You signed in with another tab or window. Reload to refresh your session.You signed out in another tab or window. Reload to refresh your session.You switched accounts on another tab or window. Reload to refresh your session.Dismiss alert
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
To implement an efficient PubSub (Publish-Subscribe) system in JavaScript, use a Map-based structure to manage subscribers. This approach ensures optimal performance for both subscribing/unsubscribing (O(1) complexity) and publishing (O(n) complexity, unavoidable). Here's the implementation:
Efficient PubSub Implementation
classPubSub{constructor(){this.events=newMap();// Event -> Subscribers (Map: ID -> Callback)}subscribe(event,callback){
how come the tokyo sarin attack plans werent discovered by police before they happened?
The failure of Japanese authorities to discover the Tokyo sarin attack plans before they occurred can be attributed to a combination of institutional, legal, and cultural factors, as well as the covert tactics employed by the Aum Shinrikyo cult. Here’s a detailed analysis:
1. Institutional Underestimation and Delayed Investigations
Aum Shinrikyo had already conducted multiple violent acts prior to the 1995 attack, including the 1994 Matsumoto sarin attack (7 deaths) and the murder of a lawyer and his family in 1989. However, police investigations into these incidents were slow and fragmented, with authorities failing to connect them conclusively to Aum until after the Tokyo attack . Despite forensic evidence linking Aum to the Matsumoto attack (e.g., sarin traces near cult facilities), bureaucratic inertia and a lack of interagency coordination delayed decisive action .
The internet landscapes of San Francisco (SF) and New York City (NYC) reflect their distinct technological priorities and infrastructural challenges. Here’s a detailed comparison based on the latest trends and data:
1. Fiber Infrastructure
NYC:
NYC has made significant strides in fiber-to-the-home (FTTH) deployment, with 76.5 million U.S. homes now passed by fiber nationally, and NYC leading in urban adoption due to competitive market dynamics and investments from providers like Verizon Fios . Fiber is prioritized for its reliability and capacity, with 65% of users considering it the best connectivity option . NYC’s dense urban environment supports widespread fiber deployment, and its startup ecosystem (ranked second globally) benefits from this infrastructure .
SF/Silicon Valley:
While SF is part of the broader Bay Area fiber network, its focus has shifted toward capacity-driven fiber infrastructure to support data centers, AI, and machine learning applications . The
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters