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MongoDB with redis
...mediately send it back over to mongoose. There is no indices here, no full table scan, nothing.
We are doing a simple lookup to say has this query been executed? Yes? Okay, take the request and send it back immediately and don’t send anything to mongo.
We have the mongoose server, the cache serv...
MongoDB: Combine data from multiple collections into one..how?
... Thanks, Dave. I used this technique for generating export and reporting tables for a high traffic site in production for the last 3 months without issue. Here's another article that describes a similar use of the technique: tebros.com/2011/07/…
– rmarscher
...
What does the brk() system call do?
...does stuff (after I drew it I discovered that Linux actually puts the executable much closer to address zero than I thought it did, and the shared libraries at surprisingly high addresses). The black regions of this diagram are unmapped -- any access causes an immediate segfault -- and they are giga...
Insert code into the page context using a content script
...eed to use DOMContentLoaded event inside the exposed code to wait for DOM.
Table of contents
Method 1: Inject another file
Method 2: Inject embedded code
Method 2b: Using a function
Method 3: Using an inline event
Dynamic values in the injected code
Method 1: Inject another file
This is the easies...
PUT vs. POST in REST
...ey are completely similar. Think of it as inserting the same row in the DB table (/expense-reports) with auto-incremented primary key. Data remains the same, key (URI in this case) is generated by server and is different for every other insert (request). So, POST effect can be idempotent, but also m...
What's the difference between using “let” and “var”?
...s that the scope of a var variable is the entire enclosing function
This table on Wikipedia shows which browsers support Javascript 1.7.
Note that only Mozilla and Chrome browsers support it. IE, Safari, and potentially others don't.
...
What is the effect of extern “C” in C++?
...
11: 0000000000000000 0 NOTYPE GLOBAL DEFAULT UND _GLOBAL_OFFSET_TABLE_
12: 0000000000000000 0 NOTYPE GLOBAL DEFAULT UND _Z1gv
13: 0000000000000000 0 NOTYPE GLOBAL DEFAULT UND eg
Interpretation
We see that:
ef and eg were stored in symbols with the same name as in ...
How do I daemonize an arbitrary script in unix?
...
You can daemonize any executable in Unix by using nohup and the & operator:
nohup yourScript.sh script args&
The nohup command allows you to shut down your shell session without it killing your script, while the & places your script in t...
How exactly does the “Specific Version” property of an assembly reference work in Visual Studio?
...ersion information:
<Reference Include="Foo">
[...]
The following table shows when the "Specific Version" check is performed, and when it is not.
| Version information
| Present Not present
----------------------------+----...
What algorithm does Readability use for extracting text from URLs?
...ere are cases where the "main content" is something else, e.g. an image, a table, a video etc. The algorithms won't work well for such cases.
Cheers,
Christian
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