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How can I listen for a click-and-hold in jQuery?
...
var timeoutId = 0;
$('#myElement').on('mousedown', function() {
timeoutId = setTimeout(myFunction, 1000);
}).on('mouseup mouseleave', function() {
clearTimeout(timeoutId);
});
Edit: correction per AndyE...thanks!
Edit 2: usi...
parseInt vs unary plus, when to use which?
...parseFloat parses and builds the string left to right. If they see an invalid character, it returns what has been parsed (if any) as a number, and NaN if none was parsed as a number.
The unary + on the other hand will return NaN if the entire string is non-convertible to a number.
parseInt('2a',10...
What is the purpose of willSet and didSet in Swift?
...alue) to \(myProperty)")
}
}
}
myProperty prints its old and new value every time it is modified. With just getters and setters, I would need this instead:
class Foo {
var myPropertyValue: Int = 0
var myProperty: Int {
get { return myPropertyValue }
set {
...
Convert data.frame columns from factors to characters
...b[i] <- lapply(bob[i], as.character)
In package dplyr in version 0.5.0 new function mutate_if was introduced:
library(dplyr)
bob %>% mutate_if(is.factor, as.character) -> bob
...and in version 1.0.0 was replaced by across:
library(dplyr)
bob %>% mutate(across(where(is.factor), as.chara...
Convert PHP closing tag into comment
...g the /x modifier
The x modifier - aka PCRE_EXTENDED - ignores spaces and newlines in a regular expression (except when they occur inside a character class); this makes it possible to add spaces to separate the problematic characters. To fix both comment styles:
$string = preg_replace('#<br\s* ...
Creating JS object with Object.create(null)?
I know a lot of ways to create JS objects but I didn't know the Object.create(null) 's one.
5 Answers
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filter items in a python dictionary where keys contain a specific string
...user iteritems to skip the value lookup, and I hate nested ifs if I can avoid them:
for key, val in d.iteritems():
if filter_string not in key:
continue
# do something
However if you realllly want something to let you iterate through a filtered dict then I would not do the two ste...
bash/fish command to print absolute path to a file
... This tool was introduced in GNU coreutils 8.15 (in 2012), so it's quite new.
– marbu
Feb 6 '14 at 22:29
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show 16 more comments
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Showing the stack trace from a running Python application
..., signal
def debug(sig, frame):
"""Interrupt running process, and provide a python prompt for
interactive debugging."""
d={'_frame':frame} # Allow access to frame object.
d.update(frame.f_globals) # Unless shadowed by global
d.update(frame.f_locals)
i = code.Intera...
How to show the loading indicator in the top status bar
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Thanks that works perfectly. Just a side note: the simulator seems to ignore this value, which made me think at first it didn't work.
– rustyshelf
Oct 3 '08 at 13:33
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