1) eval/parse Create a cmd string, parse it and evaluate it: f2 <- function(DF, x, env = parent.frame()){ cmd <- sprintf(“mutate(%s, %s = mean(v1))”, deparse(substitute(DF)), x) eval(parse(text = cmd), env) } f2(DF, “v1_name”) giving v1 v1_mean 1 1 2 2 2 2 3 3 2 … etc … 2) eval/as.call Another way is to construct … Read more
Json comes from J ava S cript O bject N otation. It’s a javascript-compatible format, so you can loop through it, and access it as you need. In other words, you do can get array[0][1][1]. If what you’re asking for is how can you receive a JSON in a string and convert it to an … Read more
Interface builder Start by placing 2 UIImageView over each other. Set both their modes to Aspect Fit. On the UIImageView you want to blur, also check User Interaction Enabled. Make sure to set the spacing to nearest neighbour constrains of the UIImageView you DO want to blur to -10, and the spacing to nearest neighbour … Read more
I think you might mean “how to check if at least one checkbox is checked?” <div class=”a_list”><input type=”checkbox” /><p>Testing A list </p></div> <div class=”a_list”><input type=”checkbox” /><p>Testing A list </p></div> <div class=”a_list”><input type=”checkbox” /><p>Testing A list </p></div> <div class=”a_list”><input type=”checkbox” /><p>Testing A list </p></div> if (!$(“.a_list input:checked, .b_list input:checked”).length){ alert(“Please make a selection”); } inputs do … Read more
I don’t see an issue, but if you’re asking if your approach is improvable, yes. I would simply use a class with these properties(inclusing gender). class Person { public bool IsFemale { get; set; } public string Name { get; set; } } Now you can create a single collection, for example a List<Person> and … Read more
I would suggest using a Dictionary for this task: d = {} for x in range(1,10): d[“slider{0}”.format(x)]= models.IntegerField(widget=widgets.Slider, default=50, label=””) 2 solved How to declare multiple similar variables in python? [duplicate]
Why is @ad not []? Why would it be? Your code is extremely basic, and it says “if @ad has less than two items, set it to an empty array”. As you clearly show, @ad doesn’t have less than two items, it has three items. Does three seem less than two to you? If you’re … Read more
Ultimately, this is the same problem mentioned here: How can I use EF to add multiple child entities to an object when the child has an identity key? If you have a auto generated PK and attempt to do an Add after doing a previous udpate/delete on the same context, it will crash because you … Read more
Try read.csv() dat <- read.csv(text = “Control,3 Test,3 Control,3 Control,3 Test,1 Control,3 Control,1”, header = FALSE) > dat V1 V2 1 Control 3 2 Test 3 3 Control 3 4 Control 3 5 Test 1 6 Control 3 7 Control 1 However, you’ll need read.csv(file = “foo.csv”, header = FALSE) and replace foo.csv with the … Read more
In order to achieve what you want this will do the job: <html> <head> <script src=”https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js”></script> <script> $(document).ready(function() { $(‘#myButton’).on(‘click’,function(){ alert(“i clicked it”); }); }); </script> </head> <body> <button id=”myButton”>Click Me!</button> </body> </html> $(document).ready is used to execute your code just after your page is rendered, then $(‘myButton’) will get any element with an id … Read more
Include jquery ,jquery ui only work with jquery <script src=”https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js”></script> <link rel=”stylesheet” href=”https://ajax.googleapis.com/ajax/libs/jqueryui/1.11.1/themes/smoothness/jquery-ui.css” /> <script src=”https://ajax.googleapis.com/ajax/libs/jqueryui/1.11.1/jquery-ui.min.js”></script> <script> $(function() { $(“#dp1”).datepicker(); }); </script> Fiddle 0 solved JQuery DatePicker calendar does not appear
It returns 5 on first iteration if you pass 4 to it. In general it returns n + 1 for any n > 1. Following the code path, it can be unrolled into product = 1 n > product // true, loop product *= n // so product is n product++ // end of loop, … Read more
You can do it as follows: String section = “PRIMARY”; Optional.ofNullable(student) .map( i -> (i.getStandard() > 5) ? “SECONDARY” : section ) .orElse(section); solved How to simplify if statement using Optional.ofNullable() [closed]
In the future, provide some code to show what you have attempted. I have expanded on Fabix answer. The following code gets the Youtube link, song name, and artist for all 20 pages on the source website. from bs4 import BeautifulSoup import requests master_url=”https://www.last.fm/tag/rock/tracks?page={}” headers = { “User-Agent”: “Mozilla/5.0 (iPhone; CPU iPhone OS 5_1 like … Read more
You have a ? quantifier for ( and ) in your regex, which matches your parentheses for zero or one times. Simply removing it will do the trick. var format = /^\(([0-9]{3})\)[ ]?([0-9]{3})[-]?([0-9]{4})$/; Have a test for it here 1 solved Regex for Phone Number validation in JavaScript [closed]