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What do I have to do to get Core Data to automatically migrate models?
...oordinator: %@",error);
}
Then you need to do a little trick in xCode:
Select your xcdatamodel file
Select the Design Menu at the top - then Data Model - then choose Add Model Version
Your xcdatamodel file will then get moved into a new directory with the same name as your xcdatamodel file but w...
Flatten List in LINQ
...
Try SelectMany()
var result = iList.SelectMany( i => i );
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Convert array of integers to comma-separated string
...= new int[5] {1,2,3,4,5};
You can use Linq for it
String arrTostr = arr.Select(a => a.ToString()).Aggregate((i, j) => i + "," + j);
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fo...
Mercurial (hg) commit only certain files
...ke this:
$ hg commit -I foo.c -I "**/*.h"
You can even use a fileset to select the files you want to commit:
$ hg commit "set:size(1k - 1MB) and not binary()"
There is no setting that will turn off the auto-add behavior and make Mercurial work like Git does. However, the mq extension might be ...
ERROR: Error 1005: Can't create table (errno: 121)
...y used somewhere else
To check constraints use the following SQL query:
SELECT
constraint_name,
table_name
FROM
information_schema.table_constraints
WHERE
constraint_type = 'FOREIGN KEY'
AND table_schema = DATABASE()
ORDER BY
constraint_name;
Look for more information there,...
JavaScript hashmap equivalent
...nctional solution is simple and fast.
The key function can be as simple as selecting right attributes of the object, e.g., a key, or a set of keys, which are already unique, a combination of keys, which are unique together, or as complex as using some cryptographic hashes like in DojoX encoding, or ...
How do I remove the “extended attributes” on a file in Mac OS X?
...
Answer (Individual Files)
1. Showcase keys to use in selection.
xattr ~/Desktop/screenshot\ 2019-10-23\ at\ 010212.png
# com.apple.FinderInfo
# com.apple.lastuseddate#PS
# com.apple.metadata:kMDItemIsScreenCapture
# com.apple.metadata:kMDItemScreenCaptureGlobal...
Why is Visual Studio 2013 very slow?
...available" check box to prevent the use of hardware graphics acceleration.
Select or clear the "Enable rich client visual experience" check box to make sure that rich visuals are always on or off, respectively. When this check box is selected, rich visuals are used independent of the computer enviro...
TFS Get Specific Version into separate folder
...orer
Drill down to desired file
File > Source Control > View History
Select desired version (Changeset)
Toolbar/Context Menu > Compare
Click in left pane, Select All, Copy, paste into Your Favorite Editor and save
...
Running multiple async tasks and waiting for them all to complete
...; sequence, Func<T, Task> action) {
return Task.WhenAll(sequence.Select(action));
}
Call it like this:
await sequence.ForEachAsync(item => item.SomethingAsync(blah));
Or with an async lambda:
await sequence.ForEachAsync(async item => {
var more = await GetMoreAsync(item);
...