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How to iterate over a JavaScript object?
...operty when iterating on keys if you're using a simple object (for example one you made yourself with {}).
This MDN documentation explains more generally how to deal with objects and their properties.
If you want to do it "in chunks", the best is to extract the keys in an array. As the order isn't...
How can I combine two commits into one commit? [duplicate]
...ards, it makes no sense to think of squashing an older commit into a newer one, but if you could it would be the same operation.
– user229044♦
Jul 30 '18 at 3:47
...
Maximum number of characters using keystrokes A, Ctrl+A, Ctrl+C and Ctrl+V
...he complexity might appear to be O(N), but since the numbers grow at an exponential rate it is actually O(N2) due to the complexity of multiplying the large numbers. Below is a Python implementation. It takes about 0.5 seconds to calculate for N=50,000.
def max_chars(n):
dp = [0] * (n+1)
for i ...
What is the difference between ApplicationContext and WebApplicationContext in Spring MVC?
...he corresponding servlets to avoid name clashes between beans. For example one servlet context will be serving the web pages and another will be implementing a stateless web service.
This two level separation comes out of the box when you use the spring servlet classes: to configure the root applic...
Explain how finding cycle start node in cycle linked list work?
...nked list while keeping the hare at meeting place, followed by moving both one step at a time make them meet at starting point of cycle?
...
Using a strategy pattern and a command pattern
... without having to hard-code its details. It allows messages to be invoked one or more times, or passed along to different parts of the system or multiple systems without requiring the details of a specific invocation to be known before execution.
As is typical for design patterns, they do not req...
Bootstrap Modal immediately disappearing
...he modal code could be loaded from a number a sources. Some of the common ones are:
bootstrap.js (the full BootStrap JS suite)
bootstrap.min.js (same as above, just minified)
bootstrap-modal.js (the standalone plugin)
a dependency loader, e.g., require('bootstrap')
Debugging Tips
A good place ...
Are there any cases when it's preferable to use a plain old Thread object instead of one of the newe
... when it's necessary or useful to use a plain old Thread object instead of one of the above constructs?
Sure. In precisely those cases where one of the higher-level constructs does not meet your needs.
My advice is that if you find yourself in a situation where existing higher-abstraction tools ...
Ball to Ball Collision - Detection and Handling
... elastic collision between the balls, you only need to worry about the component of the velocity that is in the direction of the collision. The other component (tangent to the collision) will stay the same for both balls. You can get the collision components by creating a unit vector pointing in the...
Why is it not possible to extend annotations in Java?
...Q, where it says:
Why don’t you support annotation subtyping (where one annotation type extends another)?
It complicates the annotation type
system, and makes it much more
difficult to write “Specific Tools”.
…
“Specific Tools” — Programs that query
known anno...