大约有 4,500 项符合查询结果（耗时：0.0196秒） [XML]
PHP: How to send HTTP response code?
....1 404 Not Found"); may fail when the protocol is not HTTP/1.1 (i.e. 'HTTP/1.0'). Current protocol must be detected using $_SERVER['SERVER_PROTOCOL'] (available since PHP 4.1.0
There are at least 2 cases when calling http_response_code() result in unexpected behaviour:
When PHP encounter an HTTP r...
How to decide font color in white or black depending on background color?
...he lightest color and L2 is the luminance of the darkest on a scale of 0.0-1.0. The luminance of black is 0.0 and white is 1.0, so substituting those values lets you determine the one with the highest contrast. If the contrast for black is greater than the contrast for white, use black, otherwise us...
How to add a button to PreferenceScreen
...res/layout/main.xml. It could look something like this:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android...
How do you write a migration to rename an ActiveRecord model and its table in Rails?
...had to go and rename the model declaration file manually.
Edit:
In Rails 3.1 & 4, ActiveRecord::Migration::CommandRecorder knows how to reverse rename_table migrations, so you can do this:
class RenameOldTableToNewTable < ActiveRecord::Migration
def change
rename_table :old_table_nam...
Set Matplotlib colorbar size to match graph
...ction 0.15; fraction of original axes to use for colorbar
shrink 1.0; fraction by which to shrink the colorbar
share
|
improve this answer
|
follow
...
Inline labels in Matplotlib
...]
# add to pop
for p in xy:
pop[l][tuple(p)] = 1.0
# find whitespace, nice place for labels
ws = 1.0 - (np.sum(pop, axis=0) > 0) * 1.0
# don't use the borders
ws[:,0] = 0
ws[:,N-1] = 0
ws[0,:] = 0
ws[N-1,:] = 0
# blur the pop'...
What does “default” mean after a class' function declaration?
... exception specification as the implicit declaration (18.4), then
(3.1) — if the function is explicitly defaulted on its first declaration, it is defined as deleted;
(3.2) — otherwise, the program is ill-formed.
4
[ Example:
struct S {
constexpr S() = default; /...
What is DOCTYPE?
...e you should be using, but most designers try to make it work within XHTML 1.0 Strict.
A doctype is nothing more than a declaration of what tags you can use within your html (though the browsers can use more or less than what is defined) You can actually open up the doctype file and start reading (...
Create objective-c class instance by name?
... = objc_getClass("Object");
[ [ c alloc ] free ];
Under the Objective-C (1.0 or unnamed version) you would utilize the following:
#import <objc/objc-api.h>
//Declaration within the above named file
Class objc_get_class( const char* name);
//Usage
Class cls = objc_get_class( "Test" );
id obj...
Exclude folders from Eclipse search
...osa-webapp'. Resource already exists on disk: '/MyProject/target/MyProject-1.0/WEB-INF/freemarker/site/file.ftl'. Resource already exists on disk: '/MyProject/target/MyProject-1.0/WEB-INF/freemarker/site/file.ftl'."
– Marc
Jan 25 '13 at 13:23
...