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Will writeToFile:atomically: overwrite data?
Really simple question but it doesn't seem to be clear in Apple's docs.
2 Answers
2
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INSERT IF NOT EXISTS ELSE UPDATE?
I've found a few "would be" solutions for the classic "How do I insert a new record or update one if it already exists" but I cannot get any of them to work in SQLite.
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How to get unique values in an array
...de an example that uses no libraries. This requires two new prototype functions, contains and unique
Array.prototype.contains = function(v) {
for (var i = 0; i < this.length; i++) {
if (this[i] === v) return true;
}
return false;
};
Array.prototype.unique = function() {
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How to set UICollectionViewDelegateFlowLayout?
A UIViewController maintains a reference to a UICollectionView. The controller should modify the built-in flow layout using the UICollectionViewDelegateFlowLayout.
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ssl_error_rx_record_too_long and Apache SSL [closed]
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The link mentioned by Subimage was right on the money for me. It suggested changing the virtual host tag, ie, from <VirtualHost myserver.example.com:443> to <VirtualHost _default_:443>
Error code: ssl_error_rx_record_too_...
Iterate a list as pair (current, next) in Python
...h a and b can traverse the original iterator independently - the izip function takes the two iterators and makes pairs of the returned elements, advancing both iterators at the same pace.
One caveat: the tee() function produces two iterators that can advance independently of each other, but it come...
How to dynamically change a web page's title?
...ching the view he's on. For most web-apps etc. it seems like a good sollution to keep using this. I might have overlooked a different function though?
– Mathijs Segers
Aug 7 '13 at 8:55
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How to convert an Stream into a byte[] in C#? [duplicate]
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Call next function like
byte[] m_Bytes = StreamHelper.ReadToEnd (mystream);
Function:
public static byte[] ReadToEnd(System.IO.Stream stream)
{
long originalPosition = 0;
if(stream.CanSeek)
{
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How to Generate unique file names in C#
...le threads/processes). This makes it not suitable for temp filename generation. Generating X..1..N may be suitable for user-facing tasks (ie. copy in Explorer), but is dubious for server work.
– user2864740
May 24 '18 at 16:57
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Can pandas automatically recognize dates?
...to be defined manually. In such a case you can also add a date parser function, which is the most flexible way possible.
Suppose you have a column 'datetime' with your string, then:
from datetime import datetime
dateparse = lambda x: datetime.strptime(x, '%Y-%m-%d %H:%M:%S')
df = pd.read_csv(infile...