diff options
| -rw-r--r-- | media/d3.js | 270 | ||||
| -rw-r--r-- | media/d3.layout.js | 113 | ||||
| -rw-r--r-- | media/d3.layout.min.js | 2 | ||||
| -rw-r--r-- | media/d3.min.js | 4 |
4 files changed, 251 insertions, 138 deletions
diff --git a/media/d3.js b/media/d3.js index 9b77bec1..23edb6b1 100644 --- a/media/d3.js +++ b/media/d3.js @@ -10,7 +10,7 @@ try { d3_style_setProperty.call(this, name, value + "", priority); }; } -d3 = {version: "2.3.0"}; // semver +d3 = {version: "2.4.3"}; // semver var d3_array = d3_arraySlice; // conversion for NodeLists function d3_arrayCopy(pseudoarray) { @@ -59,6 +59,24 @@ d3.ascending = function(a, b) { d3.descending = function(a, b) { return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN; }; +d3.mean = function(array, f) { + var n = array.length, + a, + m = 0, + i = -1, + j = 0; + if (arguments.length === 1) { + while (++i < n) if (d3_number(a = array[i])) m += (a - m) / ++j; + } else { + while (++i < n) if (d3_number(a = f.call(array, array[i], i))) m += (a - m) / ++j; + } + return j ? m : undefined; +}; +d3.median = function(array, f) { + if (arguments.length > 1) array = array.map(f); + array = array.filter(d3_number); + return array.length ? d3.quantile(array.sort(d3.ascending), .5) : undefined; +}; d3.min = function(array, f) { var i = -1, n = array.length, @@ -87,6 +105,9 @@ d3.max = function(array, f) { } return a; }; +function d3_number(x) { + return x != null && !isNaN(x); +} d3.sum = function(array, f) { var s = 0, n = array.length, @@ -472,10 +493,11 @@ d3.format = function(specifier) { comma = match[7], precision = match[8], type = match[9], - percentage = false, + scale = 1, + suffix = "", integer = false; - if (precision) precision = precision.substring(1); + if (precision) precision = +precision.substring(1); if (zfill) { fill = "0"; // TODO align = "="; @@ -484,22 +506,36 @@ d3.format = function(specifier) { switch (type) { case "n": comma = true; type = "g"; break; - case "%": percentage = true; type = "f"; break; - case "p": percentage = true; type = "r"; break; - case "d": integer = true; precision = "0"; break; + case "%": scale = 100; suffix = "%"; type = "f"; break; + case "p": scale = 100; suffix = "%"; type = "r"; break; + case "d": integer = true; precision = 0; break; + case "s": scale = -1; type = "r"; break; } + // If no precision is specified for r, fallback to general notation. + if (type == "r" && !precision) type = "g"; + type = d3_format_types[type] || d3_format_typeDefault; return function(value) { - var number = percentage ? value * 100 : +value, - negative = (number < 0) && (number = -number) ? "\u2212" : sign; // Return the empty string for floats formatted as ints. - if (integer && (number % 1)) return ""; + if (integer && (value % 1)) return ""; - // Convert the input value to the desired precision. - value = type(number, precision); + // Convert negative to positive, and record the sign prefix. + var negative = (value < 0) && (value = -value) ? "\u2212" : sign; + + // Apply the scale, computing it from the value's exponent for si format. + if (scale < 0) { + var prefix = d3.formatPrefix(value, precision); + value *= prefix.scale; + suffix = prefix.symbol; + } else { + value *= scale; + } + + // Convert to the desired precision. + value = type(value, precision); // If the fill character is 0, the sign and group is applied after the fill. if (zfill) { @@ -516,9 +552,8 @@ d3.format = function(specifier) { var length = value.length; if (length < width) value = new Array(width - length + 1).join(fill) + value; } - if (percentage) value += "%"; - return value; + return value + suffix; }; }; @@ -529,12 +564,13 @@ var d3_format_types = { g: function(x, p) { return x.toPrecision(p); }, e: function(x, p) { return x.toExponential(p); }, f: function(x, p) { return x.toFixed(p); }, - r: function(x, p) { - var n = x ? 1 + Math.floor(1e-15 + Math.log(x) / Math.LN10) : 1; - return d3.round(x, p - n).toFixed(Math.max(0, Math.min(20, p - n))); - } + r: function(x, p) { return d3.round(x, p = d3_format_precision(x, p)).toFixed(Math.max(0, Math.min(20, p))); } }; +function d3_format_precision(x, p) { + return p - (x ? 1 + Math.floor(Math.log(x + Math.pow(10, 1 + Math.floor(Math.log(x) / Math.LN10) - p)) / Math.LN10) : 1); +} + function d3_format_typeDefault(x) { return x + ""; } @@ -547,6 +583,26 @@ function d3_format_group(value) { while (i > 0) t.push(value.substring(i -= 3, i + 3)); return t.reverse().join(",") + f; } +var d3_formatPrefixes = ["y","z","a","f","p","n","μ","m","","k","M","G","T","P","E","Z","Y"].map(d3_formatPrefix); + +d3.formatPrefix = function(value, precision) { + var i = 0; + if (value) { + if (value < 0) value *= -1; + if (precision) value = d3.round(value, d3_format_precision(value, precision)); + i = 1 + Math.floor(1e-12 + Math.log(value) / Math.LN10); + i = Math.max(-24, Math.min(24, Math.floor((i <= 0 ? i + 1 : i - 1) / 3) * 3)); + } + return d3_formatPrefixes[8 + i / 3]; +}; + +function d3_formatPrefix(d, i) { + return { + scale: Math.pow(10, (8 - i) * 3), + symbol: d + }; +} + /* * TERMS OF USE - EASING EQUATIONS * @@ -780,10 +836,10 @@ d3.interpolateRgb = function(a, b) { bg = b.g - ag, bb = b.b - ab; return function(t) { - return "rgb(" + Math.round(ar + br * t) - + "," + Math.round(ag + bg * t) - + "," + Math.round(ab + bb * t) - + ")"; + return "#" + + d3_rgb_hex(Math.round(ar + br * t)) + + d3_rgb_hex(Math.round(ag + bg * t)) + + d3_rgb_hex(Math.round(ab + bb * t)); }; }; @@ -867,7 +923,8 @@ function d3_uninterpolateClamp(a, b) { } d3.rgb = function(r, g, b) { return arguments.length === 1 - ? d3_rgb_parse("" + r, d3_rgb, d3_hsl_rgb) + ? (r instanceof d3_Rgb ? d3_rgb(r.r, r.g, r.b) + : d3_rgb_parse("" + r, d3_rgb, d3_hsl_rgb)) : d3_rgb(~~r, ~~g, ~~b); }; @@ -892,17 +949,17 @@ d3_Rgb.prototype.brighter = function(k) { if (g && g < i) g = i; if (b && b < i) b = i; return d3_rgb( - Math.min(255, Math.floor(r / k)), - Math.min(255, Math.floor(g / k)), - Math.min(255, Math.floor(b / k))); + Math.min(255, Math.floor(r / k)), + Math.min(255, Math.floor(g / k)), + Math.min(255, Math.floor(b / k))); }; d3_Rgb.prototype.darker = function(k) { k = Math.pow(0.7, arguments.length ? k : 1); return d3_rgb( - Math.max(0, Math.floor(k * this.r)), - Math.max(0, Math.floor(k * this.g)), - Math.max(0, Math.floor(k * this.b))); + Math.floor(k * this.r), + Math.floor(k * this.g), + Math.floor(k * this.b)); }; d3_Rgb.prototype.hsl = function() { @@ -914,7 +971,9 @@ d3_Rgb.prototype.toString = function() { }; function d3_rgb_hex(v) { - return v < 0x10 ? "0" + v.toString(16) : v.toString(16); + return v < 0x10 + ? "0" + Math.max(0, v).toString(16) + : Math.min(255, v).toString(16); } function d3_rgb_parse(format, rgb, hsl) { @@ -1151,7 +1210,8 @@ for (var d3_rgb_name in d3_rgb_names) { } d3.hsl = function(h, s, l) { return arguments.length === 1 - ? d3_rgb_parse("" + h, d3_rgb_hsl, d3_hsl) + ? (h instanceof d3_Hsl ? d3_hsl(h.h, h.s, h.l) + : d3_rgb_parse("" + h, d3_rgb_hsl, d3_hsl)) : d3_hsl(+h, +s, +l); }; @@ -1180,7 +1240,7 @@ d3_Hsl.prototype.rgb = function() { }; d3_Hsl.prototype.toString = function() { - return "hsl(" + this.h + "," + this.s * 100 + "%," + this.l * 100 + "%)"; + return this.rgb().toString(); }; function d3_hsl_rgb(h, s, l) { @@ -1331,6 +1391,21 @@ d3_selectionPrototype.attr = function(name, value) { : (name.local ? attrConstantNS : attrConstant))); }; d3_selectionPrototype.classed = function(name, value) { + var names = name.split(d3_selection_classedWhitespace), + n = names.length, + i = -1; + if (arguments.length > 1) { + while (++i < n) d3_selection_classed.call(this, names[i], value); + return this; + } else { + while (++i < n) if (!d3_selection_classed.call(this, names[i])) return false; + return true; + } +}; + +var d3_selection_classedWhitespace = /\s+/g; + +function d3_selection_classed(name, value) { var re = new RegExp("(^|\\s+)" + d3.requote(name) + "(\\s+|$)", "g"); // If no value is specified, return the first value. @@ -1375,7 +1450,7 @@ d3_selectionPrototype.classed = function(name, value) { ? classedFunction : value ? classedAdd : classedRemove); -}; +} d3_selectionPrototype.style = function(name, value, priority) { if (arguments.length < 3) priority = ""; @@ -1856,10 +1931,28 @@ function d3_transition(groups, id) { return groups; } +var d3_transitionRemove = {}; + +function d3_transitionNull(d, i, a) { + return a != "" && d3_transitionRemove; +} + function d3_transitionTween(b) { - return typeof b === "function" - ? function(d, i, a) { var v = b.call(this, d, i) + ""; return a != v && d3.interpolate(a, v); } - : (b = b + "", function(d, i, a) { return a != b && d3.interpolate(a, b); }); + + function transitionFunction(d, i, a) { + var v = b.call(this, d, i); + return v == null + ? a != "" && d3_transitionRemove + : a != v && d3.interpolate(a, v); + } + + function transitionString(d, i, a) { + return a != b && d3.interpolate(a, b); + } + + return typeof b === "function" ? transitionFunction + : b == null ? d3_transitionNull + : (b += "", transitionString); } var d3_transitionPrototype = [], @@ -1899,6 +1992,7 @@ d3_transitionPrototype.select = function(selector) { d3_transitionPrototype.selectAll = function(selector) { var subgroups = [], subgroup, + subnodes, node; if (typeof selector !== "function") selector = d3_selection_selectorAll(selector); @@ -1906,9 +2000,10 @@ d3_transitionPrototype.selectAll = function(selector) { for (var j = -1, m = this.length; ++j < m;) { for (var group = this[j], i = -1, n = group.length; ++i < n;) { if (node = group[i]) { - subgroups.push(subgroup = selector.call(node.node, node.node.__data__, i)); - for (var k = -1, o = subgroup.length; ++k < o;) { - subgroup[k] = {node: subgroup[k], delay: node.delay, duration: node.duration}; + subnodes = selector.call(node.node, node.node.__data__, i); + subgroups.push(subgroup = []); + for (var k = -1, o = subnodes.length; ++k < o;) { + subgroup.push({node: subnodes[k], delay: node.delay, duration: node.duration}); } } } @@ -1920,24 +2015,24 @@ d3_transitionPrototype.attr = function(name, value) { return this.attrTween(name, d3_transitionTween(value)); }; -d3_transitionPrototype.attrTween = function(name, tween) { - name = d3.ns.qualify(name); +d3_transitionPrototype.attrTween = function(nameNS, tween) { + var name = d3.ns.qualify(nameNS); function attrTween(d, i) { var f = tween.call(this, d, i, this.getAttribute(name)); - return f && function(t) { - this.setAttribute(name, f(t)); - }; + return f === d3_transitionRemove + ? (this.removeAttribute(name), null) + : f && function(t) { this.setAttribute(name, f(t)); }; } function attrTweenNS(d, i) { var f = tween.call(this, d, i, this.getAttributeNS(name.space, name.local)); - return f && function(t) { - this.setAttributeNS(name.space, name.local, f(t)); - }; + return f === d3_transitionRemove + ? (this.removeAttributeNS(name.space, name.local), null) + : f && function(t) { this.setAttributeNS(name.space, name.local, f(t)); }; } - return this.tween("attr." + name, name.local ? attrTweenNS : attrTween); + return this.tween("attr." + nameNS, name.local ? attrTweenNS : attrTween); }; d3_transitionPrototype.style = function(name, value, priority) { if (arguments.length < 3) priority = ""; @@ -1948,9 +2043,9 @@ d3_transitionPrototype.styleTween = function(name, tween, priority) { if (arguments.length < 3) priority = ""; return this.tween("style." + name, function(d, i) { var f = tween.call(this, d, i, window.getComputedStyle(this, null).getPropertyValue(name)); - return f && function(t) { - this.style.setProperty(name, f(t), priority); - }; + return f === d3_transitionRemove + ? (this.style.removeProperty(name), null) + : f && function(t) { this.style.setProperty(name, f(t), priority); }; }); }; d3_transitionPrototype.text = function(value) { @@ -2113,9 +2208,12 @@ function d3_scale_nice(domain, nice) { dx = x0; x0 = x1; x1 = dx; } - nice = nice(x1 - x0); - domain[i0] = nice.floor(x0); - domain[i1] = nice.ceil(x1); + if (dx = x1 - x0) { + nice = nice(dx); + domain[i0] = nice.floor(x0); + domain[i1] = nice.ceil(x1); + } + return domain; } @@ -3147,16 +3245,17 @@ function d3_svg_area(projection) { x1 = d3_svg_lineX, y0 = 0, y1 = d3_svg_lineY, - interpolate = "linear", - interpolator = d3_svg_lineInterpolators[interpolate], + interpolate, + i0, + i1, tension = .7; function area(d) { if (d.length < 1) return null; var points0 = d3_svg_linePoints(this, d, x0, y0), points1 = d3_svg_linePoints(this, d, x0 === x1 ? d3_svg_areaX(points0) : x1, y0 === y1 ? d3_svg_areaY(points0) : y1); - return "M" + interpolator(projection(points1), tension) - + "L" + interpolator(projection(points0.reverse()), tension) + return "M" + i0(projection(points1), tension) + + "L" + i1(projection(points0.reverse()), tension) + "Z"; } @@ -3198,7 +3297,8 @@ function d3_svg_area(projection) { area.interpolate = function(x) { if (!arguments.length) return interpolate; - interpolator = d3_svg_lineInterpolators[interpolate = x]; + i0 = d3_svg_lineInterpolators[interpolate = x]; + i1 = i0.reverse || i0; return area; }; @@ -3208,9 +3308,12 @@ function d3_svg_area(projection) { return area; }; - return area; + return area.interpolate("linear"); } +d3_svg_lineStepBefore.reverse = d3_svg_lineStepAfter; +d3_svg_lineStepAfter.reverse = d3_svg_lineStepBefore; + d3.svg.area = function() { return d3_svg_area(Object); }; @@ -3545,6 +3648,20 @@ d3.svg.axis = function() { selection.each(function(d, i, j) { var g = d3.select(this); + // If selection is a transition, create subtransitions. + var transition = selection.delay ? function(o) { + var id = d3_transitionInheritId; + try { + d3_transitionInheritId = selection.id; + return o.transition() + .delay(selection[j][i].delay) + .duration(selection[j][i].duration) + .ease(selection.ease()); + } finally { + d3_transitionInheritId = id; + } + } : Object; + // Ticks. var ticks = scale.ticks.apply(scale, tickArguments_), tickFormat = tickFormat_ == null ? scale.tickFormat.apply(scale, tickArguments_) : tickFormat_; @@ -3580,37 +3697,33 @@ d3.svg.axis = function() { switch (orient) { case "bottom": { tickTransform = d3_svg_axisX; - subtickUpdate.attr("y2", tickMinorSize); - tickEnter.select("text").attr("dy", ".71em").attr("text-anchor", "middle"); - tickUpdate.select("line").attr("y2", tickMajorSize); - tickUpdate.select("text").attr("y", Math.max(tickMajorSize, 0) + tickPadding); + subtickUpdate.attr("x2", 0).attr("y2", tickMinorSize); + tickUpdate.select("line").attr("x2", 0).attr("y2", tickMajorSize); + tickUpdate.select("text").attr("x", 0).attr("y", Math.max(tickMajorSize, 0) + tickPadding).attr("dy", ".71em").attr("text-anchor", "middle"); pathUpdate.attr("d", "M" + range[0] + "," + tickEndSize + "V0H" + range[1] + "V" + tickEndSize); break; } case "top": { tickTransform = d3_svg_axisX; - subtickUpdate.attr("y2", -tickMinorSize); - tickEnter.select("text").attr("text-anchor", "middle"); - tickUpdate.select("line").attr("y2", -tickMajorSize); - tickUpdate.select("text").attr("y", -(Math.max(tickMajorSize, 0) + tickPadding)); + subtickUpdate.attr("x2", 0).attr("y2", -tickMinorSize); + tickUpdate.select("line").attr("x2", 0).attr("y2", -tickMajorSize); + tickUpdate.select("text").attr("x", 0).attr("y", -(Math.max(tickMajorSize, 0) + tickPadding)).attr("dy", "0em").attr("text-anchor", "middle"); pathUpdate.attr("d", "M" + range[0] + "," + -tickEndSize + "V0H" + range[1] + "V" + -tickEndSize); break; } case "left": { tickTransform = d3_svg_axisY; - subtickUpdate.attr("x2", -tickMinorSize); - tickEnter.select("text").attr("dy", ".32em").attr("text-anchor", "end"); - tickUpdate.select("line").attr("x2", -tickMajorSize); - tickUpdate.select("text").attr("x", -(Math.max(tickMajorSize, 0) + tickPadding)); + subtickUpdate.attr("x2", -tickMinorSize).attr("y2", 0); + tickUpdate.select("line").attr("x2", -tickMajorSize).attr("y2", 0); + tickUpdate.select("text").attr("x", -(Math.max(tickMajorSize, 0) + tickPadding)).attr("y", 0).attr("dy", ".32em").attr("text-anchor", "end"); pathUpdate.attr("d", "M" + -tickEndSize + "," + range[0] + "H0V" + range[1] + "H" + -tickEndSize); break; } case "right": { tickTransform = d3_svg_axisY; - subtickUpdate.attr("x2", tickMinorSize); - tickEnter.select("text").attr("dy", ".32em"); - tickUpdate.select("line").attr("x2", tickMajorSize); - tickUpdate.select("text").attr("x", Math.max(tickMajorSize, 0) + tickPadding); + subtickUpdate.attr("x2", tickMinorSize).attr("y2", 0); + tickUpdate.select("line").attr("x2", tickMajorSize).attr("y2", 0); + tickUpdate.select("text").attr("x", Math.max(tickMajorSize, 0) + tickPadding).attr("y", 0).attr("dy", ".32em").attr("text-anchor", "start"); pathUpdate.attr("d", "M" + tickEndSize + "," + range[0] + "H0V" + range[1] + "H" + tickEndSize); break; } @@ -3623,13 +3736,6 @@ d3.svg.axis = function() { subtickEnter.call(tickTransform, scale0); subtickUpdate.call(tickTransform, scale); subtickExit.call(tickTransform, scale); - - function transition(o) { - return selection.delay ? o.transition() - .delay(selection[j][i].delay) - .duration(selection[j][i].duration) - .ease(selection.ease()) : o; - } }); } diff --git a/media/d3.layout.js b/media/d3.layout.js index bcfddc04..2bfb9d32 100644 --- a/media/d3.layout.js +++ b/media/d3.layout.js @@ -560,9 +560,9 @@ d3.layout.partition = function() { node.y = node.depth * dy; node.dx = dx; node.dy = dy; - if (children) { + if (children && (n = children.length)) { var i = -1, - n = children.length, + n, c, d; dx = node.value ? dx / node.value : 0; @@ -576,9 +576,9 @@ d3.layout.partition = function() { function depth(node) { var children = node.children, d = 0; - if (children) { + if (children && (n = children.length)) { var i = -1, - n = children.length; + n; while (++i < n) d = Math.max(d, depth(children[i])); } return 1 + d; @@ -1477,9 +1477,9 @@ d3.layout.tree = function() { function secondWalk(node, x) { node.x = node._tree.prelim + x; var children = node.children; - if (children) { + if (children && (n = children.length)) { var i = -1, - n = children.length; + n; x += node._tree.mod; while (++i < n) { secondWalk(children[i], x); @@ -1584,18 +1584,21 @@ function d3_layout_treeSeparation(a, b) { // } function d3_layout_treeLeft(node) { - return node.children ? node.children[0] : node._tree.thread; + var children = node.children; + return children && children.length ? children[0] : node._tree.thread; } function d3_layout_treeRight(node) { - return node.children ? node.children[node.children.length - 1] : node._tree.thread; + var children = node.children, + n; + return children && (n = children.length) ? children[n - 1] : node._tree.thread; } function d3_layout_treeSearch(node, compare) { var children = node.children; - if (children) { + if (children && (n = children.length)) { var child, - n = children.length, + n, i = -1; while (++i < n) { if (compare(child = d3_layout_treeSearch(children[i], compare), node) > 0) { @@ -1621,11 +1624,11 @@ function d3_layout_treeDeepest(a, b) { function d3_layout_treeVisitAfter(node, callback) { function visit(node, previousSibling) { var children = node.children; - if (children) { + if (children && (n = children.length)) { var child, previousChild = null, i = -1, - n = children.length; + n; while (++i < n) { child = children[i]; visit(child, previousChild); @@ -1693,57 +1696,61 @@ d3.layout.treemap = function() { // Recursively arranges the specified node's children into squarified rows. function squarify(node) { - if (!node.children) return; - var rect = pad(node), - row = [], - children = node.children.slice(), // copy-on-write - child, - best = Infinity, // the best row score so far - score, // the current row score - u = Math.min(rect.dx, rect.dy), // initial orientation - n; - scale(children, rect.dx * rect.dy / node.value); - row.area = 0; - while ((n = children.length) > 0) { - row.push(child = children[n - 1]); - row.area += child.area; - if ((score = worst(row, u)) <= best) { // continue with this orientation - children.pop(); - best = score; - } else { // abort, and try a different orientation - row.area -= row.pop().area; - position(row, u, rect, false); - u = Math.min(rect.dx, rect.dy); + var children = node.children; + if (children && children.length) { + var rect = pad(node), + row = [], + remaining = children.slice(), // copy-on-write + child, + best = Infinity, // the best row score so far + score, // the current row score + u = Math.min(rect.dx, rect.dy), // initial orientation + n; + scale(remaining, rect.dx * rect.dy / node.value); + row.area = 0; + while ((n = remaining.length) > 0) { + row.push(child = remaining[n - 1]); + row.area += child.area; + if ((score = worst(row, u)) <= best) { // continue with this orientation + remaining.pop(); + best = score; + } else { // abort, and try a different orientation + row.area -= row.pop().area; + position(row, u, rect, false); + u = Math.min(rect.dx, rect.dy); + row.length = row.area = 0; + best = Infinity; + } + } + if (row.length) { + position(row, u, rect, true); row.length = row.area = 0; - best = Infinity; } + children.forEach(squarify); } - if (row.length) { - position(row, u, rect, true); - row.length = row.area = 0; - } - node.children.forEach(squarify); } // Recursively resizes the specified node's children into existing rows. // Preserves the existing layout! function stickify(node) { - if (!node.children) return; - var rect = pad(node), - children = node.children.slice(), // copy-on-write - child, - row = []; - scale(children, rect.dx * rect.dy / node.value); - row.area = 0; - while (child = children.pop()) { - row.push(child); - row.area += child.area; - if (child.z != null) { - position(row, child.z ? rect.dx : rect.dy, rect, !children.length); - row.length = row.area = 0; + var children = node.children; + if (children && children.length) { + var rect = pad(node), + remaining = children.slice(), // copy-on-write + child, + row = []; + scale(remaining, rect.dx * rect.dy / node.value); + row.area = 0; + while (child = remaining.pop()) { + row.push(child); + row.area += child.area; + if (child.z != null) { + position(row, child.z ? rect.dx : rect.dy, rect, !remaining.length); + row.length = row.area = 0; + } } + children.forEach(stickify); } - node.children.forEach(stickify); } // Computes the score for the specified row, as the worst aspect ratio. diff --git a/media/d3.layout.min.js b/media/d3.layout.min.js index e49c8c71..c7016b5c 100644 --- a/media/d3.layout.min.js +++ b/media/d3.layout.min.js @@ -1 +1 @@ -(function(){function bc(a,b){var 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