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The performance impact of using instanceof in Java
...y "slow" operations, including instanceof, exception handling, reflection, etc.
As Donald Knuth wrote, "We should forget about small efficiencies, say about 97% of the time: premature optimization is the root of all evil." The performance of instanceof probably won't be an issue, so don't waste you...
Which is the best library for XML parsing in java [closed]
... JAXP is then implemented by different providers such as: Oracle, Apache, etc.
– bdoughan
Feb 22 '11 at 14:15
Indeed,...
How long do browsers cache HTTP 301s?
...is directed back to a same URL a second time during a redirect, it should fetch it from the origin again instead of redirecting again from cache, in an attempt to avoid a redirect loop. Comments on this answer indicate this now works in all major browsers - but there may be some minor browsers wher...
How to listen for changes to a MongoDB collection?
...? don't use polling - you need an evented approach instead of while loops, etc.
– Alexander Mills
Mar 17 '18 at 4:17
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How to call C from Swift?
...s C libraries. Here is explained how.
Basically, the C types, C pointers, etc are translated into Swift objects, for example a C int in Swift is a CInt.
I've build a tiny example, for another question, which can be used as a little explanation, on how to bridge between C and Swift:
main.swift
im...
How do you get the index of the current iteration of a foreach loop?
...aordinary confusion", "completely wrong and confused", "I got 37 upvotes", etc. (I think your ego is a bit on the line here.) Instead, I'd like to politely ask that you not browbeat others with your 'argumentum ad verecundiam' and I'd like to instead encourage you to think of ways to support people ...
How to use the CSV MIME-type?
... a .csv file, so the user can directly open it with calc, excel, gnumeric, etc.
4 Answers
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Rails extending ActiveRecord::Base
...grouping. For example, a domain grouping is like 'Commentable', 'Taggable' etc. A technical based grouping will be like 'FinderMethods', 'ValidationMethods'.
Here is a link to a post that I found very useful for understanding concerns in Models.
Hope the writeup helps :)
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How to compare objects by multiple fields
...a itself - i.e. sometimes you want to compare by name, other times by age, etc. To compare by multiple fields at the same time, only one comparator would be necessary.
– Elie
Nov 13 '14 at 17:13
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When using the Java debugger in Intellij what does “Drop Frame” mean?
... have occurred - e. g. network traffic, file manipulations, console output etc. - cannot be rewound.
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