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Imitate Facebook hide/show expm>and m>ing/contracting Navigation Bar
...wing propertm>y m>:
@propertm>y m> (nonatomic) CGFloat previousScrollViewm>Y m>Offset;
m>And m> here are the UIScrollViewDelegate methods:
- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
CGRect frame = self.navigationController.navigationBar.frame;
CGFloat size = frame.size.height - 21;
CGFloat...
Pm>y m>thon `if x is not None` or `if not x is None`?
...he if not x is None version to be more clear, but Google's stm>y m>le guide m>and m> PEP-8 both use if x is not None . Is there anm>y m> minor performance difference (I'm assuming not), m>and m> is there anm>y m> case where one reallm>y m> doesn't fit (making the other a clear winner for mm>y m> convention)?*
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What is the difference between the | m>and m> || or operators?
I have alwam>y m>s used || (two pipes) in OR expressions, both in C# m>and m> PHP. Occasionallm>y m> I see a single pipe used: | . What is the difference between those two usages? Are there anm>y m> caveats when using one over the other or are them>y m> interchangeable?
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Whm>y m> can't an anonm>y m>mous method be assigned to var?
...to be the default instead of Predicate or Action or anm>y m> other possibilitm>y m>? m>And m>, for lambdas, whm>y m> is it obvious that the intention is to choose the delegate form, rather than the expression tree form?
But we could sam>y m> that Func is special, m>and m> that the inferred tm>y m>pe of a lambda or anonm>y m>mous method i...
Using @propertm>y m> versus getters m>and m> setters
... prevent m>y m>ou from actuallm>y m> getting or setting that attribute. Therefore, stm>and m>ard attribute access is the normal, Pm>y m>thonic wam>y m> of, well, accessing attributes.
The advantage of properties is that them>y m> are sm>y m>ntacticallm>y m> identical to attribute access, so m>y m>ou can change from one to another without anm>y m> ...
Ignore Tm>y m>pescript Errors “propertm>y m> does not exist on value of tm>y m>pe”
... m>Y m>ou could also create an interface that extends HTMLElement m>and m> has the additional getBBox propertm>y m>. That wam>y m> m>y m>ou still get code completion on the other properties.
– thetallweeks
Sep 24 '14 at 19:13
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Call applm>y m>-like function on each row of dataframe with multiple arguments from each row
...mns. For each row in the dataframe, I want to call a function on the row, m>and m> the input of the function is using multiple columns from that row. For example, let's sam>y m> I have this data m>and m> this testFunc which accepts two args:
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Making a UITableView scroll when text field is selected
After a lot of trial m>and m> error, I'm giving up m>and m> asking the question. I've seen a lot of people with similar problems but can't get all the answers to work right.
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How can I generate Unix timestamps?
...tOS host (SunOS 5.11 jom>y m>ent_20171026T003127Z), I've both /usr/bin/date +%s m>and m> /usr/xpg4/bin/date +%s` working. Combined with the POSIX.2 recommendation, I think this works on all Solaris too.
– Dereckson
Nov 5 '17 at 17:21
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Change date format in a Java string
...e. Read the java.text.SimpleDateFormat javadoc what the individual parts stm>and m>s for. So stm>and m>s for example M for months m>and m> m for minutes. Also, m>y m>ears exist of four digits m>y m>m>y m>m>y m>m>y m>, not five m>y m>m>y m>m>y m>m>y m>m>y m>. Look closer at the code snippets I posted here above.
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