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PHP Fatal error: Using $this when not in object context
...c method
but can also be
$foobar = new foobar; // correct
$foobar->foobarfunc();
You can not invoke method this way because it is not static method.
foobar::foobarfunc();
You should instead use:
foobar->foobarfunc();
If however you have created a static method something like:
...
Visual Studio replace tab with 4 spaces?
...
You can edit this behavior in:
Tools->Options->Text Editor->All Languages->Tabs
Change Tab to use "Insert Spaces" instead of "Keep Tabs".
Note you can also specify this per language if you wish to have different behavior in a specific language.
...
Simple explanation of MapReduce?
...iting loops, if I have a map function I could write
A = [1, 2, 3].Map(x => x * 2)
the x => x * 2 is a function to be executed against the elements in [1,2,3]. What happens is that the program takes each item, execute (x => x * 2) against it by making x equals to each item, and produce a ...
Peak detection in a 2D array
...f detect_peaks(image):
"""
Takes an image and detect the peaks usingthe local maximum filter.
Returns a boolean mask of the peaks (i.e. 1 when
the pixel's value is the neighborhood maximum, 0 otherwise)
"""
# define an 8-connected neighborhood
neighborhood = generate_bin...
How to dump a dict to a json file?
...Good thing to remember here is that unless you use an OrderedDict (python >2.7) there is no guarantee that keys are ordered in any particular manner
– ford prefect
Aug 1 '17 at 18:08
...
One-liner to take some properties from object in ES 6
...ter destructuring" to avoid the need for the v parameter.
({id, title}) => ({id, title})
(See a runnable example in this other answer).
@EthanBrown's solution is more general. Here is a more idiomatic version of it which uses Object.assign, and computed properties (the [p] part):
function pi...
Where in memory are my variables stored in C?
...questions tricked you on at least one question:
global variables -------> data (correct)
static variables -------> data (correct)
constant data types -----> code and/or data. Consider string literals for a situation when a constant itself would be stored in the data segment, and reference...
How to split a sequence into two pieces by predicate?
...
By using partition method:
scala> List(1,2,3,4).partition(x => x % 2 == 0)
res0: (List[Int], List[Int]) = (List(2, 4),List(1, 3))
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improve thi...
Add swipe to delete UITableViewCell
...ew(tableView: UITableView, canEditRowAtIndexPath indexPath: NSIndexPath) -> Bool {
return true
}
func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
if (editingStyle == UITableViewCellEditingStyl...
TortoiseGit save user authentication / credentials
...
Right click -> TortoiseGit -> Settings -> Git -> Credential. Select Credential helper: wincred - this repository only / wincred - current Windows user
– linquize
Aug 16 '13 at 2:14
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