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MongoDB atomic “findOrCreate”: findOne, insert if nonexistent, but do not update
as the title says, I want to perform a find (one) for a document, by _id, and if doesn't exist, have it created, then whether it was found or was created, have it returned in the callback.
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html5 localStorage error with Safari: “QUOTA_EXCEEDED_ERR: DOM Exception 22: An attempt was made to
... this is by design. When Safari (OS X or iOS) is in private browsing mode, it appears as though localStorage is available, but trying to call setItem throws an exception.
store.js line 73
"QUOTA_EXCEEDED_ERR: DOM Exception 22: An attempt was made to add something to storage that exceeded the quota....
Play an audio file using jQuery when a button is clicked
I am trying to play an audio file when I click the button, but it's not working, my html code is:
6 Answers
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Correct way to add external jars (lib/*.jar) to an IntelliJ IDEA project
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edited Jul 14 at 16:31
Jerry Chong
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Passing parameters to a Bash function
...and...
}
or
function_name () {
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}
To call a function with arguments:
function_name "$arg1" "$arg2"
The function refers to passed arguments by their position (not by name), that is $1, $2, and so forth. $0 is the name of the script itself.
Example:
function_name () {
echo...
UIScrollView not scrolling
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It's always good to show a complete working code snippet:
// in viewDidLoad (if using Autolayout check note below):
UIScrollView *myScrollView;
UIView *contentView;
// scrollview won't scroll unless content size explicitly ...
How to fix 'android.os.NetworkOnMainThreadException'?
...s thrown when an application attempts to perform a networking operation on its main thread. Run your code in AsyncTask:
class RetrieveFeedTask extends AsyncTask<String, Void, RSSFeed> {
private Exception exception;
protected RSSFeed doInBackground(String... urls) {
try {
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PHP - Get bool to echo false when false
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echo $bool_val ? 'true' : 'false';
Or if you only want output when it's false:
echo !$bool_val ? 'false' : '';
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How to Vertical align elements in a div?
I have a div with two images and an h1 . All of them need to be vertically aligned within the div, next to each other.
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Change IPython/Jupyter notebook working directory
When I open a Jupyter notebook (formerly IPython) it defaults to C:\Users\USERNAME .
31 Answers
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