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How to add an extra column to a NumPy array
...np.random.rand(N,N)
b = np.zeros((N,N+1))
b[:,:-1] = a
And timings:
In [23]: N = 10
In [24]: a = np.random.rand(N,N)
In [25]: %timeit b = np.hstack((a,np.zeros((a.shape[0],1))))
10000 loops, best of 3: 19.6 us per loop
In [27]: %timeit b = np.zeros((a.shape[0],a.shape[1]+1)); b[:,:-1] = a
1000...
How to convert a Binary String to a base 10 integer in Java
...
271
You need to specify the radix. There's an overload of Integer#parseInt() which allows you to.
...
Numpy first occurrence of value greater than existing value
...
207
This is a little faster (and looks nicer)
np.argmax(aa>5)
Since argmax will stop at the ...
HSL to RGB color conversion
...m, but is archived here and the original author has a gist - thanks to user2441511).
The code is re-posted below:
HSL to RGB:
/**
* Converts an HSL color value to RGB. Conversion formula
* adapted from http://en.wikipedia.org/wiki/HSL_color_space.
* Assumes h, s, and l are contained in the se...
How can I profile C++ code running on Linux?
... stack. If there is some code that is wasting some percentage of the time, 20% or 50% or whatever, that is the probability that you will catch it in the act on each sample. So, that is roughly the percentage of samples on which you will see it. There is no educated guesswork required. If you do have...
Using Python String Formatting with Lists
I construct a string s in Python 2.6.5 which will have a varying number of %s tokens, which match the number of entries in list x . I need to write out a formatted string. The following doesn't work, but indicates what I'm trying to do. In this example, there are three %s tokens and the list ...
2024 全“心”出发 -- 全新App Inventor 2 移动社区开启新征程 - App Inven...
全新的App Inventor 2 移动技术社区全面改版，全新上线，邀您体验！
感谢您对我们的支持！正是因为您的支持和信任，我们才能不断前行，不断改进。我们承诺，无论是技术问题还是社区建设，我们始终保持诚恳、负责的态度，...
App Inventor 2 实现导出Excel全方案总结 · App Inventor 2 中文网
...生成 App 鸿蒙 · 一套积木，多端原生打包！ 下载 AI2伴侣 · 安卓/鸿蒙/iOS aia 源码商店 中文社区 中文教育版 各版本对比 关于 关于我们 发布日志 服务条款 ...
App Inventor 2 MultiImagePicker 拓展：实现图片/视频多选功能 - App Inve...
App Inventor 2 MultiImagePicker 拓展：实现图片/视频多选功能
App Inventor 2 原生提供的 ImagePicker（图像选择器）组件只能一次选择一张图片，在实际开发中经常需要一次选取多张图片（比如发帖、上传相册等场景）。MultiImagePicker 拓展...
App Inventor 2连接模拟器一直失败的问题 · App Inventor 2 中文网
...生成 App 鸿蒙 · 一套积木，多端原生打包！ 下载 AI2伴侣 · 安卓/鸿蒙/iOS aia 源码商店 中文社区 中文教育版 各版本对比 关于 关于我们 发布日志 服务条款 ...