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com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
...IP address in JDBC URL instead.
Verify it based on my.cnf of MySQL DB.
Start the DB.
Verify if mysqld is started without the --skip-networking option.
Restart the DB and fix your code accordingly that it closes connections in finally.
Disable firewall and/or configure firewall/proxy to all...
How does the MapReduce sort algorithm work?
...es and hash partitioning, though projects such as PigLatin and Sawzall are starting to address these problems.
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How can I find the length of a number?
...= 1000000;
let maxSize = 10000;
// ------ Weisstein length.
console.log("Starting weissteinLength length.");
let startTime = Date.now();
for (let index = 0; index < iterations; index++) {
weissteinLength(Math.random() * maxSize);
}
console.log("Ended weissteinLength length. Took : " + (Da...
Windows Explorer “Command Prompt Here” [closed]
...
Just type "cmd" to location bar, that's it. It will start a new command prompt in current path.
This solution was confirmed to work in Windows XP, Vista, 7, 8 and 10 (including Creators Update).
Keystrokes to move the focus to the location bar:
AltD in English (pointed out...
Convert hex to binary
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Doesn't provide leading zeros if hex string starts with 00.
– Dragon
Dec 20 '17 at 22:19
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JavaScriptSerializer - JSON serialization of enum as string
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The third line from this example was added to the App_start/webapiconfig.cs file and did a trick for me in an ASP.NET Web API 2.1 project to return strings for enum values in REST (json fomat) calls.
– Greg Z.
Mar 21 '14 at 17:27
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jQuery Popup Bubble/Tooltip [closed]
...ouseover event as well. I've done it and it doesn't take 200 lines at all. Start with triggering the event, then use a function that will create the tooltip.
$('span.clickme').mouseover(function(event) {
createTooltip(event);
}).mouseout(function(){
// create a hidefunction o...
oh-my-zsh slow, but only for certain Git repo
I recently started using Zsh and it's awesome. Unfortunately, for the project I consider my "main" project, everything is slow. What I mean is that every time I run a command - ls , for example - there's about a five-second delay between the time the command is executed and the time I can use the t...
How do I install a plugin for vim?
...019):
cd ~/.vim
git clone git://github.com/tpope/vim-haml.git pack/bundle/start/haml
Explanation (from :h pack ad :h packages):
All the directories found are added to runtimepath. They must be in ~/.vim/pack/whatever/start [you can only change whatever].
the plugins found in the plugins dir in ...
Couldn't register with the bootstrap Server
...
My solution was to restart the ipad, wait a while and try again.
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