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NSNotificationCenter addObserver in Swift
...t require you to use selector strings which couldn't be statically checked by the compiler and so were fragile to breaking if the method is renamed, but Swift 2.2 and later include #selector expressions that fix that problem.
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How does Hadoop process records split across block boundaries?
... the code for the details and here are my thoughts. The splits are handled by the client by InputFormat.getSplits, so a look at FileInputFormat gives the following info:
For each input file, get the file length, the block size and calculate the split size as max(minSize, min(maxSize, blockSize)) w...
How can I break up this long line in Python?
...ehavior. Your first option is to join string literals together implicitly by making them adjacent to one another:
("This is the first line of my text, "
"which will be joined to a second.")
Or with line ending continuations, which is a little more fragile, as this works:
"This is the first line...
What does the “map” method do in Ruby?
...anil', 'edmund']
# here we map one array to another, convert each element by some rule
names.map! {|name| name.capitalize } # now names contains ['Danil', 'Edmund']
names.each { |name| puts name + ' is a programmer' } # here we just do something with each element
The output:
Danil is a programm...
create two method for same url pattern with different arguments
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You can use the params parameter to filter by HTTP parameters. In your case it would be something like:
@RequestMapping(value = "/searchUser", params = "userID")
public String searchUserById(@RequestParam long userID, Model model) {
// ...
}
@RequestMapping(value ...
Comparing date part only without comparing time in JavaScript
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Please be aware that testing by date1 === date2 does not seem to provide consistent behaviour; it's better to do date1.valueOf() === b.valueOf() or even date1.getTime() === date2.getTime(). Strangeness.
– Erwin Wessels
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Can I assume (bool)true == (int)1 for any C++ compiler?
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@Joshua: true is a keyword defined by the language. It can not be redefined by a library. #defines are not allowed to redefine keywords.
– jalf
Apr 27 '10 at 21:04
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Is it a good practice to use try-except-else in Python?
...ple, testing os.path.exists results in information that may be out-of-date by the time you use it. Likewise, Queue.full returns information that may be stale. The try-except-else style will produce more reliable code in these cases.
"It my understanding that exceptions are not errors, they sho...
How to apply CSS to iframe?
...rame>
The style of the page embedded in the iframe must be either set by including it in the child page:
<link type="text/css" rel="Stylesheet" href="Style/simple.css" />
Or it can be loaded from the parent page with Javascript:
var cssLink = document.createElement("link");
cssLink.hr...
Blank HTML SELECT without blank item in dropdown list
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You can by setting selectedIndex to -1 using .prop: http://jsfiddle.net/R9auG/.
For older jQuery versions use .attr instead of .prop: http://jsfiddle.net/R9auG/71/.
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