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What does it mean to start a PHP function with an ampersand?
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An ampersand before a function name means the function will return a reference to a variable instead of the value.
Returning by reference is useful when
you want to use a function to find to
which variable a reference should b...
Why does HTML5 form-validation allow emails without a dot?
... The client side validation should be only for giving feedback to the user and not be relied on, since it can be easily bypassed.
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What is the difference between Spring, Struts, Hibernate, JavaServer Faces, Tapestry?
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Spring is an IoC container (at least the core of Spring) and is used to wire things using dependency injection. Spring provides additional services like transaction management and seamless integration of various other technologies.
Struts is an action-based presentation framework (...
What is the purpose of the HTML “no-js” class?
...lot of template engines, in the HTML5 Boilerplate , in various frameworks and in plain php sites there is the no-js class added onto the <HTML> tag.
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What are the differences between ArrayList and Vector?
What are the differences between the two data structures ArrayList and Vector , and where should you use each of them?
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How to disable google translate from html in chrome
...his should still work but is less desirable because it is Google-specific, and there are other translation services out there.)
Add this tag in between <head> and </head>:
<meta name="google" content="notranslate">
Documentation reference
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How to elegantly rename all keys in a hash in Ruby? [duplicate]
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Just use mappings[k] || k instead of mappings[k] above and it will leave keys not in the mapping as is.
– Mladen Jablanović
Nov 9 '10 at 20:26
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Omit rows containing specific column of NA
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You could use the complete.cases function and put it into a function thusly:
DF <- data.frame(x = c(1, 2, 3), y = c(0, 10, NA), z=c(NA, 33, 22))
completeFun <- function(data, desiredCols) {
completeVec <- complete.cases(data[, desiredCols])
return(data...
Creating a jQuery object from a big HTML-string
...le.net/MCSyr/2/
It parses the arbitrary HTML string into a jQuery object, and uses find to display the result in a div.
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Get DateTime.Now with milliseconds precision
...esolution of around 10-15 ms. See Eric Lippert's blog post about precision and accuracy for more details.
If you need more accurate timing than this, you may want to look into using an NTP client.
However, it's not clear that you really need millisecond accuracy here. If you don't care about the e...