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Amazon SimpleDB vs Amazon DynamoDB
... workloads that require query flexibility. Amazon SimpleDB
automatically indexes all item attributes and thus supports query
flexibility at the cost of performance and scale.
So it's a trade off between performance/scalability and simplicity/flexibility, i.e. for simpler scenarios it might sti...
Different ways of adding to Dictionary
...can check this out by opening the class in Reflector.net
This is the This indexer:
public TValue this[TKey key]
{
get
{
int index = this.FindEntry(key);
if (index >= 0)
{
return this.entries[index].value;
}
ThrowHelper.ThrowKeyNotFound...
How to reset a single table in rails?
...
To reset the index/primary key in SQLite just type:
$ rails console
> ActiveRecord::Base.connection.execute("DELETE from sqlite_sequence where name = 'yourtablename'")
...
Is there a “previous sibling” selector?
...ing selector can be simulated in CSS using the flex order property.
The z-index Myth
Another long-standing belief has been that z-index works only on positioned elements.
In fact, the most current version of the spec – the W3C Editor's Draft – still asserts this to be true:
9.9.1 Specifyi...
How to get CRON to call in the correct PATHs
I'm trying to get cron to call in the correct PATHs. When I run a Python script from shell the script runs fine as it uses the PATHs set in bashrc but when I use cron all the PATHs are not used from bashrc. Is there a file I can enter the PATHs into for cron like bashrc or a way to call the PATHs fr...
MyISAM versus InnoDB [closed]
...
InnoDB has full text indexes in MySQL 5.6, but so far, they aren't really ready for production use.
– Bill Karwin
Jul 17 '13 at 17:39
...
Maximum size of an Array in Javascript
...
No need to trim the array, simply address it as a circular buffer (index % maxlen). This will ensure it never goes over the limit (implementing a circular buffer means that once you get to the end you wrap around to the beginning again - not possible to overrun the end of the array).
For ex...
Check if an element is present in an array [duplicate]
... // false
[1, 2, 3].includes(1, 2); // false (second parameter is the index position in this array at which to begin searching)
As of JULY 2018, this has been implemented in almost all major browsers, if you need to support IE a polyfill is available.
Edit: Note that this returns false if th...
how to use python to execute a curl command
...
It seems there's a small typo in the headers, which should read 'Accept-Charset': 'UTF-8'
– Stephen Lead
Feb 4 '16 at 2:25
1
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How do I get the filepath for a class in Python?
...go app pattern is:
/project
/appname
models.py
views.py
/templates
index.html
etc.
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