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Convert float to double without losing precision
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It's not that you're actually getting extra precision - it's that the float didn't accurately represent the number you were aiming for originally. The double is representing the original float accurately; toString is showing the "extra" data which wa...
Preview an image before it is uploaded
...file (image) before it is uploaded. The preview action should be executed all in the browser without using Ajax to upload the image.
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How to disable all div content
I was under the assumption that if I disabled a div, all content got disabled too.
27 Answers
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Random record in ActiveRecord
...ed Sep 24 '14 at 20:13
Jonathan Allard
15.9k99 gold badges4949 silver badges7070 bronze badges
answered May 2 '10 at 12:09
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Add regression line equation and R^2 on graph
...n my machine, where the label is overwritten as many times as the data is called, resulting in a thick and blurry label text. Passing the labels to a data.frame first works (see my suggestion in a comment below.
– PatrickT
Apr 29 '14 at 10:52
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What do @, - and + do as prefixes to recipe lines in Make?
...cuted.
- means ignore the exit status of the command that is executed (normally, a non-zero exit status would stop that part of the build).
+ means 'execute this command under make -n' (or 'make -t' or 'make -q') when commands are not normally executed. See also the POSIX specification for make and ...
HTML/CSS: Make a div “invisible” to clicks?
...the overlay.
See the first answer to this question:
HTML "overlay" which allows clicks to fall through to elements behind it
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Can we have functions inside functions in C++?
...rm of a lambda:
int main() {
// This declares a lambda, which can be called just like a function
auto print_message = [](std::string message)
{
std::cout << message << "\n";
};
// Prints "Hello!" 10 times
for(int i = 0; i < 10; i++) {
print...
Efficient way to insert a number into a sorted array of numbers?
... setup, the native method doesn't make up for it. This is true even for small data sets, inserting 100 elements into an array of 1000:
First Method:
1 milliseconds
Second Method:
34 milliseconds
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Junit - run set up method once
...Before I would like to have a setup method that executes only once before all tests. Is that possible with Junit 4.8?
10 A...