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App Inventor 2 BLE扩展源码分析 - WriteBytes vs WriteStrings 23字节硬编...
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- BluetoothLE.java（2975行）-- 公开API层
- BluetoothLEint.java（3165行）-- 内部实现层
二、核心发现：23字节硬编码限制
2.1 WriteStrings 的写入路径
位于 BLEWriteOperation.write() 方法第678-690行：
if (mClass == String.class) {
byte[]...
When to use virtual destructors?
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erdostamasa
38111 silver badge1010 bronze badges
answered Apr 9 '13 at 13:39
Tunvir Rahman TusherTunvir Rahman Tusher
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Cast List to List
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– Robert Noack
Dec 19 '14 at 22:01
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@RobertNoack: What do you mean by "the object reference"...
Calling virtual functions inside constructors
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10
−1 "is dangerous", no, it's dangerous in Java, where downcalls can happen; the C++ rules remove the danger through a pretty expensive mec...
Creating a BLOB from a Base64 string in JavaScript
...n server, when users were using Chrome or IE to download files larger than 100mb. We found that the in IE following line was raising memory exception "var byteNumbers = new Array(slice.length)". However in chrome, it was the for loop causing same issue. We couldn't find a proper resolution to this i...
Commands executed from vim are not recognizing bash command aliases
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answered Jan 10 '11 at 0:48
Josh LeeJosh Lee
141k3030 gold badges245245 silver badges258258 bronze badges
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Matplotlib discrete colorbar
....random.rand(20) # define the data
tag = np.random.randint(0, 20, 20)
tag[10:12] = 0 # make sure there are some 0 values to show up as grey
cmap = plt.cm.jet # define the colormap
# extract all colors from the .jet map
cmaplist = [cmap(i) for i in range(cmap.N)]
# force the first color entry to ...
SQLite - UPSERT *not* INSERT or REPLACE
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edited Dec 18 '19 at 10:44
Arsen Khachaturyan
5,90933 gold badges3232 silver badges3434 bronze badges
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Using a dispatch_once singleton model in Swift
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Alexander Vasenin
10.8k33 gold badges3737 silver badges6262 bronze badges
answered Jun 10 '14 at 17:57
hpiquehpique
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How does Google's Page Speed lossless image compression work?
...with these options:
WebpConfiguration()
: lossless(true), quality(100), method(3), target_size(0),
alpha_compression(0), alpha_filtering(1), alpha_quality(100) {}
There is also image_converter.cc which is used to losslessly convert to the smallest format.
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