foreach

问题 I am using a connection to my database and retrieve dates for each of my roomcodes. The output for the arrays is Array ( [0] => 2020-05-23 [1] => 2020-05-24 [2] => 2020-05-25 [3] => 2020-05-26 [4] => 2020-05-27 [5] => 2020-05-28 [6] => 2020-05-29 [7] => 2020-05-30 [8] => 2020-07-23 [9] => 2020-07-24 [10] => 2020-07-25 [11] => 2020-07-26 [12] => 2020-07-27 [13] => 2020-07-28 [14] => 2020-07-29 [15] => 2020-07-30 [16] => 2020-07-31) Array ( [0] => 2020-05-23 [1] => 2020-05-24 [2] => 2020-05-25

问题 I have a simplexml object which looks as below <?xml version="1.0"?> <SalesInvoices xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://api.unleashedsoftware.com/version/1"> <SalesInvoice> <OrderNumber>100</OrderNumber> </SalesInvoice> <SalesInvoice> <OrderNumber>101</OrderNumber> </SalesInvoice> </SalesInvoices> I want to iterate through it and print only the order number. I use this script: foreach ($xml->SalesInvoices-

问题 Tell me if I'm wrong: array.forEach(callbackFunction) is suited for sparse arrays. It executes callbackFunction not for each index between zero and the array length, but only for the keys which are actually in the array. And (tell me if I'm wrong) those keys are exactly what Object.keys(array) will give me. Hence (tell me why I'm wrong) it shouldn't make a difference if the .forEach method is called on array itself or on Object.keys(array) . So, why on earth is there this performance

问题 Tell me if I'm wrong: array.forEach(callbackFunction) is suited for sparse arrays. It executes callbackFunction not for each index between zero and the array length, but only for the keys which are actually in the array. And (tell me if I'm wrong) those keys are exactly what Object.keys(array) will give me. Hence (tell me why I'm wrong) it shouldn't make a difference if the .forEach method is called on array itself or on Object.keys(array) . So, why on earth is there this performance

问题 I have code that I want to look like this: List<Type> Os; ... foreach (Type o in Os) if (o.cond) return; // Quitting early is important for my case! else Os.Remove(o); ... // Other code This doesn't work, because you cannot remove from the list when you are inside a foreach loop over that list: Is there a common way to solve the problem? I can switch to a different type if needed. Option 2: List<Type> Os; ... while (Os.Count != 0) if (Os[0].cond) return; else Os.RemoveAt(0); ... // Other code

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 5 years ago . so im having trouble understanding enhanced for loops.. Write a method called contains() that takes an array of integers and an integer value. The method should return true if the array contains the specified value, otherwise false. boolean contains (int [] x, int y) { for (y : x)

问题 new at this, please tell me if I'm leaving information out or anything like that. The code I'm working on can be seen here: http://codepen.io/hutchisonk/pen/mVyBde and I have also pasted the relevant section of javascript below. I'm having trouble understanding why this code is behaving as it is. Quick outline - I have defined a few variables at the top, made a function that fetches the data I need and builds it into a pretty little list. This seems to be working as planned. With the function

问题 new at this, please tell me if I'm leaving information out or anything like that. The code I'm working on can be seen here: http://codepen.io/hutchisonk/pen/mVyBde and I have also pasted the relevant section of javascript below. I'm having trouble understanding why this code is behaving as it is. Quick outline - I have defined a few variables at the top, made a function that fetches the data I need and builds it into a pretty little list. This seems to be working as planned. With the function

问题 Im trying to add dtnamic fileds and through that insert arrays data into mysql but when i try this code nothing error and ref no only inserting can anyone help me . im using Codeigniter framework. This is my view page : my form with js <div id="invoice_form"> <?php echo form_open(base_url().'sample/myinvoice'); ?> <div><?php echo form_input(array('id'=>'ref','name'=>'ref'));?></div> <div id="description"><p id="add_field">ADD DESCRIPTION</p></div> <input id="btn_add" name="btn_add" type=

问题 I have this code that gets me out some checkboxes with the watchdog severities: /** * Checkbox for errors, alerts, e.t.c */ foreach (watchdog_severity_levels() as $severity => $description) { $key = 'severity_errors' . $severity; $form['severity_errors'][$key] = array( '#type' => 'checkbox', '#title' => t('@description', array('@description' => drupal_ucfirst($description))), '#default_value' => variable_get($key, array()), ); return system_settings_form($form); } I set this $key in my code