Best way to use Google's hosted jQuery, but fall back to my hosted library on Google fail
There are some great solutions here, but I'll like to take it one step further regarding the local file.
In a scenario when Google does fail, it should load a local source but maybe a physical file on the server isn't necessarily the best option. I bring this up because I'm currently implementing the same solution, only I want to fall back to a local file that gets generated by a data source.
My reasons for this is that I want to have some piece of mind when it comes to keeping track of what I load from Google vs. what I have on the local server. If I want to change versions, I'll want to keep my local copy synced with what I'm trying to load from Google. In an environment where there are many developers, I think the best approach would be to automate this process so that all one would have to do is change a version number in a configuration file.
Here's my proposed solution that should work in theory:
- In an application configuration file, I'll store 3 things: absolute URL for the library, the URL for the JavaScript API, and the version number
- Write a class which gets the file contents of the library itself (gets the URL from app config), stores it in my datasource with the name and version number
- Write a handler which pulls my local file out of the db and caches the file until the version number changes.
- If it does change (in my app config), my class will pull the file contents based on the version number, save it as a new record in my datasource, then the handler will kick in and serve up the new version.
In theory, if my code is written properly, all I would need to do is change the version number in my app config then viola! You have a fallback solution which is automated, and you don't have to maintain physical files on your server.
What does everyone think? Maybe this is overkill, but it could be an elegant method of maintaining your AJAX libraries.
Acorn
How to recover Git objects damaged by hard disk failure?
Here are the steps I followed to recover from a corrupt blob object.
1) Identify corrupt blob
git fsck --full
error: inflate: data stream error (incorrect data check)
error: sha1 mismatch 241091723c324aed77b2d35f97a05e856b319efd
error: 241091723c324aed77b2d35f97a05e856b319efd: object corrupt or missing
...
Corrupt blob is 241091723c324aed77b2d35f97a05e856b319efd
2) Move corrupt blob to a safe place (just in case)
mv .git/objects/24/1091723c324aed77b2d35f97a05e856b319efd ../24/
3) Get parent of corrupt blob
git fsck --full
Checking object directories: 100% (256/256), done.
Checking objects: 100% (70321/70321), done.
broken link from tree 0716831e1a6c8d3e6b2b541d21c4748cc0ce7180
to blob 241091723c324aed77b2d35f97a05e856b319efd
Parent hash is 0716831e1a6c8d3e6b2b541d21c4748cc0ce7180.
4) Get file name corresponding to corrupt blob
git ls-tree 0716831e1a6c8d3e6b2b541d21c4748cc0ce7180
...
100644 blob 241091723c324aed77b2d35f97a05e856b319efd dump.tar.gz
...
Find this particular file in a backup or in the upstream git repository (in my case it is dump.tar.gz). Then copy it somewhere inside your local repository.
5) Add previously corrupted file in the git object database
git hash-object -w dump.tar.gz
6) Celebrate!
git gc
Counting objects: 75197, done.
Compressing objects: 100% (21805/21805), done.
Writing objects: 100% (75197/75197), done.
Total 75197 (delta 52999), reused 69857 (delta 49296)
Python Pylab scatter plot error bars (the error on each point is unique)
This is almost like the other answer but you don't need a scatter plot at all, you can simply specify a scatter-plot-like format (fmt-parameter) for errorbar:
import matplotlib.pyplot as plt
x = [1, 2, 3, 4]
y = [1, 4, 9, 16]
e = [0.5, 1., 1.5, 2.]
plt.errorbar(x, y, yerr=e, fmt='o')
plt.show()
Result:
A list of the avaiable fmt parameters can be found for example in the plot documentation:
character description
'-' solid line style
'--' dashed line style
'-.' dash-dot line style
':' dotted line style
'.' point marker
',' pixel marker
'o' circle marker
'v' triangle_down marker
'^' triangle_up marker
'<' triangle_left marker
'>' triangle_right marker
'1' tri_down marker
'2' tri_up marker
'3' tri_left marker
'4' tri_right marker
's' square marker
'p' pentagon marker
'*' star marker
'h' hexagon1 marker
'H' hexagon2 marker
'+' plus marker
'x' x marker
'D' diamond marker
'd' thin_diamond marker
'|' vline marker
'_' hline marker
How to get distinct values from an array of objects in JavaScript?
If like me you prefer a more "functional" without compromising speed, this example uses fast dictionary lookup wrapped inside reduce closure.
var array =
[
{"name":"Joe", "age":17},
{"name":"Bob", "age":17},
{"name":"Carl", "age": 35}
]
var uniqueAges = array.reduce((p,c,i,a) => {
if(!p[0][c.age]) {
p[1].push(p[0][c.age] = c.age);
}
if(i<a.length-1) {
return p
} else {
return p[1]
}
}, [{},[]])
According to this test my solution is twice as fast as the proposed answer
How do I get data from a table?
in this code data is a two dimensional array of table data
let oTable = document.getElementById('datatable-id');
let data = [...oTable.rows].map(t => [...t.children].map(u => u.innerText))
How to use patterns in a case statement?
Brace expansion doesn't work, but *, ? and [] do. If you set shopt -s extglob then you can also use extended pattern matching:
?() - zero or one occurrences of pattern*() - zero or more occurrences of pattern+() - one or more occurrences of pattern@() - one occurrence of pattern!() - anything except the pattern
Here's an example:
shopt -s extglob
for arg in apple be cd meet o mississippi
do
# call functions based on arguments
case "$arg" in
a* ) foo;; # matches anything starting with "a"
b? ) bar;; # matches any two-character string starting with "b"
c[de] ) baz;; # matches "cd" or "ce"
me?(e)t ) qux;; # matches "met" or "meet"
@(a|e|i|o|u) ) fuzz;; # matches one vowel
m+(iss)?(ippi) ) fizz;; # matches "miss" or "mississippi" or others
* ) bazinga;; # catchall, matches anything not matched above
esac
done
Android Studio says "cannot resolve symbol" but project compiles
Invalidate Caches / Restart didn't work for me this time.
Found a solution like this:
Remove the compile *** or implementation *** line in build.gradle.
Clean and rebuild. Errors should be raised here.
Add the line in step 1 back to build.gradle.
Clean and rebuild.
Weird...
Android 5.0 - Add header/footer to a RecyclerView
recyclerview:1.2.0 introduces ConcatAdapter class which concatenates multiple adapters into a single one. So it allows to create separate header/footer adapters and reuse them across multiple lists.
myRecyclerView.adapter = ConcatAdapter(headerAdapter, listAdapter, footerAdapter)
Take a look at the announcement article. It contains a sample how to display a loading progress in header and footer using ConcatAdapter.
For the moment when I post this answer the version 1.2.0 of the library is in alpha stage, so the api might change. You can check the status here.
How to center icon and text in a android button with width set to "fill parent"
Had similar issue but wanted to have center drawable with no text and no wrapped layouts. Solution was to create custom button and add one more drawable in addition to LEFT, RIGHT, TOP, BOTTOM. One can easily modify drawable placement and have it in desired position relative to text.
CenterDrawableButton.java
public class CenterDrawableButton extends Button {
private Drawable mDrawableCenter;
public CenterDrawableButton(Context context) {
super(context);
init(context, null);
}
public CenterDrawableButton(Context context, AttributeSet attrs) {
super(context, attrs);
init(context, attrs);
}
public CenterDrawableButton(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init(context, attrs);
}
@TargetApi(Build.VERSION_CODES.LOLLIPOP)
public CenterDrawableButton(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
super(context, attrs, defStyleAttr, defStyleRes);
init(context, attrs);
}
private void init(Context context, AttributeSet attrs){
//if (isInEditMode()) return;
if(attrs!=null){
TypedArray a = context.getTheme().obtainStyledAttributes(
attrs, R.styleable.CenterDrawableButton, 0, 0);
try {
setCenterDrawable(a.getDrawable(R.styleable.CenterDrawableButton_drawableCenter));
} finally {
a.recycle();
}
}
}
public void setCenterDrawable(int center) {
if(center==0){
setCenterDrawable(null);
}else
setCenterDrawable(getContext().getResources().getDrawable(center));
}
public void setCenterDrawable(@Nullable Drawable center) {
int[] state;
state = getDrawableState();
if (center != null) {
center.setState(state);
center.setBounds(0, 0, center.getIntrinsicWidth(), center.getIntrinsicHeight());
center.setCallback(this);
}
mDrawableCenter = center;
invalidate();
requestLayout();
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
if(mDrawableCenter!=null) {
setMeasuredDimension(Math.max(getMeasuredWidth(), mDrawableCenter.getIntrinsicWidth()),
Math.max(getMeasuredHeight(), mDrawableCenter.getIntrinsicHeight()));
}
}
@Override
protected void drawableStateChanged() {
super.drawableStateChanged();
if (mDrawableCenter != null) {
int[] state = getDrawableState();
mDrawableCenter.setState(state);
mDrawableCenter.setBounds(0, 0, mDrawableCenter.getIntrinsicWidth(),
mDrawableCenter.getIntrinsicHeight());
}
invalidate();
}
@Override
protected void onDraw(@NonNull Canvas canvas) {
super.onDraw(canvas);
if (mDrawableCenter != null) {
Rect rect = mDrawableCenter.getBounds();
canvas.save();
canvas.translate(getWidth() / 2 - rect.right / 2, getHeight() / 2 - rect.bottom / 2);
mDrawableCenter.draw(canvas);
canvas.restore();
}
}
}
attrs.xml
<resources>
<attr name="drawableCenter" format="reference"/>
<declare-styleable name="CenterDrawableButton">
<attr name="drawableCenter"/>
</declare-styleable>
</resources>
usage
<com.virtoos.android.view.custom.CenterDrawableButton
android:id="@id/centerDrawableButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:drawableCenter="@android:drawable/ic_menu_info_details"/>
How to create empty constructor for data class in Kotlin Android
Non-empty secondary constructor for data class in Kotlin:
data class ChemicalElement(var name: String,
var symbol: String,
var atomicNumber: Int,
var atomicWeight: Double,
var nobleMetal: Boolean?) {
constructor(): this("Silver",
"Ag",
47,
107.8682,
true)
}
fun main() {
var chemicalElement = ChemicalElement()
println("RESULT: ${chemicalElement.symbol} means ${chemicalElement.name}")
println(chemicalElement)
}
// RESULT: Ag means Silver
// ChemicalElement(name=Silver, symbol=Ag, atomicNumber=47, atomicWeight=107.8682, nobleMetal=true)
Empty secondary constructor for data class in Kotlin:
data class ChemicalElement(var name: String,
var symbol: String,
var atomicNumber: Int,
var atomicWeight: Double,
var nobleMetal: Boolean?) {
constructor(): this("",
"",
-1,
0.0,
null)
}
fun main() {
var chemicalElement = ChemicalElement()
println(chemicalElement)
}
// ChemicalElement(name=, symbol=, atomicNumber=-1, atomicWeight=0.0, nobleMetal=null)
What is /dev/null 2>&1?
>> /dev/null redirects standard output (stdout) to /dev/null, which discards it.
(The >> seems sort of superfluous, since >> means append while > means truncate and write, and either appending to or writing to /dev/null has the same net effect. I usually just use > for that reason.)
2>&1 redirects standard error (2) to standard output (1), which then discards it as well since standard output has already been redirected.
Spring JDBC Template for calling Stored Procedures
There are a number of ways to call stored procedures in Spring.
If you use CallableStatementCreator to declare parameters, you will be using Java's standard interface of CallableStatement, i.e register out parameters and set them separately. Using SqlParameter abstraction will make your code cleaner.
I recommend you looking at SimpleJdbcCall. It may be used like this:
SimpleJdbcCall jdbcCall = new SimpleJdbcCall(jdbcTemplate)
.withSchemaName(schema)
.withCatalogName(package)
.withProcedureName(procedure)();
...
jdbcCall.addDeclaredParameter(new SqlParameter(paramName, OracleTypes.NUMBER));
...
jdbcCall.execute(callParams);
For simple procedures you may use jdbcTemplate's update method:
jdbcTemplate.update("call SOME_PROC (?, ?)", param1, param2);
Cannot import scipy.misc.imread
If you have Pillow installed with scipy and it is still giving you error then check your scipy version because it has been removed from scipy since 1.3.0rc1.
rather install scipy 1.1.0 by :
pip install scipy==1.1.0
check https://github.com/scipy/scipy/issues/6212
The method imread in scipy.misc requires the forked package of PIL named Pillow. If you are having problem installing the right version of PIL try using imread in other packages:
from matplotlib.pyplot import imread
im = imread(image.png)
To read jpg images without PIL use:
import cv2 as cv
im = cv.imread(image.jpg)
You can try
from scipy.misc.pilutil import imread instead of from scipy.misc import imread
Please check the GitHub page : https://github.com/amueller/mglearn/issues/2
for more details.
How to set value to variable using 'execute' in t-sql?
You can try like below
DECLARE @sqlCommand NVARCHAR(4000)
DECLARE @ID INT
DECLARE @Name NVARCHAR(100)
SET @ID = 4
SET @sqlCommand = 'SELECT @Name = [Name]
FROM [AdventureWorks2014].[HumanResources].[Department]
WHERE DepartmentID = @ID'
EXEC sp_executesql @sqlCommand, N'@ID INT, @Name NVARCHAR(100) OUTPUT',
@ID = @ID, @Name = @Name OUTPUT
SELECT @Name ReturnedName
Source : blog.sqlauthority.com
.attr('checked','checked') does not work
$("input:radio").attr("checked",true); //for all radio inputs
or
$("your id or class here").attr("checked",true); //for unique radios
equally the same works for ("checked","checked")
Replace string within file contents
If you'd like to replace the strings in the same file, you probably have to read its contents into a local variable, close it, and re-open it for writing:
I am using the with statement in this example, which closes the file after the with block is terminated - either normally when the last command finishes executing, or by an exception.
def inplace_change(filename, old_string, new_string):
# Safely read the input filename using 'with'
with open(filename) as f:
s = f.read()
if old_string not in s:
print('"{old_string}" not found in {filename}.'.format(**locals()))
return
# Safely write the changed content, if found in the file
with open(filename, 'w') as f:
print('Changing "{old_string}" to "{new_string}" in {filename}'.format(**locals()))
s = s.replace(old_string, new_string)
f.write(s)
It is worth mentioning that if the filenames were different, we could have done this more elegantly with a single with statement.
Extract a subset of a dataframe based on a condition involving a field
Just to extend the answer above you can also index your columns rather than specifying the column names which can also be useful depending on what you're doing. Given that your location is the first field it would look like this:
bar <- foo[foo[ ,1] == "there", ]
This is useful because you can perform operations on your column value, like looping over specific columns (and you can do the same by indexing row numbers too).
This is also useful if you need to perform some operation on more than one column because you can then specify a range of columns:
foo[foo[ ,c(1:N)], ]
Or specific columns, as you would expect.
foo[foo[ ,c(1,5,9)], ]
Singleton in Android
answer suggested by rakesh is great but still with some discription
Singleton in Android is the same as Singleton in Java:
The Singleton design pattern addresses all of these concerns. With the Singleton design pattern you can:
1) Ensure that only one instance of a class is created
2) Provide a global point of access to the object
3) Allow multiple instances in the future without affecting a
singleton class's clients
A basic Singleton class example:
public class MySingleton
{
private static MySingleton _instance;
private MySingleton()
{
}
public static MySingleton getInstance()
{
if (_instance == null)
{
_instance = new MySingleton();
}
return _instance;
}
}
Update statement using with clause
The WITH syntax appears to be valid in an inline view, e.g.
UPDATE (WITH comp AS ...
SELECT SomeColumn, ComputedValue FROM t INNER JOIN comp ...)
SET SomeColumn=ComputedValue;
But in the quick tests I did this always failed with ORA-01732: data manipulation operation not legal on this view, although it succeeded if I rewrote to eliminate the WITH clause. So the refactoring may interfere with Oracle's ability to guarantee key-preservation.
You should be able to use a MERGE, though. Using the simple example you've posted this doesn't even require a WITH clause:
MERGE INTO mytable t
USING (select *, 42 as ComputedValue from mytable where id = 1) comp
ON (t.id = comp.id)
WHEN MATCHED THEN UPDATE SET SomeColumn=ComputedValue;
But I understand you have a more complex subquery you want to factor out. I think that you will be able to make the subquery in the USING clause arbitrarily complex, incorporating multiple WITH clauses.
Internet Explorer 11- issue with security certificate error prompt
If you updated Internet Explorer and began having technical problems, you can use the Compatibility View feature to emulate a previous version of Internet Explorer.
For instructions, see the section below that corresponds with your version. To find your version number, click Help > About Internet Explorer.
Internet Explorer 11
To edit the Compatibility View list:
Open the desktop, and then tap or click the Internet Explorer icon on the taskbar.
Tap or click the Tools button (Image), and then tap or click Compatibility View settings.
To remove a website:
Click the website(s) where you would like to turn off Compatibility View, clicking Remove after each one.
To add a website:
Under Add this website, enter the website(s) where you would like to turn on Compatibility View, clicking Add after each one.
Read data from SqlDataReader
I usually read data by data reader this way. just added a small example.
string connectionString = "Data Source=DESKTOP-2EV7CF4;Initial Catalog=TestDB;User ID=sa;Password=tintin11#";
string queryString = "Select * from EMP";
using (SqlConnection connection = new SqlConnection(connectionString))
using (SqlCommand command = new SqlCommand(queryString, connection))
{
connection.Open();
using (SqlDataReader reader = command.ExecuteReader())
{
if (reader.HasRows)
{
while (reader.Read())
{
Console.WriteLine(String.Format("{0}, {1}", reader[0], reader[1]));
}
}
reader.Close();
}
}
What is the simplest way to SSH using Python?
please refer to paramiko.org, its very useful while doing ssh using python.
import paramiko
import time
ssh = paramiko.SSHClient() #SSHClient() is the paramiko object</n>
#Below lines adds the server key automatically to know_hosts file.use anyone one of the below
ssh.load_system_host_keys()
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
try:
#Here we are actually connecting to the server.
ssh.connect('10.106.104.24', port=22, username='admin', password='')
time.sleep(5)
#I have mentioned time because some servers or endpoint prints there own information after
#loggin in e.g. the version, model and uptime information, so its better to give some time
#before executing the command.
#Here we execute the command, stdin for input, stdout for output, stderr for error
stdin, stdout, stderr = ssh.exec_command('xstatus Time')
#Here we are reading the lines from output.
output = stdout.readlines()
print(output)
#Below all are the Exception handled by paramiko while ssh. Refer to paramiko.org for more information about exception.
except (BadHostKeyException, AuthenticationException,
SSHException, socket.error) as e:
print(e)
Changing the color of a clicked table row using jQuery
To change color of a cell:
$(document).on('click', '#table tbody td', function (event) {
var selected = $(this).hasClass("obstacle");
$("#table tbody td").removeClass("obstacle");
if (!selected)
$(this).addClass("obstacle");
});
Apply .gitignore on an existing repository already tracking large number of files
Create a .gitignore file, so to do that, you just create any blank .txt file.
Then you have to change its name writing the following line on the cmd (where git.txt is the name of the file you've just created):
rename git.txt .gitignore
Then you can open the file and write all the untracked files you want to ignore for good. For example, mine looks like this:
```
OS junk files
[Tt]humbs.db
*.DS_Store
#Visual Studio files
*.[Oo]bj
*.user
*.aps
*.pch
*.vspscc
*.vssscc
*_i.c
*_p.c
*.ncb
*.suo
*.tlb
*.tlh
*.bak
*.[Cc]ache
*.ilk
*.log
*.lib
*.sbr
*.sdf
*.pyc
*.xml
ipch/
obj/
[Bb]in
[Dd]ebug*/
[Rr]elease*/
Ankh.NoLoad
#Tooling
_ReSharper*/
*.resharper
[Tt]est[Rr]esult*
#Project files
[Bb]uild/
#Subversion files
.svn
# Office Temp Files
~$*
There's a whole collection of useful .gitignore files by GitHub
Once you have this, you need to add it to your git repository just like any other file, only it has to be in the root of the repository.
Then in your terminal you have to write the following line:
git config --global core.excludesfile ~/.gitignore_global
From oficial doc:
You can also create a global .gitignore file, which is a list of rules
for ignoring files in every Git repository on your computer. For
example, you might create the file at ~/.gitignore_global and add some
rules to it.
Open Terminal. Run the following command in your terminal: git config
--global core.excludesfile ~/.gitignore_global
If the respository already exists then you have to run these commands:
git rm -r --cached .
git add .
git commit -m ".gitignore is now working"
If the step 2 doesn´t work then you should write the hole route of the files that you would like to add.
TSQL: How to convert local time to UTC? (SQL Server 2008)
While a few of these answers will get you in the ballpark, you cannot do what you're trying to do with arbitrary dates for SqlServer 2005 and earlier because of daylight savings time. Using the difference between the current local and current UTC will give me the offset as it exists today. I have not found a way to determine what the offset would have been for the date in question.
That said, I know that SqlServer 2008 provides some new date functions that may address that issue, but folks using an earlier version need to be aware of the limitations.
Our approach is to persist UTC and perform the conversion on the client side where we have more control over the conversion's accuracy.
How to configure Fiddler to listen to localhost?
I am running Fiddler v4.4.7.1. I needed to use localhost:8888 or machinename:8888 when using the Composer tab. Look at the Help/About Fiddler menu option, where it says, "Running on:". Mine shows machinename:8888 there.
What is thread safe or non-thread safe in PHP?
For me, I always choose non-thread safe version because I always use nginx, or run PHP from the command line.
The non-thread safe version should be used if you install PHP as a CGI binary, command line interface or other environment where only a single thread is used.
A thread-safe version should be used if you install PHP as an Apache module in a worker MPM (multi-processing model) or other environment where multiple PHP threads run concurrently.
Bootstrap - dropdown menu not working?
put following code in your page
Sys.WebForms.PageRequestManager.getInstance().add_endRequest(EndRequest);
function EndRequest(sender, args) {
if (args.get_error() == undefined) {
$('.dropdown-toggle').dropdown();
}
}
Swift: declare an empty dictionary
You can use the following code:
var d1 = Dictionary<Int, Int>()
var d2 = [Int: Int]()
var d3: Dictionary<Int, Int> = [Int : Int]()
var d4: [Int : Int] = [:]
Using Linq select list inside list
After my previous answer disaster, I'm going to try something else.
List<Model> usrList =
(list.Where(n => n.application == "applicationame").ToList());
usrList.ForEach(n => n.users.RemoveAll(n => n.surname != "surname"));
Git command to checkout any branch and overwrite local changes
Couple of points:
- I believe
git stash + git stash drop could be replaced with git reset --hard
... or, even shorter, add -f to checkout command:
git checkout -f -b $branch
That will discard any local changes, just as if git reset --hard was used prior to checkout.
As for the main question:
instead of pulling in the last step, you could just merge the appropriate branch from the remote into your local branch: git merge $branch origin/$branch, I believe it does not hit the remote. If that is the case, it removes the need for credensials and hence, addresses your biggest concern.
fail to change placeholder color with Bootstrap 3
The others did not work in my case (Bootstrap 4). Here is the solution I used.
html .form-control::-webkit-input-placeholder { color:white; }
html .form-control:-moz-placeholder { color:white; }
html .form-control::-moz-placeholder { color:white; }
html .form-control:-ms-input-placeholder { color:white; }
If we use a stronger selector (html first), we don't need to use the hacky value !important.
This overrides bootstraps CSS as we use a higher level of specificity to target .form-control elements (html first instead of .form-control first).
How to fix a collation conflict in a SQL Server query?
I resolved a similar issue by wrapping the query in another query...
Initial query was working find giving individual columns of output, with some of the columns coming from sub queries with Max or Sum function, and other with "distinct" or case substitutions and such.
I encountered the collation error after attempting to create a single field of output with...
select
rtrim(field1)+','+rtrim(field2)+','+...
The query would execute as I wrote it, but the error would occur after saving the sql and reloading it.
Wound up fixing it with something like...
select z.field1+','+z.field2+','+... as OUTPUT_REC
from (select rtrim(field1), rtrim(field2), ... ) z
Some fields are "max" of a subquery, with a case substitution if null and others are date fields, and some are left joins (might be NULL)...in other words, mixed field types. I believe this is the cause of the issue being caused by OS collation and Database collation being slightly different, but by converting all to trimmed strings before the final select, it sorts it out, all in the SQL.
Warning: Use the 'defaultValue' or 'value' props on <select> instead of setting 'selected' on <option>
Thank you all for this thread! My colleague and I just discovered that the default_value property is a Constant, not a Variable.
In other React forms I've built, the default value for a Select was preset in an associated Context. So the first time the Select was rendered, default_value was set to the correct value.
But in my latest React form (a small modal), I'm passing the values for the form as props and then using a useEffect to populate the associated Context. So the FIRST time the Select is rendered, default_value is set to null. Then when the Context is populated and the Select is supposed to be re-rendered, default_value cannot be changed and thus the initial default value is not set.
The solution was ultimately simple: Use the value property instead. But figuring out why default_value didn't work like it did with my other forms took some time.
I'm posting this to help others in the community.
Uint8Array to string in Javascript
If you can't use the TextDecoder API because it is not supported on IE:
- You can use the FastestSmallestTextEncoderDecoder polyfill recommended by the Mozilla Developer Network website;
- You can use this function also provided at the MDN website:
_x000D_
_x000D_
function utf8ArrayToString(aBytes) {_x000D_
var sView = "";_x000D_
_x000D_
for (var nPart, nLen = aBytes.length, nIdx = 0; nIdx < nLen; nIdx++) {_x000D_
nPart = aBytes[nIdx];_x000D_
_x000D_
sView += String.fromCharCode(_x000D_
nPart > 251 && nPart < 254 && nIdx + 5 < nLen ? /* six bytes */_x000D_
/* (nPart - 252 << 30) may be not so safe in ECMAScript! So...: */_x000D_
(nPart - 252) * 1073741824 + (aBytes[++nIdx] - 128 << 24) + (aBytes[++nIdx] - 128 << 18) + (aBytes[++nIdx] - 128 << 12) + (aBytes[++nIdx] - 128 << 6) + aBytes[++nIdx] - 128_x000D_
: nPart > 247 && nPart < 252 && nIdx + 4 < nLen ? /* five bytes */_x000D_
(nPart - 248 << 24) + (aBytes[++nIdx] - 128 << 18) + (aBytes[++nIdx] - 128 << 12) + (aBytes[++nIdx] - 128 << 6) + aBytes[++nIdx] - 128_x000D_
: nPart > 239 && nPart < 248 && nIdx + 3 < nLen ? /* four bytes */_x000D_
(nPart - 240 << 18) + (aBytes[++nIdx] - 128 << 12) + (aBytes[++nIdx] - 128 << 6) + aBytes[++nIdx] - 128_x000D_
: nPart > 223 && nPart < 240 && nIdx + 2 < nLen ? /* three bytes */_x000D_
(nPart - 224 << 12) + (aBytes[++nIdx] - 128 << 6) + aBytes[++nIdx] - 128_x000D_
: nPart > 191 && nPart < 224 && nIdx + 1 < nLen ? /* two bytes */_x000D_
(nPart - 192 << 6) + aBytes[++nIdx] - 128_x000D_
: /* nPart < 127 ? */ /* one byte */_x000D_
nPart_x000D_
);_x000D_
}_x000D_
_x000D_
return sView;_x000D_
}_x000D_
_x000D_
let str = utf8ArrayToString([50,72,226,130,130,32,43,32,79,226,130,130,32,226,135,140,32,50,72,226,130,130,79]);_x000D_
_x000D_
// Must show 2H2 + O2 ? 2H2O_x000D_
console.log(str);
_x000D_
_x000D_
_x000D_
Draw text in OpenGL ES
In the OpenGL ES 2.0/3.0 you can also combining OGL View and Android's UI-elements:
public class GameActivity extends AppCompatActivity {
private SurfaceView surfaceView;
@Override
protected void onCreate(Bundle state) {
setContentView(R.layout.activity_gl);
surfaceView = findViewById(R.id.oglView);
surfaceView.init(this.getApplicationContext());
...
}
}
public class SurfaceView extends GLSurfaceView {
private SceneRenderer renderer;
public SurfaceView(Context context) {
super(context);
}
public SurfaceView(Context context, AttributeSet attributes) {
super(context, attributes);
}
public void init(Context context) {
renderer = new SceneRenderer(context);
setRenderer(renderer);
...
}
}
Create layout activity_gl.xml:
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
tools:context=".activities.GameActivity">
<com.app.SurfaceView
android:id="@+id/oglView"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
<TextView ... />
<TextView ... />
<TextView ... />
</androidx.constraintlayout.widget.ConstraintLayout>
To update elements from the render thread, can use Handler/Looper.
What is pipe() function in Angular
RxJS Operators are functions that build on the observables foundation to enable sophisticated manipulation of collections.
For example, RxJS defines operators such as map(), filter(), concat(), and flatMap().
You can use pipes to link operators together. Pipes let you combine multiple functions into a single function.
The pipe() function takes as its arguments the functions you want to combine, and returns a new function that, when executed, runs the composed functions in sequence.
Inverse dictionary lookup in Python
This version is 26% shorter than yours but functions identically, even for redundant/ambiguous values (returns the first match, as yours does). However, it is probably twice as slow as yours, because it creates a list from the dict twice.
key = dict_obj.keys()[dict_obj.values().index(value)]
Or if you prefer brevity over readability you can save one more character with
key = list(dict_obj)[dict_obj.values().index(value)]
And if you prefer efficiency, @PaulMcGuire's approach is better. If there are lots of keys that share the same value it's more efficient not to instantiate that list of keys with a list comprehension and instead use use a generator:
key = (key for key, value in dict_obj.items() if value == 'value').next()
Stored procedure with default parameters
I wrote with parameters that are predefined
They are not "predefined" logically, somewhere inside your code. But as arguments of SP they have no default values and are required. To avoid passing those params explicitly you have to define default values in SP definition:
Alter Procedure [Test]
@StartDate AS varchar(6) = NULL,
@EndDate AS varchar(6) = NULL
AS
...
NULLs or empty strings or something more sensible - up to you. It does not matter since you are overwriting values of those arguments in the first lines of SP.
Now you can call it without passing any arguments e.g.
exec dbo.TEST
C# '@' before a String
What is this for and why would I use @":\" instead of ":\"?
Because when you have a long string with many \ you don't need to escape them all and the \n, \r and \f won't work too.
How to redirect a page using onclick event in php?
You can't use php code client-side. You need to use javascript.
<input type="button" value="Home" class="homebutton" id="btnHome"
onClick="document.location.href='some/page'" />
However, you really shouldn't be using inline js (like onclick here). Study about this here: https://www.google.com/search?q=Why+is+inline+js+bad%3F
Here's a clean way of doing this: Live demo (click).
Markup:
<button id="myBtn">Redirect</button>
JavaScript:
var btn = document.getElementById('myBtn');
btn.addEventListener('click', function() {
document.location.href = 'some/page';
});
If you need to write in the location with php:
<button id="myBtn">Redirect</button>
<script>
var btn = document.getElementById('myBtn');
btn.addEventListener('click', function() {
document.location.href = '<?php echo $page; ?>';
});
</script>
Set specific precision of a BigDecimal
Try this code ...
Integer perc = 5;
BigDecimal spread = BigDecimal.ZERO;
BigDecimal perc = spread.setScale(perc,BigDecimal.ROUND_HALF_UP);
System.out.println(perc);
Result: 0.00000
How to remove youtube branding after embedding video in web page?
Yes It it True
1)By modestbranding=1 to your url. That will remove the logo that is appered in bottom lest as branding and
2)By &showinfo=0 will remove the title bar.
But I think You Can not Remove Both Think together
Just try Both thnik hear
http://codegena.com/generator/Youtube-Embed-Code-Generator
1) when try hide logo
<iframe width='500' height='294' src="https://www.youtube.com/embed/YykjpeuMNEk?&theme=dark&autohide=2&modestbranding=1"frameborder="0"></iframe>
2)Now try to hide topbar
<iframe width='500' height='294' src="https://www.youtube.com/embed/YykjpeuMNEk?&theme=dark&autohide=2&showinfo=0"frameborder="0"></iframe>
==>But Now When We try to hide Both Information See the Limitation
<iframe width='500' height='294' src="https://www.youtube.com/embed/YykjpeuMNEk?&theme=dark&autohide=2&modestbranding=1&showinfo=0"frameborder="0"></iframe>
Joining pandas dataframes by column names
you can use the left_on and right_on options as follows:
pd.merge(frame_1, frame_2, left_on='county_ID', right_on='countyid')
I was not sure from the question if you only wanted to merge if the key was in the left hand dataframe. If that is the case then the following will do that (the above will in effect do a many to many merge)
pd.merge(frame_1, frame_2, how='left', left_on='county_ID', right_on='countyid')
Testing two JSON objects for equality ignoring child order in Java
Try this:
public static boolean jsonsEqual(Object obj1, Object obj2) throws JSONException
{
if (!obj1.getClass().equals(obj2.getClass()))
{
return false;
}
if (obj1 instanceof JSONObject)
{
JSONObject jsonObj1 = (JSONObject) obj1;
JSONObject jsonObj2 = (JSONObject) obj2;
String[] names = JSONObject.getNames(jsonObj1);
String[] names2 = JSONObject.getNames(jsonObj1);
if (names.length != names2.length)
{
return false;
}
for (String fieldName:names)
{
Object obj1FieldValue = jsonObj1.get(fieldName);
Object obj2FieldValue = jsonObj2.get(fieldName);
if (!jsonsEqual(obj1FieldValue, obj2FieldValue))
{
return false;
}
}
}
else if (obj1 instanceof JSONArray)
{
JSONArray obj1Array = (JSONArray) obj1;
JSONArray obj2Array = (JSONArray) obj2;
if (obj1Array.length() != obj2Array.length())
{
return false;
}
for (int i = 0; i < obj1Array.length(); i++)
{
boolean matchFound = false;
for (int j = 0; j < obj2Array.length(); j++)
{
if (jsonsEqual(obj1Array.get(i), obj2Array.get(j)))
{
matchFound = true;
break;
}
}
if (!matchFound)
{
return false;
}
}
}
else
{
if (!obj1.equals(obj2))
{
return false;
}
}
return true;
}
How do I convert hex to decimal in Python?
You could use a literal eval:
>>> ast.literal_eval('0xdeadbeef')
3735928559
Or just specify the base as argument to int:
>>> int('deadbeef', 16)
3735928559
A trick that is not well known, if you specify the base 0 to int, then Python will attempt to determine the base from the string prefix:
>>> int("0xff", 0)
255
>>> int("0o644", 0)
420
>>> int("0b100", 0)
4
>>> int("100", 0)
100
Simplest way to wait some asynchronous tasks complete, in Javascript?
The way to do it is to pass the tasks a callback that updates a shared counter. When the shared counter reaches zero you know that all tasks have finished so you can continue with your normal flow.
var ntasks_left_to_go = 4;
var callback = function(){
ntasks_left_to_go -= 1;
if(ntasks_left_to_go <= 0){
console.log('All tasks have completed. Do your stuff');
}
}
task1(callback);
task2(callback);
task3(callback);
task4(callback);
Of course, there are many ways to make this kind of code more generic or reusable and any of the many async programing libraries out there should have at least one function to do this kind of thing.
Jquery show/hide table rows
The filter function wasn't working for me at all; maybe the more recent version of jquery doesn't perform as the version used in above code. Regardless; I used:
var black = $('.black');
var white = $('.white');
The selector will find every element classed under black or white.
Button functions stay as stated above:
$('#showBlackButton').click(function() {
black.show();
white.hide();
});
$('#showWhiteButton').click(function() {
white.show();
black.hide();
});
JNI and Gradle in Android Studio
Gradle Build Tools 2.2.0+ - The closest the NDK has ever come to being called 'magic'
In trying to avoid experimental and frankly fed up with the NDK and all its hackery I am happy that 2.2.x of the Gradle Build Tools came out and now it just works. The key is the externalNativeBuild and pointing ndkBuild path argument at an Android.mk or change ndkBuild to cmake and point the path argument at a CMakeLists.txt build script.
android {
compileSdkVersion 19
buildToolsVersion "25.0.2"
defaultConfig {
minSdkVersion 19
targetSdkVersion 19
ndk {
abiFilters 'armeabi', 'armeabi-v7a', 'x86'
}
externalNativeBuild {
cmake {
cppFlags '-std=c++11'
arguments '-DANDROID_TOOLCHAIN=clang',
'-DANDROID_PLATFORM=android-19',
'-DANDROID_STL=gnustl_static',
'-DANDROID_ARM_NEON=TRUE',
'-DANDROID_CPP_FEATURES=exceptions rtti'
}
}
}
externalNativeBuild {
cmake {
path 'src/main/jni/CMakeLists.txt'
}
//ndkBuild {
// path 'src/main/jni/Android.mk'
//}
}
}
For much more detail check Google's page on adding native code.
After this is setup correctly you can ./gradlew installDebug and off you go. You will also need to be aware that the NDK is moving to clang since gcc is now deprecated in the Android NDK.
Android Studio Clean and Build Integration - DEPRECATED
The other answers do point out the correct way to prevent the automatic creation of Android.mk files, but they fail to go the extra step of integrating better with Android Studio. I have added the ability to actually clean and build from source without needing to go to the command-line. Your local.properties file will need to have ndk.dir=/path/to/ndk
apply plugin: 'com.android.application'
android {
compileSdkVersion 14
buildToolsVersion "20.0.0"
defaultConfig {
applicationId "com.example.application"
minSdkVersion 14
targetSdkVersion 14
ndk {
moduleName "YourModuleName"
}
}
sourceSets.main {
jni.srcDirs = [] // This prevents the auto generation of Android.mk
jniLibs.srcDir 'src/main/libs' // This is not necessary unless you have precompiled libraries in your project.
}
task buildNative(type: Exec, description: 'Compile JNI source via NDK') {
def ndkDir = android.ndkDirectory
commandLine "$ndkDir/ndk-build",
'-C', file('src/main/jni').absolutePath, // Change src/main/jni the relative path to your jni source
'-j', Runtime.runtime.availableProcessors(),
'all',
'NDK_DEBUG=1'
}
task cleanNative(type: Exec, description: 'Clean JNI object files') {
def ndkDir = android.ndkDirectory
commandLine "$ndkDir/ndk-build",
'-C', file('src/main/jni').absolutePath, // Change src/main/jni the relative path to your jni source
'clean'
}
clean.dependsOn 'cleanNative'
tasks.withType(JavaCompile) {
compileTask -> compileTask.dependsOn buildNative
}
}
dependencies {
compile 'com.android.support:support-v4:20.0.0'
}
The src/main/jni directory assumes a standard layout of the project. It should be the relative from this build.gradle file location to the jni directory.
Gradle - for those having issues
Also check this Stack Overflow answer.
It is really important that your gradle version and general setup are correct. If you have an older project I highly recommend creating a new one with the latest Android Studio and see what Google considers the standard project. Also, use gradlew. This protects the developer from a gradle version mismatch. Finally, the gradle plugin must be configured correctly.
And you ask what is the latest version of the gradle plugin? Check the tools page and edit the version accordingly.
Final product - /build.gradle
// Top-level build file where you can add configuration options common to all sub-projects/modules.
// Running 'gradle wrapper' will generate gradlew - Getting gradle wrapper working and using it will save you a lot of pain.
task wrapper(type: Wrapper) {
gradleVersion = '2.2'
}
// Look Google doesn't use Maven Central, they use jcenter now.
buildscript {
repositories {
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:1.2.0'
// NOTE: Do not place your application dependencies here; they belong
// in the individual module build.gradle files
}
}
allprojects {
repositories {
jcenter()
}
}
Make sure gradle wrapper generates the gradlew file and gradle/wrapper subdirectory. This is a big gotcha.
ndkDirectory
This has come up a number of times, but android.ndkDirectory is the correct way to get the folder after 1.1. Migrating Gradle Projects to version 1.0.0. If you're using an experimental or ancient version of the plugin your mileage may vary.
Xcode 10 Error: Multiple commands produce
Sometimes the reason for this problem is that you have multiple targets that have different iOS deployment target. just check that your targets(for example your main app target and your extensions) have the same iOS deployment target.
Pull new updates from original GitHub repository into forked GitHub repository
Use:
git remote add upstream ORIGINAL_REPOSITORY_URL
This will set your upstream to the repository you forked from.
Then do this:
git fetch upstream
This will fetch all the branches including master from the original repository.
Merge this data in your local master branch:
git merge upstream/master
Push the changes to your forked repository i.e. to origin:
git push origin master
Voila! You are done with the syncing the original repository.
What does '?' do in C++?
This is commonly referred to as the conditional operator, and when used like this:
condition ? result_if_true : result_if_false
... if the condition evaluates to true, the expression evaluates to result_if_true, otherwise it evaluates to result_if_false.
It is syntactic sugar, and in this case, it can be replaced with
int qempty()
{
if(f == r)
{
return 1;
}
else
{
return 0;
}
}
Note: Some people refer to ?: it as "the ternary operator", because it is the only ternary operator (i.e. operator that takes three arguments) in the language they are using.
Init array of structs in Go
You can have it this way:
It is important to mind the commas after each struct item or set of items.
earnings := []LineItemsType{
LineItemsType{
TypeName: "Earnings",
Totals: 0.0,
HasTotal: true,
items: []LineItems{
LineItems{
name: "Basic Pay",
amount: 100.0,
},
LineItems{
name: "Commuter Allowance",
amount: 100.0,
},
},
},
LineItemsType{
TypeName: "Earnings",
Totals: 0.0,
HasTotal: true,
items: []LineItems{
LineItems{
name: "Basic Pay",
amount: 100.0,
},
LineItems{
name: "Commuter Allowance",
amount: 100.0,
},
},
},
}
Get file path of image on Android
Posting to Twitter needs the image's actual path on the device to be sent in the request to post. I was finding it mighty difficult to get the actual path and more often than not I would get the wrong path.
To counter that, once you have a Bitmap, I use that to get the URI from using the getImageUri(). Subsequently, I use the tempUri Uri instance to get the actual path as it is on the device.
This is production code and naturally tested. ;-)
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == CAMERA_REQUEST && resultCode == RESULT_OK) {
Bitmap photo = (Bitmap) data.getExtras().get("data");
imageView.setImageBitmap(photo);
knop.setVisibility(Button.VISIBLE);
// CALL THIS METHOD TO GET THE URI FROM THE BITMAP
Uri tempUri = getImageUri(getApplicationContext(), photo);
// CALL THIS METHOD TO GET THE ACTUAL PATH
File finalFile = new File(getRealPathFromURI(tempUri));
System.out.println(mImageCaptureUri);
}
}
public Uri getImageUri(Context inContext, Bitmap inImage) {
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
inImage.compress(Bitmap.CompressFormat.JPEG, 100, bytes);
String path = Images.Media.insertImage(inContext.getContentResolver(), inImage, "Title", null);
return Uri.parse(path);
}
public String getRealPathFromURI(Uri uri) {
Cursor cursor = getContentResolver().query(uri, null, null, null, null);
cursor.moveToFirst();
int idx = cursor.getColumnIndex(MediaStore.Images.ImageColumns.DATA);
return cursor.getString(idx);
}
What is Join() in jQuery?
You would probably use your example like this
var newText = "<span>" + $("p").text().split(" ").join("</span> <span>") + "</span>";
This will put span tags around all the words in you paragraphs, turning
<p>Test is a demo.</p>
into
<p><span>Test</span> <span>is</span> <span>a</span> <span>demo.</span></p>
I do not know what the practical use of this could be.
How do I position a div relative to the mouse pointer using jQuery?
You don not need to create a $(document).mousemove( function(e) {}) to handle mouse x,y. Get the event in the $.hover function and from there it is possible to get x and y positions of the mouse. See the code below:
$('foo').hover(function(e){
var pos = [e.pageX-150,e.pageY];
$('foo1').dialog( "option", "position", pos );
$('foo1').dialog('open');
},function(){
$('foo1').dialog('close');
});
How to download HTTP directory with all files and sub-directories as they appear on the online files/folders list?
No Software or Plugin required!
(only usable if you don't need recursive deptch)
Use bookmarklet. Drag this link in bookmarks, then edit and paste this code:
(function(){ var arr=[], l=document.links; var ext=prompt("select extension for download (all links containing that, will be downloaded.", ".mp3"); for(var i=0; i<l.length; i++) { if(l[i].href.indexOf(ext) !== false){ l[i].setAttribute("download",l[i].text); l[i].click(); } } })();
and go on page (from where you want to download files), and click that bookmarklet.
Converting xml to string using C#
As Chris suggests, you can do it like this:
public string GetXMLAsString(XmlDocument myxml)
{
return myxml.OuterXml;
}
Or like this:
public string GetXMLAsString(XmlDocument myxml)
{
StringWriter sw = new StringWriter();
XmlTextWriter tx = new XmlTextWriter(sw);
myxml.WriteTo(tx);
string str = sw.ToString();//
return str;
}
and if you really want to create a new XmlDocument then do this
XmlDocument newxmlDoc= myxml
Install Chrome extension form outside the Chrome Web Store
For Windows, you can also whitelist your extension through Windows policies. The full steps are details in this answer, but there are quicker steps:
- Create the registry key
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Google\Chrome\ExtensionInstallWhitelist.
- For each extension you want to whitelist, add a string value whose name should be a sequence number (starting at 1) and value is the extension ID.
For instance, in order to whitelist 2 extensions with ID aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa and bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb, create a string value with name 1 and value aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa, and a second value with name 2 and value bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb. This can be sum up by this registry file:
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Google\Chrome]
[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Google\Chrome\ExtensionInstallWhitelist]
"1"="aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
"2"="bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb"
EDIT: actually, Chromium docs also indicate how to do it for other OS.
Center align with table-cell
This would be easier to do with flexbox. Using flexbox will let you not to specify the height of your content and can adjust automatically on the height it contains.
DEMO
here's the gist of the demo
.container{
display: flex;
height: 100%;
justify-content: center;
align-items: center;
}
html
<div class="container">
<div class='content'> //you can size this anyway you want
put anything you want here,
</div>
</div>
HTTP status code for update and delete?
{
"VALIDATON_ERROR": {
"code": 512,
"message": "Validation error"
},
"CONTINUE": {
"code": 100,
"message": "Continue"
},
"SWITCHING_PROTOCOLS": {
"code": 101,
"message": "Switching Protocols"
},
"PROCESSING": {
"code": 102,
"message": "Processing"
},
"OK": {
"code": 200,
"message": "OK"
},
"CREATED": {
"code": 201,
"message": "Created"
},
"ACCEPTED": {
"code": 202,
"message": "Accepted"
},
"NON_AUTHORITATIVE_INFORMATION": {
"code": 203,
"message": "Non Authoritative Information"
},
"NO_CONTENT": {
"code": 204,
"message": "No Content"
},
"RESET_CONTENT": {
"code": 205,
"message": "Reset Content"
},
"PARTIAL_CONTENT": {
"code": 206,
"message": "Partial Content"
},
"MULTI_STATUS": {
"code": 207,
"message": "Multi-Status"
},
"MULTIPLE_CHOICES": {
"code": 300,
"message": "Multiple Choices"
},
"MOVED_PERMANENTLY": {
"code": 301,
"message": "Moved Permanently"
},
"MOVED_TEMPORARILY": {
"code": 302,
"message": "Moved Temporarily"
},
"SEE_OTHER": {
"code": 303,
"message": "See Other"
},
"NOT_MODIFIED": {
"code": 304,
"message": "Not Modified"
},
"USE_PROXY": {
"code": 305,
"message": "Use Proxy"
},
"TEMPORARY_REDIRECT": {
"code": 307,
"message": "Temporary Redirect"
},
"PERMANENT_REDIRECT": {
"code": 308,
"message": "Permanent Redirect"
},
"BAD_REQUEST": {
"code": 400,
"message": "Bad Request"
},
"UNAUTHORIZED": {
"code": 401,
"message": "Unauthorized"
},
"PAYMENT_REQUIRED": {
"code": 402,
"message": "Payment Required"
},
"FORBIDDEN": {
"code": 403,
"message": "Forbidden"
},
"NOT_FOUND": {
"code": 404,
"message": "Not Found"
},
"METHOD_NOT_ALLOWED": {
"code": 405,
"message": "Method Not Allowed"
},
"NOT_ACCEPTABLE": {
"code": 406,
"message": "Not Acceptable"
},
"PROXY_AUTHENTICATION_REQUIRED": {
"code": 407,
"message": "Proxy Authentication Required"
},
"REQUEST_TIMEOUT": {
"code": 408,
"message": "Request Timeout"
},
"CONFLICT": {
"code": 409,
"message": "Conflict"
},
"GONE": {
"code": 410,
"message": "Gone"
},
"LENGTH_REQUIRED": {
"code": 411,
"message": "Length Required"
},
"PRECONDITION_FAILED": {
"code": 412,
"message": "Precondition Failed"
},
"REQUEST_TOO_LONG": {
"code": 413,
"message": "Request Entity Too Large"
},
"REQUEST_URI_TOO_LONG": {
"code": 414,
"message": "Request-URI Too Long"
},
"UNSUPPORTED_MEDIA_TYPE": {
"code": 415,
"message": "Unsupported Media Type"
},
"REQUESTED_RANGE_NOT_SATISFIABLE": {
"code": 416,
"message": "Requested Range Not Satisfiable"
},
"EXPECTATION_FAILED": {
"code": 417,
"message": "Expectation Failed"
},
"IM_A_TEAPOT": {
"code": 418,
"message": "I'm a teapot"
},
"INSUFFICIENT_SPACE_ON_RESOURCE": {
"code": 419,
"message": "Insufficient Space on Resource"
},
"METHOD_FAILURE": {
"code": 420,
"message": "Method Failure"
},
"UNPROCESSABLE_ENTITY": {
"code": 422,
"message": "Unprocessable Entity"
},
"LOCKED": {
"code": 423,
"message": "Locked"
},
"FAILED_DEPENDENCY": {
"code": 424,
"message": "Failed Dependency"
},
"PRECONDITION_REQUIRED": {
"code": 428,
"message": "Precondition Required"
},
"TOO_MANY_REQUESTS": {
"code": 429,
"message": "Too Many Requests"
},
"REQUEST_HEADER_FIELDS_TOO_LARGE": {
"code": 431,
"message": "Request Header Fields Too"
},
"UNAVAILABLE_FOR_LEGAL_REASONS": {
"code": 451,
"message": "Unavailable For Legal Reasons"
},
"INTERNAL_SERVER_ERROR": {
"code": 500,
"message": "Internal Server Error"
},
"NOT_IMPLEMENTED": {
"code": 501,
"message": "Not Implemented"
},
"BAD_GATEWAY": {
"code": 502,
"message": "Bad Gateway"
},
"SERVICE_UNAVAILABLE": {
"code": 503,
"message": "Service Unavailable"
},
"GATEWAY_TIMEOUT": {
"code": 504,
"message": "Gateway Timeout"
},
"HTTP_VERSION_NOT_SUPPORTED": {
"code": 505,
"message": "HTTP Version Not Supported"
},
"INSUFFICIENT_STORAGE": {
"code": 507,
"message": "Insufficient Storage"
},
"NETWORK_AUTHENTICATION_REQUIRED": {
"code": 511,
"message": "Network Authentication Required"
}
}
Specify the date format in XMLGregorianCalendar
This is an easy way for any format. Just change it to required format string
XMLGregorianCalendar gregFmt = DatatypeFactory.newInstance().newXMLGregorianCalendar(new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss").format(new Date()));
System.out.println(gregFmt);
Convert a tensor to numpy array in Tensorflow?
I have faced and solved the tensor->ndarray conversion in the specific case of tensors representing (adversarial) images, obtained with cleverhans library/tutorials.
I think that my question/answer (here) may be an helpful example also for other cases.
I'm new with TensorFlow, mine is an empirical conclusion:
It seems that tensor.eval() method may need, in order to succeed, also the value for input placeholders.
Tensor may work like a function that needs its input values (provided into feed_dict) in order to return an output value, e.g.
array_out = tensor.eval(session=sess, feed_dict={x: x_input})
Please note that the placeholder name is x in my case, but I suppose you should find out the right name for the input placeholder.
x_input is a scalar value or array containing input data.
In my case also providing sess was mandatory.
My example also covers the matplotlib image visualization part, but this is OT.
How do I update a GitHub forked repository?
Android Studio now has learned to work with GitHub fork repositories (you don't even have to add "upstream" remote repository by console command).
Open menu VCS ? Git
And pay attention to the two last popup menu items:
Rebase my GitHub fork
Create Pull Request
Try them. I use the first one to synchronize my local repository. Anyway the branches from the parent remote repository ("upstream") will be accessible in Android Studio after you click "Rebase my GitHub fork", and you will be able to operate with them easily.
(I use Android Studio 3.0 with "Git integration" and "GitHub" plugins.)
Chrome net::ERR_INCOMPLETE_CHUNKED_ENCODING error
In my case, it was a sloppy application issue. An AJAX call is being made to a PHP which had sloppy includes (there was trailing white space after the PHP closing delimiter in two of the includes). This meant that spaces were being output to the response ahead of the expected JSON output. I only discovered this when I put a Header for JSON output just ahead of the response, and the chunking error was replaced by the error that "headers could not be sent because output had occurred". In other words, the AJAX was expecting a JSON response, and it got that - sort of - but the response wasn't clean because a JSON response shouldn't have white ahead of it. This was apparent when looking at the Response from the PHP in Firebug Network - the response looked right justified in the panel because of the leading spaces. Strangely, not all white space triggered the error - the chunking error only occurred when the entire length of the response exceeded some certain length.
Git - How to close commit editor?
After git commit command, you entered to the editor, so first hit i then start typing. After committing your message hit Ctrl + c then :wq
What is "String args[]"? parameter in main method Java
In Java args contains the supplied command-line arguments as an array of String objects.
In other words, if you run your program as java MyProgram one two then args will contain ["one", "two"].
If you wanted to output the contents of args, you can just loop through them like this...
public class ArgumentExample {
public static void main(String[] args) {
for(int i = 0; i < args.length; i++) {
System.out.println(args[i]);
}
}
}
MySQL TEXT vs BLOB vs CLOB
It's worth to mention that CLOB / BLOB data types and their sizes are supported by MySQL 5.0+, so you can choose the proper data type for your need.
http://dev.mysql.com/doc/refman/5.7/en/storage-requirements.html
Data Type Date Type Storage Required
(CLOB) (BLOB)
TINYTEXT TINYBLOB L + 1 bytes, where L < 2**8 (255)
TEXT BLOB L + 2 bytes, where L < 2**16 (64 K)
MEDIUMTEXT MEDIUMBLOB L + 3 bytes, where L < 2**24 (16 MB)
LONGTEXT LONGBLOB L + 4 bytes, where L < 2**32 (4 GB)
where L stands for the byte length of a string
How do I write the 'cd' command in a makefile?
Starting from GNU make 3.82 (July 2010), you can use the .ONESHELL special target to run all recipe lines in a single instantiation of the shell (bold emphasis mine):
- New special target:
.ONESHELL instructs make to invoke a single instance of the shell and provide it with the entire recipe, regardless of how many lines it contains.
.ONESHELL: # Only applies to all target
all:
cd ~/some_dir
pwd # Prints ~/some_dir if cd succeeded
another_rule:
cd ~/some_dir
pwd # Oops, prints ~
How do I convert special UTF-8 chars to their iso-8859-1 equivalent using javascript?
Actually, everything is typically stored as Unicode of some kind internally, but lets not go into that. I'm assuming you're getting the iconic "åäö" type strings because you're using an ISO-8859 as your character encoding. There's a trick you can do to convert those characters. The escape and unescape functions used for encoding and decoding query strings are defined for ISO characters, whereas the newer encodeURIComponent and decodeURIComponent which do the same thing, are defined for UTF8 characters.
escape encodes extended ISO-8859-1 characters (UTF code points U+0080-U+00ff) as %xx (two-digit hex) whereas it encodes UTF codepoints U+0100 and above as %uxxxx (%u followed by four-digit hex.) For example, escape("å") == "%E5" and escape("?") == "%u3042".
encodeURIComponent percent-encodes extended characters as a UTF8 byte sequence. For example, encodeURIComponent("å") == "%C3%A5" and encodeURIComponent("?") == "%E3%81%82".
So you can do:
fixedstring = decodeURIComponent(escape(utfstring));
For example, an incorrectly encoded character "å" becomes "Ã¥". The command does escape("Ã¥") == "%C3%A5" which is the two incorrect ISO characters encoded as single bytes. Then decodeURIComponent("%C3%A5") == "å", where the two percent-encoded bytes are being interpreted as a UTF8 sequence.
If you'd need to do the reverse for some reason, that works too:
utfstring = unescape(encodeURIComponent(originalstring));
Is there a way to differentiate between bad UTF8 strings and ISO strings? Turns out there is. The decodeURIComponent function used above will throw an error if given a malformed encoded sequence. We can use this to detect with a great probability whether our string is UTF8 or ISO.
var fixedstring;
try{
// If the string is UTF-8, this will work and not throw an error.
fixedstring=decodeURIComponent(escape(badstring));
}catch(e){
// If it isn't, an error will be thrown, and we can assume that we have an ISO string.
fixedstring=badstring;
}
Set environment variables from file of key/value pairs
Not exactly sure why, or what I missed, but after running trough most of the answers and failing. I realized that with this .env file:
MY_VAR="hello there!"
MY_OTHER_VAR=123
I could simply do this:
source .env
echo $MY_VAR
Outputs: Hello there!
Seems to work just fine in Ubuntu linux.
How to generate the "create table" sql statement for an existing table in postgreSQL
My solution is to log in to the postgres db using psql with the -E option as follows:
psql -E -U username -d database
In psql, run the following commands to see the sql that postgres uses to generate
the describe table statement:
-- List all tables in the schema (my example schema name is public)
\dt public.*
-- Choose a table name from above
-- For create table of one public.tablename
\d+ public.tablename
Based on the sql echoed out after running these describe commands, I was able to put together
the following plpgsql function:
CREATE OR REPLACE FUNCTION generate_create_table_statement(p_table_name varchar)
RETURNS text AS
$BODY$
DECLARE
v_table_ddl text;
column_record record;
BEGIN
FOR column_record IN
SELECT
b.nspname as schema_name,
b.relname as table_name,
a.attname as column_name,
pg_catalog.format_type(a.atttypid, a.atttypmod) as column_type,
CASE WHEN
(SELECT substring(pg_catalog.pg_get_expr(d.adbin, d.adrelid) for 128)
FROM pg_catalog.pg_attrdef d
WHERE d.adrelid = a.attrelid AND d.adnum = a.attnum AND a.atthasdef) IS NOT NULL THEN
'DEFAULT '|| (SELECT substring(pg_catalog.pg_get_expr(d.adbin, d.adrelid) for 128)
FROM pg_catalog.pg_attrdef d
WHERE d.adrelid = a.attrelid AND d.adnum = a.attnum AND a.atthasdef)
ELSE
''
END as column_default_value,
CASE WHEN a.attnotnull = true THEN
'NOT NULL'
ELSE
'NULL'
END as column_not_null,
a.attnum as attnum,
e.max_attnum as max_attnum
FROM
pg_catalog.pg_attribute a
INNER JOIN
(SELECT c.oid,
n.nspname,
c.relname
FROM pg_catalog.pg_class c
LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
WHERE c.relname ~ ('^('||p_table_name||')$')
AND pg_catalog.pg_table_is_visible(c.oid)
ORDER BY 2, 3) b
ON a.attrelid = b.oid
INNER JOIN
(SELECT
a.attrelid,
max(a.attnum) as max_attnum
FROM pg_catalog.pg_attribute a
WHERE a.attnum > 0
AND NOT a.attisdropped
GROUP BY a.attrelid) e
ON a.attrelid=e.attrelid
WHERE a.attnum > 0
AND NOT a.attisdropped
ORDER BY a.attnum
LOOP
IF column_record.attnum = 1 THEN
v_table_ddl:='CREATE TABLE '||column_record.schema_name||'.'||column_record.table_name||' (';
ELSE
v_table_ddl:=v_table_ddl||',';
END IF;
IF column_record.attnum <= column_record.max_attnum THEN
v_table_ddl:=v_table_ddl||chr(10)||
' '||column_record.column_name||' '||column_record.column_type||' '||column_record.column_default_value||' '||column_record.column_not_null;
END IF;
END LOOP;
v_table_ddl:=v_table_ddl||');';
RETURN v_table_ddl;
END;
$BODY$
LANGUAGE 'plpgsql' COST 100.0 SECURITY INVOKER;
Here is the function usage:
SELECT generate_create_table_statement('tablename');
And here is the drop statement if you don't want this function to persist permanently:
DROP FUNCTION generate_create_table_statement(p_table_name varchar);
How to implement the Android ActionBar back button?
Building on Jared's answer, I had to enable and implement the action bar back button behavior in several activities and created this helper class to reduce code duplication.
public final class ActionBarHelper {
public static void enableBackButton(AppCompatActivity context) {
if(context == null) return;
ActionBar actionBar = context.getSupportActionBar();
if (actionBar == null) return;
actionBar.setDisplayHomeAsUpEnabled(true);
}
}
Usage in an activity:
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
...
ActionBarHelper.enableBackButton(this);
}
When to use single quotes, double quotes, and backticks in MySQL
If table cols and values are variables then there are two ways:
With double quotes "" the complete query:
$query = "INSERT INTO $table_name (id, $col1, $col2)
VALUES (NULL, '$val1', '$val2')";
Or
$query = "INSERT INTO ".$table_name." (id, ".$col1.", ".$col2.")
VALUES (NULL, '".$val1."', '".$val2."')";
With single quotes '':
$query = 'INSERT INTO '.$table_name.' (id, '.$col1.', '.$col2.')
VALUES (NULL, '.$val1.', '.$val2.')';
Use back ticks `` when a column/value name is similar to a MySQL reserved keyword.
Note: If you are denoting a column name with a table name then use back ticks like this:
`table_name`. `column_name` <-- Note: exclude . from back ticks.
Common elements in two lists
Using Java 8's Stream.filter() method in combination with List.contains():
import static java.util.Arrays.asList;
import static java.util.stream.Collectors.toList;
/* ... */
List<Integer> list1 = asList(1, 2, 3, 4, 5);
List<Integer> list2 = asList(1, 3, 5, 7, 9);
List<Integer> common = list1.stream().filter(list2::contains).collect(toList());
Add a CSS border on hover without moving the element
You can make the border transparent. In this way it exists, but is invisible, so it doesn't push anything around:
_x000D_
_x000D_
.jobs .item {
background: #eee;
border: 1px solid transparent;
}
.jobs .item:hover {
background: #e1e1e1;
border: 1px solid #d0d0d0;
}
_x000D_
<div class="jobs">
<div class="item">Item</div>
</div>
_x000D_
_x000D_
_x000D_
For elements that already have a border, and you don't want them to move, you can use negative margins:
_x000D_
_x000D_
.jobs .item {
background: #eee;
border: 1px solid #d0d0d0;
}
.jobs .item:hover {
background: #e1e1e1;
border: 3px solid #d0d0d0;
margin: -2px;
}
_x000D_
<div class="jobs">
<div class="item">Item</div>
</div>
_x000D_
_x000D_
_x000D_
Another possible trick for adding width to an existing border is to add a box-shadow with the spread attribute of the desired pixel width.
_x000D_
_x000D_
.jobs .item {
background: #eee;
border: 1px solid #d0d0d0;
}
.jobs .item:hover {
background: #e1e1e1;
box-shadow: 0 0 0 2px #d0d0d0;
}
_x000D_
<div class="jobs">
<div class="item">Item</div>
</div>
_x000D_
_x000D_
_x000D_
Create Directory When Writing To File In Node.js
Since I cannot comment yet, I'm posting an enhanced answer based on @tiago-peres-frança fantastic solution (thanks!). His code does not make directory in a case where only the last directory is missing in the path, e.g. the input is "C:/test/abc" and "C:/test" already exists. Here is a snippet that works:
function mkdirp(filepath) {
var dirname = path.dirname(filepath);
if (!fs.existsSync(dirname)) {
mkdirp(dirname);
}
fs.mkdirSync(filepath);
}
z-index not working with fixed positioning
This question can be solved in a number of ways, but really, knowing the stacking rules allows you to find the best answer that works for you.
Solutions
The <html> element is your only stacking context, so just follow the stacking rules inside a stacking context and you will see that elements are stacked in this order
- The stacking context’s root element (the
<html> element in this case)
- Positioned elements (and their children) with negative z-index values (higher values are stacked in front of lower values; elements with the same value are stacked according to appearance in the HTML)
- Non-positioned elements (ordered by appearance in the HTML)
- Positioned elements (and their children) with a z-index value of auto (ordered by appearance in the HTML)
- Positioned elements (and their children) with positive z-index values (higher values are stacked in front of lower values; elements with the same value are stacked according to appearance in the HTML)
So you can
- set a z-index of -1, for
#under positioned -ve z-index appear behind non-positioned #over element
- set the position of
#over to relative so that rule 5 applies to it
The Real Problem
Developers should know the following before trying to change the stacking order of elements.
- When a stacking context is formed
- By default, the
<html> element is the root element and is the first stacking context
- Stacking order within a stacking context
The Stacking order and stacking context rules below are from this link
When a stacking context is formed
- When an element is the root element of a document (the
<html> element)
- When an element has a position value other than static and a z-index value other than auto
- When an element has an opacity value less than 1
- Several newer CSS properties also create stacking contexts. These include: transforms, filters, css-regions, paged media, and possibly others. https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Positioning/Understanding_z_index/The_stacking_context
- As a general rule, it seems that if a CSS property requires rendering in an offscreen context, it must create a new stacking context.
Stacking Order within a Stacking Context
The order of elements:
- The stacking context’s root element (the
<html> element is the only stacking context by default, but any element can be a root element for a stacking context, see rules above)
- You cannot put a child element behind a root stacking context element
- Positioned elements (and their children) with negative z-index values (higher values are stacked in front of lower values; elements with the same value are stacked according to appearance in the HTML)
- Non-positioned elements (ordered by appearance in the HTML)
- Positioned elements (and their children) with a z-index value of auto (ordered by appearance in the HTML)
- Positioned elements (and their children) with positive z-index values (higher values are stacked in front of lower values; elements with the same value are stacked according to appearance in the HTML)
How can I make Bootstrap 4 columns all the same height?
Equal height columns is the default behaviour for Bootstrap 4 grids.
_x000D_
_x000D_
.col { background: red; }_x000D_
.col:nth-child(odd) { background: yellow; }
_x000D_
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css" integrity="sha384-rwoIResjU2yc3z8GV/NPeZWAv56rSmLldC3R/AZzGRnGxQQKnKkoFVhFQhNUwEyJ" crossorigin="anonymous">_x000D_
_x000D_
<div class="container">_x000D_
<div class="row">_x000D_
<div class="col">_x000D_
1 of 3_x000D_
</div>_x000D_
<div class="col">_x000D_
1 of 3_x000D_
<br>_x000D_
Line 2_x000D_
<br>_x000D_
Line 3_x000D_
</div>_x000D_
<div class="col">_x000D_
1 of 3_x000D_
</div>_x000D_
</div>_x000D_
</div>
_x000D_
_x000D_
_x000D_
OraOLEDB.Oracle provider is not registered on the local machine
If you are getting this in a C# projet, check if you are running in 64-bit or 32-bit mode with the following code:
if (IntPtr.Size == 4)
{
Console.WriteLine("This is 32-Bit!");
}
else if (IntPtr.Size == 8)
{
Console.WriteLine("This is 64 Bit!");
}
If you find that you are running in 64-Bit mode, you may want to try switching to 32-Bit (or vice versa). You can follow this guide to force your application to run as 64 or 32 bit (X64 and X86 respectively). You have to make sure that Platform Target in your project properties is not set to Any CPU and that it is explicitley set.
Switching that option from Any CPU to X86 resolved my error and I was able to connect to the Oracle provider.
How to initialize a nested struct?
Well, any specific reason to not make Proxy its own struct?
Anyway you have 2 options:
The proper way, simply move proxy to its own struct, for example:
type Configuration struct {
Val string
Proxy Proxy
}
type Proxy struct {
Address string
Port string
}
func main() {
c := &Configuration{
Val: "test",
Proxy: Proxy{
Address: "addr",
Port: "port",
},
}
fmt.Println(c)
fmt.Println(c.Proxy.Address)
}
The less proper and ugly way but still works:
c := &Configuration{
Val: "test",
Proxy: struct {
Address string
Port string
}{
Address: "addr",
Port: "80",
},
}
My kubernetes pods keep crashing with "CrashLoopBackOff" but I can't find any log
If you have an application that takes slower to bootstrap, it could be related to the initial values of the readiness/liveness probes. I solved my problem by increasing the value of initialDelaySeconds to 120s as my SpringBoot application deals with a lot of initialization. The documentation does not mention the default 0 (https://kubernetes.io/docs/api-reference/v1.9/#probe-v1-core)
service:
livenessProbe:
httpGet:
path: /health/local
scheme: HTTP
port: 8888
initialDelaySeconds: 120
periodSeconds: 5
timeoutSeconds: 5
failureThreshold: 10
readinessProbe:
httpGet:
path: /admin/health
scheme: HTTP
port: 8642
initialDelaySeconds: 150
periodSeconds: 5
timeoutSeconds: 5
failureThreshold: 10
A very good explanation about those values is given by What is the default value of initialDelaySeconds.
The health or readiness check algorithm works like:
- wait for
initialDelaySeconds
- perform check and wait
timeoutSeconds for a timeout
if the number of continued successes is greater than successThreshold return success
- if the number of continued failures is greater than
failureThreshold return failure otherwise wait periodSeconds and start a new check
In my case, my application can now bootstrap in a very clear way, so that I know I will not get periodic crashloopbackoff because sometimes it would be on the limit of those rates.
Share data between AngularJS controllers
Just do it simple (tested with v1.3.15):
<article ng-controller="ctrl1 as c1">
<label>Change name here:</label>
<input ng-model="c1.sData.name" />
<h1>Control 1: {{c1.sData.name}}, {{c1.sData.age}}</h1>
</article>
<article ng-controller="ctrl2 as c2">
<label>Change age here:</label>
<input ng-model="c2.sData.age" />
<h1>Control 2: {{c2.sData.name}}, {{c2.sData.age}}</h1>
</article>
<script>
var app = angular.module("MyApp", []);
var dummy = {name: "Joe", age: 25};
app.controller("ctrl1", function () {
this.sData = dummy;
});
app.controller("ctrl2", function () {
this.sData = dummy;
});
</script>
Effects of the extern keyword on C functions
As far as I remember the standard, all function declarations are considered as "extern" by default, so there is no need to specify it explicitly.
That doesn't make this keyword useless since it can also be used with variables (and it that case - it's the only solution to solve linkage problems). But with the functions - yes, it's optional.
"android.view.WindowManager$BadTokenException: Unable to add window" on buider.show()
- first you cannot extend AsyncTask without override doInBackground
second try to create AlterDailog from the builder then call show().
private boolean visible = false;
class chkSubscription extends AsyncTask<String, Void, String>
{
protected void onPostExecute(String result)
{
AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
builder.setCancelable(true);
builder.setMessage(sucObject);
builder.setInverseBackgroundForced(true);
builder.setNeutralButton("Ok", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton)
{
dialog.dismiss();
}
});
AlertDialog myAlertDialog = builder.create();
if(visible) myAlertDialog.show();
}
@Override
protected String doInBackground(String... arg0)
{
// TODO Auto-generated method stub
return null;
}
}
@Override
protected void onResume()
{
// TODO Auto-generated method stub
super.onResume();
visible = true;
}
@Override
protected void onStop()
{
visible = false;
super.onStop();
}
Bootstrap Modal sitting behind backdrop
if you have nested modals this is the clue :
$('body').on('shown.bs.modal', '.modal', function (e) {
e.stopPropagation();
$(this).css("z-index", parseInt($('.modal-backdrop').css('z-index')) + 1);
});
Create web service proxy in Visual Studio from a WSDL file
Using WSDL.exe didn't work for me (gave me an error about a missing type), but I was able to right-click on my project in VS and select "Add Service Reference." I entered the path to the wsdl file in the Address field and hit "Go." That seemed to be able to find all the proper types and added the classes directly to my project.
Word-wrap in an HTML table
You can try this if it suits you...
Put a textarea inside your td and disable it with background color white and define its number of rows.
<table style="width: 100%;">
<tr>
<td>
<textarea rows="4" style="background-color:white;border: none;" disabled> Looooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooong word
</textarea>
</td>
<td><span style="display: inline;">Short word</span></td>
</tr>
</table>
How do I find out if the GPS of an Android device is enabled
yes GPS settings cannot be changed programatically any more as they are privacy settings and we have to check if they are switched on or not from the program and handle it if they are not switched on.
you can notify the user that GPS is turned off and use something like this to show the settings screen to the user if you want.
Check if location providers are available
String provider = Settings.Secure.getString(getContentResolver(), Settings.Secure.LOCATION_PROVIDERS_ALLOWED);
if(provider != null){
Log.v(TAG, " Location providers: "+provider);
//Start searching for location and update the location text when update available
startFetchingLocation();
}else{
// Notify users and show settings if they want to enable GPS
}
If the user want to enable GPS you may show the settings screen in this way.
Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
startActivityForResult(intent, REQUEST_CODE);
And in your onActivityResult you can see if the user has enabled it or not
protected void onActivityResult(int requestCode, int resultCode, Intent data){
if(requestCode == REQUEST_CODE && resultCode == 0){
String provider = Settings.Secure.getString(getContentResolver(), Settings.Secure.LOCATION_PROVIDERS_ALLOWED);
if(provider != null){
Log.v(TAG, " Location providers: "+provider);
//Start searching for location and update the location text when update available.
// Do whatever you want
startFetchingLocation();
}else{
//Users did not switch on the GPS
}
}
}
Thats one way to do it and i hope it helps.
Let me know if I am doing anything wrong.
Declare a constant array
From Effective Go:
Constants in Go are just that—constant. They are created at compile time, even when defined as locals in functions, and can only be numbers, characters (runes), strings or booleans. Because of the compile-time restriction, the expressions that define them must be constant expressions, evaluatable by the compiler. For instance, 1<<3 is a constant expression, while math.Sin(math.Pi/4) is not because the function call to math.Sin needs to happen at run time.
Slices and arrays are always evaluated during runtime:
var TestSlice = []float32 {.03, .02}
var TestArray = [2]float32 {.03, .02}
var TestArray2 = [...]float32 {.03, .02}
[...] tells the compiler to figure out the length of the array itself. Slices wrap arrays and are easier to work with in most cases. Instead of using constants, just make the variables unaccessible to other packages by using a lower case first letter:
var ThisIsPublic = [2]float32 {.03, .02}
var thisIsPrivate = [2]float32 {.03, .02}
thisIsPrivate is available only in the package it is defined. If you need read access from outside, you can write a simple getter function (see Getters in golang).
Get first date of current month in java
In order to get a Date (that can be used in JPA later on), I did
Date startOfMonth = Date.from(LocalDate.now().withDayOfMonth(1).atStartOfDay().toInstant(ZoneOffset.UTC));
- I take current date LocalDate.now()
- Move it to first day of the month withDayOfMonth(1)
- Move it to the sart of the day atStartOfDay() to get rid of hours and minutes
- and deal with the TimeZone issues by changing it into an Instant with the "right" ZoneOffset.
Where is `%p` useful with printf?
The size of the pointer may be something different than that of int. Also an implementation could produce better than simple hex value representation of the address when you use %p.
To switch from vertical split to horizontal split fast in Vim
Vim mailing list says (re-formatted for better readability):
To change two vertically split
windows to horizonally split
Ctrl-w t Ctrl-w K
Horizontally to vertically:
Ctrl-w t Ctrl-w H
Explanations:
Ctrl-w t makes the first (topleft) window current
Ctrl-w K moves the current window to full-width at the very top
Ctrl-w H moves the current window to full-height at far left
Note that the t is lowercase, and the K and H are uppercase.
Also, with only two windows, it seems like you can drop the Ctrl-w t part because if you're already in one of only two windows, what's the point of making it current?
Cordova app not displaying correctly on iPhone X (Simulator)
For a manual fix to an existing cordova project
The black bars
Add this to your info.plist file. Fixing the launch image is a separate issue i.e. How to Add iPhoneX Launch Image
<key>UILaunchStoryboardName</key>
<string>CDVLaunchScreen</string>
The white bars
Set viewport-fit=cover in the meta tag
<meta name="viewport" content="initial-scale=1, width=device-width, height=device-height, viewport-fit=cover">
How to delete from multiple tables in MySQL?
I don't have a mysql database to test on at the moment, but have you tried specifying what to delete prior to the from clause? For example:
DELETE p, pa FROM `pets` p,
`pets_activities` pa
WHERE p.`order` > :order
AND p.`pet_id` = :pet_id
AND pa.`id` = p.`pet_id`
I think the syntax you used is limited to newer versions of mysql.
How to use the ConfigurationManager.AppSettings
ConfigurationManager.AppSettings is actually a property, so you need to use square brackets.
Overall, here's what you need to do:
SqlConnection con= new SqlConnection(ConfigurationManager.AppSettings["ConnectionString"]);
The problem is that you tried to set con to a string, which is not correct.
You have to either pass it to the constructor or set con.ConnectionString property.
How to get "their" changes in the middle of conflicting Git rebase?
You want to use:
git checkout --ours foo/bar.java
git add foo/bar.java
If you rebase a branch feature_x against main (i.e. running git rebase main while on branch feature_x), during rebasing ours refers to main and theirs to feature_x.
As pointed out in the git-rebase docs:
Note that a rebase merge works by replaying each commit from the
working branch on top of the branch. Because of this, when
a merge conflict happens, the side reported as ours is the so-far
rebased series, starting with <upstream>, and theirs is the working
branch. In other words, the sides are swapped.
For further details read this thread.
Build fat static library (device + simulator) using Xcode and SDK 4+
I have spent many hours trying to build a fat static library that will work on armv7, armv7s, and the simulator. Finally found a solution.
The gist is to build the two libraries (one for the device and then one for the simulator) separately, rename them to distinguish from each other, and then lipo -create them into one library.
lipo -create libPhone.a libSimulator.a -output libUniversal.a
I tried it and it works!
JWT (Json Web Token) Audience "aud" versus Client_Id - What's the difference?
If you came here searching OpenID Connect (OIDC): OAuth 2.0 != OIDC
I recognize that this is tagged for oauth 2.0 and NOT OIDC, however there is frequently a conflation between the 2 standards since both standards can use JWTs and the aud claim. And one (OIDC) is basically an extension of the other (OAUTH 2.0). (I stumbled across this question looking for OIDC myself.)
OAuth 2.0 Access Tokens##
For OAuth 2.0 Access tokens, existing answers pretty well cover it. Additionally here is one relevant section from OAuth 2.0 Framework (RFC 6749)
For public clients using implicit flows, this specification does not
provide any method for the client to determine what client an access
token was issued to.
...
Authenticating resource owners to clients is out of scope for this
specification. Any specification that uses the authorization process
as a form of delegated end-user authentication to the client (e.g.,
third-party sign-in service) MUST NOT use the implicit flow without
additional security mechanisms that would enable the client to
determine if the access token was issued for its use (e.g., audience-
restricting the access token).
OIDC ID Tokens##
OIDC has ID Tokens in addition to Access tokens. The OIDC spec is explicit on the use of the aud claim in ID Tokens. (openid-connect-core-1.0)
aud
REQUIRED. Audience(s) that this ID Token is intended for. It MUST contain the OAuth 2.0 client_id of the Relying Party as an audience value. It MAY also contain identifiers for other audiences. In the general case, the aud value is an array of case sensitive strings. In the common special case when there is one audience, the aud value MAY be a single case sensitive string.
furthermore OIDC specifies the azp claim that is used in conjunction with aud when aud has more than one value.
azp
OPTIONAL. Authorized party - the party to which the ID Token was issued. If present, it MUST contain the OAuth 2.0 Client ID of this party. This Claim is only needed when the ID Token has a single audience value and that audience is different than the authorized party. It MAY be included even when the authorized party is the same as the sole audience. The azp value is a case sensitive string containing a StringOrURI value.
Insert default value when parameter is null
Don't specify the column or value when inserting and the DEFAULT constaint's value will be substituted for the missing value.
I don't know how this would work in a single column table. I mean: it would, but it wouldn't be very useful.
org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'customerService' is defined
Just another possibility:
Spring initializes bean by type not by name if you don't define bean with a name, which is ok if you use it by its type:
Producer:
@Service
public void FooServiceImpl implements FooService{}
Consumer:
@Autowired
private FooService fooService;
or
@Autowired
private void setFooService(FooService fooService) {}
but not ok if you use it by name:
ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
ctx.getBean("fooService");
It would complain: org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'fooService' is defined
In this case, assigning name to @Service("fooService") would make it work.
Swift how to sort array of custom objects by property value
If you are going to be sorting this array in more than one place, it may make sense to make your array type Comparable.
class MyImageType: Comparable, Printable {
var fileID: Int
// For Printable
var description: String {
get {
return "ID: \(fileID)"
}
}
init(fileID: Int) {
self.fileID = fileID
}
}
// For Comparable
func <(left: MyImageType, right: MyImageType) -> Bool {
return left.fileID < right.fileID
}
// For Comparable
func ==(left: MyImageType, right: MyImageType) -> Bool {
return left.fileID == right.fileID
}
let one = MyImageType(fileID: 1)
let two = MyImageType(fileID: 2)
let twoA = MyImageType(fileID: 2)
let three = MyImageType(fileID: 3)
let a1 = [one, three, two]
// return a sorted array
println(sorted(a1)) // "[ID: 1, ID: 2, ID: 3]"
var a2 = [two, one, twoA, three]
// sort the array 'in place'
sort(&a2)
println(a2) // "[ID: 1, ID: 2, ID: 2, ID: 3]"
How do I create a self-signed certificate for code signing on Windows?
Updated Answer
If you are using the following Windows versions or later: Windows Server 2012, Windows Server 2012 R2, or Windows 8.1 then MakeCert is now deprecated, and Microsoft recommends using the PowerShell Cmdlet New-SelfSignedCertificate.
If you're using an older version such as Windows 7, you'll need to stick with MakeCert or another solution. Some people suggest the Public Key Infrastructure Powershell (PSPKI) Module.
Original Answer
While you can create a self-signed code-signing certificate (SPC - Software Publisher Certificate) in one go, I prefer to do the following:
Creating a self-signed certificate authority (CA)
makecert -r -pe -n "CN=My CA" -ss CA -sr CurrentUser ^
-a sha256 -cy authority -sky signature -sv MyCA.pvk MyCA.cer
(^ = allow batch command-line to wrap line)
This creates a self-signed (-r) certificate, with an exportable private key (-pe). It's named "My CA", and should be put in the CA store for the current user. We're using the SHA-256 algorithm. The key is meant for signing (-sky).
The private key should be stored in the MyCA.pvk file, and the certificate in the MyCA.cer file.
Importing the CA certificate
Because there's no point in having a CA certificate if you don't trust it, you'll need to import it into the Windows certificate store. You can use the Certificates MMC snapin, but from the command line:
certutil -user -addstore Root MyCA.cer
Creating a code-signing certificate (SPC)
makecert -pe -n "CN=My SPC" -a sha256 -cy end ^
-sky signature ^
-ic MyCA.cer -iv MyCA.pvk ^
-sv MySPC.pvk MySPC.cer
It is pretty much the same as above, but we're providing an issuer key and certificate (the -ic and -iv switches).
We'll also want to convert the certificate and key into a PFX file:
pvk2pfx -pvk MySPC.pvk -spc MySPC.cer -pfx MySPC.pfx
If you want to protect the PFX file, add the -po switch, otherwise PVK2PFX creates a PFX file with no passphrase.
Using the certificate for signing code
signtool sign /v /f MySPC.pfx ^
/t http://timestamp.url MyExecutable.exe
(See why timestamps may matter)
If you import the PFX file into the certificate store (you can use PVKIMPRT or the MMC snapin), you can sign code as follows:
signtool sign /v /n "Me" /s SPC ^
/t http://timestamp.url MyExecutable.exe
Some possible timestamp URLs for signtool /t are:
http://timestamp.verisign.com/scripts/timstamp.dllhttp://timestamp.globalsign.com/scripts/timstamp.dllhttp://timestamp.comodoca.com/authenticode
Full Microsoft documentation
Downloads
For those who are not .NET developers, you will need a copy of the Windows SDK and .NET framework. A current link is available here: SDK & .NET (which installs makecert in C:\Program Files\Microsoft SDKs\Windows\v7.1). Your mileage may vary.
MakeCert is available from the Visual Studio Command Prompt. Visual Studio 2015 does have it, and it can be launched from the Start Menu in Windows 7 under "Developer Command Prompt for VS 2015" or "VS2015 x64 Native Tools Command Prompt" (probably all of them in the same folder).
How can I echo HTML in PHP?
Basically you can put HTML anywhere outside of PHP tags. It's also very beneficial to do all your necessary data processing before displaying any data, in order to separate logic and presentation.
The data display itself could be at the bottom of the same PHP file or you could include a separate PHP file consisting of mostly HTML.
I prefer this compact style:
<?php
/* do your processing here */
?>
<html>
<head>
<title><?=$title?></title>
</head>
<body>
<?php foreach ( $something as $item ) : ?>
<p><?=$item?></p>
<?php endforeach; ?>
</body>
</html>
Note: you may need to use <?php echo $var; ?> instead of <?=$var?> depending on your PHP setup.
Get Folder Size from Windows Command Line
I guess this would only work if the directory is fairly static and its contents don't change between the execution of the two dir commands. Maybe a way to combine this into one command to avoid that, but this worked for my purpose (I didn't want the full listing; just the summary).
GetDirSummary.bat Script:
@echo off
rem get total number of lines from dir output
FOR /F "delims=" %%i IN ('dir /S %1 ^| find "asdfasdfasdf" /C /V') DO set lineCount=%%i
rem dir summary is always last 3 lines; calculate starting line of summary info
set /a summaryStart="lineCount-3"
rem now output just the last 3 lines
dir /S %1 | more +%summaryStart%
Usage:
GetDirSummary.bat c:\temp
Output:
Total Files Listed:
22 File(s) 63,600 bytes
8 Dir(s) 104,350,330,880 bytes free
String to object in JS
This simple way...
var string = "{firstName:'name1', lastName:'last1'}";
eval('var obj='+string);
alert(obj.firstName);
output
name1
nvarchar(max) vs NText
VARCHAR(MAX) is big enough to accommodate TEXT field. TEXT, NTEXT and IMAGE data types of SQL Server 2000 will be deprecated in future version of SQL Server, SQL Server 2005 provides backward compatibility to data types but it is recommended to use new data types which are VARCHAR(MAX), NVARCHAR(MAX) and VARBINARY(MAX).
Convert floats to ints in Pandas?
Considering the following data frame:
>>> df = pd.DataFrame(10*np.random.rand(3, 4), columns=list("ABCD"))
>>> print(df)
... A B C D
... 0 8.362940 0.354027 1.916283 6.226750
... 1 1.988232 9.003545 9.277504 8.522808
... 2 1.141432 4.935593 2.700118 7.739108
Using a list of column names, change the type for multiple columns with applymap():
>>> cols = ['A', 'B']
>>> df[cols] = df[cols].applymap(np.int64)
>>> print(df)
... A B C D
... 0 8 0 1.916283 6.226750
... 1 1 9 9.277504 8.522808
... 2 1 4 2.700118 7.739108
Or for a single column with apply():
>>> df['C'] = df['C'].apply(np.int64)
>>> print(df)
... A B C D
... 0 8 0 1 6.226750
... 1 1 9 9 8.522808
... 2 1 4 2 7.739108
What is Java Servlet?
What is a Servlet?
- A servlet is simply a class which responds to a particular type of network request - most commonly an HTTP request.
- Basically servlets are usually used to implement web applications - but there are also various frameworks which operate on top of servlets (e.g. Struts) to give a higher-level abstraction than the "here's an HTTP request, write to this HTTP response" level which servlets provide.
Servlets run in a servlet container which handles the networking side (e.g. parsing an HTTP request, connection handling etc). One of the best-known open source servlet containers is Tomcat.
In a request/response paradigm, a web server can serve only static pages to the client
- To serve dynamic pages, a we require Servlets.
- Servlet is nothing but a Java program
- This Java program doesn’t have a main method. It only has some callback methods.
- How does the web server communicate to the servlet? Via container or Servlet engine.
- Servlet lives and dies within a web container.
- Web container is responsible for invoking methods in a servlets. It knows what callback methods the Servlet has.
Flow of Request
- Client sends HTTP request to Web server
- Web server forwards that HTTP request to web container.
- Since Servlet can not understand HTTP, its a Java program, it only understands objects, so web container converts that request into valid request object
- Web container spins a thread for each request
- All the business logic goes inside doGet() or doPost() callback methods inside the servlets
- Servlet builds a Java response object and sends it to the container. It converts that to HTTP response again to send it to the client
How does the Container know which Servlet client has requested for?
How to "install" Servlets?
* Well, the servlet objects are inherited from the library- javax.servlet.* . Tomcat and Spring can be used to utilize these objects to fit the use case.
Ref- Watch this on 1.5x- https://www.youtube.com/watch?v=tkFRGdUgCsE . This has an awesome explanation.
How to create JSON object Node.js
The other answers are helpful, but the JSON in your question isn't valid. I have formatted it to make it clearer below, note the missing single quote on line 24.
1 {
2 'Orientation Sensor':
3 [
4 {
5 sampleTime: '1450632410296',
6 data: '76.36731:3.4651554:0.5665419'
7 },
8 {
9 sampleTime: '1450632410296',
10 data: '78.15431:0.5247617:-0.20050584'
11 }
12 ],
13 'Screen Orientation Sensor':
14 [
15 {
16 sampleTime: '1450632410296',
17 data: '255.0:-1.0:0.0'
18 }
19 ],
20 'MPU6500 Gyroscope sensor UnCalibrated':
21 [
22 {
23 sampleTime: '1450632410296',
24 data: '-0.05006743:-0.013848438:-0.0063915867
25 },
26 {
27 sampleTime: '1450632410296',
28 data: '-0.051132694:-0.0127831735:-0.003325345'
29 }
30 ]
31 }
There are a lot of great articles on how to manipulate objects in Javascript (whether using Node JS or a browser). I suggest here is a good place to start:
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_Objects
What's the common practice for enums in Python?
I've seen this pattern several times:
>>> class Enumeration(object):
def __init__(self, names): # or *names, with no .split()
for number, name in enumerate(names.split()):
setattr(self, name, number)
>>> foo = Enumeration("bar baz quux")
>>> foo.quux
2
You can also just use class members, though you'll have to supply your own numbering:
>>> class Foo(object):
bar = 0
baz = 1
quux = 2
>>> Foo.quux
2
If you're looking for something more robust (sparse values, enum-specific exception, etc.), try this recipe.
Change color of bootstrap navbar on hover link?
This is cleaner:
ul.nav a:hover { color: #fff !important; }
There's no need to get more specific than this. Unfortunately, the !important is necessary in this instance.
I also added :focus and :active to the same declaration for accessibility reasons and for smartphone/tablet/touchscreen users.
why $(window).load() is not working in jQuery?
I have to write a whole answer separately since it's hard to add a comment so long to the second answer.
I'm sorry to say this, but the second answer above doesn't work right.
The following three scenarios will show my point:
Scenario 1: Before the following way was deprecated,
$(window).load(function () {
alert("Window Loaded.");
});
if we execute the following two queries:
<script>
$(window).load(function () {
alert("Window Loaded.");
});
$(document).ready(function() {
alert("Dom Loaded.");
});
</script>,
the alert (Dom Loaded.) from the second query will show first, and the one (Window Loaded.) from the first query will show later, which is the way it should be.
Scenario 2: But if we execute the following two queries like the second answer above suggests:
<script>
$(window).ready(function () {
alert("Window Loaded.");
});
$(document).ready(function() {
alert("Dom Loaded.");
});
</script>,
the alert (Window Loaded.) from the first query will show first, and the one (Dom Loaded.) from the second query will show later, which is NOT right.
Scenario 3: On the other hand, if we execute the following two queries, we'll get the correct result:
<script>
$(window).on("load", function () {
alert("Window Loaded.");
});
$(document).ready(function() {
alert("Dom Loaded.");
});
</script>,
that is to say, the alert (Dom Loaded.) from the second query will show first, and the one (Window Loaded.) from the first query will show later, which is the RIGHT result.
In short, the FIRST answer is the CORRECT one:
$(window).on('load', function () {
alert("Window Loaded.");
});
Declaring variable workbook / Worksheet vba
Dim ws as Object
Set ws = Worksheets("name")
when declaring the worksheet as worksheet instead of an ojbect I had issues working with OptionButtons (Active X) in this worksheet (I guess the same will be with any Active-X element. When declared as object everything works fine.
Dropping Unique constraint from MySQL table
The constraint could be removed with syntax:
ALTER TABLE
As of MySQL 8.0.19, ALTER TABLE permits more general (and SQL standard) syntax for dropping and altering existing constraints of any type, where the constraint type is determined from the constraint name: ALTER TABLE tbl_name DROP CONSTRAINT symbol;
Example:
CREATE TABLE tab(id INT, CONSTRAINT unq_tab_id UNIQUE(id));
-- checking constraint name if autogenerated
SELECT * FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS WHERE TABLE_NAME = 'tab';
-- dropping constraint
ALTER TABLE tab DROP CONSTRAINT unq_tab_id;
db<>fiddle demo
How to create a bash script to check the SSH connection?
Just in case someone only wishes to check if port 22 is open on a remote machine, this simple netcat command is useful. I used it because nmap and telnet were not available for me. Moreover, my ssh configuration uses keyboard password auth.
It is a variant of the solution proposed by GUESSWHOz.
nc -q 0 -w 1 "${remote_ip}" 22 < /dev/null &> /dev/null && echo "Port is reachable" || echo "Port is unreachable"
Select entries between dates in doctrine 2
EDIT: See the other answers for better solutions
The original newbie approaches that I offered were (opt1):
$qb->where("e.fecha > '" . $monday->format('Y-m-d') . "'");
$qb->andWhere("e.fecha < '" . $sunday->format('Y-m-d') . "'");
And (opt2):
$qb->add('where', "e.fecha between '2012-01-01' and '2012-10-10'");
That was quick and easy and got the original poster going immediately.
Hence the accepted answer.
As per comments, it is the wrong answer, but it's an easy mistake to make, so I'm leaving it here as a "what not to do!"
How to select a radio button by default?
They pretty much got it there... just like a checkbox, all you have to do is add the attribute checked="checked" like so:
<input type="radio" checked="checked">
...and you got it.
Cheers!
Include CSS,javascript file in Yii Framework
If you are using Theme then you can the below Syntax
Yii::app()->theme->baseUrl
include CSS File :
<link href="<?php echo Yii::app()->theme->baseUrl;?>/css/bootstrap.css" type="text/css" rel="stylesheet" media="all">
Include JS File
<script src="<?php echo Yii::app()->theme->baseUrl;?>/js/jquery-2.2.3.min.js"></script>
If you are not using theme
Yii::app()->request->baseUrl
Use Like this
<link href="<?php echo Yii::app()->request->baseUrl; ?>/css/bootstrap.css" type="text/css" rel="stylesheet" media="all">
<script src="<?php echo Yii::app()->request->baseUrl; ?>/js/jquery-2.2.3.min.js"></script>
no module named zlib
Sounds like you need to install the devel package for zlib, probably want to do something like sudo apt-get install zlib1g-dev (I don't use ubuntu so you'll want to double-check the package). Instead of using python-brew you might want to consider just compiling by hand, it's not very hard. Just download the source, and configure, make, make install. You'll want to at least set --prefix to somewhere, so it'll get installed where you want.
./configure --prefix=/opt/python2.7 + other options
make
make install
You can check what configuration options are available with ./configure --help and see what your system python was compiled with by doing:
python -c "import sysconfig; print sysconfig.get_config_var('CONFIG_ARGS')"
The key is to make sure you have the development packages installed for your system, so that Python will be able to build the zlib, sqlite3, etc modules. The python docs cover the build process in more detail: http://docs.python.org/using/unix.html#building-python.
how to make a countdown timer in java
import java.util.Scanner;
import java.util.Timer;
import java.util.TimerTask;
public class Stopwatch {
static int interval;
static Timer timer;
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("Input seconds => : ");
String secs = sc.nextLine();
int delay = 1000;
int period = 1000;
timer = new Timer();
interval = Integer.parseInt(secs);
System.out.println(secs);
timer.scheduleAtFixedRate(new TimerTask() {
public void run() {
System.out.println(setInterval());
}
}, delay, period);
}
private static final int setInterval() {
if (interval == 1)
timer.cancel();
return --interval;
}
}
Try this.
Dynamic SQL results into temp table in SQL Stored procedure
create a global temp table with a GUID in the name dynamically. Then you can work with it in your code, via dyn sql, without worry that another process calling same sproc will use it. This is useful when you dont know what to expect from the underlying selected table each time it runs so you cannot created a temp table explicitly beforehand. ie - you need to use SELECT * INTO syntax
DECLARE @TmpGlobalTable varchar(255) = 'SomeText_' + convert(varchar(36),NEWID())
-- select @TmpGlobalTable
-- build query
SET @Sql =
'SELECT * INTO [##' + @TmpGlobalTable + '] FROM SomeTable'
EXEC (@Sql)
EXEC ('SELECT * FROM [##' + @TmpGlobalTable + '] ')
EXEC ('DROP TABLE [##' + @TmpGlobalTable + ']')
PRINT 'Dropped Table ' + @TmpGlobalTable
How to convert List to Json in Java
You need an external library for this.
JSONArray jsonA = JSONArray.fromObject(mybeanList);
System.out.println(jsonA);
Google GSON is one of such libraries
You can also take a look here for examples on converting Java object collection to JSON string.
How do I instantiate a JAXBElement<String> object?
ObjectFactory fact = new ObjectFactory();
JAXBElement<String> str = fact.createCompositeTypeStringValue("vik");
comp.setStringValue(str);
CompositeType retcomp = service.getDataUsingDataContract(comp);
System.out.println(retcomp.getStringValue().getValue());
JavaScript checking for null vs. undefined and difference between == and ===
If your (logical) check is for a negation (!) and you want to capture both JS null and undefined (as different Browsers will give you different results) you would use the less restrictive comparison:
e.g.:
var ItemID = Item.get_id();
if (ItemID != null)
{
//do stuff
}
This will capture both null and undefined
Waiting until the task finishes
Swift 4
You can use Async Function for these situations. When you use DispatchGroup(),Sometimes deadlock may be occures.
var a: Int?
@objc func myFunction(completion:@escaping (Bool) -> () ) {
DispatchQueue.main.async {
let b: Int = 3
a = b
completion(true)
}
}
override func viewDidLoad() {
super.viewDidLoad()
myFunction { (status) in
if status {
print(self.a!)
}
}
}
What does $ mean before a string?
Note that you can also combine the two, which is pretty cool (although it looks a bit odd):
// simple interpolated verbatim string
WriteLine($@"Path ""C:\Windows\{file}"" not found.");
momentJS date string add 5 days
UPDATED: January 19, 2016
As of moment 2.8.4 - use .add(5, 'd') (or .add(5, 'days')) instead of .add('d', 5)
var new_date = moment(startdate, "DD-MM-YYYY").add(5, 'days');
Thanks @Bala for the information.
UPDATED: March 21, 2014
This is what you'd have to do to get that format.
Here's an updated fiddle
startdate = "20.03.2014";
var new_date = moment(startdate, "DD-MM-YYYY").add('days', 5);
var day = new_date.format('DD');
var month = new_date.format('MM');
var year = new_date.format('YYYY');
alert(day + '.' + month + '.' + year);
ORIGINAL: March 20, 2014
You're not telling it how/what unit to add. Use -
var new_date = moment(startdate, "DD-MM-YYYY").add('days', 5);
Java ArrayList of Doubles
You are encountering a problem because you cannot construct the ArrayList and populate it at the same time. You either need to create it and then manually populate it as such:
ArrayList list = new ArrayList<Double>();
list.add(1.38);
...
Or, alternatively if it is more convenient for you, you can populate the ArrayList from a primitive array containing your values. For example:
Double[] array = {1.38, 2.56, 4.3};
ArrayList<Double> list = new ArrayList<Double>(Arrays.asList(array));
Find the directory part (minus the filename) of a full path in access 97
If you're just needing the path of the MDB currently open in the Access UI, I'd suggest writing a function that parses CurrentDB.Name and then stores the result in a Static variable inside the function. Something like this:
Public Function CurrentPath() As String
Dim strCurrentDBName As String
Static strPath As String
Dim i As Integer
If Len(strPath) = 0 Then
strCurrentDBName = CurrentDb.Name
For i = Len(strCurrentDBName) To 1 Step -1
If Mid(strCurrentDBName, i, 1) = "\" Then
strPath = Left(strCurrentDBName, i)
Exit For
End If
Next
End If
CurrentPath = strPath
End Function
This has the advantage that it only loops through the name one time.
Of course, it only works with the file that's open in the user interface.
Another way to write this would be to use the functions provided at the link inside the function above, thus:
Public Function CurrentPath() As String
Static strPath As String
If Len(strPath) = 0 Then
strPath = FolderFromPath(CurrentDB.Name)
End If
CurrentPath = strPath
End Function
This makes retrieving the current path very efficient while utilizing code that can be used for finding the path for any filename/path.
PHP: If internet explorer 6, 7, 8 , or 9
You can check the HTTP_USER_AGENT server variable. The user agent transfered by IE contains MSIE
if(strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== false) { ... }
For specific versions you can extend your condition
if(strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE 6.') !== false) { ... }
Also see this related question.
how to read certain columns from Excel using Pandas - Python
"usecols" should help, use range of columns (as per excel worksheet, A,B...etc.)
below are the examples
- Selected Columns
df = pd.read_excel(file_location,sheet_name='Sheet1', usecols="A,C,F")
- Range of Columns and selected column
df = pd.read_excel(file_location,sheet_name='Sheet1', usecols="A:F,H")
- Multiple Ranges
df = pd.read_excel(file_location,sheet_name='Sheet1', usecols="A:F,H,J:N")
- Range of columns
df = pd.read_excel(file_location,sheet_name='Sheet1', usecols="A:N")
How to get active user's UserDetails
You can try this:
By Using Authentication Object from Spring we can get User details from it in the controller method . Below is the example , by passing Authentication object in the controller method along with argument.Once user is authenticated the details are populated in the Authentication Object.
@GetMapping(value = "/mappingEndPoint") <ReturnType> methodName(Authentication auth) {
String userName = auth.getName();
return <ReturnType>;
}
Stop fixed position at footer
I ran into this same issue recently, posted the my solution also here:
Preventing element from displaying on top of footer when using position:fixed
You can achieve a solution leveraging the position property of the element with jQuery, switching between the default value (static for divs), fixed and absolute.
You will also need a container element for your fixed element. Finally, in order to prevent the fixed element to go over the footer, this container element can't be the parent of the footer.
The javascript part involves calculating the distance in pixels between your fixed element and the top of the document, and comparing it with the current vertical position of the scrollbar relatively to the window object (i.e. the number of pixels above that are hidden from the visible area of the page) every time the user scrolls the page.
When, on scrolling down, the fixed element is about to disappear above, we change its position to fixed and stick on top of the page.
This causes the fixed element to go over the footer when we scroll to the bottom, especially if the browser window is small.
Therefore, we will calculate the distance in pixels of the footer from the top of the document and compare it with the height of the fixed element plus the vertical position of the scrollbar: when the fixed element is about to go over the footer, we will change its position to absolute and stick at the bottom, just over the footer.
Here's a generic example.
The HTML structure:
<div id="content">
<div id="leftcolumn">
<div class="fixed-element">
This is fixed
</div>
</div>
<div id="rightcolumn">Main content here</div>
<div id="footer"> The footer </div>
</div>
The CSS:
#leftcolumn {
position: relative;
}
.fixed-element {
width: 180px;
}
.fixed-element.fixed {
position: fixed;
top: 20px;
}
.fixed-element.bottom {
position: absolute;
bottom: 356px; /* Height of the footer element, plus some extra pixels if needed */
}
The JS:
// Position of fixed element from top of the document
var fixedElementOffset = $('.fixed-element').offset().top;
// Position of footer element from top of the document.
// You can add extra distance from the bottom if needed,
// must match with the bottom property in CSS
var footerOffset = $('#footer').offset().top - 36;
var fixedElementHeight = $('.fixed-element').height();
// Check every time the user scrolls
$(window).scroll(function (event) {
// Y position of the vertical scrollbar
var y = $(this).scrollTop();
if ( y >= fixedElementOffset && ( y + fixedElementHeight ) < footerOffset ) {
$('.fixed-element').addClass('fixed');
$('.fixed-element').removeClass('bottom');
}
else if ( y >= fixedElementOffset && ( y + fixedElementHeight ) >= footerOffset ) {
$('.fixed-element').removeClass('fixed');
$('.fixed-element').addClass('bottom');
}
else {
$('.fixed-element').removeClass('fixed bottom');
}
});
MySql Proccesslist filled with "Sleep" Entries leading to "Too many Connections"?
Increasing number of max-connections will not solve the problem.
We were experiencing the same situation on our servers. This is what happens
User open a page/view, that connect to the database, query the database, still query(queries) were not finished and user leave the page or move to some other page.
So the connection that was open, will remains open, and keep increasing number of connections, if there are more users connecting with the db and doing something similar.
You can set interactive_timeout MySQL, bydefault it is 28800 (8hours) to 1 hour
SET interactive_timeout=3600
