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How do I choose between Tesseract and OpenCV? [closed]
... image inputs (a single word, line, paragraph, page, limited dictionaries, etc.).
OpenCV, on the other hand, is a computer vision library that includes features that let you perform some feature extraction and data classification. You can create a simple letter segmenter and classifier that performs...
Regular Expression for alphanumeric and underscores
... flavors. \w includes letters with diacritics, letters from other scripts, etc.
– Jan Goyvaerts
Dec 3 '08 at 7:45
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JRuby on Rails vs. Ruby on Rails, what's difference?
... to do this completely (last time I used Mingle, it had un-obfuscated Ruby files...).
– Marnen Laibow-Koser
Nov 3 '11 at 16:31
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What's the advantage of Logic-less template (such as mustache)?
... yourself in the foot. In the old JSP days, it was very common to have JSP files sprinkled with Java code, which made refactoring much harder, since you had your code scattered.
If you prevent logic in templates by design (like mustache does), you will be obliged to put the logic elsewhere, so your...
Converting a string to a date in JavaScript
...parts[1]); JavaScript counts months from 0:
// January - 0, February - 1, etc.
var mydate = new Date(parts[0], parts[1] - 1, parts[2]);
console.log(mydate.toDateString());
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What is WebKit and how is it related to CSS?
...ions relating to CSS, jQuery, layouts, cross-browers compatibility issues, etc...
14 Answers
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Pass a data.frame column name to a function
...1(df, "B")
fun1(df, c("B","A"))
There's no need to use substitute, eval, etc.
You can even pass the desired function as a parameter:
fun1 <- function(x, column, fn) {
fn(x[,column])
}
fun1(df, "B", max)
Alternatively, using [[ also works for selecting a single column at a time:
df <- ...
Freeze screen in chrome debugger / DevTools panel for popover inspection?
...r window and you have 5 seconds to find your element and click/hover/focus/etc it, before the breakpoint will be hit and the browser will "freeze".
Now you can inspect your clicked/hovered/focused/etc element in peace.
Of course you can modify the javascript and the timing, if you get the idea.
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Setting log level of message at runtime in slf4j
...Logback uses SLF4J and the migration will be painless, just the xml config files will have to be changed.
Remember to set the log level back after you're done.
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What's a correct and good way to implement __hash__()?
...pedia also has a summary of various collision resolution methods:
Also, "File Organization And Processing" by Tharp covers alot of collision resolution methods extensively. IMO it's a great reference for hashing algorithms.
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