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I have a 2d array in the following format:
export const dataBubble = [
[0, 0, 0],
[0, 1, 0],
[0, 2, 0],
[0, 3, 0],
[0, 4, 0],
[0, 5, 0],
[0, 6, 0],
[0, 7, 0],
[0, 8, 0],
[0, 9, 0],
[0, 10, 0],
[1, 0, 6],
[1, 1, 8],
[1, 2, 5],
[1, 3, 6],
[1, 4, 1],
[1, 5, 4],
[1, 6, 5],
[1, 7, 5],
[1, 8, 4],
[1, 9, 3],
[1, 10, 9],
[2, 0, 5],
[2, 1, 5],
[2, 2, 5],
[2, 3, 6],
[2, 4, 8],
[2, 5, 7],
[2, 6, 8],
[2, 7, 5],
[2, 8, 4],
[2, 9, 2],
[2, 10, 8],
[3, 0, 9],
[3, 1, 5],
[3, 2, 9],
[3, 3, 8],
[3, 4, 5],
[3, 5, 4],
[3, 6, 2],
[3, 7, 5],
[3, 8, 7],
[3, 9, 6],
[3, 10, 3],
[4, 0, 7],
[4, 1, 3],
[4, 2, 9],
[4, 3, 5],
[4, 4, 11],
[4, 5, 6],
[4, 6, 7],
[4, 7, 6],
[4, 8, 4],
[4, 9, 4],
[4, 10, 5],
[5, 0, 1],
[5, 1, 3],
[5, 2, 6],
[5, 3, 8],
[5, 4, 5],
[5, 5, 5],
[5, 6, 4],
[5, 7, 8],
[5, 8, 9],
[5, 9, 2],
[5, 10, 4],
[6, 0, 2],
[6, 1, 1],
[6, 2, 0],
[6, 3, 3],
[6, 4, 8],
[6, 5, 5],
[6, 6, 6],
[6, 7, 2],
[6, 8, 5],
[6, 9, 6],
[6, 10, 4],
[7, 0, 1],
[7, 1, 0],
[7, 2, 5],
[7, 3, 0],
[7, 4, 5],
[7, 5, 8],
[7, 6, 9],
[7, 7, 0],
[7, 8, 7],
[7, 9, 8]
];
We need to reverse the array elements based on the first two elements of the inner array, such that the resultant array becomes:
[
[0,10,0],
[0,9,0],
[0,8,0],
[0,7,0],
[0,6,0],
[0,5,0],
[0,4,0],
[0,3,0],
[0,2,0],
[0,1,0],
[1,10,9],
[1,9,3],
[1,8,4],
[1,7,5],
.
.
.
.
.
.
.
.
.
[7,0,1]
I use this in a react js project, so is there anyway we can use the JS map function of an array to do it? If not what will be the optimal solution?
If your second value is guaranteed to be less than an amount (for example I assumed 1000 in this case) then you can do this:
dataBubble.sort((x, y) => (x[0] - y[0])*1000 + y[1] - x[1]);
Basically we sum them up, but give the first element a higher coefficient, thus making it the primary sorter.
Otherwise, you need to involve an if check:
dataBubble.sort((x, y) => {
if(x[0] == y[0]) {
return y[1] - x[1];
} else {
return x[0] - y[0];
}
});
If you return a negative value from the sort function, JS will put x before y. Otherwise it will put x after y.
If x[0] and y[0] are equal, we need to sort depending on x[1] and y[1]. y[1] - x[1] will be negative if x[1] is larger, therefore if x[1] is larger x will come before y.
If x[0] and y[0] are different we need to sort based on them. x[0] - y[0] will be negative if x[0] is smaller, therefore if x[0] is smaller, x will come before y.
How can i increment one value of my matrix (using the math module; https://mathjs.org/)? The only way, I came up with, was the following (and this can't be the correct/easiest solution...):
matrix = math.ones(2, 2, 2, 2, 2)
//starting matrix: [[[[[1, 1], [1, 1]], [[1, 1], [1, 1]]], [[[1, 1], [1, 1]], [[1, 1], [1, 1]]]], [[[[1, 1], [1, 1]], [[1, 1], [1, 1]]], [[[1, 1], [1, 1]], [[1, 1], [1, 1]]]]]
matrix = math.subset(matrix, math.index(0, 0, 0, 0, 0), math.add(math.subset(matrix, math.index(0, 0, 0, 0, 0)), 1));
console.log(math.print('$x', {x: matrix}));
//output: [[[[[2, 1], [1, 1]], [[1, 1], [1, 1]]], [[[1, 1], [1, 1]], [[1, 1], [1, 1]]]], [[[[1, 1], [1, 1]], [[1, 1], [1, 1]]], [[[1, 1], [1, 1]], [[1, 1], [1, 1]]]]]
As we know normally we can pass array as following to Flot Aria Chart.
var data2 = [
[0, 1], [1, 0], [2, 2], [3, 0], [4, 1], [5, 3], [6, 1], [7, 5], [8, 2], [9, 3], [10, 2], [11, 1], [12, 0], [13, 2], [14, 8], [15, 0], [16, 0]
];
I'm getting an json output from a file and i need to convert that as json object like 'data2' in upper code. i'm running a loop like this.
var data1 = [];
var json = $.getJSON( "config/tsconfig.json", function () {
$.each( json.responseJSON, function( i, item ) {
});
});
And inside of that json file like this.
[[2,"2017-09-27",50,30,25],[2,"2017-09-28",70,50,49],[3,"2017-09-27",50,45,5],[3,"2017-09-28",100,95,90]]
How can i make a json object as in code one. any suggestions to put inside $.each loop?
You have to use map method.
Also, $.getJSON is executing asynchronous, so you need to use a callback function.
getResponse(callback){
$.getJSON( "config/tsconfig.json", function (response) {
let result=response.map(function(item){
return [item[0],item[2]];
});
callback(result);
});
}
getResponse(function(response){
console.log(response);
});
let array=[[2,"2017-09-27",50,30,25],[2,"2017-09-28",70,50,49],[3,"2017-09-27",50,45,5],[3,"2017-09-28",100,95,90]]
array=array.map(function(item){
return [item[0],item[2]];
});
console.log(array);
Using arrow functions.
array=array.map(item=> [item[0],item[2]]);
I've tried all the answers I could find here but I'm lost. I'm making a simple flask app to query a database and present information to my client. I'd like to use google charts but when I output a simple chart it shows up far down the page. I want it to align in the center at the top how can I achieve this without linking to external css? I've tried everything I could find so here is a cleaned up version of my html.
<html>
<head>
<script type="text/javascript" src="https://www.google.com/jsapi"></script>
<script type="text/javascript">
google.load('visualization', '1.0', {'packages':['corechart']});
google.setOnLoadCallback(drawChart);
function drawChart() {
var data = new google.visualization.DataTable();
data.addColumn('string', 'Patients');
data.addColumn('number', 'Date');
data.addRows([
['05/29', 26],
['05/30', 16],
['06/01', 32],
['06/02', 15],
['06/03', 23],
['06/04', 6],
['06/05', 16],
['06/06', 21],
['06/08', 29],
['06/09', 21],
['06/10', 19],
['06/11', 14],
['06/12', 14],
['06/13', 10],
['06/15', 17],
['06/16', 17],
['06/17', 12],
['06/18', 9],
['06/19', 9],
['06/20', 9],
['06/22', 8],
['06/23', 16],
['06/24', 9],
['06/25', 8],
['06/26', 6],
['06/27', 6],
['06/29', 2],
['06/30', 1],
['07/01', 1],
['07/02', 1],
['07/06', 9],
['07/07', 10],
['07/08', 8],
['07/09', 8],
['07/10', 11],
['07/11', 8],
['07/13', 7],
['07/14', 9],
['07/15', 8],
['07/16', 7],
['07/17', 8],
['07/18', 3],
['07/20', 8],
['07/21', 6],
['07/22', 1],
['07/23', 2],
['07/24', 6],
['07/25', 7],
['07/27', 4],
['07/28', 2],
['07/29', 3],
['07/30', 1],
['07/31', 5],
['08/01', 7],
['08/03', 6],
['08/04', 7],
['08/05', 7],
['08/06', 7],
['08/07', 3],
['08/08', 7],
['08/10', 8],
['08/11', 5],
['08/12', 3],
['08/13', 4],
['08/14', 5],
['08/15', 6],
['08/17', 5],
['08/18', 3],
['08/19', 4],
['08/20', 3],
['08/21', 3],
['08/22', 4],
['08/24', 3],
['08/25', 4],
['08/26', 5],
['08/27', 5],
['08/28', 6],
['08/29', 5],
['09/01', 4],
['09/02', 3],
['09/03', 1],
['09/04', 4],
['09/05', 3],
['09/07', 1],
['09/08', 2],
['09/09', 2],
['09/11', 2],
['09/12', 2],
['09/14', 5],
['09/15', 3],
['09/16', 2],
['09/17', 4],
['09/18', 6],
['09/19', 1],
['09/21', 2],
['09/22', 3],
['09/23', 3],
['09/24', 6],
['09/25', 4],
['09/26', 3],
['09/28', 7],
['09/29', 4],
['09/30', 5],
['10/01', 3],
['10/02', 2],
['10/03', 2],
['10/05', 4],
['10/06', 4],
['10/07', 5],
['10/08', 4],
['10/09', 5],
['10/10', 2],
['10/12', 2],
['10/13', 3],
['10/14', 3],
['10/15', 3],
['10/16', 4],
['10/17', 5],
['10/19', 3],
['10/20', 3],
['10/21', 3],
['10/22', 3],
['10/23', 7],
['10/24', 1],
['10/26', 4],
['10/27', 3],
['10/28', 4],
['10/29', 1],
['10/30', 2],
['11/02', 5],
['11/03', 1],
['11/04', 5],
['11/05', 6],
['11/06', 3],
['11/09', 7],
['11/10', 4],
['11/12', 4],
['11/13', 3],
['11/14', 2],
['11/16', 8],
['11/17', 1],
['11/18', 4],
['11/19', 7],
['11/20', 3],
['11/21', 4],
['11/23', 5],
]);
var options = {'title':'Future appointment projections',
'width':750,
'height':4000};
var chart = new google.visualization.BarChart(document.getElementById('chart_div'));
chart.draw(data, options); }
</script>
</head>
<body><div id="chart_div"></div></body></html>
I had to change the chart options like so:
var options = {'title':'Future appointment projections',
'width': 750,
'height': 4000,
'chartArea': {'height': '96%'},
'legend': {'position': 'bottom'}
};
Thanks to Approv3d of reddit for the assist.
I have 3 arrays in javascript. I'd like to combine them all into 1 var, but name each item (like PHP's associate array). So the first item is red, second is green, third is blue. And then how do I call each item separately after?
[[2, 1], [4, 1], [10, 1], [19, 1]],
[[3, 1], [14, 1], [18, 1], [19, 1]],
[[7, 1], [6, 1], [8, 1], [17, 1]]
Do you mean something like this?
var combined = {
red: [[2, 1], [4, 1], [10, 1], [19, 1]],
green: [[3, 1], [14, 1], [18, 1], [19, 1]],
blue: [[7, 1], [6, 1], [8, 1], [17, 1]]
};
Then you can access the arrays as combined.red, combined.green, and combined.blue.