117 lines
3.1 KiB
JavaScript
117 lines
3.1 KiB
JavaScript
// vectors
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(function(baselib) {
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var exports = {};
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baselib.vectors = exports;
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Vector = function(n, initialElements) {
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this.elts = new Array(n);
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if (initialElements) {
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for (var i = 0; i < n; i++) {
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this.elts[i] = initialElements[i];
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}
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} else {
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for (var i = 0; i < n; i++) {
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this.elts[i] = undefined;
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}
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}
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this.mutable = true;
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};
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Vector.makeInstance = function(n, elts) {
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return new Vector(n, elts);
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}
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Vector.prototype.length = function() {
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return this.elts.length;
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};
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Vector.prototype.ref = function(k) {
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return this.elts[k];
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};
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Vector.prototype.set = function(k, v) {
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this.elts[k] = v;
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};
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Vector.prototype.equals = function(other, aUnionFind) {
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if (other != null && other != undefined && other instanceof Vector) {
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if (other.length() != this.length()) {
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return false
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}
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for (var i = 0; i < this.length(); i++) {
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if (! plt.baselib.equality.equals(this.elts[i], other.elts[i], aUnionFind)) {
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return false;
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}
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}
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return true;
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} else {
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return false;
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}
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};
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Vector.prototype.toList = function() {
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var ret = plt.baselib.lists.EMPTY;
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for (var i = this.length() - 1; i >= 0; i--) {
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ret = plt.baselib.lists.Cons.makeInstance(this.elts[i], ret);
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}
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return ret;
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};
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Vector.prototype.toWrittenString = function(cache) {
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cache.put(this, true);
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var texts = [];
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for (var i = 0; i < this.length(); i++) {
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texts.push(plt.baselib.format.toWrittenString(this.ref(i), cache));
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}
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return "#(" + texts.join(" ") + ")";
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};
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Vector.prototype.toDisplayedString = function(cache) {
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cache.put(this, true);
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var texts = [];
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for (var i = 0; i < this.length(); i++) {
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texts.push(plt.baselib.format.toDisplayedString(this.ref(i), cache));
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}
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return "#(" + texts.join(" ") + ")";
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};
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Vector.prototype.toDomNode = function(cache) {
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cache.put(this, true);
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var node = document.createElement("span");
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node.appendChild(document.createTextNode("#("));
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for (var i = 0; i < this.length(); i++) {
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node.appendChild(plt.baselib.format.toDomNode(this.ref(i), cache));
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if (i !== this.length()-1) {
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node.appendChild(document.createTextNode(" "));
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}
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}
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node.appendChild(document.createTextNode(")"));
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return node;
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};
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var isVector = function(x) { return x instanceof Vector; };
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var makeVector = function() {
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return Vector.makeInstance(arguments.length, arguments);
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};
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var makeVectorImmutable = function() {
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var v = Vector.makeInstance(arguments.length, arguments);
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v.mutable = false;
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return v;
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};
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//////////////////////////////////////////////////////////////////////
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exports.Vector = Vector;
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exports.isVector = isVector;
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exports.makeVector = makeVector;
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exports.makeVectorImmutable = makeVectorImmutable;
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})(this['plt'].baselib); |