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Determining complexity for recursive functions (Big O notation)
...ant.
5.
T(n) = n / 2 + T(n - 5)
where n is some constant
Rewrite n = 5q + r where q and r are integer and r = 0, 1, 2, 3, 4
T(5q + r) = (5q + r) / 2 + T(5 * (q - 1) + r)
We have q = (n - r) / 5, and since r < 5, we can consider it a constant, so q = O(n)
By induction:
T(n) = T(5q + r)
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Commenting code in Notepad++
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CTRL+Q Block comment/uncomment.
See Keyboard And Mouse Shortcuts - Notepad++ Wiki.
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How to convert an address into a Google Maps Link (NOT MAP)
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How about this?
https://maps.google.com/?q=1200 Pennsylvania Ave SE, Washington, District of Columbia, 20003
https://maps.google.com/?q=term
If you have lat-long then use below URL
https://maps.google.com/?ll=latitude,longitude
Example: maps.google.com/?ll=38....
How to trim leading and trailing white spaces of a string?
...trings"
)
func main() {
s := "\t Hello, World\n "
fmt.Printf("%d %q\n", len(s), s)
t := strings.TrimSpace(s)
fmt.Printf("%d %q\n", len(t), t)
}
Output:
16 "\t Hello, World\n "
12 "Hello, World"
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Code Golf: Lasers
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C89 (209 characters)
#define M(a,b)*p==*#a?m=b,*p=1,q=p:
*q,G[999],*p=G;w;main(m){for(;(*++p=getchar())>0;)M(<,-1)M
(>,1)M(^,-w)M(v,w)!w&*p<11?w=p-G:0;for(;q+=m,m=*q&4?(*q&1?
-1:1)*(m/w?m/w:m*w):*q&9?!puts(*q&1?"false":"true"):m;);}
Explanatio...
Queue.Queue vs. collections.deque
I need a queue which multiple threads can put stuff into, and multiple threads may read from.
7 Answers
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micro:bit 微控制器教程 · App Inventor 2 中文网
... 3. 双向通信
常见问题
Q: 扫描不到 micro:bit 设备？
Q: 连接失败？
Q: 无法接收温度数据？
Q: 控制指令无效？
扩展功能
1. 添加更多传感器
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WakeLock 扩展：保持设备唤醒扩展，防止系统休眠和电池优化 · App Inventor 2 中文网
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应用场景
1. 数据记录应用
2. MQTT 客户端
3. 食谱显示应用
4. 长时间运行的应用
5. 下载管理器
重要说明
权限要求
Companion 限制
电池优...
How to $http Synchronous call with AngularJS
...ing else is actually desired, maybe you should look into promises and the $q service. It allows you to wait until a set of asynchronous actions are done, and then execute something once they're all complete. I don't know what your use case is, but that might be worth a look.
Outside of that, if you...
Smooth GPS data
...ensors to produce a better estimate. The code has a single free parameter Q, expressed in metres per second, which describes how quickly the accuracy decays in the absence of any new location estimates. A higher Q parameter means that the accuracy decays faster. Kalman filters generally work bett...