Apply a Function Over a Ragged Array对不规则阵列使用函数 tapply(X, INDEX, FUN = NULL, ..., simplify = TRUE) eapply Apply a Function Over Values in an Environment对环境中的值使用函数 eapply(env, FUN, ..., all.names = FALSE, USE.NAMES = TRUE) mapply Apply a Function to Multiple ...
lapply函数的包装版。该函数返回值为向量、矩阵,如果simplify=”array”,且合适的情况下,将会通过simplify2array()函数转换为阵列。 sapply(x, f, simplify=FALSE, USE.NAMES=FALSE)返回的值与lapply(x,f)是一致的。 sapply(X, FUN, …, simplify = TRUE, USE.NAMES = TRUE) 1. as.list强制转换为list s...
AI代码解释 x<-array(1:48,c(4,3,4)),,1[,1][,2][,3][1,]159[2,]2610[3,]3711[4,]4812,,2[,1][,2][,3][1,]131721[2,]141822[3,]151923[4,]162024,,3[,1][,2][,3][1,]252933[2,]263034[3,]273135[4,]283236,,4[,1][,2][,3][1,]374145[2,]384246[3,]394347[4...
function clone(obj, isDeep) { if(typeof obj !== 'object') { throw new Error('clone: the arguments[0] should be an object'); } const newObj = obj instanceof Array ? [] : {}; Object.keys(obj).forEach(key => { if(isDeep && typeof obj[key] === 'object'...
operation ApplyToEachIndexC<'T> (singleElementOperation : ((Int, 'T) => Unit is Ctl), register : 'T[]) : Unit is Ctl InputsingleElementOperation : (Int,'T) => Unit is Ctl Operation to apply to each qubit.register : 'T[]Array of qubits on which to apply the given operation.Ou...
tapply() computes a measure (mean, median, min, max, etc..) or a function for each factor variable in a vector. It is a very useful function that lets you create a subset of a vector and then apply some functions to each of the subset.tapply 和上面的三个就有点不同了，tapply可以将...
#求rank: Provide the rank of values within each group.# 提供每个组中值的等级。gb.rank().head() 1.2. 使用transform方法 当用自定义变换时需要使用transform方法,被调用的自定义函数,与agg的传入类型是一致的,其最后的返回结果是行列索引与数据源一致的DataFrame。
Event.prototype.emit=function() {varargs =arguments;this.handlers.forEach(function(handler) { handler.apply(null, args);//null改成 this、that好像没差}); };varevent=newEvent(); function f() { f.calls= (f.calls ||0) +1; f.args=Array.prototype.slice.call(arguments); ...
I have an array of three numbers: [min, mid, max], and I want to apply different validation function(s) to each element of the array. I don’t quite know how to achieve this with Yup. Example use cases: min: no validation; mid: validate t...
var toStr = Function.prototype.call.bind(Object.prototype.toString); function isArray(obj){ return toStr(obj) === '[object Array]'; } isArray([1, 2, 3]); // true // 使用改造后的 toStr toStr([1, 2, 3]); // "[object Array]" ...