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Why create “Implicitly Unwrapped Optionals”, since that implies you know there's a value?
Why would you create a "Implicitly Unwrapped Optional" vs creating just a regular variable or constant?
If you know that it can be successfully unwrapped then why create an optional in the first place?
For example, why is this:
...
Chrome Dev Tools: How to trace network for a link that opens a new tab?
...
I wish I could upvote this twice. I've made a content script for chrome that does this on a hotkey, and it literally saved hours of my life.
– polkovnikov.ph
Aug 4 '16 at 11:23
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Better way to check variable for null or empty string?
...sses and fall back to it. It sounds far more work that hacking a quick PHP script (and it is the first time), but it's reusable, flexible, and much less error prone since form validation with usual PHP tends to quickly become spaguetti code.
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NPM global install “cannot find module”
... true, '/opt/lib/node_modules', true, '/opt/lib/node_modules' ]
[cut]
My script fails on require('promised-io/promise'):
[neek@uberneek project]$ node buildscripts/stringsmerge.js
module.js:340
throw err;
^
Error: Cannot find module 'promised-io/promise'
at Function.Module._re...
Have the same README both in Markdown and reStructuredText
... lambda f: open(f, 'r').read()
setup(
# name, version, ...
long_description=read_md('README.md'),
install_requires=[]
)
This will automatically convert README.md to RST for the long description using on PyPi. When pypandoc is not available, then it just reads README.md without the con...
How do I replace NA values with zeros in an R dataframe?
..., forLp_Sbst doesn't seem like a way anyone should consider approaching it vs forLp_smplfSbst
– Frank
Mar 7 '17 at 18:23
1
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How to mkdir only if a directory does not already exist?
I am writing a shell script to run under the KornShell (ksh) on AIX. I would like to use the mkdir command to create a directory. But the directory may already exist, in which case I do not want to do anything. So I want to either test to see that the directory does not exist, or suppress the "Fil...
Get MIME type from filename extension
... {".afm", "application/octet-stream"},
{".ai", "application/postscript"},
{".aif", "audio/x-aiff"},
{".aifc", "audio/aiff"},
{".aiff", "audio/aiff"},
{".air", "application/vnd.adobe.air-application-installer-package+zip"},
{".amc", "application/x-mp...
gulp command not found - error after installing gulp
...ly in the project.
npm install gulp
Add below line in your package.json
"scripts": {
"gulp": "gulp"
}
Run gulp.
npm run gulp
This worked for me.
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Shell one liner to prepend to a file
...time. Such fun.
The solution exploits the exact implementation of file descriptors on your system and, because implementation varies significantly between nixes, it's success is entirely system dependent, definitively non-portable, and should not be relied upon for anything even vaguely important....