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MySQL: Fastest way to count number of rows
...olumn indexes, so it will be the best result. Mysql with MyISAM engine actually stores row count, it doensn't count all rows each time you try to count all rows. (based on primary key's column)
Using PHP to count rows is not very smart, because you have to send data from mysql to php. Why do it whe...
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This, along with all the other conditional comments solutions, will not detect IE 10 / IE 11
– Lloyd Banks
Oct 5 '13 at 2:23
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What's the difference between HEAD, working tree and index, in Git?
... can follow through on or even whether it's a good idea, such as a conceptually demanding refactoring or changing a representation type — I checkpoint my work into the index.
If this is the first change I've made since my last commit, then I can use the local repository as a checkpoint, but often ...
Remove credentials from Git
...everal repositories, but lately I was just working in our internal one and all was great.
35 Answers
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Wrapping chained method calls on a separate line in Eclipse for Java
I haven't been successful in figuring out how to wrap each method call in Eclipse . For example, I have this:
7 Answers
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Date query with ISODate in mongodb doesn't seem to work
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If try exact search with $date like below:
db.foo.find({dt: {"$date": "2012-01-01T15:00:00.000Z"}})
you'll get error:
error: { "$err" : "invalid operator: $date", "code" : 10068 }
Try this:
db.mycollection.find({
"dt" : {"$gte": new Date("2013-10-01T00:00:00.000Z")}
})
or (following c...
Reverting to a specific commit based on commit id with Git? [duplicate]
...ou can add "tags" to your repo.. and then go back to a tag. But a tag is really just a shortcut to the sha1.
You can tag this as TAG1.. then a git reset --soft c14809fa, git reset --soft TAG1, or git reset --soft c14809fafb08b9e96ff2879999ba8c807d10fb07 would all do the same thing.
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JSHint and jQuery: '$' is not defined
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If you are using a relatively recent version of JSHint, the generally preferred approach is to create a .jshintrc file in the root of your project, and put this config in it:
{
"globals": {
"$": false
}
}
This declares to JSHint that $ is a global variable, and the false...
How do I subtract minutes from a date in javascript?
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Once you know this:
You can create a Date by calling the constructor with milliseconds since Jan 1, 1970.
The valueOf() a Date is the number of milliseconds since Jan 1, 1970
There are 60,000 milliseconds in a minute :-]
...it isn't so hard.
In the code below, a new D...
Passing additional variables from command line to make
... arguments? In other words, I want to pass some arguments which will eventually become variables in the Makefile.
8 Answers...