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Android SQLite: nullColumnHack parameter in insert/replace methods
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Let's suppose you have a table named foo where all columns either allow NULL values or have defaults.
In some SQL implementations, this would be valid SQL:
INSERT INTO foo;
That's not valid in SQLite. You have to have at least one column specified:
INSERT INTO foo (s...
How to swap two variables in JavaScript
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@derek - I think it's called array matching, a form of destructuring assignment.
– Ted Hopp
Apr 22 '16 at 14:31
4
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How do you implement an async action delegate method?
I am learning the Web API stack and I am trying to encapsulate all data in the form of a "Result" object with parameters such as Success and ErrorCodes.
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How do I make a textarea an ACE editor?
...function(){
textarea.val(editor.getSession().getValue());
});
or just call
textarea.val(editor.getSession().getValue());
only when you submit the form with the given textarea. I'm not sure whether this is the right way to use Ace, but it's the way it is used on GitHub.
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XPath - Selecting elements that equal a value
...the string value of an element as the concatenation (in document order) of all of its text-node descendents.
This explains the "strange results".
"Better" results can be obtained using the expressions below:
//*[text() = 'qwerty']
The above selects every element in the document that has at lea...
.NET List Concat vs AddRange
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They have totally different semantics.
AddRange modifies the list by adding the other items to it.
Concat returns a new sequence containing the list and the other items, without modifying the list.
Choose whichever one has the semantic...
XPath: How to check if an attribute exists?
...u should use a more specific expression. But with [@attributeName] you get all nodes which have that attribute.
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OpenSSL and error in reading openssl.conf file
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You can also set it as part of the computer's environmental variables so all users and services have it available by default. See, for example, Environment variables in Windows NT and How To Manage Environment Variables in Windows XP.
Now you can run openssl commands without having to pass the co...
CSS last-child selector: select last-element of specific class, not last child inside of parent?
...se this method to select the first-child of a class.
/* 1: Apply style to ALL instances */
#header .some-class {
padding-right: 0;
}
/* 2: Remove style from ALL instances except FIRST instance */
#header .some-class~.some-class {
padding-right: 20px;
}
This is actually applying the class to t...
How to remove .html from URL?
...overflow.com/a/9204355/3217306
Update: I was slightly mistaken, . matches all characters except newlines, so includes whitespace. Also, here is a helpful regex cheat sheet
Sources:
http://community.sitepoint.com/t/what-does-this-mean-rewritecond-request-filename-f-d/2034/2
https://mediatemple.ne...