CNTT | CNTT | Continuous Deployment library
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kandi X-RAY | CNTT Summary
CNTT
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of CNTT
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Trending Discussions on CNTT
QUESTION
My question is, how efficient are PHP Mysqli prepared statements? From what I have understand from basic reading, prepared statements 1) help in security using bound inputs 2) speed up and 'reduce' data sent to the server by somewhat 'pre-packaging' or 'preparing' the sql query to an extent, and once data is available, it just attaches the data to the prepared statement and executes it. This also helps on 'repeated' use of the same statement when inserting the same data (different values) repeatedly, because the statement is prepared only once.
Now, I am building a website with several functionalities, and all (or most) of them use JQuery and AJAX to get obtain user input, do some checks (either in the JS/JQ or in PHP), Send the data to a PHP file PHP_AJAX_Handler.php specified in the AJAX URL. The PHP file prepares the SQL statemtns to insert data into database, then return JSON success/failure messages. For example, most of my features/functionality are programmed as follows; below is one file which I am using to 1) check for existing continent-country pair, and 2) insert the new continent-country pair.
HTML:
...ANSWER
Answered 2020-Oct-29 at 13:06You said:
As you can see, the PHP file is turning out to be pretty long.
That is true, but that is not the fault of prepared statements. You must have been learning PHP development from a poorly written tutorial. This code does not need to be so long. In fact, it can be severely shortened.
Just fixing your existing code made it much more readable. I used OOP-style mysqli and I removed all these if
statements. You should enable error reporting instead.
QUESTION
I want to implement custom "at" method, which gives more informative exception if some key does not exists in some container (in particular vector/map/deque/unordered_map). However, in my project i have to do some casting of key types (i.e passing int variable as a key to std::map) and there is too much cases like this, so i can't modify client code in order to avoid it. And project settings set to trait all warnings as errors, so this cast fails my build because of possible loss of data. To avoid it, i need to cast passed key.
I wrote this:
...ANSWER
Answered 2020-Jul-21 at 16:43using CKeyType = ContainerTraits::KeyType;
should instead be:
using CKeyType = ContainerTraits::KeyType;
Also (typo):
const bool valueExist = IsExists(container, safeKey);
should be:
const bool valueExists = IsExists(container, safeKey);
But the most problematic line is this one:
const auto safeKey = reinterpret_cast(key);
since:
CKeyType
is notconst
- the cast fails if
CKeyType
is not a primitive type
The best replacement seems to be:
const auto& safeKey = static_cast(key);
although the restrictions of static_cast
may not suit your use case. reinterpret_cast
is too dangerous here.
QUESTION
Hi i write a code which has two function first function which convert simply from morse to text and second which get all the possible combination of words if there is no space between and it find recursively.
The problem is that the second function recursively get the possible combination works fine but the first function is not simple convert morse to plain text it throw the error.
this is my code :
...ANSWER
Answered 2020-Apr-20 at 10:31You need to change this line:
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On a UNIX-like operating system, using your system’s package manager is easiest. However, the packaged Ruby version may not be the newest one. There is also an installer for Windows. Managers help you to switch between multiple Ruby versions on your system. Installers can be used to install a specific or multiple Ruby versions. Please refer ruby-lang.org for more information.
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