小编Ren*_*ino的帖子

我需要安装这个特定版本(7.19.0)pycurl.

当我尝试使用此命令安装时:

pip install pycurl == 7.19.0

我收到了这个错误.

Failed building wheel for pycurl   Running setup.py clean for pycurl Failed to build pycurl Installing collected packages: pycurl

..... // MULTIPLE LINES

 build/temp.linux-x86_64-2.7/src/pycurl.o: na função `initpycurl':
    /tmp/pip-build-4Q4V7Q/pycurl/src/pycurl.c:3904: referência indefinida para `PyEval_InitThreads'
    collect2: error: ld returned 1 exit status
    error: command 'x86_64-linux-gnu-gcc' failed with exit status 1

    ---------------------------------------- Command "/home/user/.virtualenvs/myenv/bin/python2 -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-4Q4V7Q/pycurl/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-UlYKto-record/install-record.txt --single-version-externally-managed --compile --install-headers /home/user/.virtualenvs/myenv/include/site/python2.7/pycurl" failed with error code 1 in …

我想在webpack中使用同一文件使用多个条目，但要传递一个变量。

我的想法是对每个条目使用webpack.definePlugin。

例：

{
  entry: {
    file1: 'myfile.js',
    file2: 'myfile.js',
  },
  output: {
    filename: '[name]/myjs.js'
  }
}

我设置了插件：

{
   plugins: [
     new webpack.DefinePlugin({
        MYVARTOFILE: 'a',
        filename: 'file1/myjs.js' // I want to make something like this
     }),
     new webpack.DefinePlugin({
        MYVARTOFILE: 'b',
        filename: 'file2/myjs.js' // I want to make something like this
     })
   ]
}

或者，如果可能，可以通过其他方式将变量传递给每个条目。
如果可以：

  entry: {
    file1: 'myfile.js?variable=a',
    file2: 'myfile.js?variable=b',
  }

并在我的文件中获取该变量。

我正在学习函数式编程,我想实现这样的东西.

while(true) do
  if(somethingHappensHere) {
    break
  }
  counter++
end
return counter

如何使用elixir以功能方式完成此操作？

谢谢你.

我在 Ubuntu 中安装了 Emacs，但无法卸载（也无法再安装任何东西）

? sudo apt-get install tig
Reading package lists... Done
Building dependency tree       
Reading state information... Done
You might want to run 'apt --fix-broken install' to correct these.
The following packages have unmet dependencies:
 emacs-bin-common : Depends: emacs-common (= 1:26.1+1-3.2ubuntu2) but it is not going to be installed
 emacs-el : Depends: emacs-common (= 1:26.1+1-3.2ubuntu2) but it is not going to be installed
 emacs-gtk : Depends: emacs-common (= 1:26.1+1-3.2ubuntu2) but it is not going to be installed
E: …

我想创建一个函数来接收一个Vec和一个位置来改变一个数字.

在JavaScript中,这非常简单:

function replaceNumber(line, position, number) {
  return [
    ...line.slice(0, position),
    number,
    ...line.slice(position+1, line.length)
  ]
}

如何在Rust中创建类似的功能？

我试过这个:

fn replace_number(line: Vec<i32>, point: i32, number: i32) -> Vec<i32> {
    return [
        &line[0..point as usize],
        &[number],
        &line[point as usize+1, point.len()]
    ].concat();
}

结果是一个数组数组.如何像JavaScript示例一样进行解构？