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App Inventor 2 低功耗蓝牙 BlueToothLE 拓展 · App Inventor 2 中文网
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最新版拓展下载：
edu.mit.appinventor.ble-20230728.aix
低功耗蓝牙，也称为蓝牙LE 或简称 BLE，是一种类似于经典蓝牙的新通信协议，不同之处在于它旨在消耗更少的功耗和成本，同时保持同等的功能。
因此，低功耗蓝牙...
LinkedIn联合创始人：初创企业早期别花钱买用户 - 资讯 - 清泛网 - 专注C/C...
...但是由于无法衡量效果，我们停止了这一举动。于是我们把“增长黑客”的观念设计进产品中，比如最初的“你可能认识的人”功能。
Q:LinkedIn如何实现了今天的商业模式？
A:从公司创建以来，我们就确定了公司的商业模式：...
Find the similarity metric between two strings
... + ' ' * (len(w1) - len(w2))
return sum(1 if i == j else 0 for i, j in zip(w1, w2)) / float(len(w1))
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Eclipse error: “The import XXX cannot be resolved”
...s the hibernate3.jar. I don't know why it was not well extracted from the .zip, maybe corrupt. A good way to check if jars are corrupt or not is navigating through their tree structure in "Project Explorer" in Eclipse: if you can't expand a jar node probably it's corrupt. I've seen that having corru...
程序员之网络安全系列（三）：数据加密之对称加密算法 - 更多技术 - 清泛网...
...密。
加密技术 是最常用的安全保密手段，利用技术手段把重要的数据变为乱码（加密）传送，到达目的地后再用相同或不同的手段还原（解密）。 加密包括两个元素：算法和密钥。一个加密算法是将普通的文本（或者可以理...
The project cannot be built until the build path errors are resolved.
...nd the information:
http://crunchify.com/cannot-be-read-or-is-not-a-valid-zip-file-how-to-fix-maven-build-path-error-with-corrupted-jar-file/
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Split list into smaller lists (split in half)
...this function in a loop, and the lengths vary. In other words: for i,j in zip(list,lengths): print(split(i,j)). The list and lengths lists have the same length. j is alternating: 5,4,5,4,5, and the split function works on the first two alternations, ie it splits the first i of list by 5 and 4, BU...
Python glob multiple filetypes
...3', 'flac', 'wma']
chars = ''.join('[{}]'.format(''.join(set(c))) for c in zip(*exts))
mask = mask_base + chars + ('*' if len(set(len(e) for e in exts)) > 1 else '')
print(mask) # music/*/*.[fmw][plm][3a]*
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month name to month number and vice versa in python
... you can do the same thing this way: month_cal = dict((v,k) for v,k in zip(calendar.month_abbr[1:], range(1, 13))), and then month_cal[shortMonth]
– Matt W.
Jul 12 '18 at 17:29
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Eclipse compilation error: The hierarchy of the type 'Class name' is inconsistent
... Archive for required library in project cannot be read or is not a valid ZIP file
So instead I added them as "External Jars". That helped and all compilation problems were no more!
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