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按键可见性的延时设置 - App Inventor 2 中文网 - 清泛IT社区，为创新赋能！
大家好，咨询请教一个问题， APP上面的 按键 当按下一个按键 设置2号按键可见性为假 （这个功能可以实现），但 在设定时间内，比如一个小时，或者更长时间后， 让原先的2号按键的可见性从原来的假 恢复成真
用“计时...
How do I run a Python program in the Command Prompt in Windows 7?
...txt" "some lexicon OUT.txt" -o
Running... Done.
C:\some files>d:
D:\>cd "my scripts"
D:\my scripts>ApplyRE.py "c:\some files\some lexicon.txt" "c:\some files\some lexicon OUT.txt" -o
Running... Done.
Creating shortcuts or batch files
If .py is associated with an installed Python, you can...
Multiple glibc libraries on a single host
..."$(pwd)/glibc/build/install"
git clone git://sourceware.org/git/glibc.git
cd glibc
git checkout glibc-2.28
mkdir build
cd build
../configure --prefix "$glibc_install"
make -j `nproc`
make install -j `nproc`
Setup 1: verify the build
test_glibc.c
#define _GNU_SOURCE
#include <assert.h>
#in...
Automatic exit from bash shell script on error [duplicate]
...ative to the accepted answer that fits in the first line:
#!/bin/bash -e
cd some_dir
./configure --some-flags
make
make install
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How to delete images from a private docker registry?
...the following format:
sha256:6de813fb93debd551ea6781e90b02f1f93efab9d882a6cd06bbd96a07188b073
Run the command given below with manifest value:
curl -v --silent -H "Accept: application/vnd.docker.distribution.manifest.v2+json" -X DELETE http://127.0.0.1:5000/v2/<name>/manifests/sha256:6de81...
How to leave/exit/deactivate a Python virtualenv
...
To activate a Python virtual environment:
$cd ~/python-venv/
$./bin/activate
To deactivate:
$deactivate
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The provider is not compatible with the version of Oracle client
...is a great code comparison of managed vs unmanaged: http://docs.oracle.com/cd/E51173_01/win.122/e17732/intro005.htm#ODPNT148
Ensure you have downloaded the ODP.NET, Managed Driver Xcopy version only
From the downloaded zip file, copy and paste into your project directory:
Oracle.ManagedDataAccessD...
How to fully delete a git repository created with init?
...longer necessary to modify the
finder config this way
You could also type cd (the space is important), drag and drop your git repo folder from Finder to the terminal window, press return, then type rm -fr .git, then return again.
On Ubuntu, use shortcut Ctrl + H.
...
What is the difference between precision and scale?
...7 or more significant digits.
Reference:
http://download.oracle.com/docs/cd/B28359_01/server.111/b28318/datatype.htm#CNCPT1832
That page also has some examples that will make you understand precision and scale.
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How can I install a local gem?
...dle gem foobar
You can install them with rake after they are written:
# cd into your gem directory
rake install
Chances are, that your downloaded gem will know rake install, too.
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improv...