我正在用OCaml做一个学校项目,在进行递归调用时,我必须尽可能地使用最大限度的终端递归调用,但是我不知道如何使用计数器,即使是老师认为有可能的计数器。能帮个忙吗?
let getContactId cl f p = match cl with
| [] -> exit -1
| (fn, ln, age, mail, tel)::tl when f = All -> if p = fn || p = ln || p = age || p = mail || p = tel then 0
我正在尝试自动安装slack。我运行.dmg,然后必须双击"Slack“图标才能开始安装。在图像上使用‘click’函数是不可行的,我猜..我看到这个图片调用的网址是file:///Volumes/Slack.app/Slack.app/,我需要在这个链接上调用吗?如何才能获得相同的结果双击图像。 Accessibility Inspector Screenshot tell application "Finder" set myFolder to container of (path to me) as alias end tell tell applica
当我将数据POST到我的应用程序时,我会将其写入一个文件,并通过PUT与其他实例共享。我想从POST返回每个流的状态(文件和PUT)。 putResults是一个数组,它是封闭类的一部分,用于保存每个请求的结果。 我如何收集回复?我可以从createWriteStreams返回一组Promise,但是我怎么能req.pipe到它们呢?你可以流到一个承诺吗? post(req, res, next) {
let listeners = this.getWriteStreams();
let c = listeners.length;
for (i = 0; i &l
我使用的是Ubuntu16.04。我想安装一个与ROS相关的"apt-get安装“包,但是它不起作用。终端机上写着如下。
$ sudo apt-get install ros-kinetic-libuvc
Reading package lists... Done
Building dependency tree
Reading state information... Done
You might want to run 'apt-get -f install' to correct these:
The following packages have
我尝试在Bash中选择一些输出的一部分,但不知道将过滤器放在哪里,并且对我得到的输出感到困惑。
我从
declare -a pythons=("python" "python2" "python3")
for p in "${pythons[@]}"
do
echo "$p: $($p --version 2>&1) in $(which $p)" && for i in $(which -a $p); do echo " $i ($($i --version 2
我想将我的Ubuntu从18.04.6LTS升级到20.04.3LTS,但是在运行do-release-upgrade时有一个错误:
Cannot upgrade
Your python3 install is corrupted. Please fix the '/usr/bin/python3'
symlink.
我注意到python指向我的虚拟环境,即使它没有被激活。
user@abc-lenovo-ideapad-710s-13isk$ which python
/home/user/python/env/bin/python
我的问题是如何使python指向/u
我已经将PYTHON_TARGETS="python2_7 python3_5 python3_4"添加到我的/etc/portage/make.conf中。
当尝试安装任何支持python目标的程序时,会发生以下情况:
sudo emerge --ask dev-python/google-api-python-client
These are the packages that would be merged, in order:
Calculating dependencies... done!
[ebuild N ] dev-python/httplib2
我试图使用Qt创建者编译,但它返回163个错误。
C:\User\Kato\Desktop\Qt projects\PythonQt-build-desktop-Qt_4_7_4_for_Desktop_-_MinGW_4_4__Qt_SDK__Debug\src....\PythonQt2.0.1\src\PythonQtStdDecorators.h:46:错误: Python.h:没有这样的文件或目录
还有其他的目录。
我安装了python3.2,并将prf文件更改为:
# profile to include and link Python
# Change this var
npm install node-sass
npm WARN deprecated har-validator@5.1.5: this library is no longer supported
npm WARN deprecated uuid@3.4.0: Please upgrade to version 7 or higher. Older versions may use Math.random() in certain circumstances, which is known to be problematic. See https://v8.dev/blog/math
在克隆我的项目之后,我尝试安装不同的包并运行它,但不幸的是,在安装依赖项时,会遇到这些错误。我无法安装任何依赖项或其他任何东西。有人知道这是怎么回事吗?提前谢谢
npm WARN deprecated request@2.81.0: request has been deprecated, see https://github.com/request/request/issues/3142
npm WARN deprecated uuid@3.4.0: Please upgrade to version 7 or higher. Older versions may use Ma