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mysql - how many columns is too many?
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If I have one table have 15 cols, and another one have 300 cols, the primary key of the two tables are the same. Select one column in the two tables, will the performance significantly differ?
– an offer can't ref...
Elegant Python function to convert CamelCase to snake_case?
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For one instance, sure it's overkill. Across a larger application, no need to reinvent and obfuscate the wheel.
– Brad Koch
Dec 21 '15 at 22:47
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Slicing of a NumPy 2d array, or how do I extract an mxm submatrix from an nxn array (n>m)?
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As Sven mentioned, x[[[0],[2]],[1,3]] will give back the 0 and 2 rows that match with the 1 and 3 columns while x[[0,2],[1,3]] will return the values x[0,1] and x[2,3] in an array.
There is a helpful function for doing the first example...
What is SaaS, PaaS and IaaS? With examples
...of these services is concerned, they all are popular. It's just that which one fits into your requirements better. For example, if you want to have a Hadoop cluster on which you would run MapReduce jobs, you will find EC2 a perfect fit, which is IaaS. On the other hand if you have some application, ...
How to split a string into an array of characters in Python?
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If you want to process your String one character at a time. you have various options.
uhello = u'Hello\u0020World'
Using List comprehension:
print([x for x in uhello])
Output:
['H', 'e', 'l', 'l', 'o', ' ', 'W', 'o', 'r', 'l', 'd']
Using ma...
Array to String PHP?
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I like that this one keeps the keys. This is very useful for later use.
– Apolymoxic
Jul 16 '19 at 22:29
add a commen...
What's the name for hyphen-separated case?
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https://www.npmjs.com/package/kebab-case
https://vuejs.org/v2/guide/components-props.html#Prop-Casing-camelCase-vs-kebab-case
However, there are still other terms that people use. Lisp has used this convention for decades as described in this Wikipedia entry, so some people have described it as...
Google Maps v2 - set both my location and zoom in
My question is, does anyone know how to set google maps up, to open up both my location and in a zoomed-in view?
11 Answers...
How can I match multiple occurrences with a regex in JavaScript similar to PHP's preg_match_all()?
...e URLSearchParams, which does all of this for us, so no custom code, let alone regex, are necessary anymore.
– Mike 'Pomax' Kamermans
Browser support is listed here https://caniuse.com/#feat=urlsearchparams
I would suggest an alternative regex, using sub-groups to capture name and valu...
Can I set subject/content of email using mailto:?
...l-webmaster/mailto.htm
mailto subject example:
<a href="mailto:no-one@snai1mai1.com?subject=free chocolate">example</a>
mailto with content:
<a href="mailto:no-one@snai1mai1.com?subject=look at this website&body=Hi,I found this website and thought you might like ...