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Why is #!/usr/bin/env bash superior to #!/bin/bash?
I've seen in a number of places, including recommendations on this site ( What is the preferred Bash shebang? ), to use #!/usr/bin/env bash in preference to #!/bin/bash . I've even seen one enterprising individual suggest using #!/bin/bash was wrong and bash functionality would be lost by doing...
How to get a pixel's x,y coordinate color from an image?
...ave solved this) SVG from any domain. This protects against cases where a site serves up a custom image asset for a logged in user and an attacker wants to read the image to get information. You can solve the problem by either serving the image from the same server or implementing Cross-origin res...
How to pass variable from jade template file to a script file?
... be dangerous. You must be sure to sanitize any user inputs to avoid cross-site scripting (XSS).
E.g.:
{ foo: 'bar </script><script> alert("xss") //' }
will become:
<script>var data = {"foo":"bar </script><script> alert("xss") //"}</script>
Possible solution: Us...
Android emulator freezing OS X v10.9 (Mavericks) with HAXM
...hat Android SDK Manager downloaded and the one referenced above on Intel's site).
I can run the older ARM images, but like many others who are having issues running the x86 images, e.g. Nexus 5, Nexus 6, it still hangs for me.
In https://software.intel.com/en-us/forums/topic/536330, there are a ...
What is the 'instanceof' operator used for in Java?
...
As described on this site:
The instanceof operator can be used to test if an object is of a
specific type...
if (objectReference instanceof type)
A quick example:
String s = "Hello World!"
return s instanceof String;
//result -->...
convert_tz returns null
...nning the command in the accepted answer (which is the same on MySQL's dev site) the command was unable to convert between timezones such as
SELECT CONVERT_TZ('2004-01-01 12:00:00','UTC','MET') AS time
It turns out that on OS X there are two files that cause problems: /usr/share/zoneinfo/Factory ...
DynamoDB vs MongoDB NoSQL [closed]
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For quick overview comparisons, I really like this website, that has many comparison pages, eg AWS DynamoDB vs MongoDB; http://db-engines.com/en/system/Amazon+DynamoDB%3BMongoDB
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Why is using 'eval' a bad practice?
... important reason to avoid eval/exec in general. Many applications like websites should take extra care. Take the OP example in a website that expects users to enter the song name. It is bound to be exploited sooner or later. Even an innocent input like: Let's have fun. will cause a syntax error and...
How to replace all occurrences of a string?
...ce since this answer was originally written, so make sure to check the MDN site for potential updates):
function escapeRegExp(string) {
return string.replace(/[.*+\-?^${}()|[\]\\]/g, '\\$&'); // $& means the whole matched string
}
So in order to make the replaceAll() function above safer,...
How to avoid mysql 'Deadlock found when trying to get lock; try restarting transaction'
...to keep track of which pages they are on and their last access date to the site. I then have a cron that runs every 15 minutes to DELETE old records.
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