ALTER TABLE t1 MODIFY COLUMN c1 TIMESTAMP NULL — the opposite is NOT NULL, which is implicitly set on timestamp columns DEFAULT NULL — no default value for newly-inserted rows ON UPDATE CURRENT_TIMESTAMP; 0 solved How can I add “ON UPDATE CURRENT_TIMESTAMP” on a column at table creation or by alter table withoud defining its … Read more
php syntax is pretty similar to JS. Just take the variables and remove the $, and declare them with the var keyword. function esn_to_num(esn) { var tmp = []; if ((tmp = explode(‘-‘, $esn))) { if (sizeof(tmp) == 2 && my_isnum(tmp[0]) && my_isnum(tmp[1]) ) { esn = ((tmp[0] << 23) | tmp[1]); } else { … Read more
+— arr[2] | v let arr = [1, 2, 3]; <—— arr.length = 3 console.log(arr.length + arr[2]); ^ | +– arr at index 2 returns 3 let arr = [1, 2, 3]; //arr.length = 3 console.log(arr.length + arr[2]); // arr[2] = 3 0 solved What will the following code regarding arrays print?
In your code is another semantic error: You start with image picollage000.gif but it should be picollage0001.gif, shouldn’t it? I changed that using the if-clauses and another condition in the for-loop. #import “ViewController.h” #define IMAGE_COUNT 383 @interface ViewController () @end @implementation ViewController – (void)viewDidLoad { [super viewDidLoad]; NSMutableArray *imageArray = [[NSMutableArray alloc] initWithCapacity:0]; // Start … Read more
I call the split function passing dash which separate each part of the string str.split(“-“).reverse().join(“-“); Description of functions used String.prototype.split(): The split() method turns a String into an array of strings, by separating the string at each instance of a specified separator string. const chaine = “Text”; console.log(chaine.split(”)); // output [“T”, “e”, “x”, “t”] Array.prototype.reverse(): … Read more
You can’t really do that, the only possible thing is put the response and the source on the same line. Or you could use ; between statements, but that’s ugly. But more importantly, why would you do that? Why is it better to have it all in on line? >>> import this The Zen of … Read more
Load jQuery before your script and use your browser’s error console Uncaught ReferenceError: $ is not defined java.js:9 1 solved Center an image in document [closed]
Plenty of ways to do this, here is one: def is_triangle(a, b, c): if (a > b + c) or (b > a + c) or (c > a + b): print “No” else: print “Yes” 4 solved Python exercise
You can use an authentication system, and do not present the public url to the downloader. For example, you create a table like: file_name | file_path | file_code ——————————————————- My picture | /var/docs/img.jpg | kljsldjalksdqhq1218 And after the user is logged in (and meets the criteria you defined) you present him with the download link: … Read more
It means you have heap corruption in your program. You likely allocate some memory using malloc, but write outside the actual bounds, corrupting the heap. When you call free, glibc detects the corruption and reports it (specifically, the size of the next free chunk is overwritten). You should definitely fix this problem. Valgrind can be … Read more
you can check it easily with the modulo operator (%), which finds the remainder after the division of one number by another: if(number1 % number2 == 0) { // result of division is integral // or in other words: number1 / number2 = whole number } Note that number1 and number2 have to be integers … Read more
This: newSequence = deduction.Sequence++; Is equivalent to this: newSequence = deduction.Sequence; deduction.Sequence = deduction.Sequence + 1; Make more sense now? If you did this: newSequence = ++deduction.Sequence; It turns into this: deduction.Sequence = deduction.Sequence + 1; newSequence = deduction.Sequence; As others have said, you are probably not looking to change deduction.Sequence, so you want to … Read more
We can try subset subset(dati, format(as.Date(Date),”%Y”)==2005) If we are trying to subset the data for each year, try split split(dati, format(as.Date(dati$Date), “%Y”)) solved R get subset from data frame filtering by year Date value
You dont need to worry about memory leaks, in your case you use std::vector which uses RAII to make sure no memory is leaked. With STL containers you can “leak” in such case on;y if you do not shrink your vector after using remove algorithm. Below is fix to your code, and not entire rewrite. … Read more
public ActionResult Index() { var EmployeerId = SessionPersister.Email_ID; //Convert.ToInt32(EmployeerId); int EmpId=int.Parse(EmployeerId); db.Job_Det.OrderByDescending(j => j.Job_ID).ToList().Where(x => x.Employeer_ID = EmpId); return View(); } solved Cannot implicitly convert type ‘string’ to ‘integer’ [closed]