大约有 40,000 项符合查询结果（耗时：0.0528秒） [XML]
Transaction count after EXECUTE indicates a mismatching number of BEGIN and COMMIT statements. Previ
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Thanks for your help. By using Raiserror I have found the problem.It's about trying to insert NULL value to the NOT NULL field
– Vignesh Kumar A
Feb 21 '14 at 9:48
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Get the short Git version hash
...can do the reverse and get the long commit hash from the short commit hash by doing the following git rev-parse HEAD
– Andrew
Jan 12 '15 at 17:21
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How to redirect stderr to null in cmd.exe
...ing command redirection operators. Besides the "2>" construct mentioned by Tanuki Software, it lists some other useful combinations.
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mysql create user if not exists
...o use CREATE USER
CREATE USER IF NOT EXISTS 'user'@'localhost' IDENTIFIED BY 'password';
Note that the 5.7.6 method doesn't actually grant any permissions.
If you aren't using a version which has this capability (something below 5.7.6), you can do the following:
GRANT ALL ON `database`.* TO '...
Get current clipboard content? [closed]
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A better solution is get by the node object, but don't by window object. See here
– rplaurindo
Aug 28 '16 at 23:36
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How can I parse a YAML file from a Linux shell script?
...ing started"
output_file="yes"
it also understands yaml files, generated by ruby which may include ruby symbols, like:
---
:global:
:debug: 'yes'
:verbose: 'no'
:debugging:
:detailed: 'no'
:header: debugging started
:output: 'yes'
and will output the same as in the previous exam...
Difference between a class and a module
I came from Java, and now I am working more with Ruby.
9 Answers
9
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In Ruby on Rails, how do I format a date with the “th” suffix, as in, “Sun Oct 5th”?
....day.ordinalize}")
=> "Fri Oct 3rd"
Note, if you are using IRB with Ruby 2.0, you must first run:
require 'active_support/core_ext/integer/inflections'
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delete_all vs destroy_all?
... / destroy_all: The associated objects are destroyed alongside this object by calling their destroy method
delete / delete_all: All associated objects are destroyed immediately without calling their :destroy method
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Capturing multiple line output into a Bash variable
...eates a potentially very long single line of output with 'words' separated by single spaces (where a 'word' is a sequence of non-whitespace characters; there needn't be any alphanumerics in any of the words).
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