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Checking if a folder exists (and creating folders) in Qt, C++
In Qt, how do I check if a given folder exists in the current directory?
If it doesn't exist, how do I then create an empty folder?
...
When do I need to use Begin / End Blocks and the Go keyword in SQL Server?
...t's not strictly necessary there. Where it IS necessary is for loops, and IF statements, etc, where you need more then one step...
IF EXISTS (SELECT * FROM my_table WHERE id = @id)
BEGIN
INSERT INTO Log SELECT @id, 'deleted'
DELETE my_table WHERE id = @id
END
...
How can I change the EditText text without triggering the Text Watcher?
... onTextChanged(CharSequence s, int start, int before, int count) {
if (myEditText.hasFocus()) {
// is only executed if the EditText was directly changed by the user
}
}
//...
});
Long answer
As an addition to the short answer:
In case myEditText already has th...
Difference between window.location.href=window.location.href and window.location.reload()
What is the difference between JavaScript's
12 Answers
12
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How can I check if my python object is a number? [duplicate]
...
Test if your variable is an instance of numbers.Number:
>>> import numbers
>>> import decimal
>>> [isinstance(x, numbers.Number) for x in (0, 0.0, 0j, decimal.Decimal(0))]
[True, True, True, True]
Thi...
UITableViewCell subview disappears when cell is selected
...oundColor;
[super setSelected:selected animated:animated];
if (selected){
self.yourView.backgroundColor = color;
}
}
-(void)setHighlighted:(BOOL)highlighted animated:(BOOL)animated{
UIColor *color = self.yourView.backgroundColor;
[super setHighlighted:hig...
Try catch statements in C
...tjmp and longjmp calls.
static jmp_buf s_jumpBuffer;
void Example() {
if (setjmp(s_jumpBuffer)) {
// The longjmp was executed and returned control here
printf("Exception happened here\n");
} else {
// Normal code execution starts here
Test();
}
}
void Test() {
// Rough eq...
C# Java HashMap equivalent
Coming from a Java world into a C# one is there a HashMap equivalent? If not what would you recommend?
7 Answers
...
Skip download if files exist in wget?
...oading of the file. It just doesn't do anything after downloading the file if the file has already been fully retrieved. Is there anyway to prevent making the HTTP request if the file already exists? stackoverflow.com/questions/33203898/…
– ma11hew28
Oct 18 '...
How can I check whether an array is null / empty?
...
There's a key difference between a null array and an empty array. This is a test for null.
int arr[] = null;
if (arr == null) {
System.out.println("array is null");
}
"Empty" here has no official meaning. I'm choosing to define empty a...