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How to concatenate twice with the C preprocessor and expand a macro as in “arg ## _ ## MACRO”?
...then substituted into the replacement string:
EVALUATOR(mine, VARIABLE)
Now the macro EVALUATOR is discovered, and the arguments are isolated as 'mine' and 'VARIABLE'; the latter is then fully expanded to '3', and substituted into the replacement string:
PASTER(mine, 3)
The operation of this i...
How do I find Waldo with Mathematica?
...readers, and strokeless handwriting recognition work today. Basically you know the answer is there, you know more or less what it should look like, and everything else may have common elements, but is definitely "not it", so you don't bother with the "not it"s, you just look of the likelihood of "it...
What is normalized UTF-8 all about?
The ICU project (which also now has a PHP library ) contains the classes needed to help normalize UTF-8 strings to make it easier to compare values when searching.
...
What is Java Servlet?
... (e.g. parsing an HTTP request, connection handling etc). One of the best-known open source servlet containers is Tomcat.
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Should I use a data.frame or a matrix?
...ize. To adapt the new version of the function to ggplot(), I converted the now returned matrix to a data.frame to use in ggplot().
After I rerun the code I could not believe the result. The code run in a fraction of a second! Instead of about 12 seconds. And again, the function during the 10,000 i...
How to read a single char from the console in Java (as the user types it)?
...ter key required.) On UNIX systems, the 'stty' command can change modes.
Now, with respect to Java... see Non blocking console input in Python and Java. Excerpt:
If your program must be console based,
you have to switch your terminal out
of line mode into character mode, and
remember to...
How to find the kth smallest element in the union of two sorted arrays?
...uch i and j so that a[i-1] < b[j-1] < a[i] (or the other way round). Now since there are i elements in 'a' smaller than b[j-1], and j-1 elements in 'b' smaller than b[j-1], b[j-1] is the i + j-1 + 1 = kth smallest element. To find such i,j the algorithm does a dichotomic search on the arrays. ...
Why is it bad style to `rescue Exception => e` in Ruby?
...thing else".
Generally, don't do that, except in special cases where you know you don't need to worry. One example:
debugger rescue nil
The debugger function is a rather nice way to set a breakpoint in your code, but if running outside a debugger, and Rails, it raises an exception. Now theoret...
Are there disadvantages to using a generic varchar(255) for all text-based fields?
...ng, this can make the temporary table very large.
You may also like to know that this "padding out" behavior means that a string declared with the utf8 character set pads out to three bytes per character even for strings you store with single-byte content (e.g. ascii or latin1 characters). And l...
What is the point of interfaces in PHP?
...ady abstract classes?
To prevent multiple inheritance (can cause multiple known problems).
One of such problems:
The "diamond problem" (sometimes referred to as the "deadly diamond of
death") is an ambiguity that arises when two classes B and C inherit
from A and class D inherits from both ...