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Cross-thread operation not valid: Control 'textBox1' accessed from a thread other than the thread it
...ectly in the serialport1_DataReceived method, use this pattern:
delegate void SetTextCallback(string text);
private void SetText(string text)
{
// InvokeRequired required compares the thread ID of the
// calling thread to the thread ID of the creating thread.
// If these threads are different...
How do I parse JSON with Objective-C?
...NSClassFromString(@"NSJSONSerialization"))
{
NSError *error = nil;
id object = [NSJSONSerialization
JSONObjectWithData:returnedData
options:0
error:&error];
if(error) { /* JSON was malformed, act appropriately here */...
Update or Insert (multiple rows and columns) from subquery in PostgreSQL
... as col2, t3.foobar as col3
FROM table2 t2 INNER JOIN table3 t3 ON t2.id = t3.t2_id
WHERE t2.created_at > '2016-01-01'
) AS subquery
WHERE table1.id = subquery.col1;
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Where and why do I have to put the “template” and “typename” keywords?
... that certain names aren't.
The "typename" keyword
The answer is: We decide how the compiler should parse this. If t::x is a dependent name, then we need to prefix it by typename to tell the compiler to parse it in a certain way. The Standard says at (14.6/2):
A name used in a template declar...
How to filter Pandas dataframe using 'in' and 'not in' like in SQL
...
Series.isin accepts various types as inputs. The following are all valid ways of getting what you want:
df['countries'].isin(c1)
0 False
1 True
2 False
3 False
4 True
Name: countries, dtype: bool
# `in` operation
df[df['countries'].isin(c1)]
countries
1 UK
4 Ch...
Safe String to BigDecimal conversion
...e it looks very odd when people have pointed out why your original answer didn't make any sense. :-)
– T.J. Crowder
Sep 20 '10 at 15:03
1
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Python `if x is not None` or `if not x is None`?
... of the if not x is None version to be more clear, but Google's style guide and PEP-8 both use if x is not None . Is there any minor performance difference (I'm assuming not), and is there any case where one really doesn't fit (making the other a clear winner for my convention)?*
...
Twitter Bootstrap - Tabs - URL doesn't change
...volved, I think it's neatest as a small jQuery plugin: https://github.com/aidanlister/jquery-stickytabs
You can call the plugin like so:
$('.nav-tabs').stickyTabs();
I've made a blog post for this, http://aidanlister.com/2014/03/persisting-the-tab-state-in-bootstrap/
...
Is there a CSS selector by class prefix?
...us-"] will match the following element, which may be undesirable:
<div id='D' class='foo-class foo-status-bar bar-class'></div>
If you can ensure that such a scenario will never happen, then you are free to use such a selector for the sake of simplicity. However, the combination above...
PostgreSQL Connection URL
... postgresql://localhost/mydb?user=other&password=secret did the trick
– Karuhanga
Oct 29 '18 at 14:31
1
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