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Should all Python classes extend object?
...e data model. Can it be seriously argued that str does not always accept a string as an argument because one could assign builtins.str = None?
– Nuno André
Dec 8 '18 at 14:26
...
Split a vector into chunks in R
...o n-chunks I used max <- length(d)%/%n. I used this with a vector of 31 strings and obtained a list of 3 vectors of 10 sentences and one of 1 sentence.
– salvu
Feb 4 '17 at 12:59
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What are some methods to debug Javascript inside of a UIWebView?
...
Does still work, use it like this: [NSClassFromString(@"WebView") performSelector:@selector(_enableRemoteInspector)]; Remember to remove the call when you build for release!
– rpitting
Apr 3 '12 at 13:58
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How can I open a cmd window in a specific location?
... clean prompt without the initial cd command shown? Append &cls to the string like so: cmd.exe /K "cd /d H:\Python\&cls" (documentation) And save this line into a jumpstart.bat file for easy access by just double clicking it.
– Christiaan Westerbeek
Ju...
Why are interface variables static and final by default?
... int x=66;
}
public class D implements A,B {
public static void main(String[] a){
System.out.println(x); // which x?
}
}
Here is the solution.
System.out.println(A.x); // done
I think it is the one reason why interface variable are static.
Don't declare variables inside Inter...
How to check if object has any properties in JavaScript?
...
Object.keys("mystring"); yields keys as well which I think is undesirable. This answer is incomplete in my opinion.
– Mike de Klerk
Sep 2 '17 at 17:15
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How to “EXPIRE” the “HSET” child key in redis?
...d zset Redis objects under the hood. Usage example:
RMapCache<Integer, String> map = redisson.getMapCache('map');
map.put(1, 30, TimeUnit.DAYS); // this entry expires in 30 days
This approach is quite useful.
share
...
Check free disk space for current partition in bash
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In my Red-Hat something, the format string should be %a*%s instead of %a*%S. I'm not sure if this is a difference or a typo.
– RnMss
Jun 27 '13 at 8:00
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Detect when an image fails to load in Javascript
...
/**
* Tests image load.
* @param {String} url
* @returns {Promise}
*/
function testImageUrl(url) {
return new Promise(function(resolve, reject) {
var image = new Image();
image.addEventListener('load', resolve);
image.addEventListener('error',...
Improve INSERT-per-second performance of SQLite
...NSIENT for those inserts.
SQLITE_TRANSIENT will cause SQLite to copy the string data before returning.
SQLITE_STATIC tells it that the memory address you gave it will be valid until the query has been performed (which in this loop is always the case). This will save you several allocate, copy an...