Type classes vs algebraic data types?
来源： https://stackoverflow.com/questions/47534671/type-classes-vs-algebraic-data-types
haskell
Type classes vs algebraic data types?
来源： https://stackoverflow.com/questions/47534671/type-classes-vs-algebraic-data-types
boolean operators over multiple elements
来源： https://stackoverflow.com/questions/12654042/boolean-operators-over-multiple-elements
boolean operators over multiple elements
来源： https://stackoverflow.com/questions/12654042/boolean-operators-over-multiple-elements
操作DOM
1, 操作一个dom节点其实就4个操作： 更新：更新该DOM节点的内容，相当于更新了该DOM节点表示的HTML的内容； 遍历：遍历该DOM节点下的子节点，以便进行进一步操作； 添加：在该DOM节点下新增一个子节点，相当于动态增加了一个HTML节点； 删除：将该节点从HTML中删除，相当于删掉了该DOM节点的内容以及它包含的所有子节点。 2， 获取节点方法 第一种方法： // 返回ID为'test'的节点： var test = document.getElementById('test'); // 先定位ID为'test-table'的节点，再返回其内部所有tr节点： var trs = document.getElementById('test-table').getElementsByTagName('tr'); // 先定位ID为'test-div'的节点，再返回其内部所有class包含red的节点： var reds = document.getElementById('test-div').getElementsByClassName('red'); // 获取节点test下的所有直属子节点: var cs = test.children; // 获取节点test下第一个、最后一个子节点： var first = test.firstElementChild; var
Generating finite lists of primes in Haskell
来源： https://stackoverflow.com/questions/63596587/generating-finite-lists-of-primes-in-haskell
Generating finite lists of primes in Haskell
来源： https://stackoverflow.com/questions/63596587/generating-finite-lists-of-primes-in-haskell
How does sequenceA work on lists of pairs?
来源： https://stackoverflow.com/questions/64177058/how-does-sequencea-work-on-lists-of-pairs
How does sequenceA work on lists of pairs?
来源： https://stackoverflow.com/questions/64177058/how-does-sequencea-work-on-lists-of-pairs
If Either can be either Left or Right but not both, then why does it correspond to OR instead of XOR in Curry-Howard correspondence?
来源： https://stackoverflow.com/questions/64394487/if-either-can-be-either-left-or-right-but-not-both-then-why-does-it-correspond