var datas = [
{
name: "",
sex: "female",
age: 30
},
{
name: "",
sex: "male",
age: 20
},
{
name: "",
sex: "female",
age: 40
}
];how to use reduce () to find the sum of age without for,map (),
datas.reduce(function(pre, next) {
return pre + next.age;
}, 0);The horizontal coordinates of echarts are not specifically marked, and the X coordinates do not have a grid to indicate. Here is a figure that specifies . js * * createChartSix() { this.$http .get(this.$api.dataChart) .then(rsp => { ...
sincerely ask for advice: < hr > I want to use node as the background to build a video streaming server. The front end is similar to Youku VOD. It can record the playback node function, and load the progress bar at any point (starting from the c...
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description: a regular match is given to the content of an input box, and the matching content is the product activation code. looks like this: "0C31-0B81-BB32-3094-0C31-0B81-BB32-3094 " Code: $( -sharplicenseCode ).keyup(function () { le...
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how to find all the NA characters in a HMLT page and replace it with "and invalid " with native JS ...
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what does the code circled in the following picture mean? ...
I look at a html ui project with items such as: var apiserver = window[ apiserver ]; url = apiserver + "filterUrlController getUrlData"; I searched the whole project and couldn t find the value of window [ apiserver ]. How do you un...
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How does the code return only the result after the last asynchronous operation in the for loop is completed as shown in the figure? Please stop by and give me a hand. ...