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How to change column datatype from character to numeric in PostgreSQL 8.4
...ending on your data):
alter table presales alter column code type numeric(10,0) using code::numeric;
-- Or if you prefer standard casting...
alter table presales alter column code type numeric(10,0) using cast(code as numeric);
This will fail if you have anything in code that cannot be cast to nu...
Why would a post-build step (xcopy) occasionally exit with code 2 in a TeamCity build?
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147
Even if you provide the /Y switch with xcopy, you'll still get an error when xcopy doesn't kno...
Combine two ActiveRecord::Relation objects
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edited Jul 8 '19 at 6:08
answered Mar 2 '12 at 21:55
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Spring: how do I inject an HttpServletRequest into a request-scoped bean?
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115
Request-scoped beans can be autowired with the request object.
private @Autowired HttpServlet...
Set a default parameter value for a JavaScript function
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From ES6/ES2015, default parameters are in the language specification.
function read_file(file, delete_after = false) {
// Code
}
just works.
Reference: Default Parameters - MDN
Default function parameters allow formal parameter...
What is Python buffer type for?
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146
An example usage:
>>> s = 'Hello world'
>>> t = buffer(s, 6, 5)
>>>...
How do I automatically update a timestamp in PostgreSQL
...ULT value:
CREATE TABLE users (
id serial not null,
firstname varchar(100),
middlename varchar(100),
lastname varchar(100),
email varchar(200),
timestamp timestamp default current_timestamp
)
Note that the value for that column can explicitly be overwritten by supplying a value in the...
Real mouse position in canvas [duplicate]
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The Simple 1:1 Scenario
For situations where the canvas element is 1:1 compared to the bitmap size, you can get the mouse positions by using this snippet:
function getMousePos(canvas, evt) {
var rect = canvas.getBoundingClientRect...
Is there a “vim runtime log”?
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169
running vim with the -V[N] option will do a pretty hefty runtime log, here N is the debug leve...
Git: Recover deleted (remote) branch
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103
I'm not an expert. But you can try
git fsck --full --no-reflogs | grep commit
to find the H...