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SQL UPDATE all values in a field with appended string CONCAT not working
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+------+-------+
4 rows in set (0.02 sec)
mysql> update t set data=concat(data, 'a');
Query OK, 4 rows affected (0.01 sec)
Rows matched: 4 Changed: 4 Warnings: 0
mysql> select * from t;
+------+--------+
| id | data |
+------+--------+
| 1 | maxa |
| 2 | lindaa |
| 3 | sama...
How do I globally configure RSpec to keep the '--color' and '--format specdoc' options turned on
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As you can see in the docs here, the intended use is creating ~/.rspec and in it putting your options, such as --color.
To quickly create an ~/.rspec file with the --color option, just run:
echo '--color' >> ~/.rspec
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Using 'return' in a Ruby block
...001:0> def thing(*args, &block)
irb(main):002:1> value = block.call
irb(main):003:1> puts "value=#{value}"
irb(main):004:1> end
=> nil
irb(main):005:0>
irb(main):006:0* thing {
irb(main):007:1* return 6 * 7
irb(main):008:1> }
LocalJumpError: unexpected return
f...
How do you attach and detach from Docker's process?
I can attach to a docker process but Ctrl + c doesn't work to detach from it. exit basically halts the process.
15 Ans...
How to turn on line numbers in IDLE?
...nt window, go to Options and click Show Line Numbers.
To show them automatically, go to Options > Configure IDLE > General and check the Show line numbers in new windows box.
Version 3.7 or older:
Unfortunately there is not an option to display line numbers in IDLE although there is an enhance...
Correct approach to global logging in Golang
What's the pattern for application logging in Go? If I've got, say, 5 goroutines I need to log from, should I...
7 Answers...
How to make a in Bootstrap look like a normal link in nav-tabs?
...they have too much padding around them which messes up the layout. BUT you can fix that by adding a small amount of CSS (see @mcNux answer below)
– Martin CR
Feb 22 at 17:21
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How to sort mongodb with pymongo
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You can try this:
db.Account.find().sort("UserName")
db.Account.find().sort("UserName",pymongo.ASCENDING)
db.Account.find().sort("UserName",pymongo.DESCENDING)
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Database Structure for Tree Data Structure
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Have a look at Managing Hierarchical Data in MySQL. It discusses two approaches for storing and managing hierarchical (tree-like) data in a relational database.
The first approach is the adjacency list model, which is what you essentially describe: having a...
How to amend a commit without changing commit message (reusing the previous one)?
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Since git 1.7.9 version you can also use git commit --amend --no-edit to get your result.
Note that this will not include metadata from the other commit such as the timestamp which may or may not be important to you.
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