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Retrieve only the queried element in an object array in MongoDB collection
... returned document to contain only the first matched shapes element:
db.test.find(
{"shapes.color": "red"},
{_id: 0, shapes: {$elemMatch: {color: "red"}}});
Returns:
{"shapes" : [{"shape": "circle", "color": "red"}]}
In 2.2 you can also do this using the $ projection operator, where...
Measuring the distance between two coordinates in PHP
...ons possible, this version implements the formula in Wikipedia and is well tested. The $angle means the angle in the middle of the world in radians, so one can multiplicate it with the earth radius. I can also provide an example of the more complex Vincenty formula if someone is interested.
...
Rename a dictionary key
...or python 3.5, I think dict.pop is workable for an OrderedDict based on my test.
– Daniel
Dec 5 '17 at 13:30
6
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How do I check if string contains substring? [duplicate]
...an write
if (str.toLowerCase().indexOf("yes") >= 0)
Or:
if (/yes/i.test(str))
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How can I dynamically add a directive in AngularJS?
... the $compile service is actually super simple in this case:
.directive( 'test', function ( $compile ) {
return {
restrict: 'E',
scope: { text: '@' },
template: '<p ng-click="add()">{{text}}</p>',
controller: function ( $scope, $element ) {
$scope.add = function ...
Why can't enum's constructor access static fields?
...tialized in the order in which they appear in code. For e.g.
public class Test4 {
private static final Test4 test4 = new Test4();
private static int j = 6;
Test4() {
System.out.println(j);
}
private static void test() {
}
public st...
How to select different app.config for several build configurations
I have a dll-type project that contains MSTest integration tests. On my machine the tests pass, and I want the same to happen on a CI server (I use TeamCity). But the tests fail, because I need to tweak some settings in app.config. This is why I was thinking to have a separate second app.config fi...
How can query string parameters be forwarded through a proxy_pass with nginx?
...
Complained how? I just tested it on nginx 1.3.4 and it worked fine for me.
– kolbyjack
Aug 24 '12 at 11:48
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val() vs. text() for textarea
...xt for IE) method to get the contents of a <textarea>. The following test cases illustrate how text() and .val() relate to each other:
var t = '<textarea>';
console.log($(t).text('test').val()); // Prints test
console.log($(t).val('too').text('test').val()); // Prints too
c...
What is std::promise?
... on the future will raise a "broken promise" exception.
Here is a little test series to demonstrate these various exceptional behaviours. First, the harness:
#include <iostream>
#include <future>
#include <exception>
#include <stdexcept>
int test();
int main()
{
try
...