[英]JavaScript Storing Data in 2-D Array
I would like to check elements in Data array and display as "O" if it contains that Month and Number in a table. 我想检查数据数组中的元素,如果它在表中包含该月份和数字,则显示为“ O”。 So for "Jan-1",
Array1[0][0]
should be displayed as "O" but code below doesn't work. 因此,对于“ Jan-1”,
Array1[0][0]
应该显示为“ O”,但下面的代码不起作用。 Can someone help me? 有人能帮我吗?
var Data = ["Jan-1", "Feb-4", "Apr-5"];
var Month= ["Jan", "Feb", "Mar", "Apr", "May"];
var Number = ["1", "2", "3", "4", "5"];
var Array1 = [[]];
for (var k = 0; k < Data.length; k++) {
var split = Data[k].split("-");
for (var z = 0; z < Month.length; z++) {
for (var s = 0; s < Number.length; s++) {
if (Month[z] == split[0] && period[s] == split[1]) {
Array1[z][s] = "O";
} else {
Array1[z][s] = "X";
}
}
}
}
number/month | Jan | Feb | Mar | Apr | May
------------------------------------------------------
1 | O | X | X | X | X
2 | X | X | X | X | X
3 | X | X | X | X | X
4 | X | O | X | X | X
5 | X | X | X | O | X
You should loop over Number
and Month
array, and each time check if the combination Month[j] + "-" + Number[i]
is in the Data
array: 您应该遍历
Number
和Month
数组,并每次检查是否Month[j] + "-" + Number[i]
在Data
数组中:
var Data = ["Jan-1", "Feb-4", "Apr-5"]; var Month = ["Jan", "Feb", "Mar", "Apr", "May"]; var Number = ["1", "2", "3", "4", "5"]; var result = []; for (var i = 0; i < Number.length; i++) { // foreach number result[i] = []; // create a row for this current number for (var j = 0; j <Month.length; j++) { // for each month if (Data.indexOf(Month[j] + "-" + Number[i]) !== -1) { // check if the current combination (currentMonth-currentNumber) is in the Data array result[i][j] = "O"; } else { result[i][j] = "X"; } } } result.forEach(function(row) { console.log(row.join(" | ")); });
Analyzing your code: 分析您的代码:
var Data = ["Jan-1", "Feb-4", "Apr-5"];
var Month= ["Jan", "Feb", "Mar", "Apr", "May"];
var Number = ["1", "2", "3", "4", "5"];
var Array1 = [ ["X","X","X","X","X"], ["X","X","X","X","X"], "X","X","X","X","X"], ["X","X","X","X","X"], ["X","X","X","X","X"]]; //Initialise all elements to "X" by default. We shall change only those indexes that match.
for (var k = 0; k < Data.length; k++) {
var split = Data[k].split("-");
for (var z = 0; z < Month.length; z++) {
for (var s = 0; s < Number.length; s++) {
if (Month[z] == split[0] && Number[s] == split[1]) {
Array1[z][s] = "O";
} else {
//Array1[z][s] = "X"; Do not change here as the loop will go over the entire array once for each data. Hence previous matches would get lost!!
}
}
}
}
Finally, console.table(Array1);
最后,
console.table(Array1);
to print values. 打印值。
Comment: While initialising, you are declaring rows as months and columns as days but expect opposite output. 注释:初始化时,您将行声明为月,将列声明为天,但预期输出相反。 So, to generate expected output, print transverse form or change while defining values:
因此,要生成预期的输出,请在定义值时打印横向形式或更改:
if (Month[z] == split[0] && Number[s] == split[1]) {
Array1[s][z] = "O";
}
You could take an object with the given data and iterate month
and number
for returning a new array with the information of 'O'
or 'X'
. 您可以使用具有给定数据的对象,并迭代
month
和number
以返回带有'O'
或'X'
信息的新数组。
var data = ["Jan-1", "Feb-4", "Apr-5"], month = ["Jan", "Feb", "Mar", "Apr", "May"], number = ["1", "2", "3", "4", "5"], result = [], hash = Object.create(null); data.forEach(function(s) { var [m, d] = s.split('-'); hash[m] = hash[m] || {}; hash[m][d] = true; }); result = month.map(function (m, z) { return number.map(function (s) { return (hash[m] || {})[s] ? 'O' : 'X'; }); }); console.log(result);
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