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2025-01-28 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Internet Technology >
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This article mainly introduces "how to take the set value of javascript". In the daily operation, I believe that many people have doubts about how to take the set value of javascript. The editor consulted all kinds of data and sorted out a simple and easy-to-use method of operation. I hope it will be helpful to answer the doubt of "how to get the set value of javascript". Next, please follow the editor to study!
How javascript takes the set value: first declare set; through the "var s=new Set ();" method, and then traverse the value of s through the "s.forEach (function (element, sameElement, set) {...}" method.
This article operating environment: windows7 system, javascript1.8.5 version, Dell G3 computer.
How does javascript get the value of set?
JAVASCRIPT traverses set to get the value in set
Subscripts can be used for Array in js, but not for Map and Set. But Array,Map,Set is of type iterable. Use the forEach method built into iterable.
Declare set (currentConfigresult is the value passed in the background after receiving a successful ajax request).
Var s = new Set (); currentConfigresult = data.page.result;for (var j in currentConfigresult) {set.add (currentConfigresult [j] .key);}
Traverse the value of s
S.forEach (function (element, sameElement, set) {if (element = = obj.key) {html + = "KEY already exists";}})
The values of element and sameElement here are the same, both of which are values in set. If map,element corresponds to value and sameElement corresponds to key.
At this point, the study on "how to take the set value of javascript" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!
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