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What is HEAD in Git?
...out a commit that doesn't have a label , it's in detached HEAD state. That means HEAD is pointing to a commit that doesn't have a branch label. If you checkout 34ac2 in above example, now HEAD would be pointing to that commit and it's called a detached HEAD. In this state, you can make changes, expe...
Finding duplicate values in MySQL
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What would it mean if it said ERROR: column "c" does not exist LINE 1?
– User
Oct 4 '15 at 17:36
16
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Nullable Foreign Key bad practice?
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Only if you know better than Chris Date "what first normal form really means". If x and y are both nullable, and indeed in some row x and y are both null, then WHERE x=y does not yield true. This proves beyond reasonable doubt that null is not a value (because any real value is always equal to...
Another Repeated column in mapping for entity error
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The message is clear: you have a repeated column in the mapping. That means you mapped the same database column twice. And indeed, you have:
@Column(nullable=false)
private Long customerId;
and also:
@ManyToOne(optional=false)
@JoinColumn(name="customerId",referencedColumnName="id_customer"...
What is the meaning and difference between subject, user and principal?
...of precision. But in human language we need nuance and precision to convey meaning efficiently.
– T.Rob
Feb 17 '11 at 13:14
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The relationship could not be changed because one or more of the foreign-key properties is non-nulla
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So what if some are only changed? Does that mean I still have to remove them and add them again?
– jaffa
Apr 4 '11 at 17:10
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Acronyms in CamelCase [closed]
...: IN is inch(es)). Or, IDById(id) vs IdById(id), context science (hint: ID means infectious desease). "Two characters long" - what in which context?
– Frederik Krautwald
May 28 '15 at 23:14
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Set the selected index of a Dropdown using jQuery
...nds-with] is way slower, thats what the "assign a class to the element" is meaning
– gnarf
Aug 1 '14 at 1:52
How about...
Checkout another branch when there are uncommitted changes on the current branch
...gs it's designed for. Note that git stash save or git stash push actually means "Commit all the changes, but on no branch at all, then remove them from where I am now." That makes it possible to switch: you now have no in-progress changes. You can then git stash apply them after switching.
Si...
What does principal end of an association means in 1:1 relationship in Entity framework
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Does that mean that Foo is the principal then?
– bflemi3
Nov 17 '13 at 19:04
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