大约有 40,000 项符合查询结果（耗时：0.0447秒） [XML]
How do I determine k when using k-means clustering?
...X | C) - (p / 2) * log n
where L(X | C) is the log-likelihood of the dataset X according to model C, p is the number of parameters in the model C, and n is the number of points in the dataset.
See "X-means: extending K-means with efficient estimation of the number of clusters" by Dan Pelleg and An...
extract part of a string using bash/cut/split
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Git, see a list of comments of my last N commits
...t I have for zsh)
alias glog="git log --graph --pretty=format:'%Cred%h%Creset -%C(yellow)%d%Creset %s %Cgreen(%cr) %C(bold blue)<%an>%Creset' --abbrev-commit"
Now, I can just use:
glog -n 5
And I get a nice output such as:
Which is colourised, shows the name of the author and also sho...
Programmatically access currency exchange rates [closed]
I'm setting up an online ordering system but I'm in Australia and for international customers I'd like to show prices in US dollars or Euros so they don't have to make the mental effort to convert from Australian dollars.
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How does Duff's device work?
...f the program for the first pass is:
int count; // Set to 20
{
int n = (count + 7) / 8; // n is now 3. (The "while" is going
// to be run three times.)
switch (count % 8) { // The remainder is 4 (20 modulo...
How to get git diff with full context?
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How do I replace text in a selection?
I've just started using Sublime Text 2, coming from emacs.
11 Answers
11
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Vertically align text to top within a UILabel
...
There's no way to set the vertical-align on a UILabel, but you can get the same effect by changing the label's frame. I've made my labels orange so you can see clearly what's happening.
Here's the quick and easy way to do this:
[myLabel ...
Easily measure elapsed time
I am trying to use time() to measure various points of my program.
26 Answers
26
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Mythical man month 10 lines per developer day - how close on large projects? [closed]
...rybody always says that they can beat the "10 lines per developer per day" from the "Mythical Man Month", and starting a project, I can usually get a couple hundred lines in in a day.
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