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How to convert an entire MySQL database characterset and collation to UTF-8?
...CTER SET utf8 COLLATE utf8_general_ci;'
mysql "$DB" -e "SHOW TABLES" --batch --skip-column-names \
| xargs -I{} echo 'ALTER TABLE `'{}'` CONVERT TO CHARACTER SET utf8 COLLATE utf8_general_ci;'
) \
| mysql "$DB"
One-liner for simple copy/paste
DB="dbname"; ( echo 'ALTER DATABASE `'"$DB"'` ...
SqlException from Entity Framework - New transaction is not allowed because there are other threads
...likely to have a clustered index.
This version will query the database in batches of 100. Note that SaveChanges() is called for each entity.
If you want to improve your throughput dramatically, you should call SaveChanges() less frequently. Use code like this instead:
foreach (var chunk in clie...
“NODE_ENV” is not recognized as an internal or external command, operable command or batch file
... is not recognized as an internal or external command, operable program or batch file.
– Rod Lima
Mar 22 '18 at 13:53
|
show 2 more comments...
How efficient is locking an unlocked mutex? What is the cost of a mutex?
...ng): (1) a flag indicating whether the mutex is locked or not and (2) wait queue.
Change of the flag is just few instructions and normally done without system call. If mutex is locked, syscall will happen to add the calling thread into wait queue and start the waiting. Unlocking, if the wait queue ...
Batch file: Find if substring is in string (not in a file)
In a batch file, I have a string abcdefg . I want to check if bcd is in the string.
10 Answers
...
Change from SQLite to PostgreSQL in a fresh Rails project
...dapter: sqlite3
# database: db/development.sqlite3
# pool: 5
# timeout: 5000
development:
adapter: postgresql
encoding: unicode
database: f3_development
pool: 5
username: f3
password:
#test:
# adapter: sqlite3
# database: db/test.sqlite3
# pool: 5
# timeout: 5000
test:
adapte...
Thread Safety in Python's dictionary
... variable assignment (since this in turn depends on dictionaries).
Use the Queue module's Queue data type as the preferred way to communicate data between threads. Otherwise, use the threading module and its locking primitives. Learn about the proper use of condition variables so you can use threadi...
How can I efficiently select a Standard Library container in C++11?
...ontainers
and then you can build several adapters on top of them: stack, queue, priority_queue. I will leave the adapters out here, they are sufficiently specialized to be recognizable.
Question 1: Associative ?
If you need to easily search by one key, then you need an associative container
I...
Error in SQL script: Only one statement is allowed per batch
... so just one statement is allowed in such file by design. Go nor any other batch terminator will change that behavior, that message is just mistake.
More info here.
There is lot of other build options for files in such project.
For your case it seems that PostDeploy. In such file you could have var...
How To Launch Git Bash from DOS Command Line?
...n able to find the answer yet. I would like to launch Git Bash from a DOS batch file. Here is what I tried so far:
9 Answ...