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Can I use a function for a default value in MySql?
...ving a DEFAULT value. How would one change this answer to only set the key if the value was NULL?
– ToolmakerSteve
Apr 1 '15 at 17:38
1
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Can I use a :before or :after pseudo-element on an input field?
...the :after CSS pseudo-element on an input field, but it does not work. If I use it with a span , it works OK.
19 Answ...
What do querySelectorAll and getElementsBy* methods return?
...e unique and thus the function always returns exactly one element (or null if none was found).
However, getElementsByClassName(), querySelectorAll(), and other getElementsBy* methods return an array-like collection of elements. Iterate over it like you would with a real array:
var elems = document...
Getting RAW Soap Data from a Web Reference Client running in ASP.net
...on/off for debugging purposes. Here is an example that I have found and modified for my own use, in my case the logging was done by log4net but you can replace the log methods with your own.
public class SoapLoggerExtension : SoapExtension
{
private static readonly ILog log = LogManager.GetLogg...
CMake link to external library
... of a link-directory. Something like:
# Your-external "mylib", add GLOBAL if the imported library is located in directories above the current.
add_library( mylib SHARED IMPORTED )
# You can define two import-locations: one for debug and one for release.
set_target_properties( mylib PROPERTIES IMPOR...
window.onload vs $(document).ready()
What are the differences between JavaScript's window.onload and jQuery's $(document).ready() method?
16 Answers
...
How to delete a character from a string using Python
...te a new string. You have a few options of how to create the new string. If you want to remove the 'M' wherever it appears:
newstr = oldstr.replace("M", "")
If you want to remove the central character:
midlen = len(oldstr)/2 # //2 in python 3
newstr = oldstr[:midlen] + oldstr[midlen+1:]
Yo...
Ruby 'require' error: cannot load such file
...
Just do this:
require_relative 'tokenizer'
If you put this in a Ruby file that is in the same directory as tokenizer.rb, it will work fine no matter what your current working directory (CWD) is.
Explanation of why this is the best way
The other answers claim you sho...
How to remove leading and trailing white spaces from a given html string?
...regex approach. The trim method is effectively just an alias for a regex:
if(!String.prototype.trim) {
String.prototype.trim = function () {
return this.replace(/^\s+|\s+$/g,'');
};
}
... this will inject the method into the native prototype for those browsers who are still swimm...
Learning to write a compiler [closed]
...ages using C# 4.0
Interpreter pattern (described in Design Patterns $) specifies a way to evaluate sentences in a language
Language Implementation Patterns: Create Your Own Domain-Specific and General Programming Languages $
Let's Build a Compiler by Jack Crenshaw — The PDF ¶ version (examples ar...