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How do the likely/unlikely macros in the Linux kernel work and what is their benefit?
...dd $0x8,%rsp
34: c3 retq
The instruction order in memory was unchanged: first the printf and then puts and the retq return.
With __builtin_expect
Now replace if (i) with:
if (__builtin_expect(i, 0))
and we get:
0000000000000000 <main>:
0: 48 83 ...
Working with select using AngularJS's ng-options
...t; element. In that case you can perform certain string concatenations, in order to have more complex option labels.
Examples:
ng-options="item.ID as item.Title + ' - ' + item.ID for item in items" gives you labels like Title - ID
ng-options="item.ID as item.Title + ' (' + item.Title.length + ')'...
What is the difference between Amazon SNS and Amazon SQS?
...em manually.
You also have FIFO SQS queues, which guarantee the delivery order of the messages. This is not a supported trigger by Lambda, thus when choosing this type of Queue, keep in mind that polling is still necessary as well as having to delete the messages manually.
Even though there's som...
How to increment datetime by custom months in python without using library [duplicate]
...revents the month from overflowing and in the code it doesn't matter which order year and month are calculated.
– Dave Webb
Nov 9 '10 at 7:02
...
What is the difference between _tmain() and main() in C++?
... followed by the ASCII value.
And since the x86 CPU is little-endian, the order of these bytes are swapped, so that the ASCII value comes first, then followed by a null byte.
And in a char string, how is the string usually terminated? Yep, by a null byte. So your program sees a bunch of strings, e...
Principles for Modeling CouchDB Documents
...ll the comments that reference that parent post ID, sorted in some logical ordering. Maybe you even pass in something like [postID,byUsername] as the key to the 'comments' view to indicate the parent post and how you want the results sorted or something along those lines.
MongoDB handles documents ...
Storing Data in MySQL as JSON
...er rules that MySQL follows when comparing JSON values, see Comparison and Ordering of JSON Values.
MySQL 5.7.8 also introduces a number of functions for working with JSON values. These functions include those listed here:
Functions that create JSON values: JSON_ARRAY(), JSON_MERGE(), a...
Link to the issue number on GitHub within a commit message
...
In order to link the issue number to your commit message, you should add:
#issue_number in your git commit message.
Example Commit Message from Udacity Git Commit Message Style Guide
feat: Summarize changes in around 50 chara...
Detect Retina Display
...
In order to detect the Retina display reliably on all iOS devices, you need to check if the device is running iOS4+ and if the [UIScreen mainScreen].scale property is equal to 2.0. You CANNOT assume a device is running iOS4+ if...
How to bring back “Browser mode” in IE11?
... example:
<meta http-equiv="X-UA-Compatible" content="IE=9" />
In order for the Browser Mode to update on the Developer Tools, you must close [the Developer Tools] and reopen again. This will switch to that specific version.
Switching from a minor version to a greater version will work jus...