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Insert a row to pandas dataframe
... its incredible that a simple insert new row function isn't built in. i've read a lot about appending a new df to the original, but i'm wondering if this would be faster.
df.loc[0] = [row1data, blah...]
i = len(df) + 1
df.loc[i] = [row2data, blah...]
...
How to save CSS changes of Styles panel of Chrome Developer Tools?
...your changes to.
At the top of your viewport, click Allow to give DevTools read and write access to the directory.
Make your changes. In the GIF below, you can see that the background:rosybrown change persists across page loads.
How overrides work
When you make a change in DevTools, DevTools sa...
How to parse XML to R data frame
...akes it easier to ensure everything is lined up:
library(xml2)
data <- read_xml("http://forecast.weather.gov/MapClick.php?lat=29.803&lon=-82.411&FcstType=digitalDWML")
# Point locations
point <- data %>% xml_find_all("//point")
point %>% xml_attr("latitude") %>% as.numeric()...
Close and Dispose - which to call?
Having read the threads Is SqlCommand.Dispose enough? and Closing and Disposing a WCF Service I am wondering for classes such as SqlConnection or one of the several classes inheriting from the Stream class does it matter if I close Dispose rather than Close?
...
How do I use $scope.$watch and $scope.$apply in AngularJS?
... team gave us two ways of declaring some $scope variable as being watched (read below).
$watch helps to listen for $scope changes
There are two ways of declaring a $scope variable as being watched.
By using it in your template via the expression <span>{{myVar}}</span>
By adding it ma...
How to get current timestamp in string format in Java? “yyyy.MM.dd.HH.mm.ss”
...des are similar to those of java.text.SimpleDateFormat but not exactly, so read the doc carefully.
DateTimeFormatter formatter = DateTimeFormatter.ofPattern( "uuuu.MM.dd.HH.mm.ss" );
String output = zdt.format( formatter );
This particular format is ambiguous as to its exact meaning as it lacks any...
PostgreSQL naming conventions
...
@user1334007 The convention is not ugly - and read Craig's comment above. And there's no need to quote if you didn't quote when you created the tables (that is, if you are consistent).
– leonbloy
Jan 30 '16 at 1:41
...
How to branch with TortoiseHG
...r to anybody who came along to look at that link that you've really got to read between the lines in the docs to get the answer since it isn't explicitly mentioned.
– Michael Tiller
Apr 1 '10 at 20:12
...
When to use enumerateObjectsUsingBlock vs. for
...
@VanDuTran Blocks are only executed on a separate thread if you tell them to be executed on a separate thread. Unless you use the concurrency option of enumeration, then it'll be executed on the same thread as the call was made
– bbum
J...
Java Synchronized Block for .class
...ass instance (the object representing the class metadata at runtime) one thread can be in this block.
With synchronized(this) the block is guarded by the instance. For every instance only one thread may enter the block.
synchronized(X.class) is used to make sure that there is exactly one Thread i...