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Printf width specifier to maintain precision of floating-point value
...o the necessary number of significant digits such that when scanning the string back in, the original floating point value is acquired?
...
Regular expression to check if password is “8 characters including 1 uppercase letter, 1 special cha
...ng one uppercase letter: You can use the [A-Z]+ regular expression. If the string contains at least one upper case letter, this regular expression will yield true.
One special character: You can use either the \W which will match any character which is not a letter or a number or else, you can use s...
PostgreSQL DISTINCT ON with different ORDER BY
...ll row that contains the most recent purchased product for each address_id and that result sorted by purchased_at then you're trying to solve a greatest N per group problem which can be solved by the following approaches:
The general solution that should work in most DBMSs:
SELECT t1.* FROM purcha...
Constructor of an abstract class in C#
...at class call the base constructor.
public abstract class A{
private string data;
protected A(string myString){
data = myString;
}
}
public class B : A {
B(string myString) : base(myString){}
}
...
How can I generate a unique ID in Python? [duplicate]
I need to generate a unique ID based on a random value.
8 Answers
8
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Does JSON syntax allow duplicate keys in an object?
...y bracket tokens surrounding zero or more name/value pairs.
A name is a string. A single colon token follows each name, separating the name from the value. A single
comma token separates a value from a following name.
It does not make any mention of duplicate keys being invalid or val...
How to use a variable for the database name in T-SQL?
...
Put the entire script into a template string, with {SERVERNAME} placeholders. Then edit the string using:
SET @SQL_SCRIPT = REPLACE(@TEMPLATE, '{SERVERNAME}', @DBNAME)
and then run it with
EXECUTE (@SQL_SCRIPT)
It's hard to believe that, in the course of...
WPF TemplateBinding vs RelativeSource TemplatedParent
...don't allow you to pass a Converter and don't automatically convert int to string for example (which is normal for a Binding).
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How to select html nodes by ID with jquery when the id contains a dot?
...iguity here
“#id.class” is a valid selector that requires both an id and a separate class to match; it's valid and not always totally redundant.
The correct way to select a literal ‘.’ in CSS is to escape it: “#id\.moreid”. This used to cause trouble in some older browsers (in particu...
Windows: How to specify multiline command on command prompt?
... used to escape the next character on the command line. (Like \ is used in strings.) Characters that need to be used in the command line as they are should have a ^ prefixed to them, hence that's why it works for the newline.
For reference the characters that need escaping (if specified as command ...