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How much of a git sha is *generally* considered necessary to uniquely identify a change in a given c
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The default of 7 comes from fairly early in git development, when seven hex digits was a lot (it covers about 250+ million hash values).
Back then I thought that 65k revisions was a lot (it was what we were about to hit in BK), and each revision tends to be about 5-10 new objects or so, so a mi...
Safe integer parsing in Ruby
...ngs that are valid non-decimal numbers, such as those starting with 0x for hex and 0b for binary, and potentially more tricky numbers starting with zero that will be parsed as octal.
Ruby 1.9.2 added optional second argument for radix so above issue can be avoided:
Integer('23') ...
App Inventor 2 计步传感器与距离测量教程 · App Inventor 2 中文网
...d手机内置硬件计步器传感器（TYPE_STEP_COUNTER），精度高且功耗低。
使用扩展
需要计步器扩展（如StepCounter扩展）。
when Screen1.Initialize() {
var 今日步数 = 微数据库1.GetValue("today_steps", 0)
var 今日日期 = 计时器1....
How to set background color of a View
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You can set the hex-color to any resource with:
View.setBackgroundColor(Color.parseColor("#e7eecc"));
share
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improve this answer
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Python str vs unicode types
...that Unicode code points are usually formatted with a leading U+, then the hexadecimal numeric value padded to at least 4 digits. So, the above examples would be U+0041, U+00E1, U+0414, U+2192, U+1F602.
Unicode code points range from U+0000 to U+10FFFF. That is 1,114,112 numbers. 2048 of these numb...
组件使用指导 · App Inventor 2 中文网
...float 互转、状态位、与网络调试助手联调的完整案例
低功耗蓝牙（BluetoothLowEnergy）：内置版接入步骤、连接收发案例与参数边界
下载器（Downloader）：下载器：下载网上的文件并保存到手机，可同时下载多个，报告下载进度...
Android Replace “…” with ellipsis character
...… but your link does answer that. Namely that the x signifies a hex value and 8230 in decimal is 2026 in hex.
– k2col
May 27 '14 at 21:44
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Memory address of variables in Java
...ects, offset) & 0xFFFFFFFFL) * factor;
System.out.print(Long.toHexString(i1));
last = i1;
for (int i = 1; i < objects.length; i++) {
final long i2 = (unsafe.getInt(objects, offset + i * 4) & 0xFFFFFFFFL) * factor;
if (i2 > last)
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Sending a JSON to server and retrieving a JSON in return, without JQuery
... answered Jun 28 '14 at 16:22
hex494D49hex494D49
7,72433 gold badges3333 silver badges4242 bronze badges
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BLE协议—广播和扫描 - 创客硬件开发 - 清泛IT社区，为创新赋能！
...户可以直接用扫描和广播进行数据的传输（数据量不大，功耗要求较高的情况下），也可以在广播和扫描的基础上进行连接后点对点通信。广播访问地址广播包：广播包Access Address 固定为0x8E89BED6，广播包只能在广播信道（channel...