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Python Pandas merge only certain columns
...g from the proposed answer: list('xab') takes each element (letter) of the string 'xab' and converts it to a list element so list('xab') returns ['x', 'a', 'b']. That works if each column has a single letter as a name. In your case I think you need to do df1.merge(df2['Unique_External_Users'], *othe...
Read input from console in Ruby?
... personally like
using the method gets. When you use gets, it gets the string
that you typed, and that includes the ENTER key that you pressed
to end your input.
name = gets
"mukesh\n"
You can see this in irb; type this and you will see the \n, which is the “newline” character ...
Javascript replace with reference to matched group?
I have a string, such as hello _there_ . I'd like to replace the two underscores with <div> and </div> respectively, using JavaScript . The output would (therefore) look like hello <div>there</div> . The string might contain multiple pairs of underscores.
...
Random “Element is no longer attached to the DOM” StaleElementReferenceException
... to use a method like this with some success:
WebElement getStaleElemById(String id) {
try {
return driver.findElement(By.id(id));
} catch (StaleElementReferenceException e) {
System.out.println("Attempting to recover from StaleElementReferenceException ...");
return...
Entity Framework Code First - two Foreign Keys from same table
... this:
public class Team
{
public int TeamId { get; set;}
public string Name { get; set; }
public virtual ICollection<Match> HomeMatches { get; set; }
public virtual ICollection<Match> AwayMatches { get; set; }
}
public class Match
{
public int MatchId { get; set;...
In plain English, what does “git reset” do?
...repository.
But suddenly we came to know while commiting that we have one extra file which we added in index is not required to push in git repository. It means we don't want that file in index.
Now the question is how to remove that file from git index, Since we used git add to put them in the ind...
Why is a round-trip conversion via a string not safe for a double?
...amp;number, &dTest);
if (dTest == value) {
gc.refRetVal = NumberToString(&number, 'G', DOUBLE_PRECISION, gc.numfmt);
goto lExit;
}
DoubleToNumber(value, 17, &number);
DoubleToNumber is pretty simple -- it just calls _ecvt, which is in the C runtime:
void DoubleToNumber(doubl...
How to display the default iOS 6 share action sheet with available share options?
... applicable sharing services. Examples:
Objective-C
- (void)shareText:(NSString *)text andImage:(UIImage *)image andUrl:(URL *)url
{
NSMutableArray *sharingItems = [NSMutableArray new];
if (text) {
[sharingItems addObject:text];
}
if (image) {
[sharingItems addObje...
GROUP BY to combine/concat a column [duplicate]
...ou are using STUFF() to remove the first comma of the concatenated PageUrl string. The PageUrl string itself is created by using FOR XML PATH(), with an empty path, to concatenate the retrieved PageUrls. Pretty clever :) Some sources: STUFF(): msdn.microsoft.com/en-us/library/ms188043.aspx FOR XML: ...
Use of undeclared identifier 'kUTTypeMovie'
...ker.sourceType = .camera
imagePicker.mediaTypes = [kUTTypeMovie as String]
imagePicker.videoMaximumDuration = 10 // or whatever you want
imagePicker.videoQuality = .typeMedium
imagePicker.allowsEditing = false
present(imagePicker, animated: true, completion: n...