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What is the most efficient way to create a dictionary of two pandas Dataframe columns?
...taFrame({'Position':[1,2,4,4,4], 'Letter':['a', 'b', 'd', 'e', 'f']})
for idx,row in df.iterrows():
multivalue_dict[row['Position']].append(row['Letter'])
[out]:
>>> print(multivalue_dict)
defaultdict(list, {1: ['a'], 2: ['b'], 4: ['d', 'e', 'f']})
...
How to resize an Image C#
...is essentially just the name of the class, you can save it out as whatever file type you like.
– mpen
Jun 10 '16 at 20:33
6
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Is SQL syntax case sensitive?
...hat insensitivity doesn't work as you'd assume it would do on Linux if the file-system is case-sensitive (default). You have to make a case-insensitive file-system on Linux in order for mysql case-insensitivity to work the same way as on windows (=properly). Especially turning it on/off after some w...
Jackson JSON custom serialization for certain fields
...s IntToStringSerializer extends JsonSerializer<Integer> {
@Override
public void serialize(Integer tmpInt,
JsonGenerator jsonGenerator,
SerializerProvider serializerProvider)
throws IOException, JsonProces...
How to handle the modal closing event in Twitter Bootstrap?
...and 4
Bootstrap 3 and Bootstrap 4 docs refer two events you can use.
hide.bs.modal: This event is fired immediately when the hide instance method has been called.
hidden.bs.modal: This event is fired when the modal has finished being hidden from the user (will wait for CSS transitions to comp...
Preferred method to store PHP arrays (json_encode vs serialize)
I need to store a multi-dimensional associative array of data in a flat file for caching purposes. I might occasionally come across the need to convert it to JSON for use in my web app but the vast majority of the time I will be using the array directly in PHP.
...
How can you find the height of text on an HTML canvas?
...spec has a context.measureText(text) function that will tell you how much width it would require to print that text, but I can't find a way to find out how tall it is. I know it's based on the font, but I don't know to convert a font string to a text height.
...
What is the @Html.DisplayFor syntax for?
...tes, they're partial views that can be put in a DisplayTemplates folder inside the view folder associated to a controller.
Example:
If you create a view named String.cshtml inside the DisplayTemplates folder of your views folder (e.g Home, or Shared) with the following code:
@model string
@if ...
Advantage of switch over if-else statement
...bk1e added the following comment: "Defining constants as enums in a header file is another way to handle this".
Of course it is.
The point of an extern type was to decouple the value from the source. Defining this value as a macro, as a simple const int declaration, or even as an enum has ...
abort, terminate or exit?
...t with an error code if the user gave input that could not be parsed, or a file could not be read. An exit code of 0 indicates success. exit also optionally calls handlers before it ends the program. These are registered with the atexit and on_exit functions.
std::terminate is what is automatically ...