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Why does volatile exist?
... in straight C. We used a hardware managed 16 bit value as a semaphore to know when the other guy was done. Essentially we did this:
void waitForSemaphore()
{
volatile uint16_t* semPtr = WELL_KNOWN_SEM_ADDR;/*well known address to my semaphore*/
while ((*semPtr) != IS_OK_FOR_ME_TO_PROCEED);
}...
What is the most efficient way to store a list in the Django models?
...izing and deserializing values from the database to Python and vice versa. Now you can easily import and use our custom field in the model class:
from django.db import models
from custom.fields import SeparatedValuesField
class Person(models.Model):
name = models.CharField(max_length=64)
...
How to replace multiple substrings of a string?
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nice! if you use python3 use items instead of iteritems (now removed in dicts stuff).
– e.arbitrio
Oct 24 '16 at 12:09
2
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How can I pad a value with leading zeros?
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Now you just need to take care of numbers like 50.1234 and you've got a readable version of my solution below! I did, however, assume that we were just left padding, not overall padding.
– coderjoe
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Accessing members of items in a JSONArray with Java
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How would this work if I know the ID but need the matching loc?
– ToofanHasArrived
Mar 5 '19 at 23:45
add a comment
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Why are empty strings returned in split() results?
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Thank you for this, I don't know why this answer is so far down, everything else is rudimentary stuff.
– Wedge
Apr 6 '17 at 18:11
7
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Is it possible to specify a different ssh port when using rsync?
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Worked for me too! I don't know why the most-voted answer does not work...
– ch271828n
Feb 12 '18 at 12:06
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Nginx location priority
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There is a handy online testing tool for location priority now:
location priority testing online
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Why is it Valid to Concatenate Null Strings but not to Call “null.ToString()”?
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@Svish yes, now I think of it again, it is a null object, so you're right, it won't work. It wouldn't in Java neither: null pointer exception. Never mind. Tnx for your reply! [edit: tested it in Java: NullPointerException. With the diffe...
What does {0} mean when initializing an object?
...cted non-static data members, no base classes, and no virtual functions.
Now, using {0} to initialize an aggregate like this is basically a trick to 0 the entire thing. This is because when using aggregate initialization you don't have to specify all the members and the spec requires that all uns...