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How to decide font color in white or black depending on background color?
... have the intensities for the individual colors, you can determine the overall intensity of the color and choose the corresponding text.
if (red*0.299 + green*0.587 + blue*0.114) > 186 use #000000 else use #ffffff
The threshold of 186 is based on theory, but can be adjusted to taste. Based on ...
Advantages of using display:inline-block vs float:left in CSS
Normally, when we want to have multiple DIVs in a row we would use float: left , but now I discovered the trick of display:inline-block
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Stop Mongoose from creating _id property for sub-document array items
If you have subdocument arrays, Mongoose automatically creates ids for each one. Example:
6 Answers
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Cannot push to Git repository on Bitbucket
...ent every time you run GitBash:
$ cat ~/.bashrc
If you see a function called start_agent, this step has already been completed.
If no file, continue.
If there is a file that does not contain this function, you're in a sticky situation. It's probably safe to append to it (using the instructions ...
How can I list (ls) the 5 last modified files in a directory?
I know ls -t will list all files by modified time. But how can I limit these results to only the last n files?
5 Answe...
Broadcast receiver for checking internet connection in android app
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Answer to your first question: Your broadcast receiver is being called two times because
You have added two <intent-filter>
Change in network connection :
<action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
Change in WiFi state:
<action android:name="android....
javascript: recursive anonymous function?
...mentations of Javascript. (note — that's a fairly old comment; some/many/all of the problems described in Kangax's blog post may be fixed in more modern browsers.)
When you give a name like that, the name is not visible outside the function (well, it's not supposed to be; that's one of the weirdn...
How does a “stack overflow” occur and how do you prevent it?
...g you pop off the stack will be 'B', and the next thing is 'A'.
When you call a function in your code, the next instruction after the function call is stored on the stack, and any storage space that might be overwritten by the function call. The function you call might use up more stack for its ow...
What are rvalues, lvalues, xvalues, glvalues, and prvalues?
...e they needed? Probably not if we wish to forfeit the new features. But to allow better optimization we should probably embrace them.
Quoting n3055:
An lvalue (so-called, historically,
because lvalues could appear on the
left-hand side of an assignment
expression) designates a function or
an obj...
Why are C# 3.0 object initializer constructor parentheses optional?
It seems that the C# 3.0 object initializer syntax allows one to exclude the open/close pair of parentheses in the constructor when there is a parameterless constructor existing. Example:
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