How can I send an email using PHP?
It’s possible using PHP’s mail() function. Remember the mail function will not work on a local server. Reference: mail
What is the maximum recursion depth in Python, and how to increase it?
It is a guard against a stack overflow, yes. Python (or rather, the CPython implementation) doesn’t optimize tail recursion, and unbridled recursion causes stack overflows. You can check the recursion limit with sys.getrecursionlimit: and change the recursion limit with sys.setrecursionlimit: but doing so is dangerous — the standard limit is a little conservative, but Python … Read more
Remove all whitespace in a string
If you want to remove leading and ending spaces, use str.strip(): If you want to remove all space characters, use str.replace(): (NB this only removes the “normal” ASCII space character ‘ ‘ U+0020 but not any other whitespace) If you want to remove duplicated spaces, use str.split():
TypeError: Converting circular structure to JSON in nodejs
JSON doesn’t accept circular objects – objects which reference themselves. JSON.stringify() will throw an error if it comes across one of these. The request (req) object is circular by nature – Node does that. In this case, because you just need to log it to the console, you can use the console’s native stringifying and … Read more
ERROR 1045 (28000): Access denied for user ‘root’@’localhost’ (using password: YES)
Note: For MySQL 5.7+, please see the answer from Lahiru to this question. That contains more current information. For MySQL < 5.7: The default root password is blank (i.e., an empty string), not root. So you can just log in as: You should obviously change your root password after installation: In most cases you should … Read more
numpy: Invalid value encountered in true_divide
You may have a NAN, INF, or NINF floating around somewhere. Try this: If one or both of those returns False, that’s likely the cause of the runtime error.
Your CPU supports instructions that this TensorFlow binary was not compiled to use: AVX AVX2
What is this warning about? Modern CPUs provide a lot of low-level instructions, besides the usual arithmetic and logic, known as extensions, e.g. SSE2, SSE4, AVX, etc. From the Wikipedia: Advanced Vector Extensions (AVX) are extensions to the x86 instruction set architecture for microprocessors from Intel and AMD proposed by Intel in March 2008 and … Read more
Python SyntaxError :’return’ outside function
Compiler showed: Where was I wrong? What about this?
What is JSONP, and why was it created?
It’s actually not too complicated… Say you’re on domain example.com, and you want to make a request to domain example.net. To do so, you need to cross domain boundaries, a no-no in most of browserland. The one item that bypasses this limitation is <script> tags. When you use a script tag, the domain limitation is … Read more
Error : Cannot read property ‘map’ of undefined
First of all, set more safe initial data: And ensure your ajax data. It should work if you follow above two instructions like Demo. Updated: you can just wrap the .map block with conditional statement.