I would suggest not to use seaborn pointplot
for plotting. This makes things unnecessarily complicated.
Instead use matplotlib plot_date
. This allows to set labels to the plots and have them automatically put into a legend with ax.legend()
.
import matplotlib.pyplot as plt
import pandas as pd
import seaborn as sns
import numpy as np
date = pd.date_range("2017-03", freq="M", periods=15)
count = np.random.rand(15,4)
df1 = pd.DataFrame({"date":date, "count" : count[:,0]})
df2 = pd.DataFrame({"date":date, "count" : count[:,1]+0.7})
df3 = pd.DataFrame({"date":date, "count" : count[:,2]+2})
f, ax = plt.subplots(1, 1)
x_col='date'
y_col = 'count'
ax.plot_date(df1.date, df1["count"], color="blue", label="A", linestyle="-")
ax.plot_date(df2.date, df2["count"], color="red", label="B", linestyle="-")
ax.plot_date(df3.date, df3["count"], color="green", label="C", linestyle="-")
ax.legend()
plt.gcf().autofmt_xdate()
plt.show()
sns.pointplot(ax=ax,x=x_col,y=y_col,data=df1,color='blue')
sns.pointplot(ax=ax,x=x_col,y=y_col,data=df2,color='green')
sns.pointplot(ax=ax,x=x_col,y=y_col,data=df3,color='red')
ax.legend(handles=ax.lines[::len(df1)+1], labels=["A","B","C"])
ax.set_xticklabels([t.get_text().split("T")[0] for t in ax.get_xticklabels()])
plt.gcf().autofmt_xdate()
plt.show()
Here's a list of things that are worth checking:
Is Suhosin installed?
ini_set
ini_set('memory_limit', '512'); // DIDN'T WORK
ini_set('memory_limit', '512MB'); // DIDN'T WORK
ini_set('memory_limit', '512M'); // OK - 512MB
ini_set('memory_limit', 512000000); // OK - 512MB
When an integer is used, the value is measured in bytes. Shorthand notation, as described in this FAQ, may also be used.
http://php.net/manual/en/ini.core.php#ini.memory-limit
Sets the value of the specified directive. This can not be used in .htaccess files. Any directive type set with php_admin_value can not be overridden by .htaccess or ini_set(). To clear a previously set value use none as the value.
You already got the right answer, but if you dislike the UIColor
interface like me, you can do this:
#import "UIColor+Helper.h"
// ...
myLabel.textColor = [UIColor colorWithRGBA:0xA06105FF];
UIColor+Helper.h:
#import <UIKit/UIKit.h>
@interface UIColor (Helper)
+ (UIColor *)colorWithRGBA:(NSUInteger)color;
@end
UIColor+Helper.m:
#import "UIColor+Helper.h"
@implementation UIColor (Helper)
+ (UIColor *)colorWithRGBA:(NSUInteger)color
{
return [UIColor colorWithRed:((color >> 24) & 0xFF) / 255.0f
green:((color >> 16) & 0xFF) / 255.0f
blue:((color >> 8) & 0xFF) / 255.0f
alpha:((color) & 0xFF) / 255.0f];
}
@end
Truncate the contents of a variable
$ var="abcde"; echo ${var%d*}
abc
Make substitutions similar to sed
$ var="abcde"; echo ${var/de/12}
abc12
Use a default value
$ default="hello"; unset var; echo ${var:-$default}
hello
I think the best way to achieve this scenario using css position. set position relative to your parent div and position:absolute to your iframe.
.container{_x000D_
width:100%;_x000D_
position:relative;_x000D_
height:500px;_x000D_
}_x000D_
_x000D_
iframe{_x000D_
position:absolute;_x000D_
width:100%;_x000D_
height:100%;_x000D_
}
_x000D_
<div class="container">_x000D_
<iframe src="http://www.w3schools.com">_x000D_
<p>Your browser does not support iframes.</p>_x000D_
</iframe>_x000D_
</div>
_x000D_
for other padding and margin issue now a days css3 calc() is very advanced and mostly compatible to all browser as well.
check calc()
FYI, this fixed the problem for me... it's a pathing problem: http://forums.freebsd.org/showthread.php?t=35539
This is to synchronize IOs from C and C++ world. If you synchronize, then you have a guaranty that the orders of all IOs is exactly what you expect. In general, the problem is the buffering of IOs that causes the problem, synchronizing let both worlds to share the same buffers. For example cout << "Hello"; printf("World"); cout << "Ciao";
; without synchronization you'll never know if you'll get HelloCiaoWorld
or HelloWorldCiao
or WorldHelloCiao
...
tie
lets you have the guaranty that IOs channels in C++ world are tied one to each other, which means for example that every output have been flushed before inputs occurs (think about cout << "What's your name ?"; cin >> name;
).
You can always mix C or C++ IOs, but if you want some reasonable behavior you must synchronize both worlds. Beware that in general it is not recommended to mix them, if you program in C use C stdio, and if you program in C++ use streams. But you may want to mix existing C libraries into C++ code, and in such a case it is needed to synchronize both.
Simple use text = text + string2
In general, if you want to extrapolate object values which are inside an array (like described in the question) then you could use reduce, map and array destructuring.
ES6
let a = [{ z: 'word', c: 'again', d: 'some' }, { u: '1', r: '2', i: '3' }];
let b = a.reduce((acc, obj) => [...acc, Object.values(obj).map(y => y)], []);
console.log(b)
The equivalent using for in loop would be:
for (let i in a) {
let temp = [];
for (let j in a[i]) {
temp.push(a[i][j]);
}
array.push(temp);
}
Produced output: ["word", "again", "some", "1", "2", "3"]
On C++17 you can by this way :
#include <filesystem>
#include <iostream>
#include <vector>
namespace fs = std::filesystem;
int main()
{
std::ios_base::sync_with_stdio(false);
for (const auto &entry : fs::recursive_directory_iterator(".")) {
if (entry.path().extension() == ".png") {
std::cout << entry.path().string() << std::endl;
}
}
return 0;
}
There is no need to use angular http, you can get with js native functions
// you will ned this function to fetch the image blob._x000D_
async function getImage(url, fileName) {_x000D_
// on the first then you will return blob from response_x000D_
return await fetch(url).then(r => r.blob())_x000D_
.then((blob) => { // on the second, you just create a file from that blob, getting the type and name that intend to inform_x000D_
_x000D_
return new File([blob], fileName+'.'+ blob.type.split('/')[1]) ;_x000D_
});_x000D_
}_x000D_
_x000D_
// example url_x000D_
var url = 'https://img.freepik.com/vetores-gratis/icone-realista-quebrado-vidro-fosco_1284-12125.jpg';_x000D_
_x000D_
// calling the function_x000D_
getImage(url, 'your-name-image').then(function(file) {_x000D_
_x000D_
// with file reader you will transform the file in a data url file;_x000D_
var reader = new FileReader();_x000D_
reader.readAsDataURL(file);_x000D_
reader.onloadend = () => {_x000D_
_x000D_
// just putting the data url to img element_x000D_
document.querySelector('#image').src = reader.result ;_x000D_
}_x000D_
})
_x000D_
<img src="" id="image"/>
_x000D_
In HTML:
<button type="button" id="AddButton" onclick="AddButtonClick()" class="btn btn-success btn-block ">Add</button>
In Jquery write this function:
function AddButtonClick(){
//change text from add to Update
$("#AddButton").text('Update');
}
Nice way to handle not found error in Django.
https://docs.djangoproject.com/en/3.1/topics/http/shortcuts/#get-object-or-404
from django.shortcuts import get_object_or_404
def get_data(request):
obj = get_object_or_404(Model, pk=1)
The dword ptr
part is called a size directive. This page explains them, but it wasn't possible to direct-link to the correct section.
Basically, it means "the size of the target operand is 32 bits", so this will bitwise-AND the 32-bit value at the address computed by taking the contents of the ebp
register and subtracting four with 0.
Ok - for me the source of the problem was in serialisation/deserialisation. The object that was being sent and received was as follows where the code is submitted and the code and maskedPhoneNumber is returned.
@ApiObject(description = "What the object is for.")
@JsonIgnoreProperties(ignoreUnknown = true)
public class CodeVerification {
@ApiObjectField(description = "The code which is to be verified.")
@NotBlank(message = "mandatory")
private final String code;
@ApiObjectField(description = "The masked mobile phone number to which the code was verfied against.")
private final String maskedMobileNumber;
public codeVerification(@JsonProperty("code") String code, String maskedMobileNumber) {
this.code = code;
this.maskedMobileNumber = maskedMobileNumber;
}
public String getcode() {
return code;
}
public String getMaskedMobileNumber() {
return maskedMobileNumber;
}
}
The problem was that I didn't have a JsonProperty defined for the maskedMobileNumber in the constructor. i.e. Constructor should have been
public codeVerification(@JsonProperty("code") String code, @JsonProperty("maskedMobileNumber") String maskedMobileNumber) {
this.code = code;
this.maskedMobileNumber = maskedMobileNumber;
}
UPDATE mytbl
SET a = ABS(a)
where a < 0
In order to embed your channel, all you need to do is copy then paste the following code in another web-page.
<script src="http://www.gmodules.com/ig/ifr?url=http://www.google.com/ig/modules/youtube.xml&up_channel=YourChannelName&synd=open&w=320&h=390&title=&border=%23ffffff%7C3px%2C1px+solid+%23999999&output=js"></script>
Make sure to replace the YourChannelName with your actual channel name.
For example: if your channel name were CaliChick94066 your channel embed code would be:
<script src="http://www.gmodules.com/ig/ifr?url=http://www.google.com/ig/modules/youtube.xml&up_channel=CaliChick94066&synd=open&w=320&h=390&title=&border=%23ffffff%7C3px%2C1px+solid+%23999999&output=js"></script>
Please look at the following links:
You just have to name the URL to your channel name. Also you can play with the height and the border color and size. Hope it helps
I've heard about some projects that directly compile IL into native code. You can get some additional info from this post: Is it possible to compile .NET IL code to machine code?
Open cmd type adb shell
then press enter.
Type ls
to view files list.
Seems like the general query log is the file that you need. A good introduction to this is at http://dev.mysql.com/doc/refman/5.1/en/query-log.html
You can use nunique
in pandas:
df.hID.nunique()
# 5
The best option I've seen is the following extension method:
public static Task ForEachAsync<T>(this IEnumerable<T> sequence, Func<T, Task> action) {
return Task.WhenAll(sequence.Select(action));
}
Call it like this:
await sequence.ForEachAsync(item => item.SomethingAsync(blah));
Or with an async lambda:
await sequence.ForEachAsync(async item => {
var more = await GetMoreAsync(item);
await more.FrobbleAsync();
});
Angular 2 Deployment in Github Pages
Testing Deployment of Angular2 Webpack in ghpages
First get all the relevant files from the dist
folder of your application, for me it was the :
+ css files in the assets folder
+ main.bundle.js
+ polyfills.bundle.js
+ vendor.bundle.js
Then push this files in the repo which you have created.
1 -- If you want the application to run on the root directory - create a special repo with the name [yourgithubusername].github.io and push these files in the master branch
2 -- Where as if you want to create these page in the sub directory or in a different branch other than than the root, create a branch gh-pages and push these files in that branch.
In both the cases the way we access these deployed pages will be different.
For the First case it will be https://[yourgithubusername].github.io and for the second case it will be [yourgithubusername].github.io/[Repo name].
If suppose you want to deploy it using the second case make sure to change the base url of the index.html file in the dist as all the route mappings depend on the path you give and it should be set to [/branchname].
Link to this page
https://rahulrsingh09.github.io/Deployment
Git Repo
I usually just leave my PK named id, and then concatenate my table name and key column name when naming FKs in other tables. I never bother with camel-casing, because some databases discard case-sensitivity and simply return all upper or lower case names anyway. In any case, here's what my version of your tables would look like:
task (id, userid, title);
note (id, taskid, userid, note);
user (id, name);
Note that I also name my tables in the singular, because a row represents one of the objects I'm persisting. Many of these conventions are personal preference. I'd suggest that it's more important to choose a convention and always use it, than it is to adopt someone else's convention.
For multi-selects:
$("#yourdropdownid :selected").map(function(i, v) { return $.trim($(v).text()); }
ORA-03113: end-of-file on communication channel
Is the database letting you know that the network connection is no more. This could be because:
For 1) (firewall) search tahiti.oracle.com for SQLNET.EXPIRE_TIME
. This is a sqlnet.ora parameter that will regularly send a network packet at a configurable interval ie: setting this will make the firewall believe that the connection is live.
For 1) (network) speak to your network admin (connection could be unreliable)
For 2) Check the alert.log
for errors. If the server process failed there will be an error message. Also a trace file will have been written to enable support to identify the issue. The error message will reference the trace file.
Support issues can be raised at metalink.oracle.com with a suitable Customer Service Identifier (CSI)
you have to include two more jar files.
xmlbeans-2.3.0.jar and dom4j-1.6.1.jar Add try it will work.
Note: It is required for the files with .xlsx formats only, not for just .xlt formats.
The model should have nullable datetime. The earlier suggested method of retrieving the object that has to be modified should be used instead of the ApplyPropertyChanges. In my case I had this method to Save my object:
public ActionResult Save(QCFeedbackViewModel item)
And then in service, I retrieve using:
RETURNED = item.RETURNED.HasValue ? Convert.ToDateTime(item.RETURNED) : (DateTime?)null
The full code of service is as below:
var add = new QC_LOG_FEEDBACK()
{
QCLOG_ID = item.QCLOG_ID,
PRE_QC_FEEDBACK = item.PRE_QC_FEEDBACK,
RETURNED = item.RETURNED.HasValue ? Convert.ToDateTime(item.RETURNED) : (DateTime?)null,
PRE_QC_RETURN = item.PRE_QC_RETURN.HasValue ? Convert.ToDateTime(item.PRE_QC_RETURN) : (DateTime?)null,
FEEDBACK_APPROVED = item.FEEDBACK_APPROVED,
QC_COMMENTS = item.QC_COMMENTS,
FEEDBACK = item.FEEDBACK
};
_context.QC_LOG_FEEDBACK.Add(add);
_context.SaveChanges();
Using awk.
i starts at 0, i++
will increment the value of i, but return the original value that i held before being incremented.
awk '{print i++ "," $0}' file
#Case 1: download file with small size.
#Case 2: download file with large size.
Finally I found solution for two above cases. Just need to put httpConnection.setDoOutput(true)
in connection step to get a Json.
)]}' { "disposition":"SCAN_CLEAN",
"downloadUrl":"http:www...",
"fileName":"exam_list_json.txt", "scanResult":"OK", "sizeBytes":2392}
Then, you can use any Json parser to read downloadUrl, fileName and sizeBytes.
You can refer follow snippet, hope it help.
private InputStream gConnect(String remoteFile) throws IOException{
URL url = new URL(remoteFile);
URLConnection connection = url.openConnection();
if(connection instanceof HttpURLConnection){
HttpURLConnection httpConnection = (HttpURLConnection) connection;
connection.setAllowUserInteraction(false);
httpConnection.setInstanceFollowRedirects(true);
httpConnection.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows 2000)");
httpConnection.setDoOutput(true);
httpConnection.setRequestMethod("GET");
httpConnection.connect();
int reqCode = httpConnection.getResponseCode();
if(reqCode == HttpURLConnection.HTTP_OK){
InputStream is = httpConnection.getInputStream();
Map<String, List<String>> map = httpConnection.getHeaderFields();
List<String> values = map.get("content-type");
if(values != null && !values.isEmpty()){
String type = values.get(0);
if(type.contains("text/html")){
String cookie = httpConnection.getHeaderField("Set-Cookie");
String temp = Constants.getPath(mContext, Constants.PATH_TEMP) + "/temp.html";
if(saveGHtmlFile(is, temp)){
String href = getRealUrl(temp);
if(href != null){
return parseUrl(href, cookie);
}
}
} else if(type.contains("application/json")){
String temp = Constants.getPath(mContext, Constants.PATH_TEMP) + "/temp.txt";
if(saveGJsonFile(is, temp)){
FileDataSet data = JsonReaderHelper.readFileDataset(new File(temp));
if(data.getPath() != null){
return parseUrl(data.getPath());
}
}
}
}
return is;
}
}
return null;
}
And
public static FileDataSet readFileDataset(File file) throws IOException{
FileInputStream is = new FileInputStream(file);
JsonReader reader = new JsonReader(new InputStreamReader(is, "UTF-8"));
reader.beginObject();
FileDataSet rs = new FileDataSet();
while(reader.hasNext()){
String name = reader.nextName();
if(name.equals("downloadUrl")){
rs.setPath(reader.nextString());
} else if(name.equals("fileName")){
rs.setName(reader.nextString());
} else if(name.equals("sizeBytes")){
rs.setSize(reader.nextLong());
} else {
reader.skipValue();
}
}
reader.endObject();
return rs;
}
Had the same error: java.lang.RuntimeException: Unable to instantiate activity (classnotfound) FIRST try to change the build platform (2.3.3 -> 2.2 -> 2.3.3) worked for me.
You can use $parent
to refer to the model defined in the parent scope like this
<input type="checkbox" ng-model="$parent.testb" />
To get a Buffered Image with ImageIO.read is a very heavy method, as it's creating a complete uncompressed copy of the image in memory. For png's you may also use pngj and the code:
if (png)
PngReader pngr = new PngReader(file);
width = pngr.imgInfo.cols;
height = pngr.imgInfo.rows;
pngr.close();
}
It should be document.getElementById("txtresult").value= result;
You are setting the value of the textbox to the result. The id="txtresult"
is not an HTML element.
A slightly different implementation,
Two div panels(content+extra), side by side, content panel
expands if extra panel
is not present.
jsfiddle: http://jsfiddle.net/qLTMf/1722/
I'd like explain the different alter table syntaxes - See the MySQL documentation
For adding/removing defaults on a column:
ALTER TABLE table_name
ALTER COLUMN col_name {SET DEFAULT literal | DROP DEFAULT}
For renaming a column, changing it's data type and optionally changing the column order:
ALTER TABLE table_name
CHANGE [COLUMN] old_col_name new_col_name column_definition
[FIRST|AFTER col_name]
For changing a column's data type and optionally changing the column order:
ALTER TABLE table_name
MODIFY [COLUMN] col_name column_definition
[FIRST | AFTER col_name]
There is an important difference between the two.
Everything not allocated with new
behaves much like value types in C# (and people often say that those objects are allocated on the stack, which is probably the most common/obvious case, but not always true. More precisely, objects allocated without using new
have automatic storage duration
Everything allocated with new
is allocated on the heap, and a pointer to it is returned, exactly like reference types in C#.
Anything allocated on the stack has to have a constant size, determined at compile-time (the compiler has to set the stack pointer correctly, or if the object is a member of another class, it has to adjust the size of that other class). That's why arrays in C# are reference types. They have to be, because with reference types, we can decide at runtime how much memory to ask for. And the same applies here. Only arrays with constant size (a size that can be determined at compile-time) can be allocated with automatic storage duration (on the stack). Dynamically sized arrays have to be allocated on the heap, by calling new
.
(And that's where any similarity to C# stops)
Now, anything allocated on the stack has "automatic" storage duration (you can actually declare a variable as auto
, but this is the default if no other storage type is specified so the keyword isn't really used in practice, but this is where it comes from)
Automatic storage duration means exactly what it sounds like, the duration of the variable is handled automatically. By contrast, anything allocated on the heap has to be manually deleted by you. Here's an example:
void foo() {
bar b;
bar* b2 = new bar();
}
This function creates three values worth considering:
On line 1, it declares a variable b
of type bar
on the stack (automatic duration).
On line 2, it declares a bar
pointer b2
on the stack (automatic duration), and calls new, allocating a bar
object on the heap. (dynamic duration)
When the function returns, the following will happen:
First, b2
goes out of scope (order of destruction is always opposite of order of construction). But b2
is just a pointer, so nothing happens, the memory it occupies is simply freed. And importantly, the memory it points to (the bar
instance on the heap) is NOT touched. Only the pointer is freed, because only the pointer had automatic duration.
Second, b
goes out of scope, so since it has automatic duration, its destructor is called, and the memory is freed.
And the bar
instance on the heap? It's probably still there. No one bothered to delete it, so we've leaked memory.
From this example, we can see that anything with automatic duration is guaranteed to have its destructor called when it goes out of scope. That's useful. But anything allocated on the heap lasts as long as we need it to, and can be dynamically sized, as in the case of arrays. That is also useful. We can use that to manage our memory allocations. What if the Foo class allocated some memory on the heap in its constructor, and deleted that memory in its destructor. Then we could get the best of both worlds, safe memory allocations that are guaranteed to be freed again, but without the limitations of forcing everything to be on the stack.
And that is pretty much exactly how most C++ code works.
Look at the standard library's std::vector
for example. That is typically allocated on the stack, but can be dynamically sized and resized. And it does this by internally allocating memory on the heap as necessary. The user of the class never sees this, so there's no chance of leaking memory, or forgetting to clean up what you allocated.
This principle is called RAII (Resource Acquisition is Initialization), and it can be extended to any resource that must be acquired and released. (network sockets, files, database connections, synchronization locks). All of them can be acquired in the constructor, and released in the destructor, so you're guaranteed that all resources you acquire will get freed again.
As a general rule, never use new/delete directly from your high level code. Always wrap it in a class that can manage the memory for you, and which will ensure it gets freed again. (Yes, there may be exceptions to this rule. In particular, smart pointers require you to call new
directly, and pass the pointer to its constructor, which then takes over and ensures delete
is called correctly. But this is still a very important rule of thumb)
The differences are
String class is overriding toString(), equals(), hashCode() of Object class, but StringBuffer only overrides toString().
String s1 = new String("abc");
String s2 = new String("abc");
System.out.println(s1.equals(s2)); // output true
StringBuffer sb1 = new StringBuffer("abc");
StringBuffer sb2 = new StringBuffer("abc");
System.out.println(sb1.equals(sb2)); // output false
String class is both Serializable as well as Comparable, but StringBuffer is only Serializable.
Set<StringBuffer> set = new TreeSet<StringBuffer>();
set.add(sb1);
set.add(sb2);
System.out.println(set); // gives ClassCastException because there is no Comparison mechanism
We can create a String object with and without new operator, but StringBuffer object can only be created using new operator.
To follow up on the previous answer using mail :
Often times one's html output is interpreted by the client mailer, which may not format things using a fixed-width font. Thus your nicely formatted ascii alignment gets all messed up. To send old-fashioned fixed-width the way the God intended, try this:
{ echo -e "<pre>"
echo "Descriptive text here."
shell_command_1_here
another_shell_command
cat <<EOF
This is the ending text.
</pre><br>
</div>
EOF
} | mail -s "$(echo -e 'Your subject.\nContent-Type: text/html')" [email protected]
You don't necessarily need the "Descriptive text here." line, but I have found that sometimes the first line may, depending on its contents, cause the mail program to interpret the rest of the file in ways you did not intend. Try the script with simple descriptive text first, before fine tuning the output in the way that you want.
Angular 2-4 route reload hack
For me, using this method inside a root component (component, which is present on any route) works:
onRefresh() {
this.router.routeReuseStrategy.shouldReuseRoute = function(){return false;};
let currentUrl = this.router.url + '?';
this.router.navigateByUrl(currentUrl)
.then(() => {
this.router.navigated = false;
this.router.navigate([this.router.url]);
});
}
You can use a For Each to iterate through all the cells in a defined range.
Public Sub IterateThroughRange()
Dim wb As Workbook
Dim ws As Worksheet
Dim rng As Range
Dim cell As Range
Set wb = Application.Workbooks(1)
Set ws = wb.Sheets(1)
Set rng = ws.Range("A1", "C3")
For Each cell In rng.Cells
cell.Value = cell.Address
Next cell
End Sub
namespace TestApplication // Remove .Controller
{
public class HomeController : Controller
{
public ActionResult Index()
{
return View();
}
}
}
Remove the controller word from namepsace
Convert from any classic base to any base in C#
String number = "100";
int fromBase = 16;
int toBase = 10;
String result = Convert.ToString(Convert.ToInt32(number, fromBase), toBase);
// result == "256"
Supported bases are 2, 8, 10 and 16
Try this server control which inherits directly from CheckBoxList (free, open source): http://dropdowncheckboxes.codeplex.com/
If you have a form as such:
<form id="myform">
...
</form>
You can use the following jQuery code to do something before the form is submitted:
$('#myform').submit(function() {
// DO STUFF...
return true; // return false to cancel form action
});
As of Angular Material v9, it now has a clipboard CDK
It can be used as simply as
<button [cdkCopyToClipboard]="This goes to Clipboard">Copy this</button>
A static method means that it can be accessed without creating an object of the class, unlike public:
public class MyClass {
// Static method
static void myStaticMethod() {
System.out.println("Static methods can be called without creating objects");
}
// Public method
public void myPublicMethod() {
System.out.println("Public methods must be called by creating objects");
}
// Main method
public static void main(String[ ] args) {
myStaticMethod(); // Call the static method
// myPublicMethod(); This would output an error
MyClass myObj = new MyClass(); // Create an object of MyClass
myObj.myPublicMethod(); // Call the public method
}
}
You can apply a theme to any activity by including android:theme
inside <activity>
inside manifest file.
For example:
<activity android:theme="@android:style/Theme.Dialog">
<activity android:theme="@style/CustomTheme">
And if you want to set theme programatically then use setTheme()
before calling setContentView()
and super.onCreate()
method inside onCreate()
method.
If you are an admin and if you want to see the Gitlab version (and more you didn't know about) click on the wrench/admin menu icon and under Components you can see a lot , especially if you are using Omnibus.
As of Java 8, some local variable name information is available through reflection. See the "Update" section below.
Complete information is often stored in class files. One compile-time optimization is to remove it, saving space (and providing some obsfuscation). However, when it is is present, each method has a local variable table attribute that lists the type and name of local variables, and the range of instructions where they are in scope.
Perhaps a byte-code engineering library like ASM would allow you to inspect this information at runtime. The only reasonable place I can think of for needing this information is in a development tool, and so byte-code engineering is likely to be useful for other purposes too.
Update: Limited support for this was added to Java 8. Parameter (a special class of local variable) names are now available via reflection. Among other purposes, this can help to replace @ParameterName
annotations used by dependency injection containers.
The problem with doing an svn merge as suggested by Sean Bright is that is reintroduces other changes made in the same revision as the deletion. An svn copy is a more targeted operation that will only affect the deleted files.
Using Tortoise SVN you can resurrect a file that has been deleted from your working copy directory and from later SVN revisions, via a svn copy as follows:
The deleted file will now be in the working copy folder. To re-add it back to SVN, right click on the restored file and select SVN Commit.
NB: This method will preserve the previous history of the restored file, however to see the prior history in the TortoiseSVN log you need to make sure "Stop on copy/rename" is unchecked in the Log messages dialog.
Biginteger
is an immutable class.
You need to explicitly assign value of your output to sum like this:
sum = sum.add(BigInteger.valueof(i));
After a lot of looking at ways to perform this I ended up using jq
, and hopefully I can expand it to handle other repos beyond Docker-Compose without too much work.
# If you have jq installed this will automatically find the latest release binary for your architecture and download it
curl --silent "https://api.github.com/repos/docker/compose/releases/latest" | jq --arg PLATFORM_ARCH "$(echo `uname -s`-`uname -m`)" -r '.assets[] | select(.name | endswith($PLATFORM_ARCH)).browser_download_url' | xargs sudo curl -L -o /usr/local/bin/docker-compose --url
Nouns.h
doesn't include <string>
, but it needs to. You need to add
#include <string>
at the top of that file, otherwise the compiler doesn't know what std::string
is when it is encountered for the first time.
$('#select_id option:eq(0)').prop('selected', 'selected');
its good
Press ESC to first go into command mode
. Then Press Shift+D.
TL;DR
Error #1064 means that MySQL can't understand your command. To fix it:
Read the error message. It tells you exactly where in your command MySQL got confused.
Examine your command. If you use a programming language to create your command, use
echo
,console.log()
, or its equivalent to show the entire command so you can see it.Check the manual. By comparing against what MySQL expected at that point, the problem is often obvious.
Check for reserved words. If the error occurred on an object identifier, check that it isn't a reserved word (and, if it is, ensure that it's properly quoted).
Error messages may look like gobbledygook, but they're (often) incredibly informative and provide sufficient detail to pinpoint what went wrong. By understanding exactly what MySQL is telling you, you can arm yourself to fix any problem of this sort in the future.
As in many programs, MySQL errors are coded according to the type of problem that occurred. Error #1064 is a syntax error.
Whilst "syntax" is a word that many programmers only encounter in the context of computers, it is in fact borrowed from wider linguistics. It refers to sentence structure: i.e. the rules of grammar; or, in other words, the rules that define what constitutes a valid sentence within the language.
For example, the following English sentence contains a syntax error (because the indefinite article "a" must always precede a noun):
This sentence contains syntax error a.
Whenever one issues a command to a computer, one of the very first things that it must do is "parse" that command in order to make sense of it. A "syntax error" means that the parser is unable to understand what is being asked because it does not constitute a valid command within the language: in other words, the command violates the grammar of the programming language.
It's important to note that the computer must understand the command before it can do anything with it. Because there is a syntax error, MySQL has no idea what one is after and therefore gives up before it even looks at the database and therefore the schema or table contents are not relevant.
Obviously, one needs to determine how it is that the command violates MySQL's grammar. This may sound pretty impenetrable, but MySQL is trying really hard to help us here. All we need to do is…
MySQL not only tells us exactly where the parser encountered the syntax error, but also makes a suggestion for fixing it. For example, consider the following SQL command:
UPDATE my_table WHERE id=101 SET name='foo'
That command yields the following error message:
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'WHERE id=101 SET name='foo'' at line 1
MySQL is telling us that everything seemed fine up to the word WHERE
, but then a problem was encountered. In other words, it wasn't expecting to encounter WHERE
at that point.
Messages that say ...near '' at line...
simply mean that the end of command was encountered unexpectedly: that is, something else should appear before the command ends.
Programmers often create SQL commands using a programming language. For example a php program might have a (wrong) line like this:
$result = $mysqli->query("UPDATE " . $tablename ."SET name='foo' WHERE id=101");
If you write this this in two lines
$query = "UPDATE " . $tablename ."SET name='foo' WHERE id=101"
$result = $mysqli->query($query);
then you can add echo $query;
or var_dump($query)
to see that the query actually says
UPDATE userSET name='foo' WHERE id=101
Often you'll see your error immediately and be able to fix it.
MySQL is also recommending that we "check the manual that corresponds to our MySQL version for the right syntax to use". Let's do that.
I'm using MySQL v5.6, so I'll turn to that version's manual entry for an UPDATE
command. The very first thing on the page is the command's grammar (this is true for every command):
UPDATE [LOW_PRIORITY] [IGNORE] table_reference
SET col_name1={expr1|DEFAULT} [, col_name2={expr2|DEFAULT}] ...
[WHERE where_condition]
[ORDER BY ...]
[LIMIT row_count]
The manual explains how to interpret this syntax under Typographical and Syntax Conventions, but for our purposes it's enough to recognise that: clauses contained within square brackets [
and ]
are optional; vertical bars |
indicate alternatives; and ellipses ...
denote either an omission for brevity, or that the preceding clause may be repeated.
We already know that the parser believed everything in our command was okay prior to the WHERE
keyword, or in other words up to and including the table reference. Looking at the grammar, we see that table_reference
must be followed by the SET
keyword: whereas in our command it was actually followed by the WHERE
keyword. This explains why the parser reports that a problem was encountered at that point.
Of course, this was a simple example. However, by following the two steps outlined above (i.e. observing exactly where in the command the parser found the grammar to be violated and comparing against the manual's description of what was expected at that point), virtually every syntax error can be readily identified.
I say "virtually all", because there's a small class of problems that aren't quite so easy to spot—and that is where the parser believes that the language element encountered means one thing whereas you intend it to mean another. Take the following example:
UPDATE my_table SET where='foo'
Again, the parser does not expect to encounter WHERE
at this point and so will raise a similar syntax error—but you hadn't intended for that where
to be an SQL keyword: you had intended for it to identify a column for updating! However, as documented under Schema Object Names:
If an identifier contains special characters or is a reserved word, you must quote it whenever you refer to it. (Exception: A reserved word that follows a period in a qualified name must be an identifier, so it need not be quoted.) Reserved words are listed at Section 9.3, “Keywords and Reserved Words”.
[ deletia ]The identifier quote character is the backtick (“
`
”):mysql> SELECT * FROM `select` WHERE `select`.id > 100;
If the
ANSI_QUOTES
SQL mode is enabled, it is also permissible to quote identifiers within double quotation marks:mysql> CREATE TABLE "test" (col INT); ERROR 1064: You have an error in your SQL syntax... mysql> SET sql_mode='ANSI_QUOTES'; mysql> CREATE TABLE "test" (col INT); Query OK, 0 rows affected (0.00 sec)
I think you want to MODIFY
the column as described for the ALTER TABLE
command. It might be something like this:
ALTER TABLE users MODIFY id INTEGER NOT NULL AUTO_INCREMENT;
Before running above ensure that id
column has a Primary index.
I'd go with EXISTS over IN, see below link:
SQL Server: JOIN vs IN vs EXISTS - the logical difference
There is a common misconception that IN behaves equally to EXISTS or JOIN in terms of returned results. This is simply not true.
IN: Returns true if a specified value matches any value in a subquery or a list.
Exists: Returns true if a subquery contains any rows.
Join: Joins 2 resultsets on the joining column.
Blog credit: https://stackoverflow.com/users/31345/mladen-prajdic
I found that answers do not include a special case for Simulators.
#define IS_WIDESCREEN ( [ [ UIScreen mainScreen ] bounds ].size.height == 568 )
#define IS_IPHONE ([[ [ UIDevice currentDevice ] model ] rangeOfString:@"iPhone"].location != NSNotFound)
#define IS_IPAD ([[ [ UIDevice currentDevice ] model ] rangeOfString:@"iPad"].location != NSNotFound)
#define IS_IPHONE_5 ( IS_IPHONE && IS_WIDESCREEN )
Just to present an alternative way to fix this problem (if you don't really care about supporting IE):
A soft coded solution would be to use display: table
(no support in IE7) along with table-layout: fixed
(to ensure equal width columns).
Read more about this here.
You may be able to use an approximate string matching library to do this, e.g. SecondString, but that is almost certainly overkill - just use one of the for-loop answers provided instead.
i've found one solution:
$("#someElement")[0].className.match("test")
but somehow i believe that there's a better way!
The way I have done it is to have the actionLink and the image seperately. Set the actionlink image as hidden and then added a jQuery trigger call. This is more of a workaround.
'<%= Html.ActionLink("Button Name", "Index", null, new { @class="yourclassname" }) %>'
<img id="yourImage" src="myImage.jpg" />
Trigger example:
$("#yourImage").click(function () {
$('.yourclassname').trigger('click');
});
The encryption methods described are symmetric key block ciphers.
Data Encryption Standard (DES) is the predecessor, encrypting data in 64-bit blocks using a 56 bit key. Each block is encrypted in isolation, which is a security vulnerability.
Triple DES extends the key length of DES by applying three DES operations on each block: an encryption with key 0, a decryption with key 1 and an encryption with key 2. These keys may be related.
DES and 3DES are usually encountered when interfacing with legacy commercial products and services.
AES is considered the successor and modern standard. http://en.wikipedia.org/wiki/Advanced_Encryption_Standard
I believe the use of Blowfish is discouraged.
It is highly recommended that you do not attempt to implement your own cryptography and instead use a high-level implementation such as GPG for data at rest or SSL/TLS for data in transit. Here is an excellent and sobering video on encryption vulnerabilities http://rdist.root.org/2009/08/06/google-tech-talk-on-common-crypto-flaws/
For Mac users who only have Command Line Tools instead of Xcode, check the /Library/Developer/CommandLineTools
directory, for example::
"configurations": [{
"name": "Mac",
"includePath": [
"/usr/local/include",
// others, e.g.: "/usr/local/opt/ncurses/include",
"/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include",
"${workspaceFolder}/**"
]
}]
You probably need to adjust the path if you have different version of Command Line Tools installed.
Note: You can also open/generate the
c_cpp_properties.json
file via theC/Cpp: Edit Configurations
command from the Command Palette (??P).
I did the following:
<Create a backup of the entire folder>
Rename the project from within Visual Studio 2013 (optional/not needed).
Export the project as a template.
Close the solution.
Reopen the solution
Create a project from the saved template and use the name you like.
Delete from the solution explorer the previous project.
At this point I tried to compile the new solution, and to do so, I had to manually copy some resources and headers to the new project folder from the old project folder. Do this until it compiles without errors. Now this new project saved the ".exe" file to the previous folder.*
So ->
Go to Windows Explorer and manually copy the solution file from the old project folder to the new project folder.
Close the solution, and open the solution from within the new project.
Changed the configuration back to (x64) if needed.
Delete the folder of the project with the old name from the folder of the solution.
If you save the excel file as a CSV file then you can import it into a mysql database using tools such as PHPMyAdmin
Im not sure if this would help in your situation, but a csv file either manually or programatically would be a lot easier to parse into a database than an excel file I would have thought.
EDIT: I would however suggest looking at the other answers rather than mine since @diEcho answer seems more appropriate.
Can you load the GUIDs into a scratch table then do a
... WHERE var IN SELECT guid FROM #scratchtable
I think you can archive that by add multiple layout resource for each screen size, example:
res/layout/my_layout.xml // layout for normal screen size ("default")
res/layout-small/my_layout.xml // layout for small screen size with small text
res/layout-large/my_layout.xml // layout for large screen size with larger text
res/layout-xlarge/my_layout.xml // layout for extra large screen size with even larger text
res/layout-xlarge-land/my_layout.xml // layout for extra large in landscape orientation
Reference: 1.http://developer.android.com/guide/practices/screens_support.html
This is how you can do it. This code assumes the existance of a buffered image called 'image' (like your comment says)
// The required drawing location
int drawLocationX = 300;
int drawLocationY = 300;
// Rotation information
double rotationRequired = Math.toRadians (45);
double locationX = image.getWidth() / 2;
double locationY = image.getHeight() / 2;
AffineTransform tx = AffineTransform.getRotateInstance(rotationRequired, locationX, locationY);
AffineTransformOp op = new AffineTransformOp(tx, AffineTransformOp.TYPE_BILINEAR);
// Drawing the rotated image at the required drawing locations
g2d.drawImage(op.filter(image, null), drawLocationX, drawLocationY, null);
Much similar to @Gustavo Baiocchi Costa but offset is being calculated with another intermediate Substring
.
int innerTextStart = input.IndexOf("(") + 1;
int innerTextLength = input.Substring(start).IndexOf(")");
string output = input.Substring(innerTextStart, innerTextLength);
The problem arises when a different system grabs the $ variable. You have multiple $ variables being used as objects from multiple libraries, resulting in the error.
To solve it, use jQuery.noConflict just before your (function($){
:
jQuery.noConflict();
(function($){
$.fn.pluginbutton = function (options) {
...
I use latest CSS and "+" didn't work for me so I end up with
:first-child
{{ app.user.username|default('') }}
Just present login username for example, filter function default('') should be nice when user is NOT login by just avoid annoying error message.
"location" : null // this is not really an array it's a null object
"location" : [] // this is an empty array
It looks like this API returns null when there is no location defined - instead of returning an empty array, not too unusual really - but they should tell you if they're going to do this.
\b <= this is a word boundary.
Matches at a position that is followed by a word character but not preceded by a word character, or that is preceded by a word character but not followed by a word character.
\w <= stands for "word character".
It always matches the ASCII characters [A-Za-z0-9_]
Is there anything specific you are trying to match?
Some useful regex websites for beginners or just to wet your appetite.
I found this to be a very useful book:
Its not ideal but you can use a proxy server and it works fine. For example go to hidemyass.com put in www.google.com and put the link it goes to in an iframe and it works!
You can use default_scope to implement a default sort order http://api.rubyonrails.org/classes/ActiveRecord/Scoping/Default/ClassMethods.html
Following rokkuchan's answer, just a little upgrade:
List<string> listOfStrings = new List<string> {"abc", "123", "ghi"};
int index = listOfStrings.FindIndex(ind => ind.Equals("123"));
if (index > -1)
listOfStrings[index] = "def";
You could use git-sizer
. In the --verbose
setting, the example output is (below). Look for the Total size of files
line.
$ git-sizer --verbose Processing blobs: 1652370 Processing trees: 3396199 Processing commits: 722647 Matching commits to trees: 722647 Processing annotated tags: 534 Processing references: 539 | Name | Value | Level of concern | | ---------------------------- | --------- | ------------------------------ | | Overall repository size | | | | * Commits | | | | * Count | 723 k | * | | * Total size | 525 MiB | ** | | * Trees | | | | * Count | 3.40 M | ** | | * Total size | 9.00 GiB | **** | | * Total tree entries | 264 M | ***** | | * Blobs | | | | * Count | 1.65 M | * | | * Total size | 55.8 GiB | ***** | | * Annotated tags | | | | * Count | 534 | | | * References | | | | * Count | 539 | | | | | | | Biggest objects | | | | * Commits | | | | * Maximum size [1] | 72.7 KiB | * | | * Maximum parents [2] | 66 | ****** | | * Trees | | | | * Maximum entries [3] | 1.68 k | * | | * Blobs | | | | * Maximum size [4] | 13.5 MiB | * | | | | | | History structure | | | | * Maximum history depth | 136 k | | | * Maximum tag depth [5] | 1 | | | | | | | Biggest checkouts | | | | * Number of directories [6] | 4.38 k | ** | | * Maximum path depth [7] | 13 | * | | * Maximum path length [8] | 134 B | * | | * Number of files [9] | 62.3 k | * | | * Total size of files [9] | 747 MiB | | | * Number of symlinks [10] | 40 | | | * Number of submodules | 0 | | [1] 91cc53b0c78596a73fa708cceb7313e7168bb146 [2] 2cde51fbd0f310c8a2c5f977e665c0ac3945b46d [3] 4f86eed5893207aca2c2da86b35b38f2e1ec1fc8 (refs/heads/master:arch/arm/boot/dts) [4] a02b6794337286bc12c907c33d5d75537c240bd0 (refs/heads/master:drivers/gpu/drm/amd/include/asic_reg/vega10/NBIO/nbio_6_1_sh_mask.h) [5] 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c (refs/tags/v2.6.11) [6] 1459754b9d9acc2ffac8525bed6691e15913c6e2 (589b754df3f37ca0a1f96fccde7f91c59266f38a^{tree}) [7] 78a269635e76ed927e17d7883f2d90313570fdbc (dae09011115133666e47c35673c0564b0a702db7^{tree}) [8] ce5f2e31d3bdc1186041fdfd27a5ac96e728f2c5 (refs/heads/master^{tree}) [9] 532bdadc08402b7a72a4b45a2e02e5c710b7d626 (e9ef1fe312b533592e39cddc1327463c30b0ed8d^{tree}) [10] f29a5ea76884ac37e1197bef1941f62fda3f7b99 (f5308d1b83eba20e69df5e0926ba7257c8dd9074^{tree})
You actually don't need any jQuery to check if there is an overflow happening or not. Using element.offsetHeight
, element.offsetWidth
, element.scrollHeight
and element.scrollWidth
you can determine if your element have content bigger than it's size:
if (element.offsetHeight < element.scrollHeight ||
element.offsetWidth < element.scrollWidth) {
// your element have overflow
} else {
// your element doesn't have overflow
}
See example in action: Fiddle
But if you want to know what element inside your element is visible or not then you need to do more calculation. There is three states for a child element in terms of visibility:
If you want to count semi-visible items it would be the script you need:
var invisibleItems = [];
for(var i=0; i<element.childElementCount; i++){
if (element.children[i].offsetTop + element.children[i].offsetHeight >
element.offsetTop + element.offsetHeight ||
element.children[i].offsetLeft + element.children[i].offsetWidth >
element.offsetLeft + element.offsetWidth ){
invisibleItems.push(element.children[i]);
}
}
And if you don't want to count semi-visible you can calculate with a little difference.
This is perhaps orthogonal to the original question, but one could wrap the iterator in a function that returns the iterator.
def get_iter():
return iterator
To reset the iterator just call the function again. This is of course trivial if the function when the said function takes no arguments.
In the case that the function requires some arguments, use functools.partial to create a closure that can be passed instead of the original iterator.
def get_iter(arg1, arg2):
return iterator
from functools import partial
iter_clos = partial(get_iter, a1, a2)
This seems to avoid the caching that tee (n copies) or list (1 copy) would need to do
Your method signature makes no sense, are you sure it isn't a typo? I'm not clear how it's even compiling, though perhaps you're getting warnings that you're ignoring?
How many parameters do you expect this method to take?
This is not how SQL works:
INSERT INTO employee(hans,germany) values(?,?)
The values (hans,germany)
should use column names (emp_name, emp_address)
. The values are provided by your program by using the Statement.setString(pos,value)
methods. It is complaining because you said there were two parameters (the question marks) but didn't provide values.
You should be creating a PreparedStatement and then setting parameter values as in:
String insert= "INSERT INTO employee(emp_name,emp_address) values(?,?)";
PreparedStatement stmt = con.prepareStatement(insert);
stmt.setString(1,"hans");
stmt.setString(2,"germany");
stmt.execute();
This is a pretty good introductory video: http://vimeo.com/22685608
If you are looking for more on Rails and Backbone, Thoughtbot has this pretty good book (not free): https://workshops.thoughtbot.com/backbone-js-on-rails
If you pass a string variable (a well-formed JSON string) to JSON.parse from MVC @Viewbag that has doublequote, '"', as quotes, you need to process it before JSON.parse (jsonstring
)
var jsonstring = '@ViewBag.jsonstring';
jsonstring = jsonstring.replace(/"/g, '"');
In Addition to @Yifei answer. If you have special character like @, &, $
You have to go with percent-encode | encode the special characters. E.g. instead of this:
http://foo:B@[email protected]:80
you write this:
http://foo:B%[email protected]:80
So @
gets replaced with %40
.
This is how I rotate 360 in right direction.
[UIView animateWithDuration:1.0f delay:0.0f options:UIViewAnimationOptionRepeat|UIViewAnimationOptionCurveLinear
animations:^{
[imageIndView setTransform:CGAffineTransformRotate([imageIndView transform], M_PI-0.00001f)];
} completion:nil];
Generally you cannot translate from a time zone like Asia/Kolkata to a GMT offset like +05:30 or +07:00. A time zone, as the name says, is a place on earth and comprises the historic, present and known future UTC offsets used by the people in that place (for now we can regard GMT and UTC as synonyms, strictly speaking they are not). For example, Asia/Kolkata has been at offset +05:30 since 1945. During periods between 1941 and 1945 it was at +06:30 and before that time at +05:53:20 (yes, with seconds precision). Many other time zones have summer time (daylight saving time, DST) and change their offset twice a year.
Given a point in time, we can make the translation for that particular point in time, though. I should like to provide the modern way of doing that.
ZoneId zone = ZoneId.of("Asia/Kolkata");
ZoneOffset offsetIn1944 = LocalDateTime.of(1944, Month.JANUARY, 1, 0, 0)
.atZone(zone)
.getOffset();
System.out.println("Offset in 1944: " + offsetIn1944);
ZoneOffset offsetToday = OffsetDateTime.now(zone)
.getOffset();
System.out.println("Offset now: " + offsetToday);
Output when running just now was:
Offset in 1944: +06:30 Offset now: +05:30
For the default time zone set zone
to ZoneId.systemDefault()
.
To format the offset with the text GMT
use a formatter with OOOO
(four uppercase letter O) in the pattern:
DateTimeFormatter offsetFormatter = DateTimeFormatter.ofPattern("OOOO");
System.out.println(offsetFormatter.format(offsetToday));
GMT+05:30
I am recommending and in my code I am using java.time, the modern Java date and time API. The TimeZone
, Calendar
, Date
, SimpleDateFormat
and DateFormat
classes used in many of the other answers are poorly designed and now long outdated, so my suggestion is to avoid all of them.
Yes, java.time works nicely on older and newer Android devices. It just requires at least Java 6.
org.threeten.bp
with subpackages.java.time
was first described.java.time
to Java 6 and 7 (ThreeTen for JSR-310).It's helped me, I uninstalled EF, restarted VS and I added 'using':
using System.Data.Entity;
using System.Data.Entity.Core.Objects;
using System.Data.Entity.Infrastructure;
If you want to upload a single file with Python requests
library, then requests lib supports streaming uploads, which allow you to send large files or streams without reading into memory.
with open('massive-body', 'rb') as f:
requests.post('http://some.url/streamed', data=f)
Then store the file on the server.py
side such that save the stream into file without loading into the memory. Following is an example with using Flask file uploads.
@app.route("/upload", methods=['POST'])
def upload_file():
from werkzeug.datastructures import FileStorage
FileStorage(request.stream).save(os.path.join(app.config['UPLOAD_FOLDER'], filename))
return 'OK', 200
Or use werkzeug Form Data Parsing as mentioned in a fix for the issue of "large file uploads eating up memory" in order to avoid using memory inefficiently on large files upload (s.t. 22 GiB file in ~60 seconds. Memory usage is constant at about 13 MiB.).
@app.route("/upload", methods=['POST'])
def upload_file():
def custom_stream_factory(total_content_length, filename, content_type, content_length=None):
import tempfile
tmpfile = tempfile.NamedTemporaryFile('wb+', prefix='flaskapp', suffix='.nc')
app.logger.info("start receiving file ... filename => " + str(tmpfile.name))
return tmpfile
import werkzeug, flask
stream, form, files = werkzeug.formparser.parse_form_data(flask.request.environ, stream_factory=custom_stream_factory)
for fil in files.values():
app.logger.info(" ".join(["saved form name", fil.name, "submitted as", fil.filename, "to temporary file", fil.stream.name]))
# Do whatever with stored file at `fil.stream.name`
return 'OK', 200
There is nothing available that I'm aware of. The next best thing would be to simply have one script execute another via CLI, but that's a bit rudimentary. Depending on what you are trying to do and how complex it is, this may or may not be an option.
To append to an array, just use the +=
operator.
$Target += $TargetObject
Also, you need to declare $Target = @()
before your loop because otherwise, it will empty the array every loop.
The value of the certificate comes mostly from the trust of the internet users in the issuer of the certificate. To that end, Verisign is tough to beat. A certificate says to the client that you are who you say you are, and the issuer has verified that to be true.
You can get a free SSL certificate signed, for example, by StartSSL. This is an improvement on self-signed certificates, because your end-users would stop getting warning pop-ups informing them of a suspicious certificate on your end. However, the browser bar is not going to turn green when communicating with your site over https, so this solution is not ideal.
The cheapest SSL certificate that turns the bar green will cost you a few hundred dollars, and you would need to go through a process of proving the identity of your company to the issuer of the certificate by submitting relevant documents.
If you want formated number then use
SELECT TO_CHAR(number, 'fmt')
FROM DUAL;
SELECT TO_CHAR('123', 999.99)
FROM DUAL;
Result 123.00
You can do this with merge
:
df_merged = df1.merge(df2, how='outer', left_index=True, right_index=True)
The keyword argument how='outer'
keeps all indices from both frames, filling in missing indices with NaN
. The left_index
and right_index
keyword arguments have the merge be done on the indices. If you get all NaN
in a column after doing a merge, another troubleshooting step is to verify that your indices have the same dtypes
.
The merge
code above produces the following output for me:
V1 V2
A 2012-01-01 12.0 15.0
2012-02-01 14.0 NaN
2012-03-01 NaN 21.0
B 2012-01-01 15.0 24.0
2012-02-01 8.0 9.0
C 2012-01-01 17.0 NaN
2012-02-01 9.0 NaN
D 2012-01-01 NaN 7.0
2012-02-01 NaN 16.0
rather than doing complicated stuff, copy your repo (on your computer) to another place. delete the large file. do a couple of push and pull. Then some of your files will be messed up having things like "<<<<<< HEAD". Just copy your backup into the old folder on the disk. Do another add, commit, push!
I've implemented a different method to check for primes because:
Here is my implementation:
public static BigInteger IntegerSquareRoot(BigInteger value)
{
if (value > 0)
{
int bitLength = value.ToByteArray().Length * 8;
BigInteger root = BigInteger.One << (bitLength / 2);
while (!IsSquareRoot(value, root))
{
root += value / root;
root /= 2;
}
return root;
}
else return 0;
}
private static Boolean IsSquareRoot(BigInteger n, BigInteger root)
{
BigInteger lowerBound = root * root;
BigInteger upperBound = (root + 1) * (root + 1);
return (n >= lowerBound && n < upperBound);
}
static bool IsPrime(BigInteger value)
{
Console.WriteLine("Checking if {0} is a prime number.", value);
if (value < 3)
{
if (value == 2)
{
Console.WriteLine("{0} is a prime number.", value);
return true;
}
else
{
Console.WriteLine("{0} is not a prime number because it is below 2.", value);
return false;
}
}
else
{
if (value % 2 == 0)
{
Console.WriteLine("{0} is not a prime number because it is divisible by 2.", value);
return false;
}
else if (value == 5)
{
Console.WriteLine("{0} is a prime number.", value);
return true;
}
else if (value % 5 == 0)
{
Console.WriteLine("{0} is not a prime number because it is divisible by 5.", value);
return false;
}
else
{
// The only way this number is a prime number at this point is if it is divisible by numbers ending with 1, 3, 7, and 9.
AutoResetEvent success = new AutoResetEvent(false);
AutoResetEvent failure = new AutoResetEvent(false);
AutoResetEvent onesSucceeded = new AutoResetEvent(false);
AutoResetEvent threesSucceeded = new AutoResetEvent(false);
AutoResetEvent sevensSucceeded = new AutoResetEvent(false);
AutoResetEvent ninesSucceeded = new AutoResetEvent(false);
BigInteger squareRootedValue = IntegerSquareRoot(value);
Thread ones = new Thread(() =>
{
for (BigInteger i = 11; i <= squareRootedValue; i += 10)
{
if (value % i == 0)
{
Console.WriteLine("{0} is not a prime number because it is divisible by {1}.", value, i);
failure.Set();
}
}
onesSucceeded.Set();
});
ones.Start();
Thread threes = new Thread(() =>
{
for (BigInteger i = 3; i <= squareRootedValue; i += 10)
{
if (value % i == 0)
{
Console.WriteLine("{0} is not a prime number because it is divisible by {1}.", value, i);
failure.Set();
}
}
threesSucceeded.Set();
});
threes.Start();
Thread sevens = new Thread(() =>
{
for (BigInteger i = 7; i <= squareRootedValue; i += 10)
{
if (value % i == 0)
{
Console.WriteLine("{0} is not a prime number because it is divisible by {1}.", value, i);
failure.Set();
}
}
sevensSucceeded.Set();
});
sevens.Start();
Thread nines = new Thread(() =>
{
for (BigInteger i = 9; i <= squareRootedValue; i += 10)
{
if (value % i == 0)
{
Console.WriteLine("{0} is not a prime number because it is divisible by {1}.", value, i);
failure.Set();
}
}
ninesSucceeded.Set();
});
nines.Start();
Thread successWaiter = new Thread(() =>
{
AutoResetEvent.WaitAll(new WaitHandle[] { onesSucceeded, threesSucceeded, sevensSucceeded, ninesSucceeded });
success.Set();
});
successWaiter.Start();
int result = AutoResetEvent.WaitAny(new WaitHandle[] { success, failure });
try
{
successWaiter.Abort();
}
catch { }
try
{
ones.Abort();
}
catch { }
try
{
threes.Abort();
}
catch { }
try
{
sevens.Abort();
}
catch { }
try
{
nines.Abort();
}
catch { }
if (result == 1)
{
return false;
}
else
{
Console.WriteLine("{0} is a prime number.", value);
return true;
}
}
}
}
Update: If you want to implement a solution with trial division more rapidly, you might consider having a cache of prime numbers. A number is only prime if it is not divisible by other prime numbers that are up to the value of its square root. Other than that, you might consider using the probabilistic version of the Miller-Rabin primality test to check for a number's primality if you are dealing with large enough values (taken from Rosetta Code in case the site ever goes down):
// Miller-Rabin primality test as an extension method on the BigInteger type.
// Based on the Ruby implementation on this page.
public static class BigIntegerExtensions
{
public static bool IsProbablePrime(this BigInteger source, int certainty)
{
if(source == 2 || source == 3)
return true;
if(source < 2 || source % 2 == 0)
return false;
BigInteger d = source - 1;
int s = 0;
while(d % 2 == 0)
{
d /= 2;
s += 1;
}
// There is no built-in method for generating random BigInteger values.
// Instead, random BigIntegers are constructed from randomly generated
// byte arrays of the same length as the source.
RandomNumberGenerator rng = RandomNumberGenerator.Create();
byte[] bytes = new byte[source.ToByteArray().LongLength];
BigInteger a;
for(int i = 0; i < certainty; i++)
{
do
{
// This may raise an exception in Mono 2.10.8 and earlier.
// http://bugzilla.xamarin.com/show_bug.cgi?id=2761
rng.GetBytes(bytes);
a = new BigInteger(bytes);
}
while(a < 2 || a >= source - 2);
BigInteger x = BigInteger.ModPow(a, d, source);
if(x == 1 || x == source - 1)
continue;
for(int r = 1; r < s; r++)
{
x = BigInteger.ModPow(x, 2, source);
if(x == 1)
return false;
if(x == source - 1)
break;
}
if(x != source - 1)
return false;
}
return true;
}
}
You may also get this warning for MS Fakes assemblies which isn't as easy to resolve since the f.csproj is build on command. Luckily the Fakes xml allows you to add it in there.
I suppose you don't want to change get_sublist
function, and just want to use DataFrame's apply
method to do the job. To get the result you want, I've wrote two help functions: get_sublist_list
and unlist
. As the function name suggest, first get the list of sublist, second extract that sublist from that list. Finally, We need to call apply
function to apply those two functions to the df[['col_1','col_2']]
DataFrame subsequently.
import pandas as pd
df = pd.DataFrame({'ID':['1','2','3'], 'col_1': [0,2,3], 'col_2':[1,4,5]})
mylist = ['a','b','c','d','e','f']
def get_sublist(sta,end):
return mylist[sta:end+1]
def get_sublist_list(cols):
return [get_sublist(cols[0],cols[1])]
def unlist(list_of_lists):
return list_of_lists[0]
df['col_3'] = df[['col_1','col_2']].apply(get_sublist_list,axis=1).apply(unlist)
df
If you don't use []
to enclose the get_sublist
function, then the get_sublist_list
function will return a plain list, it'll raise ValueError: could not broadcast input array from shape (3) into shape (2)
, as @Ted Petrou had mentioned.
On modern browsers (FF >= 3.6, Chrome >= 19.0, Opera >= 12.0, and buggy on Safari), you can use the HTML5 File API. When the value of a file input changes, this API will allow you to check whether the file size is within your requirements. Of course, this, as well as MAX_FILE_SIZE
, can be tampered with so always use server side validation.
<form method="post" enctype="multipart/form-data" action="upload.php">
<input type="file" name="file" id="file" />
<input type="submit" name="submit" value="Submit" />
</form>
<script>
document.forms[0].addEventListener('submit', function( evt ) {
var file = document.getElementById('file').files[0];
if(file && file.size < 10485760) { // 10 MB (this size is in bytes)
//Submit form
} else {
//Prevent default and display error
evt.preventDefault();
}
}, false);
</script>
On the server side, it is impossible to stop an upload from happening from PHP because once PHP has been invoked the upload has already completed. If you are trying to save bandwidth, you can deny uploads from the server side with the ini setting upload_max_filesize
. The trouble with this is this applies to all uploads so you'll have to pick something liberal that works for all of your uploads. The use of MAX_FILE_SIZE
has been discussed in other answers. I suggest reading the manual on it. Do know that it, along with anything else client side (including the javascript check), can be tampered with so you should always have server side (PHP) validation.
On the server side you should validate that the file is within the size restrictions (because everything up to this point except for the INI setting could be tampered with). You can use the $_FILES
array to find out the upload size. (Docs on the contents of $_FILES
can be found below the MAX_FILE_SIZE
docs)
upload.php
<?php
if(isset($_FILES['file'])) {
if($_FILES['file']['size'] > 10485760) { //10 MB (size is also in bytes)
// File too big
} else {
// File within size restrictions
}
}
You probably get the error because your video path may be wrong in a way. Be sure your path is completely correct.
- Another Update -
Since Twitter Bootstrap version 2.0 - which saw the removal of the .container-fluid
class - it has not been possible to implement a two column fixed-fluid layout using just the bootstrap classes - however I have updated my answer to include some small CSS changes that can be made in your own CSS code that will make this possible
It is possible to implement a fixed-fluid structure using the CSS found below and slightly modified HTML code taken from the Twitter Bootstrap Scaffolding : layouts documentation page:
<div class="container-fluid fill">
<div class="row-fluid">
<div class="fixed"> <!-- we want this div to be fixed width -->
...
</div>
<div class="hero-unit filler"> <!-- we have removed spanX class -->
...
</div>
</div>
</div>
/* CSS for fixed-fluid layout */
.fixed {
width: 150px; /* the fixed width required */
float: left;
}
.fixed + div {
margin-left: 150px; /* must match the fixed width in the .fixed class */
overflow: hidden;
}
/* CSS to ensure sidebar and content are same height (optional) */
html, body {
height: 100%;
}
.fill {
min-height: 100%;
position: relative;
}
.filler:after{
background-color:inherit;
bottom: 0;
content: "";
height: auto;
min-height: 100%;
left: 0;
margin:inherit;
right: 0;
position: absolute;
top: 0;
width: inherit;
z-index: -1;
}
I have kept the answer below - even though the edit to support 2.0 made it a fluid-fluid solution - as it explains the concepts behind making the sidebar and content the same height (a significant part of the askers question as identified in the comments)
Update As pointed out by @JasonCapriotti in the comments, the original answer to this question (created for v1.0) did not work in Bootstrap 2.0. For this reason, I have updated the answer to support Bootstrap 2.0
To ensure that the main content fills at least 100% of the screen height, we need to set the height of the html
and body
to 100% and create a new css class called .fill
which has a minimum-height of 100%:
html, body {
height: 100%;
}
.fill {
min-height: 100%;
}
We can then add the .fill
class to any element that we need to take up 100% of the sceen height. In this case we add it to the first div:
<div class="container-fluid fill">
...
</div>
To ensure that the Sidebar and the Content columns have the same height is very difficult and unnecessary. Instead we can use the ::after
pseudo selector to add a filler
element that will give the illusion that the two columns have the same height:
.filler::after {
background-color: inherit;
bottom: 0;
content: "";
right: 0;
position: absolute;
top: 0;
width: inherit;
z-index: -1;
}
To make sure that the .filler
element is positioned relatively to the .fill
element we need to add position: relative
to .fill
:
.fill {
min-height: 100%;
position: relative;
}
And finally add the .filler
style to the HTML:
HTML
<div class="container-fluid fill">
<div class="row-fluid">
<div class="span3">
...
</div>
<div class="span9 hero-unit filler">
...
</div>
</div>
</div>
Notes
right: 0
to left: 0
.$.each(JSON.parse(result), function(i, item) {
alert(item.number);
});
You can use the Android app Barcode Scanner Terminal (DISCLAIMER! I'm the developer). It can scan the barcode and send it to the PC and in your case enter it on the web form. More details here.
select cast (height as decimal)/10 as HeightDecimal
With:
global index_add_counter
You are not defining, just declaring so it's like saying there is a global index_add_counter
variable elsewhere, and not create a global called index_add_counter
. As you name don't exists, Python is telling you it can not import that name. So you need to simply remove the global
keyword and initialize your variable:
index_add_counter = 0
Now you can import it with:
from app import index_add_counter
The construction:
global index_add_counter
is used inside modules' definitions to force the interpreter to look for that name in the modules' scope, not in the definition one:
index_add_counter = 0
def test():
global index_add_counter # means: in this scope, use the global name
print(index_add_counter)
I had a similar problem. It turned out that I had an alias defined for python like so:
alias python=/usr/bin/python3
Apparently virtualenv does not check or update your aliases.
So the solution for me was to remove the alias:
unalias python
Now when I run python, I get the one from the virtual environment. Problem solved.
You can try to use this
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
<item>
<shape
android:innerRadius="0dp"
android:shape="ring"
android:thicknessRatio="2"
android:useLevel="false" >
<solid android:color="@color/button_blue_two" />
</shape>
</item>
and you don't have to bother the width and height aspect ratio if you are using this for a textview
Any of these will work from the shell command line. bc
is probably your most straight forward solution though.
Using bc:
$ echo "$d1 - $d2" | bc
Using awk
:
$ echo $d1 $d2 | awk '{print $1 - $2}'
Using perl
:
$ perl -E "say $d1 - $d2"
Using Python
:
$ python -c "print $d1 - $d2"
all return
4
BEWARE : Order of update columns is critical
GOOD: What I want saves existing Value of Status to PrevStatus
UPDATE Collections SET PrevStatus=Status, Status=44 WHERE ID=1487496;
BAD: Status & PrevStatus both end up as 44
UPDATE Collections SET Status=44, PrevStatus=Status WHERE ID=1487496;
Put the list numbers in parentheses instead of followed by a period.
(1) item 1
(2) item 2
code block
(3) item 3
Here's a possible solution:
public class NumInput {
public static void main(String [] args) {
int min = Integer.MAX_VALUE;
int max = Integer.MIN_VALUE;
Scanner s = new Scanner(System.in);
while (true) {
System.out.print("Enter a Value: ");
int val = s.nextInt();
if (val == 0) {
break;
}
if (val < min) {
min = val;
}
if (val > max) {
max = val;
}
}
System.out.println("min: " + min);
System.out.println("max: " + max);
}
}
(not sure about using int or double thought)
You can use jackson library and simply use these 3 lines to convert your json file to Java Object.
ObjectMapper mapper = new ObjectMapper();
InputStream is = Test.class.getResourceAsStream("/test.json");
testObj = mapper.readValue(is, Test.class);
If you are using jQuery and you want to add content to the existing contents of the div, you can use .html()
within the brackets:
$("#log").html($('#log').html() + " <br>New content!");
_x000D_
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>_x000D_
<div id="log">Initial Content</div>
_x000D_
This is how I do it.
I don't like the idea of creating a new collection and reverse iterating it.
The IntStream#map idea is pretty neat, but I prefer the IntStream#iterate method, for I think the idea of a countdown to Zero better expressed with the iterate method and easier to understand in terms of walking the array from back to front.
import static java.lang.Math.max;
private static final double EXACT_MATCH = 0d;
public static IntStream reverseStream(final int[] array) {
return countdownFrom(array.length - 1).map(index -> array[index]);
}
public static DoubleStream reverseStream(final double[] array) {
return countdownFrom(array.length - 1).mapToDouble(index -> array[index]);
}
public static <T> Stream<T> reverseStream(final T[] array) {
return countdownFrom(array.length - 1).mapToObj(index -> array[index]);
}
public static IntStream countdownFrom(final int top) {
return IntStream.iterate(top, t -> t - 1).limit(max(0, (long) top + 1));
}
Here are some tests to prove it works:
import static java.lang.Integer.MAX_VALUE;
import static org.junit.Assert.*;
@Test
public void testReverseStream_emptyArrayCreatesEmptyStream() {
Assert.assertEquals(0, reverseStream(new double[0]).count());
}
@Test
public void testReverseStream_singleElementCreatesSingleElementStream() {
Assert.assertEquals(1, reverseStream(new double[1]).count());
final double[] singleElementArray = new double[] { 123.4 };
assertArrayEquals(singleElementArray, reverseStream(singleElementArray).toArray(), EXACT_MATCH);
}
@Test
public void testReverseStream_multipleElementsAreStreamedInReversedOrder() {
final double[] arr = new double[] { 1d, 2d, 3d };
final double[] revArr = new double[] { 3d, 2d, 1d };
Assert.assertEquals(arr.length, reverseStream(arr).count());
Assert.assertArrayEquals(revArr, reverseStream(arr).toArray(), EXACT_MATCH);
}
@Test
public void testCountdownFrom_returnsAllElementsFromTopToZeroInReverseOrder() {
assertArrayEquals(new int[] { 4, 3, 2, 1, 0 }, countdownFrom(4).toArray());
}
@Test
public void testCountdownFrom_countingDownStartingWithZeroOutputsTheNumberZero() {
assertArrayEquals(new int[] { 0 }, countdownFrom(0).toArray());
}
@Test
public void testCountdownFrom_doesNotChokeOnIntegerMaxValue() {
assertEquals(true, countdownFrom(MAX_VALUE).anyMatch(x -> x == MAX_VALUE));
}
@Test
public void testCountdownFrom_givesZeroLengthCountForNegativeValues() {
assertArrayEquals(new int[0], countdownFrom(-1).toArray());
assertArrayEquals(new int[0], countdownFrom(-4).toArray());
}
If you want to enable item click in list view use
listitem.setClickable(false);
this may seem wrong at first glance but it works!
Personally, because I use both PHP and jQuery/javascript in equal measures, I use the date function from php.js http://phpjs.org/functions/date/
Using a library that uses the same format strings as something I already know is easier for me, and the manual containing all of the format string possibilities for the date function is of course online at php.net
You simply include the date.js file in your HTML using your preferred method then call it like this:
var d1=new Date();
var datestring = date('Y-m-d', d1.valueOf()/1000);
You can use d1.getTime() instead of valueOf() if you want, they do the same thing.
The divide by 1000 of the javascript timestamp is because a javascript timestamp is in miliseconds but a PHP timestamp is in seconds.
Here is how I made monthly page in similar manner as Fernando:
I made five weeks on every page and on fifth week I made function
=IF(C12=5,DATE(YEAR(B48),MONTH(B48),DAY(B48)+7),"")
that empties fifth week if this month has only four weeks. C12 holds the number of weeks.
Insert following function on the first day field starting sheet #2:
=INDIRECT(CONCATENATE("'Month (",ThisMonth-1,")'!B15"))+INDIRECT(CONCATENATE("'Month (",ThisMonth-1,")'!C12"))*7
So in another word, if you fill four or five weeks on the previous sheet, this calculates date correctly and continues from correct date.
Extension of VolkerK's answer, to make code a little more readable, you can use AS to reference the count, example below:
SELECT COUNT(*) AS c from profile
This makes for much easier reading in some frameworks, for example, i'm using Exponent's (React Native) Sqlite integration, and without the AS statement, the code is pretty ugly.
You need to bind this to the constructor and remember that changes to constructor needs restarting the server. Or else, you will end with the same error.
... org.codehaus.mojo cobertura-maven-plugin 2.7 test ch.qos.logback logback-classic tools com.sun ...
## I fixed with this
... org.codehaus.mojo cobertura-maven-plugin 2.7 test ch.qos.logback logback-classic tools com.sun ...
I met the same problem.
First delete build
folder from project location (You can access it via android studio or using explorer), then build
the project.
I have also noticed that cordova has a "serve" command that Phonegap doesn't. This command launches a local server on port 8000. This is handy for running your app in Chrome and using the Ripple emulator.
I think this is the syntax you are looking for:
if [ -z != $errorstatus ]
then
commands
else
commands
fi
I did it in the following way.
form
element (which is placed inside the modal) anID
.data-dimiss
an ID
.onclick
method when data-dimiss
is being clicked.Use the trigger()
function on the form
element.
I am adding the code example with it.
$(document).ready(function()
{
$('#mod_cls').on('click', function () {
$('#Q_A').trigger("reset");
console.log($('#Q_A'));
})
});
<div class="modal fade " id="myModal2" role="dialog" >
<div class="modal-dialog">
<!-- Modal content-->
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" ID="mod_cls" data-dismiss="modal">×</button>
<h4 class="modal-title" >Ask a Question</h4>
</div>
<div class="modal-body">
<form role="form" action="" id="Q_A" method="POST">
<div class="form-group">
<label for="Question"></label>
<input type="text" class="form-control" id="question" name="question">
</div>
<div class="form-group">
<label for="sub_name">Subject*</label>
<input type="text" class="form-control" id="sub_name" NAME="sub_name">
</div>
<div class="form-group">
<label for="chapter_name">Chapter*</label>
<input type="text" class="form-control" id="chapter_name" NAME="chapter_name">
</div>
<button type="submit" class="btn btn-default btn-success btn-block"> Post</button>
</form>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">Cancel</button><!--initially the visibility of "upload another note" is hidden ,but it becomes visible as soon as one note is uploaded-->
</div>
</div>
</div>
</div>
Hope this will help others as I was struggling with it since a long time.
The best way to catch the position is by FindIndex
This function is available only for List<>
Example
int id = listMyObject.FindIndex(x => x.Id == 15);
If you have enumerator or array use this way
int id = myEnumerator.ToList().FindIndex(x => x.Id == 15);
or
int id = myArray.ToList().FindIndex(x => x.Id == 15);
$formattedPrice = Mage::helper('core')->currency($_finalPrice,true,false);
You'll have to use the ChannelFactory class.
Here's an example:
var myBinding = new BasicHttpBinding();
var myEndpoint = new EndpointAddress("http://localhost/myservice");
using (var myChannelFactory = new ChannelFactory<IMyService>(myBinding, myEndpoint))
{
IMyService client = null;
try
{
client = myChannelFactory.CreateChannel();
client.MyServiceOperation();
((ICommunicationObject)client).Close();
myChannelFactory.Close();
}
catch
{
(client as ICommunicationObject)?.Abort();
}
}
Related resources:
To answer the first question of the three asked, a simple way to see if the .htaccess file is working or not is to trigger a custom error at the top of the .htaccess file:
ErrorDocument 200 "Hello. This is your .htaccess file talking."
RewriteRule ^ - [L,R=200]
On to your second question, if the .htaccess file is not being read it is possible that the server's main Apache configuration has AllowOverride
set to None
. Apache's documentation has troubleshooting tips for that and other cases that may be preventing the .htaccess from taking effect.
Finally, to answer your third question, if you need to debug specific variables you are referencing in your rewrite rule or are using an expression that you want to evaluate independently of the rule you can do the following:
Output the variable you are referencing to make sure it has the value you are expecting:
ErrorDocument 200 "Request: %{THE_REQUEST} Referrer: %{HTTP_REFERER} Host: %{HTTP_HOST}"
RewriteRule ^ - [L,R=200]
Test the expression independently by putting it in an <If>
Directive. This allows you to make sure your expression is written properly or matching when you expect it to:
<If "%{REQUEST_URI} =~ /word$/">
ErrorDocument 200 "Your expression is priceless!"
RewriteRule ^ - [L,R=200]
</If>
Happy .htaccess debugging!
Try this...
import java.util.concurrent.TimeUnit;
import com.google.common.base.Stopwatch;
public class StopwatchTest {
public static void main(String[] args) throws Exception {
Stopwatch stopwatch = Stopwatch.createStarted();
Thread.sleep(1000 * 60);
stopwatch.stop(); // optional
long millis = stopwatch.elapsed(TimeUnit.MILLISECONDS);
System.out.println("Time in milliseconds "+millis);
System.out.println("that took: " + stopwatch);
}
}
I had the same issue like below
"java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: YES)". Problem was "WRONG PASSWORD".
Copy and paste the query as-it-is in the shell to check whether it gives the desired output or not. Small errors consumes more time.
It depends on the scenario. XmlSerializer
is certainly one way and has the advantage of mapping directly to an object model. In .NET 3.5, XDocument
, etc. are also very friendly. If the size is very large, then XmlWriter
is your friend.
For an XDocument
example:
Console.WriteLine(
new XElement("Foo",
new XAttribute("Bar", "some & value"),
new XElement("Nested", "data")));
Or the same with XmlDocument
:
XmlDocument doc = new XmlDocument();
XmlElement el = (XmlElement)doc.AppendChild(doc.CreateElement("Foo"));
el.SetAttribute("Bar", "some & value");
el.AppendChild(doc.CreateElement("Nested")).InnerText = "data";
Console.WriteLine(doc.OuterXml);
If you are writing a large stream of data, then any of the DOM approaches (such as XmlDocument
/XDocument
, etc.) will quickly take a lot of memory. So if you are writing a 100 MB XML file from CSV, you might consider XmlWriter
; this is more primitive (a write-once firehose), but very efficient (imagine a big loop here):
XmlWriter writer = XmlWriter.Create(Console.Out);
writer.WriteStartElement("Foo");
writer.WriteAttributeString("Bar", "Some & value");
writer.WriteElementString("Nested", "data");
writer.WriteEndElement();
Finally, via XmlSerializer
:
[Serializable]
public class Foo
{
[XmlAttribute]
public string Bar { get; set; }
public string Nested { get; set; }
}
...
Foo foo = new Foo
{
Bar = "some & value",
Nested = "data"
};
new XmlSerializer(typeof(Foo)).Serialize(Console.Out, foo);
This is a nice model for mapping to classes, etc.; however, it might be overkill if you are doing something simple (or if the desired XML doesn't really have a direct correlation to the object model). Another issue with XmlSerializer
is that it doesn't like to serialize immutable types : everything must have a public getter and setter (unless you do it all yourself by implementing IXmlSerializable
, in which case you haven't gained much by using XmlSerializer
).
Try this:
$hourMin = date('H:i');
This will be 24-hour time with an hour that is always two digits. For all options, see the PHP docs for date().
If you are open to use third party tools you'd have a look at this one: https://github.com/CircleOfNice/DoctrineRestDriver
This is a completely new way to work with APIs.
First of all you define an entity which is defining the structure of incoming and outcoming data and annotate it with datasources:
/*
* @Entity
* @DataSource\Select("http://www.myApi.com/products/{id}")
* @DataSource\Insert("http://www.myApi.com/products")
* @DataSource\Select("http://www.myApi.com/products/update/{id}")
* @DataSource\Fetch("http://www.myApi.com/products")
* @DataSource\Delete("http://www.myApi.com/products/delete/{id}")
*/
class Product {
private $name;
public function setName($name) {
$this->name = $name;
}
public function getName() {
return $this->name;
}
}
Now it's pretty easy to communicate with the REST API:
$product = new Product();
$product->setName('test');
// sends an API request POST http://www.myApi.com/products ...
$em->persist($product);
$em->flush();
$product->setName('newName');
// sends an API request UPDATE http://www.myApi.com/products/update/1 ...
$em->flush();
As name suggest here memory buffer used to manage how the output of script appears.
Here is one very good tutorial for the topic
You can use the lastval()
function:
Return value most recently obtained with
nextval
for any sequence
So something like this:
INSERT INTO Table1 (name) VALUES ('a_title');
INSERT INTO Table2 (val) VALUES (lastval());
This will work fine as long as no one calls nextval()
on any other sequence (in the current session) between your INSERTs.
As Denis noted below and I warned about above, using lastval()
can get you into trouble if another sequence is accessed using nextval()
between your INSERTs. This could happen if there was an INSERT trigger on Table1
that manually called nextval()
on a sequence or, more likely, did an INSERT on a table with a SERIAL
or BIGSERIAL
primary key. If you want to be really paranoid (a good thing, they really are you to get you after all), then you could use currval()
but you'd need to know the name of the relevant sequence:
INSERT INTO Table1 (name) VALUES ('a_title');
INSERT INTO Table2 (val) VALUES (currval('Table1_id_seq'::regclass));
The automatically generated sequence is usually named t_c_seq
where t
is the table name and c
is the column name but you can always find out by going into psql
and saying:
=> \d table_name;
and then looking at the default value for the column in question, for example:
id | integer | not null default nextval('people_id_seq'::regclass)
FYI: lastval()
is, more or less, the PostgreSQL version of MySQL's LAST_INSERT_ID
. I only mention this because a lot of people are more familiar with MySQL than PostgreSQL so linking lastval()
to something familiar might clarify things.
Import timedelta
and date
first.
from datetime import timedelta, date
And date.today()
will return today's datetime, may be you want
EndDate = date.today() + timedelta(days=10)
This does not strictly answer the original question but some people have mentioned that with session.autoflush = True
you don't have to use session.flush()
... And this is not always true.
If you want to use the id of a newly created object in the middle of a transaction, you must call session.flush()
.
# Given a model with at least this id
class AModel(Base):
id = Column(Integer, primary_key=True) # autoincrement by default on integer primary key
session.autoflush = True
a = AModel()
session.add(a)
a.id # None
session.flush()
a.id # autoincremented integer
This is because autoflush
does NOT auto fill the id (although a query of the object will, which sometimes can cause confusion as in "why this works here but not there?" But snapshoe already covered this part).
One related aspect that seems pretty important to me and wasn't really mentioned:
Why would you not commit all the time? - The answer is atomicity.
A fancy word to say: an ensemble of operations have to all be executed successfully OR none of them will take effect.
For example, if you want to create/update/delete some object (A) and then create/update/delete another (B), but if (B) fails you want to revert (A). This means those 2 operations are atomic.
Therefore, if (B) needs a result of (A), you want to call flush
after (A) and commit
after (B).
Also, if session.autoflush is True
, except for the case that I mentioned above or others in Jimbo's answer, you will not need to call flush
manually.
function timeConverter(UNIX_timestamp){
var a = new Date(UNIX_timestamp*1000);
var hour = a.getUTCHours();
var min = a.getUTCMinutes();
var sec = a.getUTCSeconds();
var time = hour+':'+min+':'+sec ;
return time;
}
I`m using the following code to validate credentials. The method shown below will confirm if the credentials are correct and if not wether the password is expired or needs change.
I`ve been looking for something like this for ages... So i hope this helps someone!
using System;
using System.DirectoryServices;
using System.DirectoryServices.AccountManagement;
using System.Runtime.InteropServices;
namespace User
{
public static class UserValidation
{
[DllImport("advapi32.dll", SetLastError = true)]
static extern bool LogonUser(string principal, string authority, string password, LogonTypes logonType, LogonProviders logonProvider, out IntPtr token);
[DllImport("kernel32.dll", SetLastError = true)]
static extern bool CloseHandle(IntPtr handle);
enum LogonProviders : uint
{
Default = 0, // default for platform (use this!)
WinNT35, // sends smoke signals to authority
WinNT40, // uses NTLM
WinNT50 // negotiates Kerb or NTLM
}
enum LogonTypes : uint
{
Interactive = 2,
Network = 3,
Batch = 4,
Service = 5,
Unlock = 7,
NetworkCleartext = 8,
NewCredentials = 9
}
public const int ERROR_PASSWORD_MUST_CHANGE = 1907;
public const int ERROR_LOGON_FAILURE = 1326;
public const int ERROR_ACCOUNT_RESTRICTION = 1327;
public const int ERROR_ACCOUNT_DISABLED = 1331;
public const int ERROR_INVALID_LOGON_HOURS = 1328;
public const int ERROR_NO_LOGON_SERVERS = 1311;
public const int ERROR_INVALID_WORKSTATION = 1329;
public const int ERROR_ACCOUNT_LOCKED_OUT = 1909; //It gives this error if the account is locked, REGARDLESS OF WHETHER VALID CREDENTIALS WERE PROVIDED!!!
public const int ERROR_ACCOUNT_EXPIRED = 1793;
public const int ERROR_PASSWORD_EXPIRED = 1330;
public static int CheckUserLogon(string username, string password, string domain_fqdn)
{
int errorCode = 0;
using (PrincipalContext pc = new PrincipalContext(ContextType.Domain, domain_fqdn, "ADMIN_USER", "PASSWORD"))
{
if (!pc.ValidateCredentials(username, password))
{
IntPtr token = new IntPtr();
try
{
if (!LogonUser(username, domain_fqdn, password, LogonTypes.Network, LogonProviders.Default, out token))
{
errorCode = Marshal.GetLastWin32Error();
}
}
catch (Exception)
{
throw;
}
finally
{
CloseHandle(token);
}
}
}
return errorCode;
}
}
I was using an input to collect and show the calendar, and to be able to resize the calendar I have been using this code:
div.ui-datepicker, .ui-datepicker input{font-size:62.5%;}
It works like a charm.
import java.io.File;
public class Test {
public static void main( String [] args ) {
File actual = new File(".");
for( File f : actual.listFiles()){
System.out.println( f.getName() );
}
}
}
It displays indistinctly files and folders.
See the methods in File class to order them or avoid directory print etc.
The json.load()
method (without "s" in "load") can read a file directly:
import json
with open('strings.json') as f:
d = json.load(f)
print(d)
You were using the json.loads()
method, which is used for string arguments only.
Edit: The new message is a totally different problem. In that case, there is some invalid json in that file. For that, I would recommend running the file through a json validator.
There are also solutions for fixing json like for example How do I automatically fix an invalid JSON string?.
Here is an example using shell (bash
):
#!/bin/bash
# loop & print a folder recusively,
print_folder_recurse() {
for i in "$1"/*;do
if [ -d "$i" ];then
echo "dir: $i"
print_folder_recurse "$i"
elif [ -f "$i" ]; then
echo "file: $i"
fi
done
}
# try get path from param
path=""
if [ -d "$1" ]; then
path=$1;
else
path="/tmp"
fi
echo "base path: $path"
print_folder_recurse $path
Using sindresorhus's fkill tool, you can do this:
$ fkill :3000
AppDomain.CurrentDomain.BaseDirectory
works with MbUnit GUI.
Show all deleted files in some_branch
git diff origin/master...origin/some_branch --name-status | grep ^D
or
git diff origin/master...origin/some_branch --name-status --diff-filter=D
Use properties file. Here is a good start: http://www.mkyong.com/java/java-properties-file-examples/
I am using Idea 8. in your module dependancies tab (in the project structure dialog). Add a "Module Library". There you can select a Jar Directory to add. Then make sure the run profile is using the Classpath and JDK of the correct module when it runs (this is in the run config dialog.
In addition to the --routines flag you will need to grant the backup user permissions to read the stored procedures:
GRANT SELECT ON `mysql`.`proc` TO <backup user>@<backup host>;
My minimal set of GRANT privileges for the backup user are:
GRANT USAGE ON *.* TO ...
GRANT SELECT, LOCK TABLES ON <target_db>.* TO ...
GRANT SELECT ON `mysql`.`proc` TO ...
On many source packages (e.g. for most GNU software), the building system may know about the DESTDIR
make variable, so you can often do:
make install DESTDIR=/tmp/myinst/
sudo cp -va /tmp/myinst/ /
The advantage of this approach is that make install
don't need to run as root, so you cannot end up with files compiled as root (or root-owned files in your build tree).
var dates = dates_as_int.map(function(dateStr) {
return new Date(dateStr).getTime();
});
=>
[1468959781804, 1469029434776, 1469199218634, 1469457574527]
Update: ES6 version:
const dates = dates_as_int.map(date => new Date(date).getTime())
I find, that psql show password prompt even you define PGPASSWORD variable, but you can specify -w option for psql to omit password prompt.
When you use a web service you have a client and a server:
When you use a message queue like RabbitMQ, Beanstalkd, ActiveMQ, IBM MQ Series, Tuxedo you expect different and more fault tolerant results:
Message Queues has a lot more features but this is some rule of thumb to decide if you want to handle error conditions yourself or leave them to the message queue.
In my case I created the following kotlin ext. function, may be useful to someone
private fun EditText.focus(){
requestFocus()
setSelection(length())
}
Then use as follows
mEditText.focus()
Suppose ListView object is lv, do the following-
lv.setClickable(true);
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int position, long arg3) {
Object o = lv.getItemAtPosition(position);
/* write you handling code like...
String st = "sdcard/";
File f = new File(st+o.toString());
// do whatever u want to do with 'f' File object
*/
}
});
You can use the OpenSSL Command line tool. The following commands should do the trick
openssl pkcs12 -in client_ssl.pfx -out client_ssl.pem -clcerts
openssl pkcs12 -in client_ssl.pfx -out root.pem -cacerts
If you want your file to be password protected etc, then there are additional options.
You can read the entire documentation here.
Not a direct answer, but may help some people ending up here.
If you are using GatsbyJS there is a plugin that automatically adds target="_blank"
to external links in your markdown.
It's called gatsby-remark-external-links and the usage is like so:
yarn add gatsby-remark-external-links
plugins: [
{
resolve: `gatsby-transformer-remark`,
options: {
plugins: [{
resolve: "gatsby-remark-external-links",
options: {
target: "_blank",
rel: "noopener noreferrer"
}
}]
}
},
It also takes care of the rel="noopener noreferrer"
.
Reference the docs if you need more options.
I agree with Petar Ivanov but it is best if we implement in following way:
public String replace(String str, int index, char replace){
if(str==null){
return str;
}else if(index<0 || index>=str.length()){
return str;
}
char[] chars = str.toCharArray();
chars[index] = replace;
return String.valueOf(chars);
}
Unfortunately, there is no standard way to print using Python on all platforms. So you'll need to write your own wrapper function to print.
You need to detect the OS your program is running on, then:
For Linux -
import subprocess
lpr = subprocess.Popen("/usr/bin/lpr", stdin=subprocess.PIPE)
lpr.stdin.write(your_data_here)
For Windows: http://timgolden.me.uk/python/win32_how_do_i/print.html
More resources:
Print PDF document with python's win32print module?
How do I print to the OS's default printer in Python 3 (cross platform)?
I resolved conflicts and also committed but still getting this error message on git push
All conflicts fixed but you are still merging.
(use "git commit" to conclude merge)
I did these steps to resolve error:
rm -rf .git/MERGE*
git pull origin branch_name
git push origin branch_name
Generic toString() one-liner, using reflection and style customization:
import org.apache.commons.lang3.builder.ReflectionToStringBuilder;
import org.apache.commons.lang3.builder.ToStringStyle;
...
public String toString()
{
return ReflectionToStringBuilder.toString(this, ToStringStyle.SHORT_PREFIX_STYLE);
}
You should have that property defined in your model or entity class.
mysql int types can do quite a few rows: http://dev.mysql.com/doc/refman/5.0/en/numeric-types.html
unsigned int
largest value is 4,294,967,295
unsigned bigint
largest value is 18,446,744,073,709,551,615
Doing nvm install 10.14
, for example, will nvm use
that version for the current shell session but it will not always set it as the default for future sessions as you would expect. The node version you get in a new shell session is determined by nvm alias default
. Confusingly, nvm install
will only set the default alias if it is not already set. To get the expected behaviour, do this:
nvm alias default ''; nvm install 10.14
This will ensure that that version is downloaded, use it for the current session and set it as the default for future sessions.
This is the way I did it:
I just put
Intent intent = new Intent(Main.this, SOMECLASSNAME.class);
Main.this.startActivityForResult(intent, 0);
inside of the method that opens an activity, then inside of the method of SOMECLASSNAME that is designed to close the app I put:
setResult(0);
finish();
And I put the following in my Main class:
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if(resultCode == 0) {
finish();
}
}
You can use floating:
<div class="paragraphs">
<div class="row">
<div class="span4">
<img style="float:left" src="../site/img/success32.png"/>
<div class="content-heading"><h3>Experience   </h3></div>
<p style="clear:both">Donec id elit non mi porta gravida at eget metus. Etiam porta sem malesuada magna mollis euismod. Donec sed odio dui.</p>
</div>
</div>
</div>
If you want the following <p>
to stay at the same line too, remove its
style="clear:both"
but then you should add
<div style="clear:both"></div>
after it.
The below are the methods to convert a Integer to String in JS
The methods are arranged in the decreasing order of performance.
(The performance test results are given by @DarckBlezzer in his answer)
var num = 1
Method 1:
num = `${num}`
Method 2:
num = num + ''
Method 3:
num = String(num)
Method 4:
num = num.toString()
Note: You can't directly call toString()
on a number. 2.toString()
will throw Uncaught SyntaxError: Invalid or unexpected token
.
Another useful resource:
http://psoug.org/reference/roles.html
It might be worth writing your own tree wrapper based on an acyclic directed graph using the networkx library.
I had to spell and grammar check my comments. They had to be complete sentences, properly capitalized and finished with a period.
Use the title
attribute, for example:
<div title="them's hoverin' words">hover me</div>
_x000D_
or:
<span title="them's hoverin' words">hover me</span>
_x000D_
Update: This answer covers the general error classification. For a more specific answer about how to best handle the OP's exact query, please see other answers to this question
In MySQL, you can't modify the same table which you use in the SELECT part.
This behaviour is documented at:
http://dev.mysql.com/doc/refman/5.6/en/update.html
Maybe you can just join the table to itself
If the logic is simple enough to re-shape the query, lose the subquery and join the table to itself, employing appropriate selection criteria. This will cause MySQL to see the table as two different things, allowing destructive changes to go ahead.
UPDATE tbl AS a
INNER JOIN tbl AS b ON ....
SET a.col = b.col
Alternatively, try nesting the subquery deeper into a from clause ...
If you absolutely need the subquery, there's a workaround, but it's ugly for several reasons, including performance:
UPDATE tbl SET col = (
SELECT ... FROM (SELECT.... FROM) AS x);
The nested subquery in the FROM clause creates an implicit temporary table, so it doesn't count as the same table you're updating.
... but watch out for the query optimiser
However, beware that from MySQL 5.7.6 and onward, the optimiser may optimise out the subquery, and still give you the error. Luckily, the optimizer_switch
variable can be used to switch off this behaviour; although I couldn't recommend doing this as anything more than a short term fix, or for small one-off tasks.
SET optimizer_switch = 'derived_merge=off';
Thanks to Peter V. Mørch for this advice in the comments.
Example technique was from Baron Schwartz, originally published at Nabble, paraphrased and extended here.
You can do it so easy in Kotlin:
alert("Testing alerts") {
title = "Alert"
yesButton { toast("Yess!!!") }
noButton { }
}.show()
I found it easier to move the files into a separate Class Library project and then reference that project in the web project and apply the namespace in the using
section of the file.
For some reason the other solutions were not working for me, but this work around did.
axios.get
accepts a request config as the second parameter (not query string params).
You can use the params
config option to set query string params as follows:
axios.get('/api', {
params: {
foo: 'bar'
}
});
function SaveBlobAs(blob, file_name) {
if (typeof navigator.msSaveBlob == "function")
return navigator.msSaveBlob(blob, file_name);
var saver = document.createElementNS("http://www.w3.org/1999/xhtml", "a");
var blobURL = saver.href = URL.createObjectURL(blob),
body = document.body;
saver.download = file_name;
body.appendChild(saver);
saver.dispatchEvent(new MouseEvent("click"));
body.removeChild(saver);
URL.revokeObjectURL(blobURL);
}
This is sonxurxo's solution in Kotlin, if anyone needs it.
private fun getUnsafeOkHttpClient(): OkHttpClient {
// Create a trust manager that does not validate certificate chains
val trustAllCerts = arrayOf<TrustManager>(object : X509TrustManager {
override fun checkClientTrusted(chain: Array<out X509Certificate>?, authType: String?) {
}
override fun checkServerTrusted(chain: Array<out X509Certificate>?, authType: String?) {
}
override fun getAcceptedIssuers() = arrayOf<X509Certificate>()
})
// Install the all-trusting trust manager
val sslContext = SSLContext.getInstance("SSL")
sslContext.init(null, trustAllCerts, java.security.SecureRandom())
// Create an ssl socket factory with our all-trusting manager
val sslSocketFactory = sslContext.socketFactory
return OkHttpClient.Builder()
.sslSocketFactory(sslSocketFactory, trustAllCerts[0] as X509TrustManager)
.hostnameVerifier { _, _ -> true }.build()
}
I strongly advocate for PostGis. It's specific for that kind of datatype and it has out of the box methods to calculate distance between points, among other GIS operations that you can find useful in the future
your table:
q1 | q2 | q3 | q4 | q5
you can also do
ALTER TABLE yourtable ADD q6 VARCHAR( 255 ) after q5
SELECT * FROM Employees
WHERE rownum <= 3
ORDER BY Salary ;
add something like this in your layout between the views you want to separate:
<View
android:id="@+id/SplitLine_hor1"
android:layout_width="match_parent"
android:layout_height= "2dp"
android:background="@color/gray" />
Hope it helps :)
Full join in mysql :(left union right) or (right unoin left)
SELECT Persons.LastName, Persons.FirstName, Orders.OrderNo
FROM Persons
left JOIN Orders
ON Persons.P_Id=Orders.P_Id
ORDER BY Persons.LastName
Union
SELECT Persons.LastName, Persons.FirstName, Orders.OrderNo
FROM Persons
Right JOIN Orders
ON Persons.P_Id=Orders.P_Id
ORDER BY Persons.LastName
If you're having an issue where the Resources added are images and are not getting copied to your build folder on compiling. You need to change the "Build Action" to None from Resource ( which is the default) and change the Copy to "If Newer" or "Always" as shown below :
To use the fastboot command you first need to put your device in fastboot mode:
$ adb reboot bootloader
Once the device is in fastboot mode, you can boot it with your own kernel, for example:
$ fastboot boot myboot.img
The above will only boot your kernel once and the old kernel will be used again when you reboot the device. To replace the kernel on the device, you will need to flash it to the device:
$ fastboot flash boot myboot.img
Hope that helps.
Please click on "edit" -> then keyboard shortcuts. It`s straight forward from there. Just select the command from the list, and press the + button.
You will need to create a duplicate set, then select it again from the list. And finally set a keyboard shortcut!
Now, before saving, press the shortcut you just created!
I believe:
$("select option:first-child").attr("selected", "selected");
Dictionary<T1, Tuple<T2, T3>>
Edit: Sorry - I forgot you don't get Tuples until .NET 4.0 comes out. D'oh!
Search() can give a more simplified list of the attached packages in a session (i.e., without the detailed info given by sessionInfo())
search {base}- R Documentation
Description: Gives a list of attached packages. Search()
search()
#[1] ".GlobalEnv" "package:Rfacebook" "package:httpuv"
#"package:rjson"
#[5] "package:httr" "package:bindrcpp" "package:forcats" #
#"package:stringr"
#[9] "package:dplyr" "package:purrr" "package:readr"
#"package:tidyr"
#[13] "package:tibble" "package:ggplot2" "package:tidyverse"
#"tools:rstudio"
#[17] "package:stats" "package:graphics" "package:grDevices"
#"package:utils"
#[21] "package:datasets" "package:methods" "Autoloads"
#"package:base"
Rails-specific
In case someone only needs to call to_s
method to each of the values and is not using Rails 4.2 ( which includes transform_values
method link), you can do the following:
original_hash = { :a => 'a', :b => BigDecimal('23.4') }
#=> {:a=>"a", :b=>#<BigDecimal:5c03a00,'0.234E2',18(18)>}
JSON(original_hash.to_json)
#=> {"a"=>"a", "b"=>"23.4"}
Note: The use of 'json' library is required.
Note 2: This will turn keys into strings as well
Throwable.printStackTrace()
writes the stack trace to System.err
PrintStream. The System.err
stream and the underlying standard "error" output stream of the JVM process can be redirected by
System.setErr()
which changes the destination pointed to by System.err
./dev/null
.Inferring from the above, invoking Throwable.printStackTrace()
constitutes valid (not good/great) exception handling behavior, only
System.err
being reassigned throughout the duration of the application's lifetime,System.err
(and the JVM's standard error output stream).In most cases, the above conditions are not satisfied. One may not be aware of other code running in the JVM, and one cannot predict the size of the log file or the runtime duration of the process, and a well designed logging practice would revolve around writing "machine-parseable" log files (a preferable but optional feature in a logger) in a known destination, to aid in support.
Finally, one ought to remember that the output of Throwable.printStackTrace()
would definitely get interleaved with other content written to System.err
(and possibly even System.out
if both are redirected to the same file/device). This is an annoyance (for single-threaded apps) that one must deal with, for the data around exceptions is not easily parseable in such an event. Worse, it is highly likely that a multi-threaded application will produce very confusing logs as Throwable.printStackTrace()
is not thread-safe.
There is no synchronization mechanism to synchronize the writing of the stack trace to System.err
when multiple threads invoke Throwable.printStackTrace()
at the same time. Resolving this actually requires your code to synchronize on the monitor associated with System.err
(and also System.out
, if the destination file/device is the same), and that is rather heavy price to pay for log file sanity. To take an example, the ConsoleHandler
and StreamHandler
classes are responsible for appending log records to console, in the logging facility provided by java.util.logging
; the actual operation of publishing log records is synchronized - every thread that attempts to publish a log record must also acquire the lock on the monitor associated with the StreamHandler
instance. If you wish to have the same guarantee of having non-interleaved log records using System.out
/System.err
, you must ensure the same - the messages are published to these streams in a serializable manner.
Considering all of the above, and the very restricted scenarios in which Throwable.printStackTrace()
is actually useful, it often turns out that invoking it is a bad practice.
Extending the argument in the one of the previous paragraphs, it is also a poor choice to use Throwable.printStackTrace
in conjunction with a logger that writes to the console. This is in part, due to the reason that the logger would synchronize on a different monitor, while your application would (possibly, if you don't want interleaved log records) synchronize on a different monitor. The argument also holds good when you use two different loggers that write to the same destination, in your application.
This is the shortest version I could find,saving/hiding an extra conversion:
pil_image = PIL.Image.open('image.jpg')
opencvImage = cv2.cvtColor(numpy.array(pil_image), cv2.COLOR_RGB2BGR)
If reading a file from a URL:
import cStringIO
import urllib
file = cStringIO.StringIO(urllib.urlopen(r'http://stackoverflow.com/a_nice_image.jpg').read())
pil_image = PIL.Image.open(file)
opencvImage = cv2.cvtColor(numpy.array(pil_image), cv2.COLOR_RGB2BGR)
Instead of ng-options="product as product.label for product in products">
in the select element, you can even use this:
<option ng-repeat="product in products" value="{{product.label}}">{{product.label}}
which works just fine as well.
Wikipedia explains both reasonably well: UTF-8 vs Latin-1 (ISO-8859-1). Former is a variable-length encoding, latter single-byte fixed length encoding. Latin-1 encodes just the first 256 code points of the Unicode character set, whereas UTF-8 can be used to encode all code points. At physical encoding level, only codepoints 0 - 127 get encoded identically; code points 128 - 255 differ by becoming 2-byte sequence with UTF-8 whereas they are single bytes with Latin-1.
Again with getElementById, but instead .value, use .innerText
<td id="test">Chicken</td>
document.getElementById('test').innerText; //the value of this will be 'Chicken'