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How do you query for “is not null” in Mongo?
..., the query returns only the documents that do not contain the field.
$ne selects the documents where the value of the field is not equal to the specified value. This includes documents that do not contain the field.
So in your provided case following query going to return all the documents with i...
Is it Linq or Lambda?
...= from item in _List
where item.Value == 1
select item;
This is also LINQ (using method syntax):
var _Results = _List.Where(x => x.Value == 1);
It's interesting to note that both of these flavors will end up producing the exact same code. The compiler offers y...
Get fragment (value after hash '#') from a URL in php [closed]
How can i select the fragment after the '#' symbol in my URL using PHP?
The result that i want is "photo45".
10 Answers
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How do I stop a Git commit when VI is on the screen waiting for a commit message?
...s not beginning with a #) for example by holding v and using arrow keys to select it and then pressing Delete. Quit with :wq to apply changes! If you use :q! the changes will be lost and the previous commit message will be used.
When using VIM it's ok in both cases to quit with :cq - VIM will quit...
What are the differences between numpy arrays and matrices? Which one should I use?
...nces between matrix objects and ndarrays
(having to do with np.ravel, item selection and sequence behavior).
The main advantage of numpy arrays is that they are more general than
2-dimensional matrices. What happens when you want a 3-dimensional array? Then
you have to use an ndarray, not a matrix ...
How to get folder path for ClickOnce application
...ocation, you can just run the app, open the task manager (CTRL-SHIFT-ESC), select the app and right-click|Open file location.
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Can Powershell Run Commands in Parallel?
...tblock] {param($system) gwmi win32_operatingsystem -ComputerName $system | select csname,caption}
$servers = Get-Content servers.txt
$rtn = Invoke-Async -Set $server -SetParam system -ScriptBlock $sb
just cmdlet/function
$servers = Get-Content servers.txt
$rtn = Invoke-Async -Set $servers ...
How can I expand and collapse a using javascript?
... I will get rid of it and just use a border. This is excellent because it selects the div to expand relative to the header I've clicked, which is important because of the fact that I may have several different numbers of listed items depending on user settings and other factors.
...
Naming of enums in Java: Singular or Plural?
...ably enums in general) should be singular. The thinking is that you're not selecting multiple Protocols, but rather one Protocol of the possible choices in the list of values.
Note the absence of plurals: http://docs.oracle.com/javase/tutorial/java/javaOO/enum.html
...
JavaScript post request like a form submit
...
This would be a version of the selected answer using jQuery.
// Post to the provided URL with the specified parameters.
function post(path, parameters) {
var form = $('<form></form>');
form.attr("method", "post");
form.attr("actio...