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How to properly create composite primary keys - MYSQL
...is a gross oversimplification of an intense setup I am working with. table_1 and table_2 both have auto-increment surrogate primary keys as the ID. info is a table that contains information about both table_1 and table_2 .
...
How do I check in JavaScript if a value exists at a certain array index?
...his answer: stackoverflow.com/a/39171620/3120446
– dx_over_dt
Jul 9 '19 at 20:19
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Python nonlocal statement
...so that it looks more like the idioms of languages with closures.
def make_counter():
count = 0
def counter():
nonlocal count
count += 1
return count
return counter
Obviously, you could write this as a generator, like:
def counter_generator():
count = 0
...
Convert string to integer type in Go?
...64); err == nil {
fmt.Printf("i=%d, type: %T\n", i, i)
}
var i int
if _, err := fmt.Sscan(s, &i); err == nil {
fmt.Printf("i=%d, type: %T\n", i, i)
}
Output (if called with argument "123"):
i=123, type: int
i=123, type: int64
i=123, type: int
Parsing Custom strings
There is also a...
How to create streams from string in Node.Js?
... to wrap the string in an array.
https://nodejs.org/api/stream.html#stream_stream_readable_from_iterable_options
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How do I declare class-level properties in Objective-C?
...natomic' version? Also i would consider naming the backing variables with '_' as is default by apple and also improves readability since returning/setting self.value from the getter/setter causes infinite recursion. In my opinion this is the right answer.
– Peter Segerblom
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What's the difference between eval, exec, and compile?
...n Python is whatever you can have as the value in a variable assignment:
a_variable = (anything you can put within these parentheses is an expression)
eval returns the value of the given expression, whereas exec ignores the return value from its code, and always returns None (in Python 2 it is a s...
Log4net rolling daily filename with date in the file name
...up using (note the '.log' filename and the single quotes around 'myfilename_'):
<rollingStyle value="Date" />
<datePattern value="'myfilename_'yyyy-MM-dd"/>
<preserveLogFileNameExtension value="true" />
<staticLogFileName value="false" />
<file type="log4net.Uti...
How do I auto size a UIScrollView to fit its content
...
Or just do: int y = CGRectGetMaxY(((UIView*)[_scrollView.subviews lastObject]).frame); [_scrollView setContentSize:(CGSizeMake(CGRectGetWidth(_scrollView.frame), y))];
– Gal
Jul 10 '13 at 13:33
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Pick any kind of file via an Intent in Android
...s simply thing works in my case..
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType("file/*");
startActivityForResult(intent, PICKFILE_REQUEST_CODE);
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