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How to select from subquery using Laravel Query Builder?
...misspelt the name, it should have been selectSub. I've updated my response now.
– Sasa Blagojevic
Sep 26 '18 at 7:39
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DbEntityValidationException - How can I easily tell what caused the error?
...riden SaveChanges without any refactor work.
Your exception message will now look like this:
System.Data.Entity.Validation.DbEntityValidationException: Validation
failed for one or more entities. See 'EntityValidationErrors' property
for more details. The validation errors are: The field P...
Filter LogCat to get only the messages from My Application in Android?
...
I know the question was about eclipse, but I'm in love with command line and always use it for logcat as well. Also use some tools for coloring the output like jsharkey.org/blog/2009/04/22/… makes it even useful
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Where can I get a “useful” C++ binary search algorithm?
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yes this works, and I have a similar implementation right now, however it's a "naive" implementation, in the sense that it's not making use of the situation's context, in this case sorted data.
– Robert Gould
Jan 15 '09 at 10:59
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Cannot open database “test” requested by the login. The login failed. Login failed for user 'xyz\ASP
...see the database disappear from the list of databases. Your problem should now be fixed. Go and run your application that uses your localdb.
After running your application, your database will re-appear in the list of databases - this is correct. It should not say "Pending recovery" any more since it...
Update Row if it Exists Else Insert Logic with Entity Framework
... modifications automatically
context.SaveChanges();
If you can use any knowledge about the object's key you can use something like this:
if (myEntity.Id != 0)
{
context.MyEntities.Attach(myEntity);
context.ObjectStateManager.ChangeObjectState(myEntity, EntityState.Modified);
}
else
{
...
How to count items in a Go map?
...ents queued in channel buffer
Here are a couple examples ported from the now-retired SO documentation:
m := map[string]int{}
len(m) // 0
m["foo"] = 1
len(m) // 1
If a variable points to a nil map, then len returns 0.
var m map[string]int
len(m) // 0
Excerpted from Maps - Counting map ele...
How do I remove a property from a JavaScript object?
...d values. The delete operator is used to remove these keys, more commonly known as object properties, one at a time.
var obj = {
myProperty: 1
}
console.log(obj.hasOwnProperty('myProperty')) // true
delete obj.myProperty
console.log(obj.hasOwnProperty('myProperty')) // false
T...
C/C++ line number
...wer looks like?). Another point might be (at least it looks to me this way now) that you gave an answer 1 hour after an already correct answer was given, so you added no value.
– Felix Kling
May 17 '10 at 19:21
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How do I detect whether a Python variable is a function?
I have a variable, x , and I want to know whether it is pointing to a function or not.
25 Answers
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