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oracle10g 网址收藏 - ORACLE - 清泛IT论坛，有思想、有深度
...迅雷进行下载，就不用登陆OTN了：
Oracle Database 10g Release 2 (10.2.0.1.0) Enterprise/Standard Edition for Microsoft Windows (32-bit)
http://download.oracle.com/otn/nt/oracle10g/10201/10201_database_win32.zip
http://download.oracle.com/otn/nt/oracle10g/10201/10201_client_win32.zip
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App Inventor 2 连接调试器的几种方式的比较 - App Inventor 2 中文网 - 清...
App Inventor 2 连接调试器的几种方式的比较app_inventor_2_debug从功能上来说大致分为3类，即：但是每种类型下面仍有一些不同的选择，下面开始介绍各种连接方式的特点。连接方式测试介质特点AI伴侣Android手机特别适合小朋友，简单...
轻松学习App开发？App Inventor 2 中文网搞定！ - App Inventor 2 中文网 -...
轻松学习App开发？App Inventor 2 中文网搞定！chatgpt_ai2有没有想过自己动手开发一个属于自己的应用程序？有没有因为开发难度而望而却步？那么现在，我有一个好消息要告诉你，App Inventor 2 中文网（fun123 cn）能帮你搞定！App Inv ...
Could not calculate build plan: Plugin org.apache.maven.plugins:maven-resources-plugin:2.5 or one of
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29 Answers
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How to calculate the number of occurrence of a given character in each row of a column of strings?
...a")
q.data
# number string number.of.a
#1 1 greatgreat 2
#2 2 magic 1
#3 3 not 0
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How can I check if a program exists from a Bash script?
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How to insert element into arrays at specific position?
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App Inventor 2 AI伴侣有电脑版的吗? - App Inventor 2 中文网 - 清泛网 - 专注C/C++及内核技术
App Inventor 2 AI伴侣有电脑版的吗?ai2_connect有，但是不好用，不建议使用。参考中文文档：https://www.fun123.cn/reference/creative/connect.html各种连接方式的特点：连接方式测试介质特点AI伴侣Android手机特别适合小朋友...有，但是不好用，...
numpy: most efficient frequency counts for unique values in an array
...ence/generated/numpy.bincount.html
import numpy as np
x = np.array([1,1,1,2,2,2,5,25,1,1])
y = np.bincount(x)
ii = np.nonzero(y)[0]
And then:
zip(ii,y[ii])
# [(1, 5), (2, 3), (5, 1), (25, 1)]
or:
np.vstack((ii,y[ii])).T
# array([[ 1, 5],
[ 2, 3],
[ 5, 1],
[25, ...
dropping infinite values from dataframes in pandas?
... dropna:
df.replace([np.inf, -np.inf], np.nan).dropna(subset=["col1", "col2"], how="all")
For example:
In [11]: df = pd.DataFrame([1, 2, np.inf, -np.inf])
In [12]: df.replace([np.inf, -np.inf], np.nan)
Out[12]:
0
0 1
1 2
2 NaN
3 NaN
The same method would work for a Series.
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