foreach

Process optimisation of code within dopar

由 独自空忆成欢 提交于 2020-03-26 04:03:42
问题 I am trying to optimize my code to run glms multiple times, and I would like to leverage parallelization, either with foreach or some other more efficient way. As you can see; the for loop takes about 800 secs to run 270000 glms; while foreach with dopar unintuitively takes for ever (It either crashes or I force it to stop after a couple of hours). Thanks for your help. Jinesh library(data.table) library(parallel) library(doParallel) library(foreach) scen_bin <- expand.grid(n = c(10, 20, 30),

Semicolon after foreach statement has “interesting” result. Why?

由 不羁的心 提交于 2020-03-20 03:17:11
问题 Just had an AHA! moment with adding a ; after a foreach loop by accident. Funnily this didn't throw an error, but skipped(?) everything in the loops array and just touches the last element. Test code: $test_array = array( 'a' => 'one', 'b' => 'two', 'c' => 'three' ); foreach ( $test_array as $key => $val ); echo $val; Question: Why does this happen? 回答1: A semicolon ends the statement and a foreach statement is similar to a function - it opens up a scope. If you do not open up a multi-line

PHP Foreach loop too slow when applied on large arrays

由 纵饮孤独 提交于 2020-03-05 04:39:07
问题 So, basically, i have to loop thought an array of 25000 items, then compare each item with another array's ID and if the ID's from the first array and the second match then create another array of the matched items. That looks something like this. foreach ($all_games as $game) { foreach ($user_games_ids as $user_game_id) { if ($user_game_id == $game["appid"]) { $game_details['title'][] = $game["title"]; $game_details['price'][] = $game["price"]; $game_details['image'][] = $game["image_url"];

Iterate through multiple arrays in powershell script

由 断了今生、忘了曾经 提交于 2020-03-05 00:23:35
问题 I am attempting to use multiple arrays to pass multiple server names, and maybe other elements, that maybe be needed in conjunction to each other to a function's set of Parameters in a Powershell function. While using a single loop, if that is even possible. I wanted to script this process so you could pass an array via a parameter as a larger function to the 2nd function but use arrays. Instead of nested Hashtable. This is similar to what i was attempting to do but I cant seem to get the

Why does Google script for each run differently for range in a row vs range in a column

由 淺唱寂寞╮ 提交于 2020-03-03 07:30:27
问题 I am trying to create a list of tabs based on values in a row, as I have previously done with values in a column (The script here is an example test as I was trying to identify the issue, not the actual script used). However, the forEach() function is working differently and I do not understand why. Below I will append two sets of scripts and their results. For column : var app = SpreadsheetApp; var ss = app.getActiveSpreadsheet(); var sheet = ss.getActiveSheet(); var range = sheet.getRange(1

how to foreach an array variable created with recursive function in Smarty

由 跟風遠走 提交于 2020-03-02 06:56:47
问题 I have an array which I created in php with a recursive function, I do not know how many dimensions, how can I use in Smarty ? I trying use this code : {foreach $myArr as $items} <li> {$items.title} {if $item.submenu} <ul> {foreach $items.submenu as $items2} <li>{$items2.title}</li> {/foreach} </ul> {/if} </li> {/foreach} But this code is for just 2 levels, may be my array have 3 or 4 or ... levels. UPDATE: I found the solution, in my solution I use Smarty functions : {function name=menu

smarty foreach 最全用法

由 送分小仙女□ 提交于 2020-03-02 03:52:49
<?php $search_condition = "where name like '$foo%' " ; $sql = 'select contact_id, name, nick from contacts ' . $search_condition . ' order by name' ; $smarty -> assign ( 'results' , $db -> getAssoc ( $sql ) ); ?> The template which display "None found" if no results with {foreachelse}. 借助{foreachelse}标记在没有结果时模板输出"None found"字样。 {foreach key = cid item = con from =$results} < a href = "contact.php?contact_id={$cid}" > {$con.name} - {$con.nick} </ a > < br /> {foreachelse} No items were found in the search {/foreach} .index index contains the current array index, starting with zero.

PHP中foreach的用法和实例

由 允我心安 提交于 2020-03-01 01:51:03
在 PHP 中经常会用到 foreach 的使用，而要用到 foreach ，就必须用到数组。因此，在这篇文章中，我们一边讲数组，一边讲 foreach 。 foreach有两种语法： **第一种：**遍历给定的 数组语句 array_expression 数组。每次循环中，当前单元的值被赋给 $value 并且数组内部的指针向前移一步（因此下一次循环中将会得到下一个单元）。 foreach (array_expression as $value) statement 第二种：同上，同时当前单元的键名也会在每次循环中被赋给变量 $key 。 foreach (array_expression as $key => $value) statement 下边我们一一来讲解一下！ 一、一维普通数组 与 foreach 我们先写一个一维数组，如下： $a = array('Tom','Mary','Peter','Jack'); 1、我们用第一种foreach方法来输出。 foreach ($a as $value) { echo $value."<br/>"; } 最后得到的结果是： Tom Mary Peter Jack 2、我们用第二种 foreach 方法来输出。 foreach ($a as $key => $value) { echo $key.','.$value."<br/

Context and variable scope in ES6 loops and forEach

由 时光毁灭记忆、已成空白 提交于 2020-02-28 06:39:12
问题 In ES5, if I have to refer to the this context of parent function in child function I have to store it in a variable and access it inside child function using that variable. Something like this ... // variant 1 var self = this; this.nums.forEach(function (v) { if (v % 5 === 0) self.fives.push(v); }); ECMAScript has arrow functions so I can avoid this: // variant 2 this.nums.forEach((v) => { if (v % 5 === 0) this.fives.push(v) }) The question that I have is: If I was to declare a variable temp

php foreach just looping on one value of array

由 二次信任 提交于 2020-02-27 12:45:06
问题 Here is my code: $bag3 = 7; $row = 4; $nom = 1; $arr = array("red", "green", "blue", "yellow"); while ($bag3){ while ($nom <= $bag3){ echo $ay." ".$row; $nom++; $row++; }if ($nom == $bag3){ $nom = 1; } } and here's the output: red 4red 5red 6red 7red 8red 9red 10 I want it to loop through all the array values: red , green , blue , and yellow . like this: red 4red 5red 6red 7red 8red 9red 10green 11green 12green 13green 14green 15green 16green 17blue 18blue 19blue 20blue 21blue 22blue 23blue
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