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What does -z mean in Bash? [duplicate]
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Is -n redundant with the default behavior of if [ $2 ] or are there some differences?
– bbarker
Jan 18 '19 at 18:32
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What is the purpose of the reader monad?
...is so complex and seems to be useless. In an imperative language like Java or C++, there is no equivalent concept for the reader monad, if I am not mistaken.
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Change limit for “Mysql Row size too large”
...look at this article which explains a lot
about MySQL row sizes. It's important to note that even if you use
TEXT or BLOB fields, your row size could still be over 8K (limit for
InnoDB) because it stores the first 768 bytes for each field inline in
the page.
The simplest way to fix this...
entity object cannot be referenced by multiple instances of IEntityChangeTracker. while adding relat
... my contact, which is validated I get the exception "ADO.Net Entity Framework An entity object cannot be referenced by multiple instances of IEntityChangeTracker"
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How to create an alias for a command in Vim?
Vim is my preferred text editor when I program, and thus I always run into a particularly annoying issue.
7 Answers
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How to avoid reinstalling packages when building Docker image for Python projects?
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Try to build a Dockerfile which looks something like this:
FROM my/base
WORKDIR /srv
ADD ./requirements.txt /srv/requirements.txt
RUN pip install -r requirements.txt
ADD . /srv
RUN python setup.py install
ENTRYPOINT ["run_server"]
Docker will use cache during pip install as long as you do not ma...
How to avoid annoying error “declared and not used”
... it is a bit annoying that when compiling, I should not leave any variable or package unused.
8 Answers
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Read values into a shell variable from a pipe
...n that gets piped into, but no luck. What I mean is none of the following work:
15 Answers
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Ruby capitalize every word first letter
I need to make the first character of every word uppercase, and make the rest lowercase...
8 Answers
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Simplest way to wait some asynchronous tasks complete, in Javascript?
...this
var async = require('async');
var calls = [];
['aaa','bbb','ccc'].forEach(function(name){
calls.push(function(callback) {
conn.collection(name).drop(function(err) {
if (err)
return callback(err);
console.log('dropped');
callback...