quote

问题 I've been using PDO::quote to generate SQL statements. I use the generated SQL to create a memcached key. I'd like to avoid having to create a connection solely for the purpose of escaping SQL values. What is the purpose of needing to establish a connection to use PDO::quote method and can it be avoided? 回答1: Because PDO is an abstraction layer, and each database's quoting methods differ. PDO must know WHICH database you're going to be using to be able to use the proper quoting/escaping API

问题 I have the following backtick on my list's names. Prior lists did not have this backtick. $`1KG_1_14106394` [1] "PRDM2" $`1KG_20_16729654` [1] "OTOR" I found out that this is a 'ASCII grave accent' and read the R page on encoding types. However what to do about it ? I am not clear if this will effect some functions (such as matching on list names) or is it OK leave it as is ? Encoding help page: https://stat.ethz.ch/R-manual/R-devel/library/base/html/Encoding.html Thanks! 回答1: My

问题 This question already has answers here : Closed 8 years ago . Possible Duplicate: What does the 'period' character (.) mean if used in the middle of a php string? as the title says, why are the periods? such as require("mod/".$modarrayout."/bar.php"); obviously its because the variable is between strings, but shouldnt the quotes have taken care of that? Just want to know to clarify further coding 回答1: In PHP, the period is the concatentation operator. Putting the periods in tells PHP to

问题 I want to do the same as here but with dplyr and one more column. I want to selecting a column via a string variable, but on top I also want to select a second column normally. I need this because I have a function which selects a couple of columns by a given parameters. I have the following code as an example: library(dplyr) data(cars) x <- "speed" cars %>% select_(x, dist) 回答1: You can use quote() for the dist column x <- "speed" cars %>% select_(x, quote(dist)) %>% head # speed dist # 1 4

问题 Why should I use #' together with lambda? It is usually written that way, so I guess it is good form. But these lines seem equal to me: > (mapcar #'(lambda (x) (+ x 1)) '(1 2 3)) (2 3 4) > (mapcar (lambda (x) (+ x 1)) '(1 2 3)) (2 3 4) Anyone care to enlighten a beginner about the difference? 回答1: #' is shorthand for function , which returns a pointer to a function (instead of applying it). lambda returns a function, and it's usual to want a pointer to that function. Since this is so common,

问题 I have csv file that has contents like this: 10,53073,0,0,'Y','2008-05-30 21:46:55',0,'2008-05-30 21:48:04',0,53071,2 I want to load the csv data into my_table. CREATE TABLE my_table ( ad_tree_id numeric(10,0) NOT NULL, node_id numeric(10,0) NOT NULL, ad_client_id numeric(10,0) NOT NULL, ad_org_id numeric(10,0) NOT NULL, isactive character(1) NOT NULL DEFAULT 'Y'::bpchar, created timestamp without time zone NOT NULL DEFAULT now(), createdby numeric(10,0) NOT NULL, updated timestamp without

问题 I have an xml file for which I try do display some informations into a php form. So i've been trying to do something like that: <?php $url="tmp/".$_GET['n_doss']."-".date('d-m-Y')."-legale.xml"; if(file_exists($url)) { $chaineXML= $url; $dom = new DomDocument(); $dom->load($chaineXML); $date = $dom->getElementsByTagName('time'); $time = DateTime::createFromFormat("d/m/Y H:i:s", $date->item(0)->nodeValue); $datecreditsafe=date_format($time, 'd-m-Y'); if($dom->getElementsByTagName('errors')-

问题 the origin... I have a module with a setup script (common mysql4-upgrade-0.1.0-0.1.1.php), adding an attribute to quote: $eav = new Mage_Eav_Model_Entity_Setup('sales_setup'); $eav->addAttribute('quote', 'my_attribute', array('type' => 'varchar')); If I run my magento store on an empty DB, setups scripts run and a 'Wrong entity ID' error breaks the process. Call stack points to my setup script. ...looking for... If I go to database, I see eav_entity_type table filled but only with 8 types:

问题 I am writing a C code which reads from a file and generates an intermediate .c file. To do so I use fprintf() to print into that intermediate file. How can I print " ? 回答1: You can use escape symbol \" For example puts( "\"This is a sentence in quotes\"" ); or printf( "Here is a quote %c", '\"' ); or printf( "Here is a quote %c", '"' ); 回答2: If you just want to print a single " character: putchar('"'); The " doesn't have to be escaped in a character constant, since character constants are

问题 I'm running Magento 1.7. I'm trying to add a quote item option, a custom one, in sales_flat_quote_item_option. I have tried with addOption and addCustomOption functions, but it seems no query is launched to the database. This is my code right now (in a custom module helper) : public function assignDocumentToQuoteItem(Mage_Sales_Model_Quote_Item $quoteItem, $documentid) { if (is_numeric($documentid) && $documentid > 0) { /** @var Mage_Catalog_Model_Product */ $product = $quoteItem->getProduct(