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Split (explode) pandas dataframe string entry to separate rows
...1 var2 var3
0 [a, b, c] 1 XX
1 [d, e, f, x, y] 2 ZZ
Now we can do this:
In [181]: pd.DataFrame({
...: col:np.repeat(x[col].values, x[lst_col].str.len())
...: for col in x.columns.difference([lst_col])
...: }).assign(**{lst_col:np.concatenate(x[lst_col]....
Why are dashes preferred for CSS selectors / HTML attributes?
...elopers avoided it like the plague. Of course, we don't need the backslash nowadays, but the dash-etiquette has already been firmly established.
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Handling an empty UITableView. Print a friendly message
...bleView.emptyDataSetDelegate = self
tableView.tableFooterView = UIView()
Now all you have to do to show the emptystate is:
//Add title for empty dataset
func titleForEmptyDataSet(scrollView: UIScrollView!) -> NSAttributedString! {
let str = "Welcome"
let attrs = [NSFontAttributeName: ...
Has reCaptcha been cracked / hacked / OCR'd / defeated / broken? [closed]
... ones (or at least quickest) broken.
UPDATE: CAPTCHA Killer's website is now taken down, apparently under legal pressure. See http://captcha.org/ for a complete overview of the topic.
And yeah, OCR is not the best way to break a CAPTCHA protected site - there are many other better ways.
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Should I compile release builds with debug info as “full” or “pdb-only”?
...the JIT compiler that debug information is available.
Then, what is true now?
Pdb-only – Prior to .NET 2.0, it helped to investigate the crash dumps from released product (customer machines). But it didn't let attaching the debugger. This is not the case from .NET 2.0. It is exactly same as Fu...
How to plot two histograms together in R?
...rm(100000, 6, 2))
cukes <- data.frame(length = rnorm(50000, 7, 2.5))
# Now, combine your two dataframes into one.
# First make a new column in each that will be
# a variable to identify where they came from later.
carrots$veg <- 'carrot'
cukes$veg <- 'cuke'
# and combine into your new ...
Generating Random Passwords
...
Didn't know that the Framework has such a method! Awesome! Will swap out my current code for this!
– FryHard
Sep 11 '08 at 4:19
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Are there any O(1/n) algorithms?
...ensible when we take the mathematical definition of the Big O notation:
Now you can easily substitute g(x) for 1/x … it's obvious that the above definition still holds for some f.
For the purpose of estimating asymptotic run-time growth, this is less viable … a meaningful algorithm cannot ge...
How many parameters are too many? [closed]
...ndment guarantee to free speech? According to Justice Potter Stewart, "I know it when I see it." The same holds here.
I hate making hard and fast rules like this because the answer changes not only depending on the size and scope of your project, but I think it changes even down to the module lev...
Chrome Dev Tools - Modify javascript and reload
... thank you. I used to use Fiddler for Windows before that extension. Right now I can debug remote files on any platform.
– Ahmad Alfy
Nov 22 '15 at 15:35
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