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Create an empty list in python with certain size
...n do this to initialize a list with values from 0 to 9:
lst = range(10)
And in Python 3.x:
lst = list(range(10))
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Type erasure techniques
... erasure techniques in C++ are done with function pointers (for behaviour) and void* (for data). The "different" methods simply differ in the way they add semantic sugar. Virtual functions, e.g., are just semantic sugar for
struct Class {
struct vtable {
void (*dtor)(Class*);
vo...
Convert the values in a column into row names in an existing data frame
...into row names. Is is possible to do this without exporting the data frame and then reimporting it with a row.names = call?
...
If statement in aspx page
... { %>
some html
<% } %>
2) Wrap the parts in a Panel control and in codebehind use the if statement to set the Visible property of the Panel.
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Is CSS Turing complete?
...ing-complete so long as you consider an appropriate accompanying HTML file and user interactions to be part of the “execution” of CSS. A pretty good implementation is available, and another implementation is included here:
body {
-webkit-animation: bugfix infinite 1s;
margin: 0.5e...
Disable hover effects on mobile browsers
I'm writing a Web site that's meant to be used from both desktops and tablets. When it's being visited from a desktop, I want the clickable areas of the screen to light up with :hover effects (different background color, etc.) With a tablet, there's no mouse, so I don't want any hover effects.
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Call a Javascript function every 5 seconds continuously [duplicate]
...
Do a "recursive" setTimeout of your function, and it will keep being executed every amount of time defined:
function yourFunction(){
// do whatever you like here
setTimeout(yourFunction, 5000);
}
yourFunction();
...
Deleting folders in python recursively
...
Try rmtree() in shutil from the Python standard library
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Why am I getting error for apple-touch-icon-precomposed.png
...ollowing logs many times in my server logs. Why I am getting these request and how can I avoid these?
11 Answers
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How to create custom exceptions in Java? [closed]
... it:
public void calculate(int i) throws FooException, IOException;
... and code calling this method must either handle or propagate this exception (or both):
try {
int i = 5;
myObject.calculate(5);
} catch(FooException ex) {
// Print error and terminate application.
ex.printStackTrace()...