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What does scale horizontally and scale vertically mean? [duplicate]
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In simple terms, to scale horizontally is adding more servers. Vertically to increase the resources of the server.
You can find more info on Wikipedia.
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php create object without class [duplicate]
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+1 for the PHP 5.4 method, this makes code shorter, more readable, especially when you have several items to add to the object.
– mark
Feb 17 '16 at 10:11
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Deleting all pending tasks in celery / rabbitmq
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I found that celery purge doesn't work for my more complex celery config. I use multiple named queues for different purposes:
$ sudo rabbitmqctl list_queues -p celery name messages consumers
Listing queues ... # Output sorted, whitespaced for readability
celery ...
generating GUID without hyphen
...w question and try to ask what you really want to achieve - it seems to be more than just getting rid of hyphens in GUID strings.
– Christian.K
Jan 16 '12 at 9:04
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How do I import global modules in Node? I get “Error: Cannot find module ”?
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Multiple types were found that match the controller named 'Home'
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Django. Override save for model
...eresting method.. by i dont understand it fully. Can you please explain it more explicatively? Or sow some article?
– Pol
Nov 24 '10 at 19:57
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Filter rows which contain a certain string
...)) or previously filter_at. The advantage is that you can easily extend to more than one column.
Below also a solution with filter_all in order to find the string in any column,
using diamonds as example, looking for the string "V"
library(tidyverse)
String in only one column
# for only one column....
Unioning two tables with different number of columns
..._c from test1_1790
union all
select col_a, col_b, col_c from test2_1790;
A more frequent scenario for this error is when you inadvertently swap (or shift) two or more columns in the SELECT list:
select col_a, col_b, col_c from test1_1790
union all
select col_a, col_c, col_b from test2_1790;
OR if...