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Check whether a string contains a substring
How can I check whether a given string contains a certain substring, using Perl?
3 Answers
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Android - print full exception backtrace to log
... an Exception that is provided as the third parameter. For example
Log.d(String tag, String msg, Throwable tr)
where tr is the Exception.
According to this comment those Log methods "use the getStackTraceString() method ... behind the scenes" to do that.
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Convert decimal to binary in python [duplicate]
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"{0:b}".format(int)
Starting with Python 3.6 you can also use formatted string literal or f-string, --- PEP:
f"{int:b}"
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NSString: isEqual vs. isEqualToString
What is the difference between isEqual: and isEqualToString: ?
5 Answers
5
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How do I change the color of the text in a UIPickerView under iOS 7?
...in the delegate method that is more elegant:
Objective-C:
- (NSAttributedString *)pickerView:(UIPickerView *)pickerView attributedTitleForRow:(NSInteger)row forComponent:(NSInteger)component
{
NSString *title = @"sample title";
NSAttributedString *attString =
[[NSAttributedString ...
How can I define an interface for an array of objects with Typescript?
...nterface EnumServiceGetOrderBy {
[index: number]: { id: number; label: string; key: any };
}
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How does “cat
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This is called heredoc format to provide a string into stdin. See https://en.wikipedia.org/wiki/Here_document#Unix_shells for more details.
From man bash:
Here Documents
This type of redirection instructs the shell to read input from
the current source u...
How to convert strings into integers in Python?
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int() is the Python standard built-in function to convert a string into an integer value. You call it with a string containing a number as the argument, and it returns the number converted to an integer:
print (int("1") + 1)
The above prints 2.
If you know the structure of your li...
Manipulate a url string by adding GET parameters
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Basic method
$query = parse_url($url, PHP_URL_QUERY);
// Returns a string if the URL has parameters or NULL if not
if ($query) {
$url .= '&category=1';
} else {
$url .= '?category=1';
}
More advanced
$url = 'http://example.com/search?keyword=test&category=1&tags[]=fun&...
Using python's eval() vs. ast.literal_eval()?
...al() only considers a small subset of Python's syntax to be valid:
The string or node provided may only consist of the following Python literal structures: strings, numbers, tuples, lists, dicts, booleans, and None.
Passing __import__('os').system('rm -rf /a-path-you-really-care-about') into a...