大约有 41,000 项符合查询结果（耗时：0.0496秒） [XML]
Determining complexity for recursive functions (Big O notation)
...ften Big O notation and complexity analysis uses base 2.
void recursiveFun4(int n, int m, int o)
{
if (n <= 0)
{
printf("%d, %d\n",m, o);
}
else
{
recursiveFun4(n-1, m+1, o);
recursiveFun4(n-1, m, o+1);
}
}
Here, it's O(2^n), or exponential, since...
What is the difference between substr and substring?
...
answered Sep 19 '10 at 11:41
Delan AzabaniDelan Azabani
70.4k2222 gold badges154154 silver badges189189 bronze badges
...
Short description of the scoping rules?
...
426
Actually, a concise rule for Python Scope resolution, from Learning Python, 3rd. Ed.. (These r...
What is the string length of a GUID?
...
Guid.NewGuid().ToString() => 36 characters (Hyphenated)
outputs: 12345678-1234-1234-1234-123456789abc
Guid.NewGuid().ToString("D") => 36 characters (Hyphenated, same as ToString())
outputs: 12345678-1234-1234-1234-123456789abc
Guid.NewGuid().ToString("N") => 32 characters (Digits only)
...
How to get cumulative sum
...| 1 | 10 | 10 |
| 2 | 12 | 22 |
| 3 | 3 | 25 |
| 4 | 15 | 40 |
| 5 | 23 | 63 |
Edit: this is a generalized solution that will work across most db platforms. When there is a better solution available for your specific platform (e.g., gareth's), use it!
...
Cluster analysis in R: determine the optimal number of clusters
...
1024
If your question is how can I determine how many clusters are appropriate for a kmeans analysis ...
Difference between method and function in Scala
...
240
Jim has got this pretty much covered in his blog post, but I'm posting a briefing here for refe...
How to grant remote access permissions to mysql server for user?
...
143
This grants root access with the same password from any machine in *.example.com:
GRANT ALL PR...
How to Sign an Already Compiled Apk
...-keystore my-release-key.keystore -alias alias_name -keyalg RSA -keysize 2048 -validity 10000
then sign the apk using :
jarsigner -verbose -sigalg SHA1withRSA -digestalg SHA1 -keystore my-release-key.keystore my_application.apk alias_name
check here for more info
...