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参数用于筛选数组的属性

typescript angular javascript

0

Aragorn · 技术社区 · 7 年前

我有两个几乎相同的函数,只是它们比较数组中对象的不同属性。有没有办法将该属性作为参数,然后将这两个函数合并为一个?

第一个函数,比较属性 credit

  public filterByCredit(filter: string) {

    switch (filter) {
      case 'Non-blanks':
        this.filteredTxs = this.localTransactions.filter(tx => tx.credit);
        break;
      case 'Blanks':
        this.filteredTxs = this.localTransactions.filter(tx => !tx.credit);
        break;
      case '> 500':
        this.filteredTxs = this.localTransactions.filter(tx => tx.credit > 500);
        break;
    }

  }

比较属性的第二个函数 debit

public filterByDebit(filter: string) {
    switch (filter) {
      case 'Non-blanks':
        this.filteredTxs = this.localTransactions.filter(tx => tx.debit);
        break;
      case 'Blanks':
        this.filteredTxs = this.localTransactions.filter(tx => !tx.debit);
        break;
      case '> 500':
        this.filteredTxs = this.localTransactions.filter(tx => tx.debit > 500);
        break;
    }

3 回复 | 直到 7 年前

1

3

Zooly 7 年前

你可以通过考试 key

public filterByDebit(filter: string, key: string) {
    switch (filter) {
        case 'Non-blanks':
            this.filteredTxs = this.localTransactions.filter(tx => tx[key]);
            break;
        case 'Blanks':
            this.filteredTxs = this.localTransactions.filter(tx => !tx[key]);
            break;
        case '> 500':
            this.filteredTxs = this.localTransactions.filter(tx => tx[key] > 500);
            break;
    }
}

2

1

Ashish Ranjan 7 年前

只需发送另一个参数:

public filterByCredetDebit(filter, creditOrDebit) {
    switch (filter) {
        case 'Non-blanks':
            this.filteredTxs = this.localTransactions.filter(tx => tx[creditOrDebit]);
            break;
        case 'Blanks':
            this.filteredTxs = this.localTransactions.filter(tx => !tx[creditOrDebit]);
            break;
        case '> 500':
            this.filteredTxs = this.localTransactions.filter(tx => tx[creditOrDebit] > 500);
            break;
    }
}

3

1

brk 7 年前

credit 或 debit

public filterByType(filter: string,type:string) {
  let __tp
  if(type==='credit'){
    __tp='credit'
  }
  else{
    __tp='debit'
  }
    switch (filter) {
      case 'Non-blanks':
        this.filteredTxs = this.localTransactions.filter(tx => tx[__tp]);
        break;
      case 'Blanks':
        this.filteredTxs = this.localTransactions.filter(tx => !tx[__tp]);
        break;
      case '> 500':
        this.filteredTxs = this.localTransactions.filter(tx => tx[__tp] > 500);
        break;
    }
}