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How to retrieve a single file from a specific revision in Git?
I have a Git repository and I'd like to see how some files looked a few months ago. I found the revision at that date; it's 27cf8e84bb88e24ae4b4b3df2b77aab91a3735d8 . I need to see what one file looks like, and also save it as a ("new") file.
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How to parse a JSON string to an array using Jackson
...I finally got it:
ObjectMapper objectMapper = new ObjectMapper();
TypeFactory typeFactory = objectMapper.getTypeFactory();
List<SomeClass> someClassList = objectMapper.readValue(jsonString, typeFactory.constructCollectionType(List.class, SomeClass.class));
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Reload Flask app when template file changes
...running Flask application using the built-in server ( Flask.run ), it monitors its Python files and automatically reloads the app if its code changes:
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Instantiating object of type parameter
...bout T is that it is some subclass of Object. You need to specify some factory to create instances of T.
One approach could use a Supplier<T>:
class MyClass<T> {
private final Supplier<? extends T> ctor;
private T field;
MyClass(Supplier<? extends T> ctor) {
th...
How do Google+ +1 widgets break out of their iframe?
... JavaScript widget is running within the context of your website and therefore is not constrained by the Origin Inheritance Rules for iframes. Therefore this JavaScript widget can set whatever DOM events it wants on the parent site even though it appears to be just a simple iframe.
Another thing,...
How to replace multiple strings in a file using PowerShell
I am writing a script for customising a configuration file. I want to replace multiple instances of strings within this file, and I tried using PowerShell to do the job.
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String length in bytes in JavaScript
In my JavaScript code I need to compose a message to server in this format:
13 Answers
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How to get the current date and time
...guments; this will assign the current date and time to the new object.
import java.util.Date;
Date d = new Date();
In the words of the Javadocs for the zero-argument constructor:
Allocates a Date object and initializes it so that it represents the time at which it was allocated, measured to ...
Inject errors into already validated form?
After my form.Form validates the user input values I pass them to a separate (external) process for further processing. This external process can potentially find further errors in the values.
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How to close current tab in a browser window?
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Note: the current tab is implied. This is equivalent:
window.close();
or you can specify a different window.
So:
function close_window() {
if (confirm("Close Window?")) {
close();
}
}
with HTML:
<a href="javascript:close_window();">close</a>
or:
<a href="#" onclic...