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Unable to create/open lock file: /data/mongod.lock errno:13 Permission denied
How to I get mongo to use a mounted drive on ec2? I really do not understand. I attached a volume on ec2 formatted the drive as root and start as root and yet as root I cant access? I am running on ubuntu 12.04. No other mongo is running
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Regular Expression to get a string between parentheses in Javascript
...eses, grab Group 1 value.
Most up-to-date JavaScript code demo (using matchAll):
const strs = ["I expect five hundred dollars ($500).", "I expect.. :( five hundred dollars ($500)."];
const rx = /\(([^()]*)\)/g;
strs.forEach(x => {
const matches = [...x.matchAll(rx)];
console.log( Array.fr...
Merge two (or more) lists into one, in C# .NET
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You can use the LINQ Concat and ToList methods:
var allProducts = productCollection1.Concat(productCollection2)
.Concat(productCollection3)
.ToList();
Note that there are more efficient ways to do this -...
Get a specific bit from byte
I have a byte, specifically one byte from a byte array which came in via UDP sent from another device. This byte stores the on/off state of 8 relays in the device.
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Rails - How to use a Helper Inside a Controller
... use these methods. Also, including the helper into the controller exposes all the helper's methods as publicly accessible actions which is not good. view_context is the way to go in Rails 3.
– GregT
Sep 12 '13 at 3:48
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Memcached vs APC which one should I choose? [closed]
... want to get the best caching engine available so that my application is really fast. Of course I don't want to over-cache but I want to at least choose the best thing out there. In that article it says Memcached is slow and apc is fast so why is everyone choosing memcached ?
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How do you convert a time.struct_time object into a datetime object?
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This will usually work. However, it will fail if the time tuple is beyond the values mktime accepts, for example for the value (1970, 1, 1, 0, 0, 0, 0, 1, -1). I have encountered this after parsing the Date header on an HTTP request which...
Jackson with JSON: Unrecognized field, not marked as ignorable
...eserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
It will ignore all the properties that are not declared.
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Single TextView with multiple colored text
...an issue when I needed my text to be in uppercase. I was using android:textAllCaps="true" in XML and, at the same time, had my HTML content in uppercase. It wasn't working. I removed the XML attribute and it's now working fine. Be carefull, because if you use setAllCaps() in code, the same issue wil...
htaccess Access-Control-Allow-Origin
I'm creating a script that loads externally on other sites. It loads CSS and HTML and works fine on my own servers.
9 Answe...