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问题 I have a list i.e. my_list = ['a', 'b', 'c', 'd','e','f'] I want to print this out in a pipe or comma delimited format, but because some of my list objects can have commas or pipes, I would like to wrap double quotes around each object when I print i.e. the output should be "a"|"b"|"c"|"d"|"e"|"f" rather than a|b|c|d|e|f i can't use format on my version of python 回答1: Create a generator that formats each element, then unpack it and use a custom separator. If you are using Python 2, import the

问题 I'm working on an application using ZF2. In my application, I have to insert many rows in a database (about 900). I've got a table model for this, so I first try to do : $table->insert(array('x' => $x, 'y' => $y)); in my loop. This technically work, but this is so slow that I can hardly insert half of the datas before php's timeout (and I can't change the timeout). Then, I've decide to use a prepared statment. So I've prepared it outside of the loop, then execute it in my loop... it was even

问题 How do I create a quoted list in Lisp that uses the symbols' values in the list, rather than the symbols themselves? For example, take two variables foo and bar , foo = "hello" and bar = "world" . How do I get a list that contains "hello" "world" from these two variables. The best thing I can think of is this: ;; This is Emacs Lisp (let ((foo "hello") (bar "world")) (message (prin1-to-string '(foo bar))) ;; prints "(foo bar)" But this is wrong. What's the right way to do this? 回答1: Never mind

问题 I am using WordPress 5.2 with the plugin YITH Woocommerce Request A Quote Premium. Whenever I hit “Send Your Request” the page refreshes and nothing happens. No email is sent and when I enabled debug in wp-config I get this: Notice: is_main_query was called incorrectly. In pre_get_posts, use the WP_Query->is_main_query() method, Notice: id was called incorrectly. Product properties should not be accessed directly Any help or advice would be greatly appreciated! 回答1: here is what i have when i

问题 I wrote a function as: gener1 <- function(du){ nth <- paste0(paste0("dum", 1:du, " * ", "X", 1:du), collapse = " + ") return(nth) } it returns a sequence as: "dum1 * X1 + dum2 * X2 + dum3 * X3" Now I want to use this sequence in a next function. Simply I can just copy that and paste: S = quote(dum1 * X1 + dum2 * X2 + dum3 * X3) Result: dum1 * X1 + dum2 * X2 + dum3 * X3 It works. I wonder if it is possible to automatize that I do not need to use a "copy paste approach". The final product I

问题 I got a very good response in my last question. The idea was to process N number of inputs from command line, save first 9 to variables and make a string with 10 to onward. I found this to be the easiest solution. var1="$1" var2="$2" var3="$3" var4="public" var5="$5" var6="''" var7="$7" var8="$8" var9="$9" var10="$(shift 9; IFS=""; echo "$*")" echo snmptrap $var1 $var2 $var3 $var4 $var5 $var6 $var7 $var8 $var9 "$var10" snmptrap $var1 $var2 $var3 $var4 $var5 $var6 $var7 $var8 $var9 "$var10"

问题 I have to remake backquote (with unquote and unquote-splicing) without using the builtins reader macros `,@ The behaviour expected is: > (BACKQUOTE (A B (LIST ‘C ‘D) (COMA (LIST ‘E ‘F) (COMA-AT (LIST ‘G ‘H))) (A B (LIST ‘C ‘D) (E F) G H) I try to do it with a macro but the results are no the expected. Many thanks!!! Any hints of what could be done? 回答1: http://lib.store.yahoo.net/lib/paulgraham/glsbq.lisp has an example 回答2: For Those Who well settle for a simple and incorrect solution but it

问题 I want to write an (somehow) enhanced sum function which takes a number of indices at once, but I cannot understand how to get it work. Here is what I currently have: (%i1) nsum(indexes, expr) := if indexes = [] then expr else nsum(rest(indexes), sum(expr, first(indexes),1, N)) $ (%i2) nsum([i,j], i+j), nouns; sum: index must be a symbol; found intosym(first(indexes)) #0: nsum(indexes=[k,j],expr=k+j) I think this could be fixed by forcing Maxima expand first(indexes) into a symbol before

问题 I have writteln asp.net web projet in C#. The problem is in saving sign of quote " in a database and displaying this again in a page. For example there is a textbox and I type following: "abcd" and save this in DB. However, when I read this again and display it in a page I see: "abcd" So what is a problem here?Does someone know the solution? the charset I use is utf8 and colattion is utf8generalci 回答1: Try use HTML decode and encode HttpUtility.HtmlDecode Refer http://msdn.microsoft.com/en-us

问题 I want quote item id every time a product added to cart. I have tried many event they return the quote item object but object doesn't contain quote item id as it exists only when cart save to the db. So is there any event which will return the quote item object with quote item id? I have used following events checkout_cart_product_add_after sales_quote_add_item but it will not return quote_item_id in public function addItemToSalesModelInfo(Varien_Event_Observer $observer){ $item = $observer-