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When do you use map vs flatMap in RxJava?
...
map transform one event to another.
flatMap transform one event to zero or more event. (this is taken from IntroToRx)
As you want to transform your json to an object, using map should be enough.
Dealing with the FileNotFoundExceptio...
How to concatenate columns in a Postgres SELECT?
...o long as at least one input is of a string type, as shown in
Table 9.8. For other cases, insert an explicit coercion to text [...]
Bold emphasis mine. The 2nd example (select a||', '||b from foo) works for any data types since the untyped string literal ', ' defaults to type text making the wh...
Finding diff between current and last version
...e previous commit can be accessed with HEAD^, I think that you are looking for something like:
git diff HEAD^ HEAD
As of Git 1.8.5, @ is an alias for HEAD, so you can use:
git diff @~..@
The following will also work:
git show
If you want to know the diff between head and any commit you can ...
What are the differences between vector and list data types in R?
...dvantages" of different data structures is a sufficiently focused question for SO. To add to what Tommy said, besides lists being capable of holding an arbitrary number of other vectors there is the availability of dataframes which are a particular type of list that has a dimensional attribute which...
Calling JavaScript Function From CodeBehind
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I would go for the ScriptManager.RegisterStartupScript(Page, typeof(Page), "somekey", script, true); approach. It works during partial postbacks as well.
– rdmptn
Apr 19 '13 at 12:27
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Removing index column in pandas when reading a csv
...dex with simple sequential numbers, use df.reset_index().
To get a sense for why the index is there and how it is used, see e.g. 10 minutes to Pandas.
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What are the implications of using “!important” in CSS? [duplicate]
I've been working on a website for a few months, and a lot of times when I've been trying to edit something, I have to use !important , for example :
...
How to export all data from table to an insertable sql format?
...e scripts options is at the top level of the context menu Thanks to Daniel for the comment to update.
Select generate scripts
Click next
Choose tables
Click next
Click advanced
Scroll to Types of data to script - Called types of data to script in SMSS 2014 Thanks to Ellesedil for commenting
Select d...
How do I disable the resizable property of a textarea?
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The following CSS rule disables resizing behavior for textarea elements:
textarea {
resize: none;
}
To disable it for some (but not all) textareas, there are a couple of options.
To disable a specific textarea with the name attribute set to foo (i.e., <textarea name...
How to reformat JSON in Notepad++?
...o install JSTool per this answer
INSTALL
Download it from http://sourceforge.net/projects/jsminnpp/ and copy JSMinNpp.dll to plugin directory of Notepad++. Or you can just install "JSTool" from Plugin Manager in Notepad++.
New Notepad++ install and where did PluginManager go? See How to view Pl...