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Presentation from JVMLS 2015 One bottleneck in the Nashorn JavaScript engine is startup time. Nashorn, as it works currently in Java 8, JITs everything to Java bytecode, accruing overhead in code generation and class installation. Nashorn in Java 9, can in unfortunate cases, increase this compilation workload significantly, as the new optimistic type system, which has greatly increased steady stat
JavaScript OOP is baffling: on one hand, there is a simple core, on the other hand, there are some really weird things going on. I’ve been pondering for a long time how to explain it well and I think the best way to do so is via four layers: single objects, prototype chains, constructors, constructor inheritance. The first two layers are JavaScript’s simple OOP core, layers 3 and 4 are where the c
TSConfig Solution Style & subpath imports to switch types on a per-file basis
The document covers modern JavaScript application development, focusing on achieving well-structured code through various methods such as object-oriented programming, module patterns, and MVC frameworks. It discusses key principles like dependency management, design patterns, and the importance of separating concerns in code structure while highlighting patterns for creating scalable and maintaina
technical and social progress toward ECMAScript 6 at facebook Ben Newman (Facebook) NodeJS @ Pivotal Labs 19 March 2014 { github, twitter, instagram, facebook }.com/benjamn Wikipedia titlecapitalization.com We have the opportunity, as technologists, to make certain kinds of problems disappear forever. “We should have been doing it this way all along!” GitHub is strewn with better ways of doing thi
As organizations navigate the AI revolution, the traditional boundaries between data infrastructure and AI systems are blurring. This session explores the critical convergence point where data management meets machine intelligence, examining how this intersection is reshaping enterprise technology stacks. Our keynote panelists bring complementary perspectives from operating and investing in this r
Callbacks, promises, generators - asynchronous javascript This document discusses callbacks, promises, and generators for handling asynchronous code in JavaScript. It begins by explaining callbacks and the issues they can cause like "callback hell". It then introduces promises as an alternative using libraries like Q that allow chaining asynchronous operations together. Generators are also covered
By @johnkpaul Who? John K. Paul Penton Media I ♥ JavaScript @johnkpaul john@johnkpaul.com johnkpaul.com ECMAScript 6 a hell of a long time coming ES3 - 1999 ES5 - 2009 ES6 - 2014...? But who cares about dates? block scoped variables array comprehensions template strings generators/iterators destructuring assignment block scoped variables Run var arr = [1,2,3]; var o = []; for(var i = 0; i<arr.leng
This document contains links to MongoDB documentation pages about sharding, databases, collections, inserting, querying, updating, indexing, replication, and backups. It includes a link to a slideshare presentation on MongoDB sharding and links to pages explaining replica set internals and operations.
power-assert を作るきっかけ アサーション失敗時の情報量を大幅に増やすことができるPower Assertの系譜 - Togetterまとめ chai/should/expect.js 覚えること多くて煩わしい 自分で作ろうと思い立った(2013/01/08) AST 変換 power-assert は最初から AST 変換で実現しようと考えていた Groovy の Power Assert が AST 変換を行っているらしいことは何となく知っていた Groovy 1.7 Power Assert パワーアサート(Power Assert)の真の意味 Groovy 1.7のキモはAST変換である 実装を見てはいないので、 Groovy の Power Assert が最近 AST 変換を行っていないらしいことは知らなかった…!
https://github.com/teppeis/closure-ts We need KATA! 異論は認めない。 There are many Typed-AltJS. M社 G社 D社 H Typed-AltJS requires a typed library. 静的型付け指向ではないライブラリに型定義を与えて使っても型の力は活かせない(古くてごめん) Closure Library! 現存する唯一のフルスタック静的型付けJSライブラリ(当社調べ) closure-ts: Use Closure Library in TypeScript Closure LibraryのJSDocとコードをDoctrineとEsprimaでパースしてTypeScript用の型定義ファイル(d.ts)を吐き出す。 まだ昨日数時間実装しただけのPoCレベル いくつかのファイルは生成に成功 オリジナ
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