Create two buffers of length 100 bytes each, say A and B. Read 100 bytes from file to A (assuming that the file cursor points to the beginning of the file). Seek to file length n-100. Read 100 bytes from file to B. Again, seek to file length n-100. Write 100 bytes from A to … Read more
See Frits’ answer: You can, but is there really any need? It’s nice and readable the way you’ve done it. But if you really, really want to, this is how: exports.about = function(req, res){ res.render(‘about’, {title: ‘about page’, time: new Date().toLocaleDateString() }); }; It looks a bit odd, but the new Date() part takes precedence, … Read more
It’s actually working correctly. There is a leading space on the string and thus the ninth index is the space just before the DU. Consider this diagram: Jun30/13 DU SJ9802 0123456789 You’re starting on the ninth index, and that’s a space . 1 solved string.Substring not working correctly in C#
The problem is exactly what the Traceback log says: Could not convert string to float If you have a string with only numbers, python’s smart enough to do what you’re trying and converts the string to a float. If you have a string with non-numerical characters, the conversion will fail and give you the error … Read more
That’s the definition of an abstract class. You cannot create an instance of it, only a type derived from it. Think of something like a fruit. You cannot have a fruit sitting on the table. It must be a certain type of fruit, such as an orange or an apple. In this case, fruit would … Read more
You can use a regex like this: -\d+x\d+(\.\w+)$ Working demo The code you can use is: $re = “/-\\d+x\\d+(\\.\\w+)$/”; $str = “http://website.dev/2014/05/my-file-name-here-710×557.png”; $subst=”\1″; $result = preg_replace($re, $subst, $str, 1); The idea is to match the resolution -NumbersXNumbers using -\d+x\d+ (that we’ll get rid of it) and then capture the file extension by using (\.\w+)$ using … Read more
The condition i==j+1 will not be true for i==2. This can be fixed by a couple of changes to the inner loop: #include <stdio.h> int main(void) { for (int i=2; i<100; i++) { for (int j=2; j<=i; j++) // Changed upper bound { if (i == j) // Changed condition and reversed order of if:s … Read more
As stated in the linked post MakeValid is a database function, which means that it can be executed only during querying the database. It is 1-to-1 similar to the PostGIS usage of ST_MakeValid which cannot be executed outside of a table query (cannot exist autonomously). When you create the np object, and then you try … Read more
You could use the Set object. When using the method add(), values cannot be duplicated. Here is an example: function random(x, max = 10) { // x = how many random numbers and max = the max number const set = new Set(); for (let i = 0; i <= x; i++) { // Generate … Read more
Your braces and try{} catch{} blocks are mismatched. Here is the corrected code: public partial class frmPersonnel : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { } protected void btnSubmit_Click(object sender, EventArgs e) { try { DateTime dt1; DateTime dt2; if (txtFirstName.Text == “”) { txtFirstName.BackColor = System.Drawing.Color.Yellow; lblError.Text = “Please enter first name”; … Read more
System.IO.File.Move(oldFileName, Path.ChangeExtension(oldFileName, ‘old’)); solved How can I rename .TXT files to .OLD using C#? [closed]
Just to clarify. It is impossible to extern the class: class Outside { public: Outside(int count); GetCount(); } But, once you have the class available in framework.cpp, you CAN extern an object of type Outside. You’ll need a .cpp file declaring that variable: #include “outside.h” Outside outside(5); And then you can refer to that object … Read more
Those are both undefined behavior. You are trying to modify memory that you did not allocate. The second is even less safe, because you are assuming a is going to be allocated to that address every time, which is absolutely not a safe assumption. 3 solved What is the difference between assigning a pointer to … Read more
First of all, your code doesn’t compile in most machines. Reason? cout and cin are parts of the Standard namespace std, which means that you cannot access them unless you use the appropriate commands. This can be done in two ways: Write std::cout instead of cout. This tells the compiler that you want to access … Read more
At first glance, you have a syntax error. Your string needs to be in quotes. Try var error = “<?php echo $reportErr; ?>”; 0 solved Insert Variable PHP in Jquery [duplicate]