jquery function formatDollar(num) { var p = num.toFixed(2).split("."); return "$" + p[0].split("").reverse().reduce(function(acc, num, i, orig) { return num == "-" ? acc : num + (i && !(i % 3) ?...
what is the similar expression for NaN in JS? typeof NaN = number , NaN is a number type, so is it a 64 floating point number in js like any other number? feels that NaN is similar to 0 for the numerical type ~ ~ num, it will be converted to a ...
Do not automatically increase when dragging to the right at 08:00. What should I do? Currently, 1 hour will be added automatically when dragging. ...
Hello, I am a beginner of Unicode. Look it up on the Unicode web site and list the words of all the numbers. Unicode (General_Category=Decimal_Number) I have a question: why are the numbers in Chinese not included and classified according to what c...
I now have a set of data that is looped through v-for, in which a data is given red when it needs to be greater than zero and green when it is below zero. What are the ways to implement the code? I want to write it in the loop body and make a judgment a...
express set app.use (express.static (path.join (_ _ dirname, public ), nginx) do you still need to configure static resources? ...
problem description when using d3.js to do a bar chart demo, you want to add mouse interactive event listening to the bar chart. The direct listening event is added to the growth animation of the element in the form of a chain call to report an error:...
var p1 = new Promise(function (resolve, reject) { setTimeout(function(){ resolve(1); console.log( p1 ); },5000) }); var p2 = new Promise(function (resolve, reject) { resolve(p1); }).then(function(data){ console.log(da...
I encountered a headache when I used Java to develop serial communication projects. At present, the project has been successful on Windows32&64, but it always reports an error on Linux, which seems to be due to the JVM exception caused by the serial por...
problem description there is a shopping cart cartList field under the user table. The field type is as follows: cartList: [ { shopId: { type: Schema.ObjectId }, shopName: String, goodsList: [ ...