Php two-layer foreach loop how to set the initial value of the in-layer loop variable to 0
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How to enable the $ I value to start from 0 after the second layer loop after the layer loop, instead of continuing the value of the previous loop
While loopSuitable for environments where the proposition is true when the loop is executedWhen a proposition is true, it enters a loop, and a proposition is a false exit loop.Or when the condition is met, it goes into the loop.Syntax format:While CONDITION; DoLoop bodyDoneCONDITION: Cyclic control conditionsEntry condition: condition is true;Exit Condition: Condition is falseBefore entering the
The difference between for loop and foreach is that for loop foreach
Differences between for loop and foreach
Foreach depends on IEnumerable.
The first time var a in GetList () is called, GetEnumerator returns the first object and assigns it to,
Call MoveNext every time var a in GetList () is executed. The loop end
for (int i = X; i Circulation body;}:Used primarily for loops of known cycles, saving 2 of lines of code and variable names is the most commonly used loop in Java programming.int n = 0;while (loop condition) {Circulation body;n++;}:Mainly used in the loop of unknown cycles, is the most commonly used loop except for the
In php, the smarty region loop method is called phpsmarty region loop. The method of smarty region loop in php. the example in this article describes the method of smarty region loop in php. Share it with you for your reference. The specific implementation method is as follows: The smarty area
While loop and for loop two loops can be converted to one anotherLet's take a look at it by example.First example.??1.//Output 1-10public static void Main (string[] args) {int i = 0;while (true) {if (I System.out.println (i++);} else {Break}}System.out.println ("----------------------");for (int j=1;jSystem.out.println (j);}System.out.println ("----------------------");for (int j=1;jSystem.out.println (j);j
Method of Smarty Area loop in PHP, Phpsmarty area loop
The example in this paper describes the method of Smarty area loop in PHP. Share to everyone for your reference. The implementation method is as follows:
Smarty Test
{foreach Key=key1 item=item1 from= $array 1}
{$key 1}
JAVA break terminates the loop and enters the next loop with continue. breakcontinue
I. break termination cycle
In the loop, the break will jump out of the loop and continue to execute the code.
Public class Test {public static void main (String [] args) {for (int I = 1; I
Ii. continue to enter the next cycle
In
Disruption to common sense-code with an endless loop structure, and the opportunity to execute logic outside the loop
Class ZookeeperDemo extends Zookeeper {
Public function watcher ($ I, $ type, $ key ){
Echo "Insider Watcher \ n ";
// Watcher gets consumed so we need to set a new one
$ This-> get ('/test', array ($ this, 'Watcher '));
}
}
$ Zoo = new ZookeeperDemo ('2017. 0.0.1: 100 ');
$ Zoo->
When using List.append (a) to add a dynamically changing a (A = Random.random ()), it is found that each new cyclic change of a in the loop changes the previous value in the list;After the lookup, Python is based on the object reference, append added is an "address, reference", when the contents of this address changes, the previous same "address" content changes.View "Memory, app" using ID (object).Simple is not verbose on the online address memory h
Jump out of the multilayer loop: three-layer loop, the innermost layer directly jumps out 3 layersMethod One:In Python, the function runs to return and stops, so you can use this feature to write functions as functions to terminate multiple loops
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defwork():#定义函数for iinrange(5):print("i=", i)forjinrange(5):print("--j=", j)forkinrange(5):ifk2:print("------>k=", k)else:retu
The following is an example of initialization for A For loop statement:
The code is as follows
Copy Code
for (var i:int=0;.) {...}for (var i:int=9;.) {...}for (var j:int=1000000;.) {...}for (var k:uint=1026;.) {...}for (var l:number=3.14;.) {...}
Test
Each for loop statement requires a termination point. You can use conditional expressions to determine when a
When you encounter the need to jump out of the inner for loop in your project, do not execute the outer for loop remaining statements and start the next outer for loop issue directly.
I personally do not want to use variables to determine whether continue, and finally found that the problem can be solved by naming the for lo
PHP Traversal Loop Array implementation method, PHP loop array
Simply use the foreach for list every while to iterate through the array, including a normal one-dimensional array and a two-dimensional array traversal method, with a detailed description of how each function is used.
Array ('aa ' =>33,' BB ' =>22,' www.phpfensi.com ' =>11),Array (' DD ' =>44, ' ee ' =>55,
Use th
$question):?>
$answer):?>
How to allow the value of $i to start at 0 instead of the value of the last loop after the second inner loop after the inner loop is completed
Reply to discussion (solution)
I don't understand what you mean, for example. or explain how you want to output it.
I don't understand what you mean, for example. or explain
, you say, to subvert common sense.
It's not about the distribution, it's just my business needs.The place of subversion is--In PHP, the structure of the dead loop has the opportunity to perform a loop-independent logic outside of the loop--this is the performance of multithreading--and we suspect that the zookeeper extension is running in a multithreaded manner
Today, in the chain storage process of linear tables, I encountered a strange problem, that is, the same program, which can be smoothly executed using the for loop, however, using the while loop reminds me that "the Node space application failed !!! ", I had no clue for a whole morning. Record this issue and continue exploring it later.
The following describes how to create a single-chain table using a For
A For loop is used in Javascript, which can have a significant impact on performance when there are many data records to loop. At this point we can consider expanding the for loop, where the Duff device (Duff device) will be used.Let's start with a small example, with a For loop:function Process (data) {Htmlstr+ = data +""; //div = document.getElementById ("mydiv
The difference between the while loop and the repeat loop in MySQL1, while is to meet the conditions to execute the cycle, repeat is to meet the conditions exit cycle;2. While the condition is judged at least 0 times before the first loop is executed, the repeat is judged after the first execution cycle, and the loop e
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