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Find rows with multiple duplicate fields with Active Record, Rails & Postgres
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Tested & Working Version
User.select(:first,:email).group(:first,:email).having("count(*) > 1")
Also, this is a little unrelated but handy. If you want to see how times each combination was found, put .size at the e...
How can I get current location from user in iOS
...tus] != kCLAuthorizationStatusAuthorizedAlways
) {
// Will open an confirm dialog to get user's approval
[_locationManager requestWhenInUseAuthorization];
//[_locationManager requestAlwaysAuthorization];
} else {
[_locationManager startUpdatingLocation]; //Will update location ...
What would be an alternate to [TearDown] and [SetUp] in MSTest?
When I use MSTest Framework, and copy the code that Selenium IDE generated for me, MSTest doesn't recognize [TearDown] and [SetUp] . What is the alternative to this?
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How do you print in a Go test using the “testing” package?
I'm running a test in Go with a statement to print something (i.e. for debugging of tests) but it's not printing anything.
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Including JavaScript class definition from another file in Node.js
... way in addition to the ones provided here for ES6
module.exports = class TEST{
constructor(size) {
this.map = new MAp();
this.size = size;
}
get(key) {
return this.map.get(key);
}
length() {
return this.map.size;
}
}
and include the...
List of Big-O for PHP functions
...ose who doubt that PHP array lookups are O(N), I've written a benchmark to test that (they are still effectively O(1) for most realistic values).
$tests = 1000000;
$max = 5000001;
for( $i = 1; $i <= $max; $i += 10000 ) {
//create lookup array
$array = array_fill( 0, $i, NULL );
...
Does Eclipse have line-wrap
...5, for release mid 2016). In any editor view, type:
Alt+Shift+Y
(Sadik confirms in the comments it works with Eclipse 2019-09)
By default, text editors are opened with word wrap disabled.
This can be changed with the Enable word wrap when opening an editor option on the General > Editor...
How to get the last value of an ArrayList
...x>) just results in a constant-time retrieve from an array. (JDK source confirms this) For other list implementations, this isn't guaranteed, so for example, LinkedList has a getLast() method which is constant-time.
– Peter
Mar 19 '15 at 19:58
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How do I start a program with arguments when debugging?
...eters. When it's written like this, you can just simply write down all the test cases you want to check and just toggle the comments on each to activate it. Much faster and proves especially useful if you're suddenly in front of a Visual Studio in a different language (not the one you are used to wo...
“Conversion to Dalvik format failed with error 1” on external JAR
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Windows 7 Solution:
Confirmed the problem is caused by ProGuard command line in the file
[Android SDK Installation Directory]\tools\proguard\bin\proguard.bat
Edit the following line will solve the problem:
call %java_exe% -jar "%PROGUARD_HO...