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Can't find @Nullable inside javax.annotation.*
...oupId>com.google.code.findbugs</groupId>
<artifactId>jsr305</artifactId>
<version>3.0.2</version>
</dependency>
and for Gradle:
dependencies {
testImplementation 'com.google.code.findbugs:jsr305:3.0.2'
}
...
【Mixly×AI2系列·第5讲】手机发指令控制LED/舵机：蓝牙双向通信实战① - ...
【系列教程·第5讲】手机发指令控制 LED/舵机：Mixly × App Inventor2 双向通信实战①
本讲是《米思齐(Mixly) × App Inventor2 接入系列》第 5 讲，完整版方案可参考同版块的系列开篇调研帖。
一、知识目标
• 理解"App → 蓝牙 ...
Converting datetime.date to UTC timestamp in Python
...t totimestamp(now)
Beware of floating-point issues.
Output
2012-01-08 15:34:10.022403
1326036850.02
How to convert an aware datetime object to POSIX timestamp
assert dt.tzinfo is not None and dt.utcoffset() is not None
timestamp = dt.timestamp() # Python 3.3+
On Python 3:
from datetime imp...
Moment.js - how do I get the number of years since a date, not rounded up?
...te is 02/26/1978, moment("02/26/1978", "MM/DD/YYYY").fromNow() returns '35 years ago'. How can I make Moment.js ignore the number of months, and simply return the number of years (i.e. 34) since the date?
...
When do you use varargs in Java?
...
152
Varargs are useful for any method that needs to deal with an indeterminate number of objects. ...
How to determine the current shell I'm working on
...pecially if that ID is a small number (for example, if the shell's PID is "5", you may find processes called "java5" or "perl5" in the same grep output!). This is the second problem with the "ps" approach, on top of not being able to rely on the shell name.
echo $SHELL - The path to the current shel...
Best way to clear a PHP array's values
...
259
Like Zack said in the comments below you are able to simply re-instantiate it using
$foo = ar...
When to use enumerateObjectsUsingBlock vs. for
...
350
Ultimately, use whichever pattern you want to use and comes more naturally in the context.
Whi...
Adding a new SQL column with a default value
...
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edited Aug 25 '10 at 19:18
answered Aug 25 '10 at 19:11
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Add a CSS border on hover without moving the element [duplicate]
...dofaction
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