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Creating a dictionary from a csv file?
...
You have to just convert csv.reader to dict:
~ >> cat > 1.csv
key1, value1
key2, value2
key2, value22
key3, value3
~ >> cat > d.py
import csv
with open('1.csv') as f:
d = dict(filter(None, csv.reader(f)))
print(d)
~ ...
Why does appending “” to a String save memory?
...owing:
data.substring(x, y) + ""
creates a new (smaller) String object, and throws away the reference to the String created by substring(), thus enabling garbage collection of this.
The important thing to realise is that substring() gives a window onto an existing String - or rather, the charac...
How to output MySQL query results in CSV format?
...@Flimm, assuming you don't have embedded commas/tabs in the fields you can convert it by piping the result into | sed 's/\t/,/g'
– John Carter
Nov 10 '11 at 4:42
113
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What is this operator in MySQL?
...a' <=> NULL)
Based on this, your particular query (fragment) can be converted to the more portable:
WHERE p.name IS NULL
Support
The SQL:2003 standard introduced a predicate for this, which works exactly like MySQL's <=> operator, in the following form:
IS [NOT] DISTINCT FROM
The fol...
Proper way to return JSON using node or Express
...'/', (req, res) => res.json({ answer: 42 }));
The res.json() function converts the parameter you pass to JSON using JSON.stringify() and sets the Content-Type header to application/json; charset=utf-8 so HTTP clients know to automatically parse the response.
...
How to fix the datetime2 out-of-range conversion error using DbContext and SetInitializer?
I'm using the DbContext and Code First APIs introduced with Entity Framework 4.1.
14 Answers
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Add swipe to delete UITableViewCell
...
if (editingStyle == UITableViewCellEditingStyle.Delete) {
// handle delete (by removing the data from your array and updating the tableview)
}
}
Swift 3.0:
override func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool {
return true
}
overrid...
MVC Razor view nested foreach's model
...e problem.
There are three things that you have at least a cursory understanding before you can resolve this issue. I have
to admit that I cargo-culted this
for a long time when I started working with the framework. And it took me quite a while
to really get what was going on.
Those three things ...
Find in Files: Search all code in Team Foundation Server
...ilter used for C# files (text) was not giving the results we wanted, so we convert source files to .htm files. We can now add additional meta-data to the files such as:
Author (we define it as the person that last checked in the file)
Color coding (on our todo-list)
Number of changes indicating po...
How to lock compiled Java classes to prevent decompilation?
...
You have not read the post I linked to. The bytecode is converted to the dongle's CPU code and encrypted. When the end user runs the protected app, that encrypted code is transferred to the "dongle". The dongle decrypts and runs it on its CPU.
– Dmitry Leskov...