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How do I delete all untracked files from my working directory in Mercurial?
...kovKuperman I guess adding extension is lesser work than this command (one time enabling). I do not enable purge extension because I need it less than once in a fortnight. Also call me silly but, typing this command gives me enough time to think again before doing something as desctructive as 'purge...
Python setup.py develop vs install
...to frequently edit the code without having to re-install the package every time — and that is exactly what python setup.py develop does: it installs the package (typically just a source folder) in a way that allows you to conveniently edit your code after it’s installed to the (virtual) environm...
What is the advantage of GCC's __builtin_expect in if else statements?
...t? Let's find out!
Without __builtin_expect
#include "stdio.h"
#include "time.h"
int main() {
/* Use time to prevent it from being optimized away. */
int i = !time(NULL);
if (i)
puts("a");
return 0;
}
Compile and decompile with GCC 4.8.2 x86_64 Linux:
gcc -c -O3 -std=gn...
How do lexical closures work?
...
s/at compile time/at the moment when def statement is executed/
– jfs
Oct 25 '08 at 17:01
23
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Default string initialization: NULL or Empty? [closed]
... You're right, my last assertion was not clear enough. Most times, my database columns are NOT NULL (because there would be no difference bewteen the meaning of empty string and NULL), so I attempt to keep my strings similar by never storing null in them, and that is what I meant.
...
deleting rows in numpy array
... @arturomp but the mask is nondestructive. Is a call to delete() time/memory consuming?
– Nathan
Mar 28 '18 at 18:19
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JavaScript before leaving the page
... Is there anyway to know when it is refresh vs when its first time?
– Si8
Jan 13 '17 at 0:00
When a user ...
Android Fragment lifecycle over orientation changes
...tivity when it's recreated. This is a massive pain in the rear most of the time.
You can stop errors occurring by using the same Fragment rather than recreating a new one. Simply add this code:
if (savedInstanceState == null) {
// only create fragment if activity is started for the first time
...
Do interfaces inherit from Object class in java
... that you have a class that is a subtype of employee.
The JVM will do runtime checking for your code (i.e. throw NullPointerException).
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Plurality in user messages
Many times, when generating messages to show to the user, the message will contain a number of something that I want to inform the customer about.
...