The first option gives you more flexibilty: var $div = $(“<div>”, {id: “foo”, “class”: “a”}); $div.click(function(){ /* … */ }); $(“#box”).append($div); And of course .html(‘*’) overrides the content while .append(‘*’) doesn’t, but I guess, this wasn’t your question. Another good practice is prefixing your jQuery variables with $: Is there any specific reason behind using … Read more
If it’s a list of string, just use the c() function : R> LL <- list(a=”tom”, b=”dick”) R> c(LL, c=”harry”) $a [1] “tom” $b [1] “dick” $c [1] “harry” R> class(LL) [1] “list” R> That works on vectors too, so do I get the bonus points? Edit (2015-Feb-01): This post is coming up on its … Read more
Use bash builtin redirection (tldp): cat file2 >> file1
your_set.update(your_sequence_of_values) e.g, your_set.update([1, 2, 3, 4]). Or, if you have to produce the values in a loop for some other reason, for value in …: your_set.add(value) But, of course, doing it in bulk with a single .update call is faster and handier, when otherwise feasible.
If you only have one reference to a string and you concatenate another string to the end, CPython now special cases this and tries to extend the string in place. The end result is that the operation is amortized O(n). e.g. s = “” for i in range(n): s+=str(i) used to be O(n^2), but now … Read more
Add dots after the second slice: //—————————vvv append([]int{1,2}, []int{3,4}…) This is just like any other variadic function. func foo(is …int) { for i := 0; i < len(is); i++ { fmt.Println(is[i]) } } func main() { foo([]int{9,8,7,6,5}…) }
referenceNode.parentNode.insertBefore(newNode, referenceNode.nextSibling); Where referenceNode is the node you want to put newNode after. If referenceNode is the last child within its parent element, that’s fine, because referenceNode.nextSibling will be null and insertBefore handles that case by adding to the end of the list. So: function insertAfter(newNode, referenceNode) { referenceNode.parentNode.insertBefore(newNode, referenceNode.nextSibling); } You can test it … Read more
You can use df.loc[i], where the row with index i will be what you specify it to be in the dataframe. >>> import pandas as pd >>> from numpy.random import randint >>> df = pd.DataFrame(columns=[‘lib’, ‘qty1’, ‘qty2’]) >>> for i in range(5): >>> df.loc[i] = [‘name’ + str(i)] + list(randint(10, size=2)) >>> df lib qty1 … Read more
As of jQuery 1.4 you can pass attributes to a self-closed element like so: jQuery(‘<div>’, { id: ‘some-id’, class: ‘some-class some-other-class’, title: ‘now this div has a title!’ }).appendTo(‘#mySelector’); Here it is in the Docs Examples can be found at jQuery 1.4 Released: The 15 New Features you Must Know .
cmd >>file.txt 2>&1 Bash executes the redirects from left to right as follows: >>file.txt: Open file.txt in append mode and redirect stdout there. 2>&1: Redirect stderr to “where stdout is currently going”. In this case, that is a file opened in append mode. In other words, the &1 reuses the file descriptor which stdout currently … Read more