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Why are quaternions used for rotations?
...ization. Expressing this with a matrix requires evaluation of sin and cos, then building a rotation matrix. Then multiplying a vector with a quaternion is still cheaper as going through a full vector-matrix multiplication, it is also still cheaper if one adds a translation afterwards. If you conside...
Java rounding up to an int using Math.ceil
...) ? 0 : 1);
You do a / b with always floor if a and b are both integers. Then you have an inline if-statement witch checks whether or not you should ceil instead of floor. So +1 or +0, if there is a remainder with the division you need +1. a % b == 0 checks for the remainder.
##Option 2
This optio...
When is “Try” supposed to be used in C# method names?
...thing that could easily fail and that failure is not particularly notable, then using this pattern is more idiomatic than a try/catch
– Adam Robinson
Jun 20 '13 at 12:06
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Activity has leaked window that was originally added
...ption was thrown in an AsyncTask, which caused the
Activity to shutdown, then an open progressdialog caused this
Exception.. so the 'real' exception was a little earlier in the log
Answer 3
Call dismiss() on the Dialog instance you created before exiting your
Activity, e.g. in onPause(...
Pretty-Printing JSON with PHP
... another script. My script builds data into a large associative array, and then outputs the data using json_encode . Here is an example script:
...
How can I escape a double quote inside double quotes?
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Not working. x=ls; if [ -f "$(which "\""$x"\"")" ]; then echo exists; else echo broken; fi; gives broken whereas ... [ -f "$(which $x)" ]; ... or ... [ -f $(which "$x") ]; ... work just fine. Issues would arise when either $x or the result of $(which "$x") gives anything with ...
&& (AND) and || (OR) in IF statements
...sEmpty()) becomes: (str !(!=) null !(&&) !(!)str.isEmpty()) and then: (str == null || str.isEmpty()) because: !(!=) is == !(&&) is || !(!) eliminates itself other helpful negations are: !(<) is >= !(>) is <= and viceversa
– egallardo
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Does anyone still use [goto] in C# and if so why? [closed]
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@Jesus but then with goto, you can go anywhere. Labeled break ensures you are going just outside the loop.
– mihsathe
Jul 1 '11 at 9:03
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Browser doesn't scale below 400px?
...stuck there and in FF as I scale down it it just stops at around 400px and then pops a horizontal scroll bar.
17 Answers
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How to prevent ENTER keypress to submit a web form?
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e should be an argument and then you should check for the window.event. Also, you should be getting the keycode from the event. Finally, you should return false.
– ntownsend
Jan 20 '10 at 21:10
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