大约有 19,000 项符合查询结果（耗时：0.0280秒） [XML]
ORA-12505, TNS:listener does not currently know of SID given in connect descriptor
... and run ALTER SYSTEM REGISTER. Then exit from SQL*Plus and try the first form again.
If the third one fails but the second one works, add your user account to the ora_dba group. Do this in Control Panel > Computer Management > Local Users and Groups.
Once you can get connections of the fo...
Difference between hard wrap and soft wrap?
...
soft : The text in the textarea is not wrapped when submitted in a form. This is default
hard : The text in the textarea is wrapped (contains newlines) when submitted in a form. When "hard" is used, the cols attribute must be specified
Reference: W3Schools
...
Trying to start a service on boot on Android
...ces
adb in ADT by default you can find in:
adt-installation-dir/sdk/platform-tools
Enjoy! )
share
|
improve this answer
|
follow
|
...
How to create a new file together with missing parent directories?
...cludes parent directories, i.e. if you are certain that the path is of the form <parent-dir>/<file-name>.
If it does not, i.e. it is a relative path of the form <file-name>, then getParentFile() will return null.
E.g.
File f = new File("dir/text.txt");
f.getParentFile().mkdirs()...
What does @@variable mean in Ruby?
... 100% as you expect; the article I linked above has plenty of additional information on the subject.
Also keep in mind that, as with most data, you should be extremely careful with class variables in a multithreaded environment, as per dmarkow's comment.
...
Get cookie by name
... I set up a jsperf test for the offered solutions: jsperf.com/getcookie-performance . Performance strongly differs between browsers.
– sborn
Oct 16 '19 at 14:31
...
Index on multiple columns in Ruby on Rails
...at the beginning. i.e. if you index on [:user_id, :article_id], you can perform a fast query on user_id or user_id AND article_id, but NOT on article_id.
Your migration add_index line should look something like this:
add_index :user_views, [:user_id, :article_id]
Question regarding 'unique' ...
Is a statically-typed full Lisp variant possible?
...te, let's take a look at the list structure itself, called the cons, which forms the primary building block of Lisp.
Calling the cons a list, though (1 2 3) looks like one, is a bit of a misnomer. For example, it's not at all comparable to a statically typed list, like C++'s std::list or Haskell's ...
Why are empty strings returned in split() results?
...to be equal to ['segment', 'segment'] is reasonable, but then this loses information. If split() worked the way you wanted, if I tell you that a.split('/') == ['segment', 'segment'], you can't tell me what a was.
What should be the result of 'a//b'.split() be? ['a', 'b']?, or ['a', '', 'b']? I.e., ...
Parcelable where/when is describeContents() used?
...ace
Implementing multiple inheritance by rules defined in human readable form? :-)
It seems like C++ programmer designed Parceable and at some point he realized: Oh, damn, there is no multiple inheritance in Java... :-)
s...