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Update MongoDB field using value of another field
In MongoDB, is it possible to update the value of a field using the value from another field? The equivalent SQL would be something like:
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MySQL COUNT DISTINCT
I'm trying to collect the number of distinct visits in my cp yesterday, then count them.
3 Answers
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Structs in Javascript
...ference between object literals and constructed objects are the properties inherited from the prototype.
var o = {
'a': 3, 'b': 4,
'doStuff': function() {
alert(this.a + this.b);
}
};
o.doStuff(); // displays: 7
You could make a struct factory.
function makeStruct(names) {
var name...
Multiple actions were found that match the request in Web Api
I keep getting this error when I try to have 2 "Get" methods
18 Answers
18
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LEFT OUTER joins in Rails 3
I have the following code:
8 Answers
8
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Detecting which UIButton was pressed in a UITableView
I have a UITableView with 5 UITableViewCells . Each cell contains a UIButton which is set up as follows:
26 Answers
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.NET unique object identifier
Is there a way of getting a unique identifier of an instance?
11 Answers
11
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Selecting element by data attribute
..."]');
You should be able to omit the *, but if I recall correctly, depending on which jQuery version you’re using, this might give faulty results.
Note that for compatibility with the Selectors API (document.querySelector{,all}), the quotes around the attribute value (22) may not be omitted in ...
How to generate random SHA1 hash to use as ID in node.js?
I am using this line to generate a sha1 id for node.js:
4 Answers
4
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Converting JSON data to Java object
I want to be able to access properties from a JSON string within my Java action method. The string is available by simply saying myJsonString = object.getJson() . Below is an example of what the string can look like:
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