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How to retrieve POST query parameters?
...
Then, in your handler, use the req.body object:
// assuming POST: name=foo&color=red <-- URL encoding
//
// or POST: {"name":"foo","color":"red"} <-- JSON encoding
app.post('/test-page', function(req, res) {
var name = req.body.name,
color = req.body.colo...
How to insert an element after another element in JavaScript without using a library?
...ement("span");
el.innerHTML = "test";
var div = document.getElementById("foo");
insertAfter(div, el);
<div id="foo">Hello</div>
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Breaking out of a nested loop
...
{
for (int j = 0; j < 100; j++)
{
goto Foo; // yeuck!
}
}
Foo:
Console.WriteLine("Hi");
vs:
// anon-method
Action work = delegate
{
for (int x = 0; x < 100; x++)
{
for (int y = 0; y < 100; y++)
{
return;...
Replace multiple strings with multiple other strings
... str;
}
//testing...
var str = "bat, ball, cat";
var map = {
'bat' : 'foo',
'ball' : 'boo',
'cat' : 'bar'
};
var new = replaceAll(str, map);
//result: "foo, boo, bar"
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HTTP GET Request in Node.js Express
...rest')
// GET a resource
unirest.get('http://httpbin.org/get')
.query({'foo': 'bar'})
.query({'stack': 'overflow'})
.end(function(res) {
if (res.error) {
console.log('GET error', res.error)
} else {
console.log('GET response', res.body)
}
})
// POST a form with an a...
Why does X[Y] join of data.tables not allow a full outer join, or a left join?
... in data.table does all that in one step for
you. When you write X[Y,sum(foo*bar)], data.table automatically inspects the j expression to see which columns it uses. It will only subset those columns only; the others are ignored. Memory is only created for the columns the j uses, and Y columns enjo...
Changing variable names in Vim
...n a small change.
My end change looks something like this
:'a,'bs/\<foo\>/bar
I would love to be wrong about there not being a refactoring tool for VIM but I haven't seen it.
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i...
Determine if a function exists in bash
...function, external command, or just not defined. Example:
$ LC_ALL=C type foo
bash: type: foo: not found
$ LC_ALL=C type ls
ls is aliased to `ls --color=auto'
$ which type
$ LC_ALL=C type type
type is a shell builtin
$ LC_ALL=C type -t rvm
function
$ if [ -n "$(LC_ALL=C type -t rvm)" ] &&a...
Big O, how do you calculate/approximate it?
... < 2*n; i += 2) { // 1
for (j=n; j > i; j--) { // 2
foo(); // 3
}
}
The first thing you needed to be asked is the order of execution of foo(). While the usual is to be O(1), you need to ask your professors about it. O(1) means (almost, mostly) constant C...
Stored procedure slow when called from web, fast from Management Studio
...null)
begin
select @dateTo = GETUTCDATE()
end
select foo
from dbo.table
where createdDate < @dateTo
end
After I changed it to
create procedure dbo.procedure
@dateTo datetime = null
begin
declare @to datetime = coalesce(@dateTo, getutcdate())
select fo...