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Generate a random number in the range 1 - 10
...y numbers between 1 and 10 you mean any float that is >= 1 and < 10, then it's easy:
select random() * 9 + 1
This can be easily tested with:
# select min(i), max(i) from (
select random() * 9 + 1 as i from generate_series(1,1000000)
) q;
min | max
-----------------+-...
Need to reset git branch to origin version
...ithub). Is there an easy way to do this? I tried deleting the branch and then resetting up the tracking branch, but it just gives me the version I was working on again.
...
Update a table using JOIN in SQL Server?
...CommonField = S."Common Field"
AND T.BatchNo = '110'
WHEN MATCHED THEN
UPDATE
SET CalculatedColumn = S."Calculated Column";
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Generate a random point within a circle (uniformly)
...rejection sampling.
t = 2*pi*random()
u = random()+random()
r = if u>1 then 2-u else u
[r*cos(t), r*sin(t)]
Here it is in Mathematica.
f[] := Block[{u, t, r},
u = Random[] + Random[];
t = Random[] 2 Pi;
r = If[u > 1, 2 - u, u];
{r Cos[t], r Sin[t]}
]
ListPlot[Table[f[], {10000}], ...
How to import a single table in to mysql database using command line
...if you need to use an existing SQL file, and use a specific table from it, then this perl script in the TimeSheet blog, with enable you to extract the table to a separate SQL file, and then import it.
The original link is dead, so it is a good thing that someone has put it instead of the author, Jar...
Can I safely delete contents of Xcode Derived data folder?
...e
alias purgeallbuilds='rm -rf ~/Library/Developer/Xcode/DerivedData/*'
Then in terminal, I type purgeallbuilds, and all subfolders of DerivedData are deleted.
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Do sessions really violate RESTfulness?
...t, a session cookie is exactly the same as any
other HTTP header based authentication mechanism, except that it uses
the Cookie header instead of the Authorization or some other
proprietary header.
By session cookies you store the client state on the server and so your request has a context....
Passing arrays as parameters in bash
...n use an eval for the keys, for example:
eval local keys=(\${!$1})
and then a loop using them to create a copy.
Note: here ! is not used it's previous indirect/double evaluation, but rather in array context it returns the array indices (keys).
and, of course, if we were to pass descTable and o...
How to load json into my angular.js ng-model?
...er('TodoCtrl', function($scope, $http) {
$http.get('todos.json')
.then(function(res){
$scope.todos = res.data;
});
});
The get method returns a promise object which
first argument is a success callback and the second an error
callback.
When you add $http...
SQL - Update multiple records in one query
... SET config_value = CASE config_name
WHEN 'name1' THEN 'value'
WHEN 'name2' THEN 'value2'
ELSE config_value
END
WHERE config_name IN('name1', 'name2');
Here is SQLFiddle demo
...