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Is there a way to detect if an image is blurry?
...ed image and takes the average of the 90% highest frequencies:
testFft[img_] := Table[
(
blurred = GaussianFilter[img, r];
fft = Fourier[ImageData[blurred]];
{w, h} = Dimensions[fft];
windowSize = Round[w/2.1];
Mean[Flatten[(Abs[
fft[[w/2 - windowSize ;; w/2 + windowSize,
...
设备信息使用指导 · App Inventor 2 中文网
...发事件）、Android 系统版本与 SDK 级别、手机型号、ANDROID_ID、
系统语言、定位开关、电量、是否充电、电池温度（电量或充电状态变化时触发事件）。
本应用的版本名、安装来源、是否首次运行，以及返回桌面、打开系统设置...
Restoring Nuget References?
...Sync-References([string]$PackageId) {
get-project -all | %{
$proj = $_ ;
Write-Host $proj.name;
get-package -project $proj.name | ? { $_.id -match $PackageId } | % {
Write-Host $_.id;
uninstall-package -projectname $proj.name -id $_.id -version $_.version -RemoveDependen...
Cloning an Object in Node.js
...ion is now marked as deprecated in the documentation of Node.js:
The util._extend() method was never intended to be used outside of internal Node.js modules. The community found and used it anyway.
It is deprecated and should not be used in new code. JavaScript comes with very similar built-in func...
Weak and strong property setter attributes in Objective-C
...n release autorelease etc... Instead you use strong weak for properties or __strong
__weak
for variables (defaults to __strong). Strong is the equivalent to retain, however ARC will manage the release for you.
The only time you would want to use weak, is if you wanted to avoid retain cycles (e.g...
What can , and be used for?
...xhtml
<f:metadata>
<f:viewParam name="ID" value="#{senderMB._strID}" />
</f:metadata>
We’re going send param ID, it will be included with “includeViewParams=true” in return String of click button event
Click button fire senderMB.clickBtnDetail(dto) with dto from sende...
MySQL check if a table exists without throwing an exception
...PDO syntax for it, but this seems pretty straight-forward:
$result = mysql_query("SHOW TABLES LIKE 'myTable'");
$tableExists = mysql_num_rows($result) > 0;
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...
How to convert ActiveRecord results into an array of hashes
...
as_json
You should use as_json method which converts ActiveRecord objects to Ruby Hashes despite its name
tasks_records = TaskStoreStatus.all
tasks_records = tasks_records.as_json
# You can now add new records and return the...
Why is my git repository so big?
... warnings;
use strict;
use IPC::Open2;
use v5.14;
# Try to get the "format_bytes" function:
my $canFormat = eval {
require Number::Bytes::Human;
Number::Bytes::Human->import('format_bytes');
1;
};
my $format_bytes;
if ($canFormat) {
$format_bytes = \&format_bytes;
}
else {
...
How to add title to subplots in Matplotlib?
...
ax.title.set_text('My Plot Title') seems to work too.
fig = plt.figure()
ax1 = fig.add_subplot(221)
ax2 = fig.add_subplot(222)
ax3 = fig.add_subplot(223)
ax4 = fig.add_subplot(224)
ax1.title.set_text('First Plot')
ax2.title.set_text('Se...