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Is it safe to remove selected keys from map within a range loop?
...r key := range m {
if key.expired() {
delete(m, key)
}
}
And the language specification:
The iteration order over maps is not specified and is not guaranteed to be the same from one iteration to the next. If map entries that have not yet been reached are removed during iteratio...
How can I reverse the order of lines in a file?
...
BSD tail:
tail -r myfile.txt
Reference: FreeBSD, NetBSD, OpenBSD and OS X manual pages.
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How to enumerate an object's properties in Python?
...). Setting values directly on the dictionary bypasses the object's setter (and/or its parents'). It's quite common in python that more things than meet the eye are happening in the background during attribute setting (e.g. sanitation), using setattr() ensures that you don't miss out, or are forced t...
Xcode Simulator: how to remove older unneeded devices?
...quit xcode so you are forced to install again.
– Alejandro Luengo
Jan 16 '13 at 9:17
That's right Alejandro, Apple see...
MySQL error code: 1175 during UPDATE in MySQL Workbench
...update the column visited to give it the value 1. I use MySQL workbench, and I'm writing the statement in the SQL editor from inside the workbench. I'm writing the following command:
...
Local dependency in package.json
...encies": {
"somelocallib": "0.0.x"
}
Then run npm link ../somelocallib and npm will install the version you're working on as a symlink.
app@0.0.1 /private/tmp/app
└── somelocallib@0.0.1 -> /private/tmp/somelocallib
Reference: link(1)
...
How to write to a file, using the logging Python module?
...
An example of using logging.basicConfig rather than logging.fileHandler()
logging.basicConfig(filename=logname,
filemode='a',
format='%(asctime)s,%(msecs)d %(name)s %(levelname)s %(message)s',
datefmt='%H:...
How to replace an item in an array with Javascript?
... 5346];
You can also use the ~ operator if you are into terse JavaScript and want to shorten the -1 comparison:
var index = items.indexOf(3452);
if (~index) {
items[index] = 1010;
}
Sometimes I even like to write a contains function to abstract this check and make it easier to understand w...
How to Set Variables in a Laravel Blade Template
I'm reading the Laravel Blade documentation and I can't figure out how to assign variables inside a template for use later. I can't do {{ $old_section = "whatever" }} because that will echo "whatever" and I don't want that.
...
How to find index of list item in Swift?
...
As swift is in some regards more functional than object-oriented (and Arrays are structs, not objects), use the function "find" to operate on the array, which returns an optional value, so be prepared to handle a nil value:
let arr:Array = ["a","b","c"]
find(arr, "c")! // 2
fi...