如何检查表中是否已存在相同的变量并将其删除？

Question

当您使用API​​进行搜索时，我正在尝试删除显示在搜索中的所有重复播放器。当新搜索开始时，播放器将保持在桌面上，但是，某些API具有同一播放器的多个副本。隐藏和检查是否有其他玩家是重复的最佳方法是什么？

谢谢

function playerseachMSF() {
  var searchPlayerFN = $("#searchFN").val().trim(); 
  var searchPlayerLN = $("#searchLN").val().trim();
  var searchedPlayer = "";

  //allows user to only search for last name and have fist name be optional
  if (searchPlayerFN == 0) {
    var searchedPlayer = searchPlayerLN;
  } else {
    var searchedPlayer = searchPlayerFN + "-" + searchPlayerLN;
  }

  var playerQueryURL = "https://api.mysportsfeeds.com/v1.1/pull/nfl/2017-regular/active_players.json?" + "player=" + searchedPlayer;
  

  $.ajax({
    type: "GET",
    url: playerQueryURL,
    dataType: 'json',
    async: true,
    headers: {
    "Authorization": "Basic " + btoa("chen" + ":" + "testing")
  },
  }).done(function(response) {
    console.log("PlayerSearch MSF - " + playerQueryURL);

    var playerResults = response.activeplayers.playerentry;

    for (var i = 0; i < playerResults.length; i++) {

      //removes any variables with undifined results
      if (playerResults[i].team !== undefined) {
        var playerResults_FN = playerResults[i].player.FirstName;
        var playerResults_LN = playerResults[i].player.LastName;
        var playerResults_Position = playerResults[i].player.Position;
        var playerResults_Team = playerResults[i].team.Name;
        var playerResults_City = playerResults[i].team.City;
        var playerResults_CityAbbr = playerResults[i].team.Abbreviation;
        var playerResults_IMG = playerResults[i].player.officialImageSrc;
      }
      if (playerResults[i].player.externalMapping !== null) {
        var playerResults_ID = playerResults[i].player.externalMapping.ID;
      }

      //adds players that match searched name to table
      $("#tableSearchList")
        .append($("<tr>")
          .attr("id", playerResults_ID)
          .attr("data-FN", playerResults_FN)
          .attr("data-LN", playerResults_LN)
          .attr("class", "players")
          .append( $("<td>").text(playerResults_FN + " " + playerResults_LN))
          .append( $("<td>").text(playerResults_Team))
          .append( $("<td>").text(playerResults_Position))
        ) //<tr> append
    } //for loop


    // on click for when a player is selected
    $(".players").on("click", function() {
      $("#resultsBox").show();
      $("#searchPanel").hide(1000);



      var playerID = $(this).attr("id");
      var playerFN = $(this).attr("data-FN");
      var playerLN = $(this).attr("data-LN");

      arrestRecord(playerFN, playerLN);
      playerDisplay(playerID);
      displayPlayerStats(playerFN, playerLN);
      playerFantasyStats(playerFN, playerLN)
    })

Answer 1

在添加新行之前，您可以检查表是否已包含具有播放器ID的行。

if ($('#' + playerResults_ID).length === 0) {
    $("#tableSearchList")
        .append($("<tr>")
          .attr("id", playerResults_ID)
          .attr("data-FN", playerResults_FN)
          .attr("data-LN", playerResults_LN)
          .attr("class", "players")
          .append( $("<td>").text(playerResults_FN + " " + playerResults_LN))
          .append( $("<td>").text(playerResults_Team))
          .append( $("<td>").text(playerResults_Position))
        ) //<tr> append
}
//else, player id already exists

Answer 2

添加一系列现有玩家，并在添加新玩家之前进行比较。

function playerseachMSF() {
  var searchPlayerFN = $("#searchFN").val().trim(); 
  var searchPlayerLN = $("#searchLN").val().trim();
  var searchedPlayer = "";
  var alreadyPlaying = []
  //allows user to only search for last name and have fist name be optional
  if (searchPlayerFN == 0) {
    var searchedPlayer = searchPlayerLN;
  } else {
    var searchedPlayer = searchPlayerFN + "-" + searchPlayerLN;
  }

  var playerQueryURL = "https://api.mysportsfeeds.com/v1.1/pull/nfl/2017-regular/active_players.json?" + "player=" + searchedPlayer;
  

  $.ajax({
    type: "GET",
    url: playerQueryURL,
    dataType: 'json',
    async: true,
    headers: {
    "Authorization": "Basic " + btoa("chen" + ":" + "testing")
  },
  }).done(function(response) {
    console.log("PlayerSearch MSF - " + playerQueryURL);

    var playerResults = response.activeplayers.playerentry;

    for (var i = 0; i < playerResults.length; i++) {

      //removes any variables with undifined results
      if (playerResults[i].team !== undefined) {
        var playerResults_FN = playerResults[i].player.FirstName;
        var playerResults_LN = playerResults[i].player.LastName;
        var playerResults_Position = playerResults[i].player.Position;
        var playerResults_Team = playerResults[i].team.Name;
        var playerResults_City = playerResults[i].team.City;
        var playerResults_CityAbbr = playerResults[i].team.Abbreviation;
        var playerResults_IMG = playerResults[i].player.officialImageSrc;
      }
      if (playerResults[i].player.externalMapping !== null) {
        var playerResults_ID = playerResults[i].player.externalMapping.ID;
      }
    if(alreadyPlaying.indexOf(playerResults_ID) == -1) {
      alreadyPlaying.append(playerResults_ID)
      //adds players that match searched name to table
      $("#tableSearchList")
        .append($("<tr>")
          .attr("id", playerResults_ID)
          .attr("data-FN", playerResults_FN)
          .attr("data-LN", playerResults_LN)
          .attr("class", "players")
          .append( $("<td>").text(playerResults_FN + " " + playerResults_LN))
          .append( $("<td>").text(playerResults_Team))
          .append( $("<td>").text(playerResults_Position))
        ) //<tr> append
}
    } //for loop


    // on click for when a player is selected
    $(".players").on("click", function() {
      $("#resultsBox").show();
      $("#searchPanel").hide(1000);



      var playerID = $(this).attr("id");
      var playerFN = $(this).attr("data-FN");
      var playerLN = $(this).attr("data-LN");

      arrestRecord(playerFN, playerLN);
      playerDisplay(playerID);
      displayPlayerStats(playerFN, playerLN);
      playerFantasyStats(playerFN, playerLN)
    })