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What C++ Smart Pointer Implementations are available?
...inter when the last reference of the last shared pointer goes out of scope then the object will be deleted appropriately. These are also thread safe and can handle incomplete types in most cases. std::make_shared can be used to efficiently construct a std::shared_ptr with one heap allocation using t...
How to create an array for JSON using PHP?
... array('power' => trim("Some value"), 'time' => "time here" );
And then encode the array with json encode function
json_encode(array('newvalue'=> $array), 200)
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Sankey Diagrams in R?
...if you could adjust looses arrows so they are oriented horizontally rather then vertically. Otherwise, why my solution fixes the problem with labels orientation, it doesn't make the diagram much more readable...
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How to create a directory using Ansible
... all answers here, there is lot of situations when you need to create more then one directory so it is a good idea to use loops instead creating separate task for each directory.
- name: Creates directory
file:
path: "{{ item }}"
state: directory
with_items:
- /srv/www
- /dir/foo
...
How to extract a substring using regex
...ons lang to your project (http://commons.apache.org/proper/commons-lang/), then use:
String dataYouWant = StringUtils.substringBetween(mydata, "'");
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Move capture in lambda
...aptured variable as an argument. When lambda is used as a function object, then all arguments that are passed to it will be forwarded to the internal lambda as arguments after the captured variable. (In our case there are no further arguments to be forwarded). Essentially, the same as in the previou...
How to query SOLR for empty fields?
... should use a default value
<field ... default="EMPTY" />
and then query for this default value.
This is much more efficient than q=-id:["" TO *]
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Recommended method for escaping HTML in Java
...
If webpage has UTF-8 encoding then all we need is Guava's htmlEscaper that escapes only the following five ASCII characters: '"&<>. The Apache's escapeHtml() also replaces non-ASCII characters including accents which seems unnecessary with UTF...
MongoDb query condition on comparing 2 fields
...e the left hand side of the condition (take all fields to left hand side). Then use $match to compare with a constant and filter. This way you avoid javascript execution. Below is my test in python:
import pymongo
from random import randrange
docs = [{'Grade1': randrange(10), 'Grade2': randrange(1...
Formatting numbers (decimal places, thousands separators, etc) with CSS
... to do so is combo of setting a span with a class denoting your formatting then use Jquery .each to do formatting on the spans when the DOM is loaded...
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