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Rank function in MySQL
...arate SET command.
Test case:
CREATE TABLE person (id int, first_name varchar(20), age int, gender char(1));
INSERT INTO person VALUES (1, 'Bob', 25, 'M');
INSERT INTO person VALUES (2, 'Jane', 20, 'F');
INSERT INTO person VALUES (3, 'Jack', 30, 'M');
INSERT INTO person VALUES (4, 'Bill', 32, 'M'...
What is a higher kinded type in Scala?
...va 5 generics are first-order.
The first-order interpretation of the above characterizations of abstractions are:
A type constructor is a type that you can apply to proper type arguments to "construct" a proper type.
A value constructor is a value that you can apply to proper value arguments to "co...
How to read a CSV file into a .NET Datatable
...with "System.Linq.Enumerable+WhereSelectListIterator`2[System.Int32,System.Char]" rather than the name of the column. Any thoughts as to why?
– user3658298
Feb 22 '15 at 13:27
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Splitting String with delimiter
...
Oh, and be careful if you're splitting on certain characters like a pipe |. You will need to escape the char stackoverflow.com/questions/3842537/…
– Snekse
Dec 23 '15 at 17:19
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Javascript seconds to minutes and seconds
... ... modify (9<s?':':':0') to (10>s?':0':':') (adding 1 char but 'sacrificing' 5 out of 6 true-paths to false-paths) OR (10<=s?':':':0') (adding 2 chars but maintaining 5 out of 6 true paths). Then I advise to change that final trailing +s to +(s|0) instead of Math.floor(s), as...
What is the email subject length limit?
How many characters are allowed to be in the subject line of Internet email?
I had a scan of The RFC for email but could not see specifically how long it was allowed to be.
I have a colleague that wants to programmatically validate for it.
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Typedef function pointer?
...ld use the original type, for instance
typedef int myinteger;
typedef char *mystring;
typedef void (*myfunc)();
using them like
myinteger i; // is equivalent to int i;
mystring s; // is the same as char *s;
myfunc f; // compile equally as void (*f)();
As you can ...
Rails ActionMailer - format sender and recipient name/email address
...e the name and email, you can end up with an invalid From header by simply concatenating strings. Here is a safe way:
require 'mail'
address = Mail::Address.new email # ex: "john@example.com"
address.display_name = name.dup # ex: "John Doe"
# Set the From or Reply-To header to the following:
addr...
What reason is there to use null instead of undefined in JavaScript?
...eed to make different falsy checks. It would not be the last time that you concat a null object to a string and get a "null" as a string. Or passing a 0 as numeric value and wondering why the IF statement handles is t as a false.
– com2ghz
Feb 11 '16 at 9:29
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What does the 'L' in front a string mean in C++?
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It's a wchar_t literal, for extended character set. Wikipedia has a little discussion on this topic, and c++ examples.
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