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In which scenario do I use a particular STL container?
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You now have unordered_map and unordered_set (and their multi variants) which are not in the flow chart but are good picks when you don't care about order but need to find elements by key. Their lookup is usually O(1) instead of O(log n).
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Request is not available in this context
... will also need some additional configuration on your log4net appenders in order for them to log your custom data.
This solution can be easily implemented as a custom log enhancement module. Here is sample code for it:
using System;
using System.Web;
using log4net;
using log4net.Core;
namespace Y...
How to evaluate a math expression given in string form?
...described wiki.The logic of this algoritm starting from rules of operation orders. 1. operator sign | variable evaluation | function call | parenthesis (sub-expressions); 2. exponentiation; 3. multiplication, division; 4. addition, subtraction;
– Vasile Bors
J...
SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed
... that is trying to verify the SSL certification: SSL_CERT_FILE=/opt/local/etc/certs/cacert.pem rails generate jquery:install. In your case, you want to either set this as an environment variable somewhere the server picks it up or add something like ENV['SSL_CERT_FILE'] = /path/to/your/new/cacert.p...
Git: Find the most recent common ancestor of two branches
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which is enough if the current branch is feature.
Finally, remember that order matters! Doing git diff feature...master will show changes that are on master not on feature.
I wish more git commands would support that syntax, but I don't think they do. And some even have different semantics for .....
What's the purpose of SQL keyword “AS”?
...ProductRetailPrice,
O.Quantity
FROM Products AS P
LEFT OUTER JOIN Orders AS O ON O.ProductID = P.ProductID
WHERE O.OrderID = 123456
Example 3
It's a good practice to use the AS keyword, and very recommended, but it is possible to perform the same query without one (and I do often).
SELE...
What's the difference between SoftReference and WeakReference in Java?
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In Java; order from strongest to weakest, there are: Strong, Soft, Weak and Phantom
A Strong reference is a normal reference that protects the referred object from collection by GC. i.e. Never garbage collects.
A Soft reference i...
How to keep indent for second line in ordered lists via CSS?
...ms, and need consistent vertical spacing, the solution is to add vertical border-spacing to the ol selector, e.g. border-spacing: 0 3px; Normal padding on the table-cell does not work because the number is always only one line.
– RemBem
Nov 12 '15 at 13:42
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Linq to Entities join vs groupjoin
... outer join in LINQ is a GroupJoin, flattened by SelectMany.
2. Preserving order
Suppose the list of parents is a bit longer. Some UI produces a list of selected parents as Id values in a fixed order. Let's use:
var ids = new[] { 3,7,2,4 };
Now the selected parents must be filtered from the parents...
server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none
...class3.crt
sudo update-ca-certificates
git config --global http.sslCAinfo /etc/ssl/certs/ca-certificates.crt
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