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设备发现（DeviceDiscovery）使用指导 · App Inventor 2 中文网
...scovered(设备JSON) {
标签1.Text = 设备JSON
}
when DeviceDiscovery1.Error(错误信息) {
标签1.Text = 错误信息
}
案例二：停止扫描并查看当前列表
when 按钮_停止.Click() {
DeviceDiscovery1.StopDiscovery()
标签1.Text = DeviceDiscovery1.G...
MySQL Removing Some Foreign keys
... it can be necessary to drop the KEY itself at some point. If you have any error message to create another index like the last one, I mean with the same name, it would be useful dropping everything related to that index.
ALTER TABLE your_table_with_fk
drop FOREIGN KEY name_of_your_fk_from_show_cr...
Displaying the #include hierarchy for a C++ file in Visual Studio
...eature, which shows the direct include hierarchy related to a compile-time error, and which also displays line numbers.
– Paul
Dec 16 '13 at 10:11
2
...
How to make a great R reproducible example
...monstrate the problem
the minimal runnable code necessary to reproduce the error, which can be run on the given dataset
the necessary information on the used packages, R version, and system it is run on.
in the case of random processes, a seed (set by set.seed()) for reproducibility1
For examples ...
How to fix corrupted git repository?
...m first
# and re-clone them after (with `git submodule update --init`)
#
# Error codes:
# 1: If a url is not supplied, and one cannot be read from .git/config
# 4: If the url cannot be reached
# 5: If a git submodule is detected
if [[ "$(find -name .git -not -path ./.git | wc -l)" -gt 0 ]] ;
then
...
ReactJS: Modeling Bi-Directional Infinite Scrolling
...
Your JSFiddle currently throws an error: Uncaught ReferenceError: generate is not defined
– Meglio
Jan 31 '16 at 4:45
3
...
do you have kcachegrind like profiling tools for mac [closed]
...ling macports and did sudo port install valgrind kcachegrind, This was the error for both apps ------------------- Warning: No index(es) found! Have you synced your source indexes? Error: Port kcachegrind not found---------------- any clue whats going on
– indianwebdevil
...
How to create a new database using SQLAlchemy?
...
I get this error when trying this exact codeblock: psycopg2.OperationalError: fe_sendauth: no password supplied. When using "postgres://test:abc123@localhost:5432/test" I get psycopg2.OperationalError: FATAL: password authentication fa...
Dropping Unique constraint from MySQL table
...
Error Message:"You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '(player_id,year,tournament)' at line 1"
– Ankur Mukhe...
How do I escape a single quote ( ' ) in JavaScript? [duplicate]
...
Alright. I made a user error... Put in in the wrong spot.
– Matthew
Apr 21 '13 at 19:06
...