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App Inventor 2 最新QA汇总 - App Inventor 2 中文网 - 清泛IT社区，有思想、有深度
Q：App Inventor 2 中文网和电教馆的网站有什么区别？
A：电教馆的网站基于AI伴侣2.2x版本，代码版本过旧（约5年前）。相应地，文档也过旧，而且仍然是英文的，没有中文化，参考意义不大。
中文网2023/03 通过过一次MIT最新代...
App Inventor 2 接入腾讯云 CloudBase：让你的 App 瞬间拥有专业级后端能力...
...想都别想。
这些限制，让很多优秀的 App 创意止步于"单机时代"。
但现在，这一切有了改变——CloudBase 拓展来了。
什么是 CloudBase？
CloudBase（腾讯云云开发）是腾讯云推出的一站式后端即服务（BaaS）平台。它帮...
Can functions be passed as parameters?
...ist []int) []int {
var a = make([]int, len(alist), len(alist))
for index, val := range alist {
a[index] = f(val)
}
return a
}
func main() {
alist := []int{4, 5, 6, 7}
result := mapper(square, alist)
fmt.Println(result)
}
...
Cluster analysis in R: determine the optimal number of clusters
...ce = "euclidean",
method = "kmeans", min.nc=2, max.nc=15,
index = "alllong", alphaBeale = 0.1)
hist(nb$Best.nc[1,], breaks = max(na.omit(nb$Best.nc[1,])))
# Looks like 3 is the most frequently determined number of clusters
# and curiously, four clusters is not in the output at all!
...
With Git, how do I turn off the “LF will be replaced by CRLF” warning
...g files before refreshing line endings"
Remove every file from Git's index.
git rm --cached -r .
Rewrite the Git index to pick up all the new line endings.
git reset --hard
Add all your changed files back, and prepare them for a commit. This
is your chance to inspect which file...
LINQPad [extension] methods [closed]
... it:
var pb = new Util.ProgressBar("Analyzing data");
pb.Dump();
for (int index = 0; index <= 100; index++)
{
pb.Percent = index;
Thread.Sleep(100);
}
share
|
improve this answer
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How can I see the raw SQL queries Django is running?
Is there a way to show the SQL that Django is running while performing a query?
16 Answers
...
Django - limiting query results
...
I tried this and got "Negative indexing is not supported."
– bparker
Mar 10 '19 at 19:32
...
Only get hash value using md5sum (without filename)
... element of a bash array can be addressed by just the name without the [0] index, ie, $md5 contains only the 32 chars of the md5sum.
md5=($(md5sum file))
echo $md5
# 53c8fdfcbb60cf8e1a1ee90601cc8fe2
share
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...
How to check Oracle database for long running queries
...
This one shows SQL that is currently "ACTIVE":-
select S.USERNAME, s.sid, s.osuser, t.sql_id, sql_text
from v$sqltext_with_newlines t,V$SESSION s
where t.address =s.sql_address
and t.hash_value = s.sql_hash_value
and s.status = 'ACTIVE'
and...