highs - npm Package Compare versions

Comparing version 0.5.0 to 0.6.0

build/highs.js

@@ -10,78 +10,78 @@
 
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+function kc(a,b){return[...a.matchAll(/[^\s]+/g)].filter(c=>" "!==b[c.index]||" "!==b[c.index+c[0].length-1]).map(c=>c[0])}function ec(a,b){let c;try{c=a()}catch(d){c=d}if(0!==c)throw Error("Unable to "+b+". HiGHS error "+c);};
 
@@ -88,0 +88,0 @@

package.json

 {
   "name": "highs",
-  "version": "0.5.0",
+  "version": "0.6.0",
   "description": "Mixed integer linear programming library, built by compiling a high-performance C++ solver developed by the University of Edinburgh (HiGHS) to WebAssembly.",
@@ -5,0 +5,0 @@ "main": "build/highs.js",

README.md

@@ -8,3 +8,3 @@ # highs-js
 This is a javascript mixed integer linear programming library.
-It is built by compiling a high-performance C++ solver developed by the University of Edinburgh, (HiGHS)[HiGHS](https://highs.dev), to WebAssembly using emscripten.
+It is built by compiling a high-performance C++ solver developed by the University of Edinburgh, ([HiGHS](https://highs.dev)), to WebAssembly using emscripten.
 
@@ -11,0 +11,0 @@ ## Demo

src/post.js

@@ -89,3 +89,4 @@ const MODEL_FILENAME = "m.lp";
   _Highs_destroy(highs);
-  const output = parseResult(stdout_lines, status);
+  // The final four lines of the output (whose contents are the objective value) are removed before parsing
+  const output = parseResult(stdout_lines.slice(0, -4), status);
   // Flush the content of stdout and stderr because these streams are not used anymore
@@ -156,12 +157,12 @@ stdout_lines.length = 0;
     throw new Error("Unable to parse solution. Too few lines.");
-  let headers = lineValues(lines[1]);
-  // There is no value for "status" and "dual" when the problem contains integer variables
-  const isLinear = headers.indexOf("Type") === -1;
-  const infeasible = status === "Infeasible";
-  const headersFilter = h => !(
-    (infeasible && (h === "Status" || h === "Dual" || h === "Primal")) ||
-    (!isLinear && (h === "Status" || h === "Dual"))
-  );
-  headers = headers.filter(headersFilter);
-  var result = { "Status": status, "Columns": {}, "Rows": [], "IsLinear": isLinear };
+
+  let headers = headersForNonEmptyColumns(lines[1], lines[2]);
+  
+  // We identity whether the problem is a QP by the available headers: For infeasible
+  // problems, "Status", "Dual", and "Primal" are missing, for integer linear programs,
+  // "Status" and "Dual" are missing, and for QPs, only "Status" is missing
+  const isQuadratic = !headers.includes("Status") && headers.includes("Dual");
+  const isLinear = !headers.includes("Type") && !isQuadratic;
+
+  var result = { "Status": status, "Columns": {}, "Rows": [], "IsLinear": isLinear, "IsQuadratic": isQuadratic };
   for (var i = 2; lines[i] != "Rows"; i++) {
@@ -171,5 +172,8 @@ const obj = lineToObj(headers, lines[i]);
   }
-  headers = lineValues(lines[i + 1]).filter(headersFilter);
-  for (var j = i + 2; j < lines.length; j++) {
-    result["Rows"].push(lineToObj(headers, lines[j]));
+
+  if (lines.length > i + 2) {
+    headers = headersForNonEmptyColumns(lines[i + 1], lines[i + 2]);
+    for (var j = i + 2; j < lines.length; j++) {
+      result["Rows"].push(lineToObj(headers, lines[j]));
+    }
   }
@@ -179,2 +183,18 @@ return result;
 
+/**
+ * Finds the non headers for non-empty columns in a HiGHS output
+ * @param {string} headerLine The line containing the header names
+ * @param {string} firstDataLine The line immediately below the header line
+ * @returns {string[]} The headers for which there is data available
+ */
+function headersForNonEmptyColumns(headerLine, firstDataLine) {
+	// Headers can correspond to empty columns. The contents of a column can be left or right
+	// aligned, so we determine if a given header should be included by looking at whether
+	// the row immediately below the header has any contents.
+	return [...headerLine.matchAll(/[^\s]+/g)].filter(match =>
+		firstDataLine[match.index] !== ' ' ||
+		firstDataLine[match.index + match[0].length - 1] !== ' '
+	).map(match => match[0])
+}
+
 function assert_ok(fn, action) {
@@ -181,0 +201,0 @@ let err;

No alert changes

Improved metrics

Total package byte prevSize

2373851

increased by7.17%

Lines of code

723

increased by1.54%

No dependency changes