dontcallmedom · March 2, 2018 13:51 · Mar 2, 2018 · Dec 24, 2017 · Dec 24, 2017 · Dec 24, 2017
diff --git a/ReadMe.md b/ReadMe.md
@@ -27,7 +27,7 @@ function toArray(nl)
 ## Stage 1: parse HTML
 
 ```
-var C1 = toArray(document.querySelectorAll("#mw-content-text > table.wikitable tbody tr")).map((tr)=>(
+var C1 = toArray(document.querySelectorAll("#mw-content-text table.wikitable tbody tr")).map((tr)=>(
     toArray(tr.children).map((td)=>(
         td.innerText.trim()
     )

diff --git a/ReadMe.md b/ReadMe.md
@@ -87,6 +87,8 @@ var C2 = C1.map(function(city){
 });
 ```
 
+The result is in C2 and it's an array of objects.
+
 ### Google Chrome console: Copy result to clipboard:
 ```
 copy(JSON.stringify(C2,null,2))

diff --git a/ReadMe.md b/ReadMe.md
@@ -7,7 +7,7 @@ This code runs in the browser debugging console.
 I parse this page to extract geographical coordibates for major cities:  
 https://en.wikipedia.org/w/index.php?title=List_of_cities_by_longitude&printable=yes
 
-Just open this page in your browser then launch your debugging console.
+Just open this page in your browser, launch your debugging console and get ready to copy-paste.
 
 First, define this function, it is a dependency:
 

diff --git a/ReadMe.md b/ReadMe.md
@@ -2,10 +2,14 @@
 
 ... to place markers on a map.
 
-First, I parse this page to extract geographical coordibates for major cities:
+This code runs in the browser debugging console.
+
+I parse this page to extract geographical coordibates for major cities:  
 https://en.wikipedia.org/w/index.php?title=List_of_cities_by_longitude&printable=yes
 
-I need this function, it is a dependency:
+Just open this page in your browser then launch your debugging console.
+
+First, define this function, it is a dependency:
 
 ```
 function toArray(nl) 

diff --git a/ReadMe.md b/ReadMe.md
@@ -1,4 +1,8 @@
-Parsing this page to extract GPS coords for major cities:
+# GPS coordinates of major cities in the world
+
+... to place markers on a map.
+
+First, I parse this page to extract geographical coordibates for major cities:
 https://en.wikipedia.org/w/index.php?title=List_of_cities_by_longitude&printable=yes
 
 I need this function, it is a dependency:
@@ -16,16 +20,20 @@ function toArray(nl)
 }
 ```
 
-// stage 1: parse HTML
-
-// JSON.stringify(toArray(document.querySelectorAll("#mw-content-text > table.wikitable tbody tr")).map((tr)=>(toArray(tr.children).map((td)=>(td.innerText.trim())))).reduce((acc,tbodyArr)=>(acc.concat(tbodyArr))),3)
+## Stage 1: parse HTML
 
-// or simpler:
-
-var C1 = toArray(document.querySelectorAll("#mw-content-text > table.wikitable tbody tr")).map((tr)=>(toArray(tr.children).map((td)=>(td.innerText.trim()))));
+```
+var C1 = toArray(document.querySelectorAll("#mw-content-text > table.wikitable tbody tr")).map((tr)=>(
+    toArray(tr.children).map((td)=>(
+        td.innerText.trim()
+    )
+)
+));
+```
 
-/* we get an array of type:
+The array assigend to C1 is of type:
 
+```
 [
    [
       "16°30′S",
@@ -43,13 +51,13 @@ var C1 = toArray(document.querySelectorAll("#mw-content-text > table.wikitable t
    ],
    // etc.
 ]
+```
 
-*/
-
-// Stage 2: translate to GPS coordinates
-// source: http://stackoverflow.com/a/1140335
 
+## Stage 2: translate to GPS coordinates
+Source: http://stackoverflow.com/a/1140335
 
+```
 function ConvertDMSToDD(degrees, minutes, seconds, direction) {
     var dd = parseInt(degrees) + parseInt(minutes)/60 + parseInt(seconds)/(60*60);
 
@@ -73,6 +81,9 @@ var C2 = C1.map(function(city){
 		"coords" : coords
 	})
 });
+```
 
-// copy result to clipboard (Chrome console only)
-copy(JSON.stringify(C2,null,2))
+### Google Chrome console: Copy result to clipboard:
+```
+copy(JSON.stringify(C2,null,2))
+```
diff --git a/ReadMe.md b/ReadMe.md
@@ -1,8 +1,9 @@
-// Parsing this page to extract GPS coords for major cities:
-// https://en.wikipedia.org/w/index.php?title=List_of_cities_by_longitude&printable=yes
+Parsing this page to extract GPS coords for major cities:
+https://en.wikipedia.org/w/index.php?title=List_of_cities_by_longitude&printable=yes
 
-// I need this function, it is a dependency:
+I need this function, it is a dependency:
 
+```
 function toArray(nl) 
 {
 	var arr = [];
@@ -13,6 +14,7 @@ function toArray(nl)
 	}
 	return(arr);
 }
+```
 
 // stage 1: parse HTML
 

diff --git a/ReadMe.md b/ReadMe.md
@@ -0,0 +1,76 @@
+// Parsing this page to extract GPS coords for major cities:
+// https://en.wikipedia.org/w/index.php?title=List_of_cities_by_longitude&printable=yes
+
+// I need this function, it is a dependency:
+
+function toArray(nl) 
+{
+	var arr = [];
+	if(isNaN(nl.length)) {
+		throw "Cannot get length";
+	} else {
+		for(var i=-1,l=nl.length;++i!==l;arr[i]=nl[i]);		
+	}
+	return(arr);
+}
+
+// stage 1: parse HTML
+
+// JSON.stringify(toArray(document.querySelectorAll("#mw-content-text > table.wikitable tbody tr")).map((tr)=>(toArray(tr.children).map((td)=>(td.innerText.trim())))).reduce((acc,tbodyArr)=>(acc.concat(tbodyArr))),3)
+
+// or simpler:
+
+var C1 = toArray(document.querySelectorAll("#mw-content-text > table.wikitable tbody tr")).map((tr)=>(toArray(tr.children).map((td)=>(td.innerText.trim()))));
+
+/* we get an array of type:
+
+[
+   [
+      "16°30′S",
+      "180°00′W",
+      "Rabi Island",
+      "N/A",
+      "Fiji"
+   ],
+   [
+      "51°53′N",
+      "176°39′W",
+      "Adak",
+      "Alaska",
+      "United States"
+   ],
+   // etc.
+]
+
+*/
+
+// Stage 2: translate to GPS coordinates
+// source: http://stackoverflow.com/a/1140335
+
+
+function ConvertDMSToDD(degrees, minutes, seconds, direction) {
+    var dd = parseInt(degrees) + parseInt(minutes)/60 + parseInt(seconds)/(60*60);
+
+    if (direction == "S" || direction == "W") {
+        dd = dd * -1;
+    } // Don't do anything for N or E
+    return dd;
+}
+
+var C2 = C1.map(function(city){
+	var latLong = [city[0],city[1]];
+	coords = latLong.map(function(l){
+		var p = l.split(/[^\d\w]+/);
+		return ConvertDMSToDD(p[0],p[1],0,p[2]);
+	});
+	return ({
+		"lat/long" : latLong,
+		"name" : city[2],
+		"state" : city[3],
+		"country" :city[4],
+		"coords" : coords
+	})
+});
+
+// copy result to clipboard (Chrome console only)
+copy(JSON.stringify(C2,null,2))
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