Question

我有以下脚本。

我试图在调用saySomething（）函数后设置showMsg变量。它需要设置为true或false，具体取决于我对saySomething函数的处理方式。

有了这个，我得到了不确定。在调用saySomething函数后如何设置showMsg？

$(document).ready(function(){

   var showMsg;

   (function() {
       saySomething("something something darkside, something something complete!",
                 function() { showMsg = true;  console.log('aww yis') },
                 function() { showMsg = false; console.log('ooo noo') } );
})();


    console.log(' showMsg = ' + showMsg);

    function saySomething(strText, functionOne,functionTwo){
      console.log("From saySomething : " + strText);
    }  

});

Answer 1

你必须实际执行其中一个功能才能产生效果。我不知道你的逻辑是什么，但是类似于以下内容：

$(document).ready(function(){

   var showMsg;

   (function() {
       saySomething("something something darkside, something something complete!",
                 function() { showMsg = true;  console.log('aww yis') },
                 function() { showMsg = false; console.log('ooo noo') } );
})();


    console.log(' showMsg = ' + showMsg);

    function saySomething(strText, functionOne,functionTwo){
      alert(strText);
      if (strText === "something something darkside, something something complete!") {
        functionOne();
      } else {
        functionTwo();
      }
    }  

});

Answer 2

我想你想要这样的东西

const listings = [{ // sample listings with multiple listing_id and duplicates
  "listing_id": 1,
  "furniture_id": 2,
  "price": 129.99,
  "duration": null,
  "photo_id": 1,
  "url": "http://d3otkl9byfilk1.cloudfront.net/images/COHG3---A_Graceland-Silver-With-Malva-Blue-Grey-Contrast"
}, {
  "listing_id": 1,
  "furniture_id": 2,
  "price": 129.99,
  "duration": null,
  "photo_id": 2,
  "url": "https://www.responsive-checkout.com/demo/media/catalog/product/cache/1/image/9df78eab33525d08d6e5fb8d27136e95/c/o/couch.jpg"
}, {
  "listing_id": 1,
  "furniture_id": 2,
  "price": 129.99,
  "duration": null,
  "photo_id": 2,
  "url": "https://example.com"
}, {
  "listing_id": 2,
  "furniture_id": 2,
  "price": 129.99,
  "duration": null,
  "photo_id": 2,
  "url": "https://www.responsive-checkout.com/demo/media/catalog/product/cache/1/image/9df78eab33525d08d6e5fb8d27136e95/c/o/couch.jpg"
}, {
  "listing_id": 2,
  "furniture_id": 2,
  "price": 129.99,
  "duration": null,
  "photo_id": 2,
  "url": "https://example2.com"
}, {
  "listing_id": 3,
  "furniture_id": 2,
  "price": 129.99,
  "duration": null,
  "photo_id": 2,
  "url": "https://example3.com"
}];

const duplicates = [];

const filteredListings = listings.filter((listing, index, self) => { // filter out all duplicates
  const found = self.findIndex(i => i.listing_id === listing.listing_id);
  if (found !== index) {
    duplicates.push(listing); // add duplicates to duplicate array to be added back in later.
    return false;
  } else return true;
});

duplicates.forEach((duplicate) => { // loop through duplicates to add url back into main array 
  const listIndex = filteredListings.findIndex(listing => listing.listing_id === duplicate.listing_id);
  
  if (Array.isArray(filteredListings[listIndex].url)) {
    filteredListings[listIndex].url.push(duplicate.url);
  } else filteredListings[listIndex].url = [filteredListings[listIndex].url, duplicate.url];
});

document.body.innerHTML = '<pre>' + JSON.stringify(filteredListings, 0, 4) + '</pre>';

这里有一个关于jsfiddle的例子。 [https://jsfiddle.net/dau7awtk/]

希望这可以帮助你。

如何在调用某些函数后正确设置此变量？

2 个答案: