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Understanding Canvas and Surface concepts
...s of drawing to SurfaceView and therefore the whole Surface / Canvas / Bitmap system, which is used in Android.
3 Answe...
Iterate through object properties
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Iterating over properties requires this additional hasOwnProperty check:
for (var prop in obj) {
if (Object.prototype.hasOwnProperty.call(obj, prop)) {
// do stuff
}
}
It's necessary because an object's pr...
How to export data as CSV format from SQL Server using sqlcmd?
I can quite easily dump data into a text file such as:
11 Answers
11
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Do I need to disable NSLog before release Application?
When releasing an app for iPhone, if I disable NSLog(); will it perform better?
12 Answers
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Why are dates calculated from January 1st, 1970?
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It is the standard of Unix time.
Unix time, or POSIX time, is a system for describing points in time, defined as the number of seconds elapsed since midnight proleptic Coordinated Universal Time (UTC) of January 1, 1970, ...
Join vs. sub-query
...ed JOIN over sub-query. But nowadays everyone uses sub-query, and I hate it; I don't know why.
19 Answers
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django - why is the request.POST object immutable?
As the title asks, why did the Django guys decide to implement the request.POST object with a querydict (which, of course, in turn, makes the whole thing immutable?)
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Ruby - test for array
...follow
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edited Mar 30 at 18:35
siery
17311 silver badge1212 bronze badges
answered Oct 6...
Cartesian product of multiple arrays in JavaScript
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2020 Update: 1-line (!) answer with vanilla JS
Original 2017 Answer: 2-line answer with vanilla JS:
(see updates below)
All of the answers here are overly complicated, most of them take 20 lines of code or even more.
This example uses just two lines of vani...
Behaviour of increment and decrement operators in Python
...ncrement/decrement operator can be applied on a variable (like ++count ). It compiles, but it does not actually change the value of the variable!
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