Javascript 如何从表达式更改“到”和“从”日期？

我从服务器获取json数据，在服务器中获取日期表达式，如“t+1”、“t+2”、“t-1”。t代表当前或系统日期。我需要将这些表达式更改为日期。如果

t

是今天的日期2016-03-14。然后

t-1

2016-03-13。我们可以在javascript中更改此表达式吗

这是我得到的东西 输入

   [
      {
        "column": {
          "name": "a",
          "userId": "dipu"

        },
        "deal": {
          "dealNumbers": [],
          "fromDateExpression": {
            "expression": "t-1",
            "date": "2016-03-08"
          },
          "toDateExpression": {
            "expression": "t",
            "date": "2016-03-08"
          }
        }
      },
      {
        "column": {
          "name": "bb_test",
          "userId": "dipu"
        },
        "deal": {
          "dealNumbers": [
            "HH_2282825"
          ],
          "fromDateExpression": {
            "expression": "t+1",
            "date": "2016-03-09"
          },
          "toDateExpression": {
            "expression": "t+7",
            "date": "2016-03-17"
          }
        }
      },
      {
        "column": {
          "name": "my view",
          "userId": "dipu",
          "associatedWithAView": false
        },
        "deal": {
          "dealNumbers": [
            "HH_2282759"
          ],
          "fromDateExpression": {
            "expression": "t+2",
            "date": "2016-02-19"
          },
          "toDateExpression": {
            "expression": "t+3",
            "date": "2016-02-19"
          }
        }
      }
    ] 

我需要转换json数组

这是预期的产出

[
  {
    "column": {
      "name": "a",
      "userId": "dipu"

    },
    "deal": {
      "dealNumbers": [],
      "fromDateExpression": {
        "expression": "t-1",
        "date": "2016-03-13"
      },
      "toDateExpression": {
        "expression": "t",
        "date": "2016-03-14"
      }
    }
  },
  {
    "column": {
      "name": "bb_test",
      "userId": "dipu"
    },
    "deal": {
      "dealNumbers": [
        "HH_2282825"
      ],
      "fromDateExpression": {
        "expression": "t+1",
        "date": "2016-03-15"
      },
      "toDateExpression": {
        "expression": "t+7",
        "date": "2016-03-21"
      }
    }
  },
  {
    "column": {
      "name": "my view",
      "userId": "dipu",
      "associatedWithAView": false
    },
    "deal": {
      "dealNumbers": [
        "HH_2282759"
      ],
      "fromDateExpression": {
        "expression": "t+2",
        "date": "2016-03-16"
      },
      "toDateExpression": {
        "expression": "t+3",
        "date": "2016-02-17"
      }
    }
  }
]

我可以用regex吗..因为有很多像

t+5

，

t+6

，

怎么样

（我想指出一点——下面的代码完全有效）

---

这与预期的不一样。请删除您的答案谢谢您的帮助..我们可以更改日期yyyy-mm-dd的格式吗..例如2016-03-15，您可以为此包含您的代码，因为您已经编写了

changedatefromfromexpress

中的代码抱歉..创建日期后我没有收到..我无法格式化日期

[
  {
    "column": {
      "name": "a",
      "userId": "dipu"

    },
    "deal": {
      "dealNumbers": [],
      "fromDateExpression": {
        "expression": "t-1",
        "date": "2016-03-13"
      },
      "toDateExpression": {
        "expression": "t",
        "date": "2016-03-14"
      }
    }
  },
  {
    "column": {
      "name": "bb_test",
      "userId": "dipu"
    },
    "deal": {
      "dealNumbers": [
        "HH_2282825"
      ],
      "fromDateExpression": {
        "expression": "t+1",
        "date": "2016-03-15"
      },
      "toDateExpression": {
        "expression": "t+7",
        "date": "2016-03-21"
      }
    }
  },
  {
    "column": {
      "name": "my view",
      "userId": "dipu",
      "associatedWithAView": false
    },
    "deal": {
      "dealNumbers": [
        "HH_2282759"
      ],
      "fromDateExpression": {
        "expression": "t+2",
        "date": "2016-03-16"
      },
      "toDateExpression": {
        "expression": "t+3",
        "date": "2016-02-17"
      }
    }
  }
]

Date.prototype.गांवारू=function(d){return new Date(this.valueOf()+864E5*d);};

function ლ_ಠ益ಠ_ლ(ಠ_ಠ){
    var π = ಠ_ಠ.getDate();
    var ಠ = ("0" + (ಠ_ಠ.getMonth() + 1)).slice(-2);
    var शैतानआरहाहै = ಠ_ಠ.getFullYear();
    return शैतानआरहाहै+'-'+ಠ+'-'+π;
}

var जावास्क्रिप्ट = data.map(function(el){

    var Hͫ̆̒̐ͣ̊̄ͯ͗͏̵̗̻̰̠̬͝ͅE̴̷̬͎̱̘͇͍̾ͦ͊͒͊̓̓̐_̫̠̱̩̭̤͈̑̎̋ͮͩ̒͑̾͋͘Ç̳͕̯̭̱̲̣̠̜͋̍O̴̦̗̯̹̼ͭ̐ͨ̊̈͘͠M̶̝̠̭̭̤̻͓͑̓̊ͣͤ̎͟͠E̢̞̮̹͍̞̳̣ͣͪ͐̈T̡̯̳̭̜̠͕͌̈́̽̿ͤ̿̅̑Ḧ̱̱̺̰̳̹̘̰́̏ͪ̂̽͂̀͠  = new Date();
      el.deal.fromDateExpression.date = ლ_ಠ益ಠ_ლ(Hͫ̆̒̐ͣ̊̄ͯ͗͏̵̗̻̰̠̬͝ͅE̴̷̬͎̱̘͇͍̾ͦ͊͒͊̓̓̐_̫̠̱̩̭̤͈̑̎̋ͮͩ̒͑̾͋͘Ç̳͕̯̭̱̲̣̠̜͋̍O̴̦̗̯̹̼ͭ̐ͨ̊̈͘͠M̶̝̠̭̭̤̻͓͑̓̊ͣͤ̎͟͠E̢̞̮̹͍̞̳̣ͣͪ͐̈T̡̯̳̭̜̠͕͌̈́̽̿ͤ̿̅̑Ḧ̱̱̺̰̳̹̘̰́̏ͪ̂̽͂̀͠ .गांवारू(el.deal.fromDateExpression.expression.match(/t(.*)/)[1]));
      el.deal.toDateExpression.date = ლ_ಠ益ಠ_ლ(Hͫ̆̒̐ͣ̊̄ͯ͗͏̵̗̻̰̠̬͝ͅE̴̷̬͎̱̘͇͍̾ͦ͊͒͊̓̓̐_̫̠̱̩̭̤͈̑̎̋ͮͩ̒͑̾͋͘Ç̳͕̯̭̱̲̣̠̜͋̍O̴̦̗̯̹̼ͭ̐ͨ̊̈͘͠M̶̝̠̭̭̤̻͓͑̓̊ͣͤ̎͟͠E̢̞̮̹͍̞̳̣ͣͪ͐̈T̡̯̳̭̜̠͕͌̈́̽̿ͤ̿̅̑Ḧ̱̱̺̰̳̹̘̰́̏ͪ̂̽͂̀͠ .गांवारू(el.deal.toDateExpression.expression.match(/t(.*)/)[1]));

      return el;
})
console.log(जावास्क्रिप्ट);