Question

我正在尝试用file2

替换file1中的字符串

FILE1.TXT

import {Component} from angular2/core
import {FormBuilder, Control, ControlGroup, Validators} from 'angular2/common'

@Component({
  selector: 'my-app',
  template: `
    <form [ngFormModel]="form">
      <label for="name">Name:</label>
      <input id="name" type="text" ngControl="name">
      <br>
      <label for="email">Email:</label>
      <input id="email" type="email" ngControl="email">
      <br>
      <div ngControlGroup="matchingPassword">
        <label for="password">Password:</label>
        <input id="password" type="password" ngControl="password">
        <br>
        <label for="confirmPassword">Confirm Password:</label>
        <input id="confirmPassword" type="password" ngControl="confirmPassword">
      </div>
    </form>
    <p>Valid?: {{form.valid}}</p>
    <pre>{{form.value | json}}</pre>
  `
})
export class App {
  form: ControlGroup
  constructor(fb: FormBuilder) {
    this.form = fb.group({
      name: ['', Validators.required],
      email: ['', Validators.required]
      matchingPassword: fb.group({
        password: ['', Validators.required],
        confirmPassword: ['', Validators.required]
      }, {validator: this.areEqual})
    });
  }

  areEqual(group: ControlGroup) {
    let val;
    let valid = true;

    for (name in group.controls) {
      if (val === undefined) {
        val = group.controls[name].value
      } else {
        if (val !== group.controls[name].value) {
          valid = false;
          break;
        }
      }
    }

    if (valid) {
      return null;
    }

    return {
      areEqual: true
    };
  }
}

FILE2.TXT

 This is first line in file.

我想用“Hello World”替换“This”这个词

file1.txt

 Hello world

我尝试使用sed

Hello world is first line in file.

Answer 1

选中link，其中包含：

shell负责扩展变量。如果你使用单身对于字符串的引用，内容将按字面处理

您的解决方案是使用如下双引号：

var=$(< file2.txt)
sed -i "s/This/$var/" file1.txt

如何用其他文件替换文件中的字符串。

1 个答案: