numbers

问题 I would like to solve an equation for x, and i know that there are atleast two solutions,which means that jj will be a vector. I need the largest of those solutions - that is were max(jj) comes into play. However z = max(jj) will give me the biggest number, but it does not evaluate it. for example z could be = 2*3^4 + 1 . In this form i can't send this "number" to another function which I want to do. the 'k' is a given number not a variable. (say k=10 or any other number) syms x eqn = x + (k

问题 I need to generate a file filled with three "random" values per line (10 lines), but those values sum must equal 15. The structure is: "INDEX A B C". Example: 1 15 0 0 2 0 15 0 3 0 0 15 4 1 14 0 5 2 13 0 6 3 12 0 7 4 11 0 8 5 10 0 9 6 9 0 10 7 8 0 回答1: If the numbers can by any just use combinations: from itertools import combinations with open("rand.txt","w") as f: combs = [x for x in combinations(range(16),3) if sum(x ) == 15 ][:10] for a,b,c in combs: f.write("{} {} {}\n".format(a,b,c))

问题 I have a few elements with identical class names. How can I get the number of the elements which I clicked with onclick events? For example: var x = document.getElementsByClassName("myclass").length; for (a=0; a<=x; a++) { // here i want get number of clicked myclass } 回答1: You can use indexOf on an array of document.getElementsByClassName("myclass") . You can use Array.from or [].slice.call to make the array. Assuming your click handlers look like in the snippet below and they “Do something

问题 According to the ECMAScript 6.0 specification: ...there is both a positive zero and a negative zero. For brevity, these values are also referred to for expository purposes by the symbols +0 and -0, respectively. (Note that these two different zero Number values are produced by the program expressions +0 (or simply 0) and -0.) So, +0 and -0 are different Number values but they are considered equal. I've checked that -0 === +0 equates to true . I assume this is just an artifact of how numbers

问题 I am trying to create a datagridview that will automatically format the numbers that a user enters. My datagridview is not linked to a datasource, it is built programmatically like so: Private Sub FormatGridView() Dim ILNumColumn As New DataGridViewTextBoxColumn Dim ArtNumColumn As New DataGridViewTextBoxColumn Dim DescColumn As New DataGridViewTextBoxColumn 'Header text ILNumColumn.HeaderText = "# IL" ArtNumColumn.HeaderText = "# Articles" DescColumn.HeaderText = "Description" 'Wrap

问题 This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center. Closed 6 years ago . I need to get the largest sum of n consecutive digits in a range of a large number. For example, the range could be 5^150000 , within this range I want

问题 Hi I have a big string like this : "999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999" I wish to convert this string to long. But I failed. I did: Long

问题 I'm trying to create code in AppleScript that will click my mouse randomly every 1-2 seconds... I want a video game I'm playing to not know or be able to tell that a robot is clicking for me so I need it to be RANDOM... not every second or every 2 seconds but every x seconds where x is a constantly changing variable in-between 1 and 2 seconds... Here is the code so far but it clicks every 1 second: on idle tell application "System Events" key code 87 end tell return 1 end idle I thought

问题 I'm trying to create a checkout menu with jQuery and HTML and I am having trouble getting the input box for the item quantity to behave predictably. When I use the cursor to change the input value, the output for the 'price' variable is "NaN". When I use the arrow keys, the price updates once, but fails after the first change. How do I get the number input value, multiply it by the text (the price) in the <p> tag, and update the text every time the number is increased or decreased? I've got

问题 I was recently rejected from a potential employer after submitting this code. They suggested I wasn't technically capable enough. I'm wondering if someone could shed light on to how to make this better/more efficient. The question was to find the N longest lines from a file of multiple lines. This ultimately boiled down to a sorting problem, so I built an algorithm to find the N largest numbers from a list of numbers as so: def selection(numbers, n): maximum = [] for x in range (0, n):