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How to use the PI constant in C++
...
On some (especially older) platforms (see the comments below) you might need to
#define _USE_MATH_DEFINES
and then include the necessary header file:
#include <math.h>
and the value of pi can be accessed via:
M_PI
In my math....
How can I know which parts in the code are never used?
...d" when it appears only in if (0) { foo(); } would be a bonus but requires extra smarts.)
– j_random_hacker
Jan 27 '11 at 10:11
...
How to remove a field from params[:something]
My registration form, which is a form for the Users model, takes a string value for company. However, I have just made a change such that users belongs_to companies. Therefore, I need to pass an object of Company to the Users model.
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Why is “Set as Startup” option stored in the suo file and not the sln file?
...nsidered it an advantage to set this on a per user basis. It just leads to extra setup on fresh clones, etc.
– Trevor Reid
May 8 '19 at 13:27
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What's the difference between a file descriptor and file pointer?
...ther Unix-like systems.
You pass "naked" file descriptors to actual Unix calls, such as read(), write() and so on.
A FILE pointer is a C standard library-level construct, used to represent a file. The FILE wraps the file descriptor, and adds buffering and other features to make I/O easier.
You pa...
How does Facebook disable the browser's integrated Developer Tools?
... link; ours is a little more complicated for no good reason.
Chrome wraps all console code in
with ((console && console._commandLineAPI) || {}) {
<code goes here>
}
... so the site redefines console._commandLineAPI to throw:
Object.defineProperty(console, '_commandLineAPI',
{...
How to develop a soft keyboard for Android? [closed]
...yout, mKLayout;
private boolean isEdit = false, isEdit1 = false;
private String mUpper = "upper", mLower = "lower";
private int w, mWindowWidth;
private String sL[] = { "a", "b", "c", "d", "e", "f", "g", "h", "i", "j",
"k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w",
"x", "...
How to add an Access-Control-Allow-Origin header
...ame" https://auth.api.rackspacecloud.com/v1.0
From the results returned, extract the values for X-Auth-Token and X-Storage-Url
curl -X POST \
-H "Content-Type: font/woff" \
--header "X-Auth-Token: returned-x-auth-token" returned-x-storage-url/name-of-your-container/fonts/fontawesome-webfont.w...
windows service vs scheduled task
...t method for the single-thread approach.
protected override void OnStart (string args) {
// Create worker thread; this will invoke the WorkerFunction
// when we start it.
// Since we use a separate worker thread, the main service
// thread will return quickly, telling Windows that serv...
How to manage local vs production settings in Django?
...velopment and production. And every developer has a different code base.I call anti-pattern here.
– pydanny
Jan 31 '13 at 16:25
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