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cancelling queued performSelector:afterDelay calls
...erformSelector
cancelPreviousPerformRequestsWithTarget
(Just to make it extra hard to remember, without searching the docs.)
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https URL with token parameter : how secure is it?
...ople having access to all the tokens.
Additionally the URL with the query string would be saved in your user's history, allowing other users of the same machine to access the URL.
Finally and what makes this very insecure is, the URL is sent in the Referer header of all requests for any resource,...
How to avoid warning when introducing NAs by coercion
...roblematic characters to NA first. For your particular problem, taRifx::destring does just that. This way if you get some other, unexpected warning out of your function, it won't be suppressed.
> library(taRifx)
> x <- as.numeric(c("1", "2", "X"))
Warning message:
NAs introduced by coerc...
Mercurial: how to amend the last commit?
...t).
||
||
\/
Caveat emptor:
This extra option will only be enabled if the mercurial version is at least
2.2.0, and if the current revision is not public, is not a patch and has no
children. [...]
Clicking the button will call
'commit --amend' ...
Binding a Button's visibility to a bool value in ViewModel
...pertyChanged.Raise(this, e);
}
protected void OnPropertyChanged(string propertyName)
{
OnPropertyChanged(new PropertyChangedEventArgs(propertyName));
}
This is how they use Model-view-viewmodel
But since you want it binded to a boolean, You will need some converter....
When is a function too long? [closed]
...hese rules, but that should always be considered a special-case. Spending extra development time up-front is an initial investment that can avoid future (potentially crippling) tech-debt.
– Ryan Delucchi
Sep 5 '13 at 21:29
...
How to generate all permutations of a list?
... in range(len(elements)):
# nb elements[0:1] works in both string and list contexts
yield perm[:i] + elements[0:1] + perm[i:]
A couple of alternative approaches are listed in the documentation of itertools.permutations. Here's one:
def permutations(iterable, r=None...
When to use a linked list over an array/array list?
...
To add to the other answers, most array list implementations reserve extra capacity at the end of the list so that new elements can be added to the end of the list in O(1) time. When the capacity of an array list is exceeded, a new, larger array is allocated internally, and all the old element...
Javascript: How to detect if browser window is scrolled to bottom?
..., and hence the condition does not get triggered. Not sure why, had to add extra few px to make it work.
– Sharjeel Ahmed
Apr 27 '17 at 11:34
3
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How to remove convexity defects in a Sudoku square?
...(ri+1)*50-1 , ci*50:(ci+1)*50-1].copy TypeError: long() argument must be a string or a number, not 'builtin_function_or_method'
– user898678
Feb 6 '13 at 21:38
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