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During the development of the Hybrid App, there is one of t
Tag: key
Android SingleTask launch mode with the HOME key
We know the influence of SingleTask mode on Activity is as follows:
For example, if we set Activity A to SingleTask mode, and other Acitivity to Standard mode, there are the following effects
Ruby-on-rails-3 – How to name the foreign key in ROR 3?
How to name foreign keys in RoR?
I used the following command to give the foreign key:
rails generate scaffold Table2 id:integer Table1:references this The command adds the foreign key
Delphi – Tregistry – Why is some keys readable and some keys are not available?
I wrote the following code:
var
MainForm: TMainForm;
const
SRootKey = HKEY_LOCAL_MACHINE;
SKey =’SOFTWARE\Microsoft\Windows NT\CurrentVersion\NetworkList\Profiles’;
implementation
{$ R *.d
Mysql: Error 1215 (HY000): Unable to add foreign key constraints
I have read about database system concepts, 6th edition, Silberschatz. I will implement the university database system shown in Chapter 2 on MySQL’s OS X. But I’m in the course of creating tables I
MySQL – Insert Update On Duplicate Key Update
Insert a record into the database. If the primary key value (UNIQUE KEY) of the data already exists in the table, perform the following UPDATE operation. Otherwise, perform the previous INSERT oper
Performance – Accelerate compilation time using USB key?
Since the compilation is mainly to read small files, I would like to know whether buying a fast USB key can speed up the compilation time, compared with standard SATA drives, and the price is lower
Emacs – Retrieve key from the hash table and effectively sorted values
I’m using Emacs Lisp, but the cl package is loaded for some common lisp functions.
I have a system with up to 50K entries Hash table, integer keys are mapped to triples, like this (but in the
Partition – whether the partition key is required when retrieved by the document ID
Can a document be retrieved by its ID without specifying a partition key?
My understanding when reading the documentation is that when the partition key is not specified, the query will fan o
ELIXIR – How do I retrieve the ETS key list without scanning the entire table?
I use ets to store and retrieve keys through elixir as a simple memory persistence layer, and also for occasional foldl, which involves reducing many duplicate keys with different values. I am usin