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How to convert ActiveRecord results into an array of hashes
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212
as_json
You should use as_json method which converts ActiveRecord objects to Ruby Hashes despi...
Can clearInterval() be called inside setInterval()?
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1 Answer
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Make a negative number positive
...ers. However, I want any negatives numbers to be treated as positives. So (1)+(2)+(1)+(-1) should equal 5.
21 Answers
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Remove data.frame row names when using xtable
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1 Answer
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Round to 5 (or other number) in Python
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16 Answers
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Use a URL to link to a Google map with a marker on it
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91
In May 2017 Google launched the official Google Maps URLs documentation. The Google Maps URLs in...
Maven: how to do parallel builds?
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Maven 3 (as of beta 1) now supports parallel builds as an experimental feature.
For example,
mvn -T 4 clean install # Builds with 4 threads
mvn -T 1C clean install # 1 thread per cpu core
mvn -T 1.5C clean install # 1.5 thread per cpu core
Full...
TCPClient TCP客户端扩展：连接TCP服务器进行文本消息通信 · App Inventor 2 中文网
...本消息传输
支持多种字符编码（US-ASCII、UTF-8、ISO-8859-1、UTF-16等）
支持行分隔符配置
提供连接状态监控
支持多屏幕共享客户端（SharedTcpClient）
包含的组件
组件
说明
Urs...
How do I catch a numpy warning like it's an exception (not just for testing)?
... for numpy.seterr:
>>> import numpy as np
>>> np.array([1])/0 #'warn' mode
__main__:1: RuntimeWarning: divide by zero encountered in divide
array([0])
>>> np.seterr(all='print')
{'over': 'warn', 'divide': 'warn', 'invalid': 'warn', 'under': 'ignore'}
>>> np.arr...