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delete vs delete[] operators in C++
...ate memory allocated for array of objects
class ABC{}
ABC *ptr = new ABC[100]
when we say new ABC[100], compiler can get the information about how many objects that needs to be allocated(here it is 100) and will call the constructor for each of the objects created
but correspondingly if we simp...
How can I override Bootstrap CSS styles?
... priorities.
Basically, every selector has its own numerical 'weight':
100 points for IDs
10 points for classes and pseudo-classes
1 point for tag selectors and pseudo-elements
Note: If the element has inline styling that automatically wins (1000 points)
Among two selector styles browser will ...
Quicksort vs heapsort
.../~jmor159/PLDS210/qsort3.html, the heap sort takes 2,842 comparisons for n=100, but it takes 53,113 comparisons for n=500. And that implies the ratio between n=500 and n=100 is 18 times, and it is NOT matching the heap sort algorithm with O(N logN) complexity. I guess it's pretty likely that their h...
Convert PDF to image with high resolution
... \
-density 150 \
-trim \
test.pdf \
-quality 100 \
-flatten \
-sharpen 0x1.0 \
24-18.jpg
It results in the left image. Compare this to the result of my original command (the image on the right):
(To really see and appreciate the differences be...
CSS table-cell equal width
...1/
You can fix a width to each parent div (the table), otherwise it'll be 100% as usual.
The trick is to use table-layout: fixed; and some width on each cell to trigger it, here 2%. That will trigger the other table algorightm, the one where browsers try very hard to respect the dimensions indicat...
Java JTable setting Column Width
...
Try adding setMaxWidth(10000) to see if that makes a difference.
– Eddie
Jun 5 '09 at 4:03
1
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Regular expression to match numbers with or without commas and decimals in text
...sion below
#### NUMBERS AND DECIMALS ONLY ####
#No commas allowed
#Pass: (1000.0), (001), (.001)
#Fail: (1,000.0)
^\d*\.?\d+$
#No commas allowed
#Can't start with "."
#Pass: (0.01)
#Fail: (.01)
^(\d+\.)?\d+$
#### CURRENCY ####
#No commas allowed
#"$" optional
#Can't start with "."
#Either 0 or 2 ...
CSS transition shorthand with multiple properties?
...concise code.
/* prefixes omitted for brevity */
.box {
height: 100px;
width: 100px;
background: red;
box-shadow: red 0 0 5px 1px;
transition: all 500ms ease;
/*note: not transitioning width */
transition-property: height, background, box-shadow;
}
.box:h...
How to do math in a Django template?
...
You can use the add filter:
{{ object.article.rating_score|add:"-100" }}
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Overlaying histograms with ggplot2 in R
...'s a concrete example with some output:
dat <- data.frame(xx = c(runif(100,20,50),runif(100,40,80),runif(100,0,30)),yy = rep(letters[1:3],each = 100))
ggplot(dat,aes(x=xx)) +
geom_histogram(data=subset(dat,yy == 'a'),fill = "red", alpha = 0.2) +
geom_histogram(data=subset(dat,yy == 'b'...