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What is the best way to determine the number of days in a month with JavaScript?
... @NoelWalters—you're correct that some browsers inocorrectly convert two digit years to dates in the 20th centry (so dates before 100 AD, not 1000 AD), however your fix doesn't rectify that in those browsers. The only way to reliably set two digit years is to use setFullYear: var d=new...
Modifying a subset of rows in a pandas dataframe
...
To replace multiples columns convert to numpy array using .values:
df.loc[df.A==0, ['B', 'C']] = df.loc[df.A==0, ['B', 'C']].values / 2
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improv...
Is Random class thread safe?
... instance of the Random class between multiple threads? And to call nextInt(int) from multiple threads in particular?
8...
Set selected item of spinner programmatically
...eCursorAdapter adapter = (SimpleCursorAdapter) spnr.getAdapter();
for (int position = 0; position < adapter.getCount(); position++) {
if(adapter.getItemId(position) == value) {
spnr.setSelection(position);
return;
}
}
}
You can use the above like:...
JavaScript - get the first day of the week from current date
...ay = new Date();
var day = today.getDay() || 7; // Get current day number, converting Sun. to 7
if( day !== 1 ) // Only manipulate the date if it isn't Mon.
today.setHours(-24 * (day - 1)); // Set the hours to day number minus 1
// mult...
How do I check if a string contains a specific word?
...will also return true for strings such as: fare, care, stare, etc. These unintended matches can simply be avoided in regular expression by using word boundaries.
A simple match for are could look something like this:
$a = 'How are you?';
if (preg_match('/\bare\b/', $a)) {
echo 'true';
}
On the...
Print array to a file
... } elseif($mixed === ""){
$mixed = "''";
}
//CONVERT STRINGS 'true', 'false' and 'null' TO true, false and null
//uncomment if needed
//elseif(!is_numeric($mixed) && !is_array($mixed) && !empty($mixed)){
// if($mixed != 'false' &...
Traverse a list in reverse order in Python
...merate() returns a generator and generators can't be reversed, you need to convert it to a list first.
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Initializing multiple variables to the same value in Java
... secondPerson = thirdPerson = new Person();
All the variables would be pointing to the same instance. Probably what you would need in that case is:
Person firstPerson = new Person();
Person secondPerson = new Person();
Person thirdPerson = new Person();
Or better yet use an array or a Collectio...
appearanceWhenContainedIn in Swift
I'm trying to convert my app to the Swift language.
11 Answers
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