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Adding a new SQL column with a default value
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Try this:
ALTER TABLE table1 ADD COLUMN foo INT DEFAULT 0;
From the documentation that you linked to:
ALTER [ONLINE | OFFLINE] [IGNORE] TABLE tbl_name
alter_specification [, alter_specification] ...
alter_specification:
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ADD [COLUMN] (col_name column_definition,...)
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Rails respond_with: how does it work?
...into ActionController::Base, the class your ApplicationController inherits from. Then there is ActionController::Responder which provides the default behavior when using respond_with.
By default, the only behavior rails provides in the response is an implicit attempt to render a template with a n...
Determine the path of the executing BASH script [duplicate]
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Within bash you can also use $BASH_SOURCE. From this post.
– JamesThomasMoon1979
May 1 '13 at 17:10
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How to loop through file names returned by find?
... shell expansion in bash and as a result of that x=$(find . -name "*.txt") from the question is not recommended at all. If find gets a filename with spaces e.g. "the file.txt" you will get 2 separated strings for processing, if you process x in a loop. You can improve this by changing delimiter (bas...
Do I need a content-type header for HTTP GET requests?
...ontent-Type" is part of the representation (i.e. payload) metadata. Quoted from
RFC 7231 section 3.1:
3.1. Representation Metadata
Representation header fields provide metadata about the
representation. When a message includes a payload body, the
representation header fields describe how to inter...
What is the purpose of `text=auto` in `.gitattributes` file?
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From the docs:
Each line in .gitattributes (or .git/info/attributes) file is of form:
pattern attr1 attr2 ...
So here, the pattern is *, which means all files, and the attribute is text=auto.
What does text=auto do?...
Extracting substrings in Go
I'm trying to read an entire line from the console (including whitespace), then process it. Using bufio.ReadString, the newline character is read together with the input, so I came up with the following code to trim the newline character:
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How do you connect localhost in the Android emulator? [duplicate]
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But you need to change API from "localhost:port" to "127.0.0.1:port" first. after that, Use 10.0.2.2 to access your actual machine.
– binhtruong.it
Dec 9 '18 at 11:49
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jar not loaded. See Servlet Spec 2.3, section 9.7.2. Offending class: javax/servlet/Servlet.class
... jar version. Use mvn dependency:tree to find where this servlet jar comes from, and add an exclusion.
– JB Nizet
Mar 25 '13 at 8:07
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Reordering of commits
... rebase again (non-interactively):
# create a temporary branch
git branch fromAtoB branchA
# move branchA back two commits
git branch -f branchA branchA~2
# rebase those two commits onto branchB
git rebase --onto branchB branchA fromAtoB
# merge (fast-forward) these into branchB
git checkout branch...