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How to start two threads at “exactly” the same time

.... // Now if we block on the gate from the main thread, it will open // and all threads will start to do stuff! gate.await(); System.out.println("all threads started"); This doesn't have to be a CyclicBarrier, you could also use a CountDownLatch or even a lock. This still can't make sure that ...
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How to return an empty ActiveRecord relation?

... Docs: api.rubyonrails.org/classes/ActiveRecord/… – Jared Beck Jan 15 '14 at 5:07 2 ...
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How to test equality of Swift enums with associated values

...d values. So if you're on Swift 4.1 or newer, the following will automatically synthesize the necessary methods such that XCTAssert(t1 == t2) works. The key is to add the Equatable protocol to your enum. enum SimpleToken: Equatable { case Name(String) case Number(Int) } let t1 = SimpleToke...
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Maven fails to find local artifact

Occasionally maven complains that a particular dependency, which is built and packaged locally, cannot be found in the local repository while building another project that has it as a dependency. We get an error like: ...
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How to create a GUID/UUID in Python

... Also, have a look at the shortuuid module I wrote, as it allows you to generate shorter, readable UUIDs: github.com/stochastic-technologies/shortuuid – Stavros Korokithakis Dec 31 '12 at 16:22 ...
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Changing element style attribute dynamically using JavaScript

...o style.setProperty function: https://developer.mozilla.org/en-US/docs/Web/API/CSSStyleDeclaration/setProperty document.getElementById("xyz").style.setProperty('padding-top', '10px'); // version with !important priority document.getElementById("xyz").style.setProperty('padding-top', '10px', 'impor...
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Java “lambda expressions not supported at this language level”

...: android { compileOptions { sourceCompatibility JavaVersion.VERSION_1_8 targetCompatibility JavaVersion.VERSION_1_8 } } – BaDo Sep 25 '15 at 2:30 ...
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Updating MySQL primary key

I have a table user_interactions with 4 columns: 3 Answers 3 ...
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Getting the name of a variable as a string

... OK, finally got it! Installed using the following pip3 install python-varname==0.1.5; imported using from varname import nameof – enter_display_name_here Jun 6 at 2:42 ...
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How to store Node.js deployment settings/configuration files?

...": "2.2.0" } When I clone the project to my local machine, I run npm install to install the packages. More info on that here. The project is stored in GitHub, with remotes added for my production server. share | ...