}//ForLoop方法__blockintsum =0;doubledate_s =CFAbsoluteTimeGetCurrent();for(inti =0; i < test.count; i ++) { sum+=[test[i] integerValue]; }doubledate_current = CFAbsoluteTimeGetCurrent() -date_s; NSLog(@"Sum : %d ForLoop Time: %f ms",sum,date_current *1000);//For - in...
这里的numbers是数组的名称,你可以根据实际需求来命名数组。 使用for循环遍历数组 接下来,我们使用for循环来遍历数组中的每个元素。在Swift中,我们可以使用以下代码来进行for循环: fornumberinnumbers{// 在这里执行你想要的操作} 1. 2. 3. 在这段代码中,我们使用关键字for和一个临时变量number来定义一个for循环。
fruits.forEach(asyncvalue => {constelement =awaitgetFruit(value);console.log(element); });console.log("foreach loop end ..."); })();//同时输出foreach loop start ... foreach loop end ...//间隔2s 后同时输出下面3个apple grape pear 示例地址...
#include <cstdio> #include <cstdlib> #include <iostream> using namespace std; int main(int nNumberofArgs, char* pszArgs[]) { cout << "The primes less than 20 are:" << endl; for(int n : {1, 2, 3, 5, 7, 11, 13, 17, 19}) {//from w ww .ja va 2 s.c o m cout...
vector<int> v1(begin(arr), end(arr)); vector<int> v2(arr->begin(), arr->end()); // Initialize a vector one element at a time. // using a range for loop. Not as efficient as using begin/end. vector<int> v3; for(int i : arr) { v3.push_back(i); } } 下...
再看forEach, 注意forEach调用后直接返回输出 loop end, 间隔2s 后同时输出了后面结果,并没有按预期各个间隔输出。 (asyncfunction(){console.log("foreach loop start ...");fruits.forEach(asyncvalue=>{constelement=awaitgetFruit(value);console.log(element);});console.log("foreach loop end ...")...
Withloop Honestly, I've been using array methods so long, I'll need a second to rewrite this as a for loop. So... one sec... Ok, here you go: constcommands=[]for(letindex=0;index<lines.length;index++) {constline=lines[index]constfile=line.trim()if(file) {constdestFile=getDest...
甚至这种基于范围的循环(Range-based for loop[1])写法,包括 C 风格的数组也支持,非常方便。不用...
JavaScript supports the classic C-style for statement. It uses an auxiliary counter variable to traverse the array. A for loop has three phases: initialization, condition and code block execution, and incrementation. classic_for.js let words = ['pen', 'pencil', 'falcon', 'rock', 'sky',...
for j in range(a.shape[1]): print(a[j,i]) 1. 2. 3. 默认创建数组的顺序为’c’,默认迭代元素顺序也是’C‘,通过显示的使用order='F'可以改变迭代顺序。 2) 数组迭代 默认迭代返回的是单个元素,使用参数flags = ['external_loop']将返回值变为数组,order='C'时,返回值压缩为一维数组,order='F...