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When do you use map vs flatMap in RxJava?
...onError handler for you.
Observable.from(jsonFile).map(new Func1<File, String>() {
@Override public String call(File file) {
try {
return new Gson().toJson(new FileReader(file), Object.class);
} catch (FileNotFoundException e) {
// this exception is...
How to parse JSON in Python?
...on out of. For the purposes of this, let's set it to some simple JSON in a string:
5 Answers
...
Computed / calculated / virtual / derived columns in PostgreSQL
...l, but makes makes life a bit easier).
Suppose my computation is md5(some_string_field), then I create the index as:
CREATE INDEX some_string_field_md5_index ON some_table(MD5(some_string_field));
Now, any queries that act on MD5(some_string_field) will use the index rather than computing it fr...
Is there any kind of hash code function in JavaScript?
...
JavaScript objects can only use strings as keys (anything else is converted to a string).
You could, alternatively, maintain an array which indexes the objects in question, and use its index string as a reference to the object. Something like this:
var Ob...
How to copy to clipboard in Vim?
... As an addendum to your note - you may also have to install extra packages to get this to work. If your vim lacks the +xterm_clipboard feature (visible when you run vim --version). This was the case for me (running Kubuntu 12.10). I had to install the vim-gui-common package to get the...
Git pre-push hooks
...th pre-commit hooks. Apart from protecting a branch, they can also provide extra security combined with pre-commit hooks.
And for an example on how to use (taken and adopted and enhanced from this nice entry)
Simple example to login to vagrant, run tests and then push
#!/bin/bash
# Run the follo...
When use getOne and findOne methods Spring Data JPA
...));
}
LockModeType type = metadata.getLockModeType();
Map<String, Object> hints = getQueryHints().withFetchGraphs(em).asMap();
return Optional.ofNullable(type == null ? em.find(domainType, id, hints) : em.find(domainType, id, type, hints));
}
And here em.find() is an Entit...
Skip callbacks on Factory Girl and Rspec
... create users without the callback by default because the methods used run extra stuff I don't normally want in my test examples.
----------UPDATE------------
I stopped using skip_callback because there were some inconsistency issues in the test suite.
Alternative Solution 1 (use of stub and unstu...
difference between fork and branch on github
... it to my PC effectively), al the branches are on my PC? But in one branch extra files have been added. So will my PC have those files or not?
– Jonathan.
Feb 15 '11 at 21:25
1
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Inline SVG in CSS
... and if it doesn't work (it might complain about invalid characters in the string), you can simply use https://www.base64encode.org/.
Example to set a div background:
var mySVG = "<svg xmlns='http://www.w3.org/2000/svg' width='10' height='10'><linearGradient id='gradient'><stop ...