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What does yield mean in PHP?
...n is effectively a more compact and efficient way to write an Iterator. It allows you to define a function (your xrange) that will calculate and return values while you are looping over it:
foreach (xrange(1, 10) as $key => $value) {
echo "$key => $value", PHP_EOL;
}
This would create t...
Remove not alphanumeric characters from string
...; i < json_string.length; i++) {
let char = json_string[i]
let index = alpha_numeric.indexOf(char)
if (index > -1) {
filterd_string += alpha_numeric[index]
}
}
return filterd_string
}
const input = "\\test\red\bob\fred\new"
console.log(alpha_numeric_filter(input)...
Unicode character in PHP string
... the \uxxxx Unicode syntax so you can use json_decode to work on an artifically created JSON string representation. I changed the wording though to have that clarified.
– Stefan Gehrig
May 19 '11 at 12:48
...
How to make asynchronous HTTP requests in PHP
Is there a way in PHP to make asynchronous HTTP calls? I don't care about the response, I just want to do something like file_get_contents() , but not wait for the request to finish before executing the rest of my code. This would be super useful for setting off "events" of a sort in my application...
difference between primary key and unique key
...erent for Primary and Unique Key.
By Default:
PK creates a Clustered index and UK creates a Non Clustered Index.
PK is not null, but UK allows nulls (Note: By Default)
There can only be one and only one PK on a table, but there can be multiple UK's
You can override the default implementation ...
What is a faster alternative to Python's http.server (or SimpleHTTPServer)?
... on [8080]
-a The host address to bind to [localhost]
-i Display directory index pages [True]
-s or --silent Silent mode won't log to the console
-h or --help Displays help message and exits
So to serve the current directory on port 8000, type:
http-server -p 8000
...
What Are the Differences Between PSR-0 and PSR-4?
...in src/Acme/Foo/Bar.php while in PSR-4 it will look for it in src/Bar.php, allowing for shorter directory structures. On the other hand some prefer to have the full directory structure to clearly see what is in which namespace, so you can also say that Acme\Foo\ is in src/Acme/Foo with PSR-4 which w...
Received an invalid column length from the bcp client for colid 6
...need to subtract 1 from it to get the value. After that it is used as the index of the _sortedColumnMappings ArrayList of the SqlBulkCopy instance not the index of the column mappings that were added to the SqlBulkCopy instance. One thing to note is that SqlBulkCopy will stop on the first error re...
Right way to reverse pandas.DataFrame?
...
data.reindex(index=data.index[::-1])
or simply:
data.iloc[::-1]
will reverse your data frame, if you want to have a for loop which goes from down to up you may do:
for idx in reversed(data.index):
print(idx, data.loc[idx, ...
How to shrink/purge ibdata1 file in MySQL
...oad a dump.
But you can configure MySQL so that each table, including its indexes, is stored as a separate file. In that way ibdata1 will not grow as large. According to Bill Karwin's comment this is enabled by default as of version 5.6.6 of MySQL.
It was a while ago I did this. However, to setup ...