THIS PROGRAM. ☢️ 😱
 
 This program is licensed under the Sandia Message Public License,