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What do I have to do to get Core Data to automatically migrate models?
... with two different entities xxx" even after cleaning up the build several times...Your might have issues with how the managedObjectModel is being loaded...take at look at this one...which helped me fix it..
core data migration problems
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How to read the Stock CPU Usage data
...cle about this.
The numbers show the average load of the CPU in different time intervals. From left to right: last minute/last five minutes/last fifteen minutes
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Writing a list to a file with Python
...he square brackets [], so that the strings to be printed get made one at a time (a genexp rather than a listcomp) -- no reason to take up all the memory required to materialize the whole list of strings.
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How to send an email with Python?
...w your constant advertising for yagmail (yes, Sir, I will consider it next time, Sir ;). But I find it very confusing that almost no one seems to care for OPs issue, but rather suggests much different solutions. It's as if I am asking how to change bulbs in my 2009 smart and the answer is: Buy a rea...
Parsing a comma-delimited std::string [duplicate]
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Input one number at a time, and check whether the following character is ,. If so, discard it.
#include <vector>
#include <string>
#include <sstream>
#include <iostream>
int main()
{
std::string str = "1,2,3,4,5,6";
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Difference between 3NF and BCNF in simple terms (must be able to explain to an 8-year old)
...tennis club:
Today's Tennis Court Bookings (3NF, not BCNF)
Court Start Time End Time Rate Type
------- ---------- -------- ---------
1 09:30 10:30 SAVER
1 11:00 12:00 SAVER
1 14:00 15:30 STANDARD
2 10:00 11:30 PREMIU...
Using os.walk() to recursively traverse directories in Python
...r.py: ..."""
__author__ = "legendmohe"
import os
import argparse
import time
class FileTreeMaker(object):
def _recurse(self, parent_path, file_list, prefix, output_buf, level):
if len(file_list) == 0 \
or (self.max_level != -1 and self.max_level <= level):
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Java RegEx meta character (.) and ordinary dot?
... means. At the start of the string there can be any character zero or more times followed by a dot "." followed by a star (*) at the end of the string.
I hope this comes in handy for someone. Thanks for the backslash thing to Fabian.
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Calculate the median of a billion numbers
...o once the initial partitioning of the data is complete, estimated running time is the combination of the time to sort 1/99th of the data and send it back to the control computer, and the time for the control to read 1/2 the data. The "combination" is somewhere between the maximum and the sum of tho...
How can I get a count of the total number of digits in a number?
...ve implemented before editing this question (it had to be edited a million times already), there was a specific case pointed out by @GyörgyKőszeg, in which the IF-CHAIN method performs slower than the LOG10 method.
This still happens, although the magnitude of the difference became much lower aft...