and doesnt give any clues

Yes it does, unfortunately your code is ignoring all of those clues. Take a look at your exception handler:

catch (OleDbException  ex)
{
    MessageBox.Show(ex.Source);
    conn.Close();
}

All you're examining is the source of the exception. Which, in this case, is "Microsoft Access Database Engine". You're not examining the error message itself, or the stack trace, or any inner exception, or anything useful about the exception.

Don't ignore the exception, it contains information about what went wrong and why.

There are various logging tools out there (NLog, log4net, etc.) which can help you log useful information about an exception. Failing that, you should at least capture the exception message, stack trace, and any inner exception(s). Currently you're ignoring the error, which is why you're not able to solve the error.

In your debugger, place a breakpoint inside the catch block and examine the details of the exception. You'll find it contains a lot of information.

The first problem encountered with your code is the message

Local variable OrdersPerHour might not be initialized before accessing.

It happens because in the case where your database query would throw an exception, the value might not be set to something (you have an empty catch clause).

To fix this, set the value to what you'd want to have if the query fails, which is probably 0 :

int? OrdersPerHour = 0;

Once this is fixed, now there's the error you're posting about. This happens because your method signature declares you are returning an int, but you are in fact returning a nullable int, int?, variable.

So to get the int part of your int?, you can use the .Value property:

return OrdersPerHour.Value;

However, if you declared your OrdersPerHour to be null at start instead of 0, the value can be null so a proper validation before returning is probably needed (Throw a more specific exception, for example).

To do so, you can use the HasValue property to be sure you're having a value before returning it:

if (OrdersPerHour.HasValue){
    return OrdersPerHour.Value;
}
else{
    // Handle the case here
}

As a side note, since you're coding in C# it would be better if you followed C#'s conventions. Your parameter and variables should be in camelCase, not PascalCase. So User and OrdersPerHour would be user and ordersPerHour.

You can use formControlName only on directives which implement ControlValueAccessor.

Implement the interface

So, in order to do what you want, you have to create a component which implements ControlValueAccessor, which means implementing the following three functions:

• writeValue (tells Angular how to write value from model into view)
• registerOnChange (registers a handler function that is called when the view changes)
• registerOnTouched (registers a handler to be called when the component receives a touch event, useful for knowing if the component has been focused).

Register a provider

Then, you have to tell Angular that this directive is a ControlValueAccessor (interface is not gonna cut it since it is stripped from the code when TypeScript is compiled to JavaScript). You do this by registering a provider.

The provider should provide NG_VALUE_ACCESSOR and use an existing value. You'll also need a forwardRef here. Note that NG_VALUE_ACCESSOR should be a multi provider.

For example, if your custom directive is named MyControlComponent, you should add something along the following lines inside the object passed to @Component decorator:

providers: [
  { 
    provide: NG_VALUE_ACCESSOR,
    multi: true,
    useExisting: forwardRef(() => MyControlComponent),
  }
]

Usage

Your component is ready to be used. With template-driven forms, ngModel binding will now work properly.

With reactive forms, you can now properly use formControlName and the form control will behave as expected.

Resources

• Custom Form Controls in Angular by Thoughtram
• Angular Custom Form Controls with Reactive Forms and NgModel by Cory Rylan

you must changes in $watch ....

function MyController($scope) {_x000D_
    $scope.form = {_x000D_
        name: 'my name',_x000D_
    }_x000D_
_x000D_
    $scope.$watch('form.name', function(newVal, oldVal){_x000D_
        console.log('changed');_x000D_
     _x000D_
    });_x000D_
}

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.22/angular.min.js"></script>_x000D_
<div ng-app>_x000D_
    <div ng-controller="MyController">_x000D_
        <label>Name:</label> <input type="text" ng-model="form.name"/>_x000D_
            _x000D_
        <pre>_x000D_
            {{ form }}_x000D_
        </pre>_x000D_
    </div>_x000D_
</div>

I have encountered a specific case from my side with 10^11 rows in my dataframe, and in this case none of the proposed solution is appropriate. I have used categories, and this should work fine in all cases when the number of unique string is not too large. This is easily done in the R software with XxY with factors but I could not find any other way to do it in python (I'm new to python). If anyone knows a place where this is implemented I'd be glad to know.

def Create_Interaction_var(df,Varnames):
    '''
    :df data frame
    :list of 2 column names, say "X" and "Y". 
    The two columns should be strings or categories
    convert strings columns to categories
    Add a column with the "interaction of X and Y" : X x Y, with name 
    "Interaction-X_Y"
    '''
    df.loc[:, Varnames[0]] = df.loc[:, Varnames[0]].astype("category")
    df.loc[:, Varnames[1]] = df.loc[:, Varnames[1]].astype("category")
    CatVar = "Interaction-" + "-".join(Varnames)
    Var0Levels = pd.DataFrame(enumerate(df.loc[:,Varnames[0]].cat.categories)).rename(columns={0 : "code0",1 : "name0"})
    Var1Levels = pd.DataFrame(enumerate(df.loc[:,Varnames[1]].cat.categories)).rename(columns={0 : "code1",1 : "name1"})
    NbLevels=len(Var0Levels)

    names = pd.DataFrame(list(itertools.product(dict(enumerate(df.loc[:,Varnames[0]].cat.categories)),
                                                dict(enumerate(df.loc[:,Varnames[1]].cat.categories)))),
                         columns=['code0', 'code1']).merge(Var0Levels,on="code0").merge(Var1Levels,on="code1")
    names=names.assign(Interaction=[str(x) + '_' + y for x, y in zip(names["name0"], names["name1"])])
    names["code01"]=names["code0"] + NbLevels*names["code1"]
    df.loc[:,CatVar]=df.loc[:,Varnames[0]].cat.codes+NbLevels*df.loc[:,Varnames[1]].cat.codes
    df.loc[:, CatVar]=  df[[CatVar]].replace(names.set_index("code01")[["Interaction"]].to_dict()['Interaction'])[CatVar]
    df.loc[:, CatVar] = df.loc[:, CatVar].astype("category")
    return df

ConfigurationManager.AppSettings returns the settings defined for the application, not for the specific DLL, you can access them but it's the application settings that will be returned.

If you're using you dll from another application then the ConnectionString shall be in the app.settings of the application.

For Bootstrap:

<div class="navbar-fixed-bottom row-fluid">
  <div class="navbar-inner">
    <div class="container">
      Text
    </div>
  </div>
</div>

Here is a great discussion about lazy evaluation and deferred execution. Basically you have to materialize the list to get that value.

Necromancing.
For those that still have to maintain .NET 2.0, or those that want to do it without LINQ:

public static object GetAttribute(System.Reflection.MemberInfo mi, System.Type t)
{
    object[] objs = mi.GetCustomAttributes(t, true);

    if (objs == null || objs.Length < 1)
        return null;

    return objs[0];
}



public static T GetAttribute<T>(System.Reflection.MemberInfo mi)
{
    return (T)GetAttribute(mi, typeof(T));
}


public delegate TResult GetValue_t<in T, out TResult>(T arg1);

public static TValue GetAttributValue<TAttribute, TValue>(System.Reflection.MemberInfo mi, GetValue_t<TAttribute, TValue> value) where TAttribute : System.Attribute
{
    TAttribute[] objAtts = (TAttribute[])mi.GetCustomAttributes(typeof(TAttribute), true);
    TAttribute att = (objAtts == null || objAtts.Length < 1) ? default(TAttribute) : objAtts[0];
    // TAttribute att = (TAttribute)GetAttribute(mi, typeof(TAttribute));

    if (att != null)
    {
        return value(att);
    }
    return default(TValue);
}

Example usage:

System.Reflection.FieldInfo fi = t.GetField("PrintBackground");
wkHtmlOptionNameAttribute att = GetAttribute<wkHtmlOptionNameAttribute>(fi);
string name = GetAttributValue<wkHtmlOptionNameAttribute, string>(fi, delegate(wkHtmlOptionNameAttribute a){ return a.Name;});

or simply

string aname = GetAttributValue<wkHtmlOptionNameAttribute, string>(fi, a => a.Name );

array_pop(explode("/", "http://vimeo.com/1234567")); will return the last element of the example url

No, you can specify the list as a keyword argument to your function.

alist = []
def fn(alist=alist):
    alist.append(1)
fn()
print alist    # [1]

I'd say it's bad practice though. Kind of too hackish. If you really need to use a globally available singleton-like data structure, I'd use the module level variable approach, i.e. put 'alist' in a module and then in your other modules import that variable:

In file foomodule.py:

alist = []

In file barmodule.py:

import foomodule
def fn():
    foomodule.alist.append(1)
print foomodule.alist    # [1]

You should be able to use filter: orderBy

orderBy can accept a third option for the reverse flag.

<select ng-option="item.name for item in items | orderBy:'name':true"></select>

Here item is sorted by 'name' property in a reversed order. The 2nd argument can be any order function, so you can sort in any rule.

@see http://docs.angularjs.org/api/ng.filter:orderBy

Jquery Touch Punch is great but what it also does is disable all the controls on the draggable div so to prevent this you have to alter the lines... (at the time of writing - line 75)

change

if (touchHandled || !self._mouseCapture(event.originalEvent.changedTouches[0])){

to read

if (touchHandled || !self._mouseCapture(event.originalEvent.changedTouches[0]) || event.originalEvent.target.localName === 'textarea'
        || event.originalEvent.target.localName === 'input' || event.originalEvent.target.localName === 'button' || event.originalEvent.target.localName === 'li'
        || event.originalEvent.target.localName === 'a'
        || event.originalEvent.target.localName === 'select' || event.originalEvent.target.localName === 'img') {

add as many ors as you want for each of the elements you want to 'unlock'

Hope that helps someone

ipconfig /renew - solved this issue for me.

<xsl:variable name="count" select="count(/Property/long = $parPropId)"/>

Un-tested but I think that should work. I'm assuming the Property nodes are direct children of the root node and therefor taking out your descendant selector for peformance

You can use such trick:

myObject = new ArrayList<Object>(myTempObject);

or use

myObject = (ArrayList<Object>)myTempObject.clone();

You can get some information about clone() method here

But you should remember, that all these ways will give you a copy of your List, not all of its elements. So if you change one of the elements in your copied List, it will also be changed in your original List.

You could use the Merge Functionality to achieve. Otherwise you can do:

declare @rowCount int

select @rowCount=@@RowCount

if @rowCount=0
begin
--insert....

if you delete something from list , u can use this way : (method sub is case sensitive)

new_list = []
old_list= ["ABCDEFG","HKLMNOP","QRSTUV"]

for data in old_list:
     new_list.append(re.sub("AB|M|TV", " ", data))

print(new_list) // output : [' CDEFG', 'HKL NOP', 'QRSTUV']

I love schemaspy for schema visualisations. Look at the sample output they provide, and drool. Note the tabs!

You'll need to download the JDBC driver here, then your command should look something like:

java -jar schemaspy-6.0.0-rc2.jar -t pgsql -db database_name -host myhost -u username -p password -o ./schemaspy -dp postgresql-9.3-1100.jdbc3.jar -s public -noads

Sometimes using options -port will not working if your database has diferrent port, so you have to add manual port after host parameter, for example:

java -jar schemaspy-6.0.0-rc2.jar -t pgsql -db database_name -host myhost:myport -u username -p password -o ./schemaspy -dp postgresql-9.3-1100.jdbc3.jar -s public -noads

You'll need to install graphviz as well if you want graphics (apt-get install graphviz for debian based distros).

Currently there is no way to apply a css to get your desired result . Why not use libraries like choosen or select2 . These allow you to style the way you want.

If you don want to use third party libraries then you can make a simple un-ordered list and play with some css.Here is thread you could follow

How to convert <select> dropdown into an unordered list using jquery?

Use a loop

for(var i = 0; i < obj.length; ++i){
   //do something with obj[i]
   for(var ind in obj[i]) {
        console.log(ind);
        for(var vals in obj[i][ind]){
            console.log(vals, obj[i][ind][vals]);
        }
   }
}

Demo: http://jsfiddle.net/maniator/pngmL/

It also changes what pydoc will show:

module1.py

a = "A"
b = "B"
c = "C"

module2.py

__all__ = ['a', 'b']

a = "A"
b = "B"
c = "C"

$ pydoc module1

Help on module module1:

NAME
    module1

FILE
    module1.py

DATA
    a = 'A'
    b = 'B'
    c = 'C'

$ pydoc module2

Help on module module2:

NAME
    module2

FILE
    module2.py

DATA
    __all__ = ['a', 'b']
    a = 'A'
    b = 'B'

I declare __all__ in all my modules, as well as underscore internal details, these really help when using things you've never used before in live interpreter sessions.

You can use this command: ECHO >> filename.txt

it will create a file with the given extension in the current folder.

UPDATE:

for an empty file use: copy NUL filename.txt

The difference between pointers and references is quite simple: a pointer can be null, a reference can not.

Examine your API, if it makes sense for null to be able to be returned, possibly to indicate an error, use a pointer, otherwise use a reference. If you do use a pointer, you should add checks to see if it's null (and such checks may slow down your code).

Here it looks like references are more appropriate.

You can use the target argument in the Thread constructor to directly pass in a function that gets called instead of run.

preg_match('/'.preg_quote('^\'£$%^&*()}{@#~?><,@|-=-_+-¬', '/').'/', $string);

Try

$sqlupdate1 = "UPDATE table SET commodity_quantity=$qty WHERE user={$rows['user']} ";

You need curly brackets for array access in double quoted strings.

I had same issue. I have tried many things but nothing worked Until I try following:

1. Close Android Studio
2. Delete any directory matching gradle-[version]-all within C:\Users\<username>\.gradle\wrapper\dists\. If you encounter a "File in use" error (or similar), terminate any running Java executables.
3. Open Android Studio as Administrator.
4. Try to sync project files.
5. If the above does not work, try restarting your computer and/or delete the project's .gradle directory.
6. Open the problem project and trigger a Gradle sync.

This code works perfectly from Spark 2.x with Scala 2.11

Import necessary classes

import org.apache.spark.sql.{Row, SparkSession}
import org.apache.spark.sql.types.{DoubleType, StringType, StructField, StructType}

Create SparkSession Object, and Here it's spark

val spark: SparkSession = SparkSession.builder.master("local").getOrCreate
val sc = spark.sparkContext // Just used to create test RDDs

Let's an RDD to make it DataFrame

val rdd = sc.parallelize(
  Seq(
    ("first", Array(2.0, 1.0, 2.1, 5.4)),
    ("test", Array(1.5, 0.5, 0.9, 3.7)),
    ("choose", Array(8.0, 2.9, 9.1, 2.5))
  )
)

Method 1

Using SparkSession.createDataFrame(RDD obj).

val dfWithoutSchema = spark.createDataFrame(rdd)

dfWithoutSchema.show()
+------+--------------------+
|    _1|                  _2|
+------+--------------------+
| first|[2.0, 1.0, 2.1, 5.4]|
|  test|[1.5, 0.5, 0.9, 3.7]|
|choose|[8.0, 2.9, 9.1, 2.5]|
+------+--------------------+

Method 2

Using SparkSession.createDataFrame(RDD obj) and specifying column names.

val dfWithSchema = spark.createDataFrame(rdd).toDF("id", "vals")

dfWithSchema.show()
+------+--------------------+
|    id|                vals|
+------+--------------------+
| first|[2.0, 1.0, 2.1, 5.4]|
|  test|[1.5, 0.5, 0.9, 3.7]|
|choose|[8.0, 2.9, 9.1, 2.5]|
+------+--------------------+

Method 3 (Actual answer to the question)

This way requires the input rdd should be of type RDD[Row].

val rowsRdd: RDD[Row] = sc.parallelize(
  Seq(
    Row("first", 2.0, 7.0),
    Row("second", 3.5, 2.5),
    Row("third", 7.0, 5.9)
  )
)

create the schema

val schema = new StructType()
  .add(StructField("id", StringType, true))
  .add(StructField("val1", DoubleType, true))
  .add(StructField("val2", DoubleType, true))

Now apply both rowsRdd and schema to createDataFrame()

val df = spark.createDataFrame(rowsRdd, schema)

df.show()
+------+----+----+
|    id|val1|val2|
+------+----+----+
| first| 2.0| 7.0|
|second| 3.5| 2.5|
| third| 7.0| 5.9|
+------+----+----+

You can first find the position of the string in this case ":"

'position = InStr(StringToSearch, StringToFind)
position = InStr(StringToSearch, ":")

Then use Left(StringToCut, NumberOfCharacterToCut)

Result = Left(StringToSearch, position -1)

I've found the following method to be the most reliable when dealing with edge cases that trip up offsetTop/offsetLeft.

function getPosition(element) {
    var clientRect = element.getBoundingClientRect();
    return {left: clientRect.left + document.body.scrollLeft,
            top: clientRect.top + document.body.scrollTop};
}

This is a very useful method that returns "true" if the Location services are enabled:

public static boolean locationServicesEnabled(Context context) {
        LocationManager lm = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
        boolean gps_enabled = false;
        boolean net_enabled = false;

        try {
            gps_enabled = lm.isProviderEnabled(LocationManager.GPS_PROVIDER);
        } catch (Exception ex) {
            Log.e(TAG,"Exception gps_enabled");
        }

        try {
            net_enabled = lm.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
        } catch (Exception ex) {
            Log.e(TAG,"Exception network_enabled");
        }
        return gps_enabled || net_enabled;
}

Here's a mixin that you can mix into any model class which gives each instance an update method:

class UpdateMixin(object):
    def update(self, **kwargs):
        if self._state.adding:
            raise self.DoesNotExist
        for field, value in kwargs.items():
            setattr(self, field, value)
        self.save(update_fields=kwargs.keys())

The self._state.adding check checks to see if the model is saved to the database, and if not, raises an error.

(Note: This update method is for when you want to update a model and you know the instance is already saved to the database, directly answering the original question. The built-in update_or_create method featured in Platinum Azure's answer already covers the other use-case.)

You would use it like this (after mixing this into your user model):

user = request.user
user.update(favorite_food="ramen")

Besides having a nicer API, another advantage to this approach is that it calls the pre_save and post_save hooks, while still avoiding atomicity issues if another process is updating the same model.

For my particular version of this problem, I went ahead and searched the function declaration of load_json_file(path) within the packaging.py file, then smuggled a print line into it:

def load_json_file(path):
    data = open(path, 'r').read()
    print data
    try:
        return Bunch(json.loads(data))
    except ValueError, e:
        raise MalformedJsonFileError('%s when reading "%s"' % (str(e),
                                                               path))

That way it would print the content of the json file before entering the try-catch, and that way – even with my barely existing Python knowledge – I was able to quickly figure out why my configuration couldn't read the json file.
(It was because I had set up my text editor to write a UTF-8 BOM … stupid)

Just mentioning this because, while maybe not a good answer to the OP's specific problem, this was a rather quick method in determining the source of a very oppressing bug. And I bet that many people will stumble upon this article who are searching a more verbose solution for a MalformedJsonFileError: No JSON object could be decoded when reading …. So that might help them.

Here are some supplemental examples to see the raw text that Postman passes in the request. You can see this by opening the Postman console:

form-data

Header

content-type: multipart/form-data; boundary=--------------------------590299136414163472038474

Body

key1=value1key2=value2

x-www-form-urlencoded

Header

Content-Type: application/x-www-form-urlencoded

Body

key1=value1&key2=value2

Raw text/plain

Header

Content-Type: text/plain

Body

This is some text.

Raw json

Header

Content-Type: application/json

Body

{"key1":"value1","key2":"value2"}

Yes, c[i]='' is not a valid code. We parenthesis character constant between ' ', e.g. c[i] = 'A'; char A. but you don't write any char in between ''.

Empty space is nothing but suppose if you wants to assigned space then do:

c[i] = ' ';
//      ^  space 

if wants to assigned nul char then do:

c[i] = '\0';
//       ^ null symbol 

Example: Suppose if c[] a string (nul \0 terminated char array) if you having a string. for example:

char c[10] = {'a', '2', 'c', '\0'};

And you replace second char with space:

c[1] = ' ';

and if you print it using printf as follows:

printf("\n c: %s", c);

then output would be:

  c:  a  c
//      ^ space printed 

And you replace second char with '\0':

c[1] = '\0';

then output would be:

  c:  a

because string terminated with \0.

You could use the add method and pass it a negative number. However, you could also write a simpler method that doesn't use the Calendar class such as the following

public static void addDays(Date d, int days)
{
    d.setTime( d.getTime() + (long)days*1000*60*60*24 );
}

This gets the timestamp value of the date (milliseconds since the epoch) and adds the proper number of milliseconds. You could pass a negative integer for the days parameter to do subtraction. This would be simpler than the "proper" calendar solution:

public static void addDays(Date d, int days)
{
    Calendar c = Calendar.getInstance();
    c.setTime(d);
    c.add(Calendar.DATE, days);
    d.setTime( c.getTime().getTime() );
}

Note that both of these solutions change the Date object passed as a parameter rather than returning a completely new Date. Either function could be easily changed to do it the other way if desired.

You can override any checks that git does by using "force push". Use this command in terminal

git push -f origin master

However, you will potentially ignore the existing work that is in remote - you are effectively rewriting the remote's history to be exactly like your local copy.

You want hasOwnProperty():

var myObj1 = { _x000D_
 prop1: 'no',_x000D_
 prop2: function () { return false; }_x000D_
}_x000D_
var myObj2 = { _x000D_
 prop1: 'no'_x000D_
}_x000D_
_x000D_
console.log(myObj1.hasOwnProperty('prop2')); // returns true_x000D_
console.log(myObj2.hasOwnProperty('prop2')); // returns false_x000D_
 

References: Mozilla, Microsoft, phrogz.net.

UPDATE: Small one-liner function using the ES2017 String.prototype.padStart method:

const zeroPad = (num, places) => String(num).padStart(places, '0')_x000D_
_x000D_
console.log(zeroPad(5, 2)); // "05"_x000D_
console.log(zeroPad(5, 4)); // "0005"_x000D_
console.log(zeroPad(5, 6)); // "000005"_x000D_
console.log(zeroPad(1234, 2)); // "1234"

Another ES5 approach:

function zeroPad(num, places) {
  var zero = places - num.toString().length + 1;
  return Array(+(zero > 0 && zero)).join("0") + num;
}

zeroPad(5, 2); // "05"
zeroPad(5, 4); // "0005"
zeroPad(5, 6); // "000005"
zeroPad(1234, 2); // "1234" :)

Is there a standard sign function (signum, sgn) in C/C++?

Yes, depending on definition.

C99 and later has the signbit() macro in <math.h>

int signbit(real-floating x);
The signbit macro returns a nonzero value if and only if the sign of its argument value is negative. C11 §7.12.3.6

Yet OP wants something a little different.

I want a function that returns -1 for negative numbers and +1 for positive numbers. ... a function working on floats.

#define signbit_p1_or_n1(x)  ((signbit(x) ?  -1 : 1)

Deeper:

The post is not specific in the following cases: x = 0.0, -0.0, +NaN, -NaN.

A classic signum() returns +1 on x>0, -1 on x<0 and 0 on x==0.

Many answers have already covered that, but do not address x = -0.0, +NaN, -NaN. Many are geared for an integer point-of-view that usually lacks Not-a-Numbers (NaN) and -0.0.

Typical answers function like signnum_typical() On -0.0, +NaN, -NaN, they return 0.0, 0.0, 0.0.

int signnum_typical(double x) {
  if (x > 0.0) return 1;
  if (x < 0.0) return -1;
  return 0;
}

Instead, I propose this functionality: On -0.0, +NaN, -NaN, it returns -0.0, +NaN, -NaN.

double signnum_c(double x) {
  if (x > 0.0) return 1.0;
  if (x < 0.0) return -1.0;
  return x;
}

By full precision, I assume mean enough precision to show the best approximation to the intended value, but it should be pointed out that double is stored using base 2 representation and base 2 can't represent something as trivial as 1.1 exactly. The only way to get the full-full precision of the actual double (with NO ROUND OFF ERROR) is to print out the binary bits (or hex nybbles).

One way of doing that is using a union to type-pun the double to a integer and then printing the integer, since integers do not suffer from truncation or round-off issues. (Type punning like this is not supported by the C++ standard, but it is supported in C. However, most C++ compilers will probably print out the correct value anyways. I think g++ supports this.)

union {
    double d;
    uint64_t u64;
} x;
x.d = 1.1;
std::cout << std::hex << x.u64;

This will give you the 100% accurate precision of the double... and be utterly unreadable because humans can't read IEEE double format ! Wikipedia has a good write up on how to interpret the binary bits.

In newer C++, you can do

std::cout << std::hexfloat << 1.1;

Use array_multisort(), array_map()

array_multisort(array_map(function($element) {
      return $element['order'];
  }, $array), SORT_ASC, $array);

print_r($array);

DEMO

This may also help:

SELECT convert(varchar, getdate(), 100) -- mon dd yyyy hh:mmAM (or PM)
                                        -- Oct  2 2008 11:01AM
SELECT convert(varchar, getdate(), 101) -- mm/dd/yyyy - 10/02/2008                  
SELECT convert(varchar, getdate(), 102) -- yyyy.mm.dd – 2008.10.02           
SELECT convert(varchar, getdate(), 103) -- dd/mm/yyyy
SELECT convert(varchar, getdate(), 104) -- dd.mm.yyyy
SELECT convert(varchar, getdate(), 105) -- dd-mm-yyyy
SELECT convert(varchar, getdate(), 106) -- dd mon yyyy
SELECT convert(varchar, getdate(), 107) -- mon dd, yyyy
SELECT convert(varchar, getdate(), 108) --  hh:mm:ss
SELECT convert(varchar, getdate(), 109) -- mon dd yyyy hh:mm:ss:mmmAM (or PM)
                                        -- Oct  2 2008 11:02:44:013AM   
SELECT convert(varchar, getdate(), 110) -- mm-dd-yyyy
SELECT convert(varchar, getdate(), 111) -- yyyy/mm/dd
SELECT convert(varchar, getdate(), 112) -- yyyymmdd
SELECT convert(varchar, getdate(), 113) -- dd mon yyyy hh:mm:ss:mmm
                                        --  02 Oct 2008 11:02:07:577     
SELECT convert(varchar, getdate(), 114) -- hh:mm:ss:mmm(24h)
SELECT convert(varchar, getdate(), 120) -- yyyy-mm-dd hh:mm:ss(24h)
SELECT convert(varchar, getdate(), 121) --  yyyy-mm-dd hh:mm:ss.mmm
SELECT convert(varchar, getdate(), 126) -- yyyy-mm-ddThh:mm:ss.mmm
                                        --  2008-10-02T10:52:47.513
-- SQL create different date styles with t-sql string functions
SELECT replace(convert(varchar, getdate(), 111), '/', ' ') -- yyyy mm dd
SELECT convert(varchar(7), getdate(), 126)                 -- yyyy-mm
SELECT right(convert(varchar, getdate(), 106), 8)          -- mon yyyy

The Source

Performance

Today 2020.09.17 I perform tests on MacOs HighSierra 10.13.6 on Chrome v85, Safari v13.1.2 and Firefox v80 for chosen solutions.

Results

For all browsers (and both test cases)

• solutions typeof||instanceof (A, I) and x===x+'' (H) are fast/fastest
• solution _.isString (lodash lib) is medium/fast
• solutions B and K are slowest

Update: 2020.11.28 I update results for x=123 Chrome column - for solution I there was probably an error value before (=69M too low) - I use Chrome 86.0 to repeat tests.

Details

I perform 2 tests cases for solutions A B C D E F G H I J K L

• when variable is string - you can run it HERE
• when variable is NOT string - you can run it HERE

Below snippet presents differences between solutions

// https://stackoverflow.com/a/9436948/860099
function A(x) {
  return (typeof x == 'string') || (x instanceof String)
}

// https://stackoverflow.com/a/17772086/860099
function B(x) {
  return Object.prototype.toString.call(x) === "[object String]"
}

// https://stackoverflow.com/a/20958909/860099
function C(x) {
  return _.isString(x);
}

// https://stackoverflow.com/a/20958909/860099
function D(x) {
  return $.type(x) === "string";
}

// https://stackoverflow.com/a/16215800/860099
function E(x) {
  return x?.constructor === String;
}

// https://stackoverflow.com/a/42493631/860099
function F(x){
  return x?.charAt != null
}


// https://stackoverflow.com/a/57443488/860099
function G(x){
  return String(x) === x
}

// https://stackoverflow.com/a/19057360/860099
function H(x){
  return x === x + ''
}

// https://stackoverflow.com/a/4059166/860099
function I(x) {
  return typeof x == 'string'
}

// https://stackoverflow.com/a/28722301/860099
function J(x){
  return x === x?.toString()
}

// https://stackoverflow.com/a/58892465/860099
function K(x){
  return x && typeof x.valueOf() === "string"
}

// https://stackoverflow.com/a/9436948/860099
function L(x) {
  return x instanceof String
}

// ------------------
//     PRESENTATION
// ------------------

console.log('Solutions results for different inputs \n\n');
console.log("'abc' Str  ''  ' ' '1' '0'  1   0   {} [] true false null undef");

let tests = [ 'abc', new String("abc"),'',' ','1','0',1,0,{},[],true,false,null,undefined];

[A,B,C,D,E,F,G,H,I,J,K,L].map(f=> {  
console.log(
  `${f.name}   ` + tests.map(v=> (1*!!f(v)) ).join`   `
)})

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.20/lodash.min.js" integrity="sha512-90vH1Z83AJY9DmlWa8WkjkV79yfS2n2Oxhsi2dZbIv0nC4E6m5AbH8Nh156kkM7JePmqD6tcZsfad1ueoaovww==" crossorigin="anonymous"></script>


This shippet only presents functions used in performance tests - it not perform tests itself!

And here are example results for chrome

Add the below line in your app.gradle file before depencencies block.

configurations.all {
    resolutionStrategy {
        force 'com.android.support:support-annotations:26.1.0'
    }
}

There's also screenshot below for a better understanding.

2. the configurations.all block will only be helpful if you want your target sdk to be 26. If you can change it to 27 the error will be gone without adding the configuration block in app.gradle file.

3. There is one more way if you would remove all the test implementation from app.gradle file it would resolve the error and in this also you dont need to add the configuration block nor you need to change the targetsdk version.

Hope that helps.

SELECCT TO_BASE64(blobfield)  
FROM the Table

worked for me.

The CAST(blobfield AS CHAR(10000) CHARACTER SET utf8) and CAST(blobfield AS CHAR(10000) CHARACTER SET utf16) did not show me the text value I wanted to get.

I have this issue today with mat-option-group. The thing which solved me the problem is using in other provided event of mat-select : valueChange

I put here a little code for understanding :

<mat-form-field >
  <mat-label>Filter By</mat-label>
  <mat-select  panelClass="" #choosedValue (valueChange)="doSomething1(choosedValue.value)"> <!-- (valueChange)="doSomething1(choosedValue.value)" instead of (change) or other event-->

    <mat-option >-- None --</mat-option>
      <mat-optgroup  *ngFor="let group of filterData" [label]="group.viewValue"
                    style = "background-color: #0c5460">
        <mat-option *ngFor="let option of group.options" [value]="option.value">
          {{option.viewValue}}
        </mat-option>
      </mat-optgroup>
  </mat-select>
</mat-form-field>

Mat Version:

"@angular/material": "^6.4.7",

Offering the curl package as an alternative that I found to be reliable when extracting large files from an online database. In a recent project, I had to download 120 files from an online database and found it to half the transfer times and to be much more reliable than download.file.

#install.packages("curl")
library(curl)
#install.packages("RCurl")
library(RCurl)

ptm <- proc.time()
URL <- "https://d396qusza40orc.cloudfront.net/getdata%2Fdata%2Fss06hid.csv"
x <- getURL(URL)
proc.time() - ptm
ptm

ptm1 <- proc.time()
curl_download(url =URL ,destfile="TEST.CSV",quiet=FALSE, mode="wb")
proc.time() - ptm1
ptm1

ptm2 <- proc.time()
y = download.file(URL, destfile = "./data/data.csv", method="curl")
proc.time() - ptm2
ptm2

In this case, rough timing on your URL showed no consistent difference in transfer times. In my application, using curl_download in a script to select and download 120 files from a website decreased my transfer times from 2000 seconds per file to 1000 seconds and increased the reliability from 50% to 2 failures in 120 files. The script is posted in my answer to a question I asked earlier, see .

I updated your question with the code snippet. After proper indenting, it is immediately clear what the problem is: you use File.Create() but don't close the FileStream that it returns.

Doing it that way is unnecessary, StreamWriter already allows appending to an existing file and creating a new file if it doesn't yet exist. Like this:

  string filePath = string.Format(@"{0}\M{1}.dat", ConfigurationManager.AppSettings["DirectoryPath"], costCentre); 
  using (StreamWriter sw = new StreamWriter(filePath, true)) {
    //write my text 
  }

Which uses this StreamWriter constructor.

You can use scalar multiplication to modify each element in your vector.

> r <- 0:10 
> r <- r * 2
> r 
 [1]  0  2  4  6  8 10 12 14 16 18 20

or

> r <- 0:10 * 2 
> r 
 [1]  0  2  4  6  8 10 12 14 16 18 20

The macro NDEBUG controls whether assert() statements are active or not.

In my view, that is separate from any other debugging - so I use something other than NDEBUG to control debugging information in the program. What I use varies, depending on the framework I'm working with; different systems have different enabling macros, and I use whatever is appropriate.

If there is no framework, I'd use a name without a leading underscore; those tend to be reserved to 'the implementation' and I try to avoid problems with name collisions - doubly so when the name is a macro.

You can configure patterns to hide files and folders from the explorer and searches.

1. Open VS User Settings (Main menu: File > Preferences > Settings). This will open the setting screen.

2. Search for files:exclude in the search at the top.

3. Configure the User Setting with new glob patterns as needed. In this case, add this pattern node_modules/ then click OK. The pattern syntax is powerful. You can find pattern matching details under the Search Across Files topic.

   {
      "files.exclude": {
       ".vscode":true,
       "node_modules/":true,
       "dist/":true,
       "e2e/":true,
       "*.json": true,
       "**/*.md": true,
       ".gitignore": true,
       "**/.gitkeep":true,
       ".editorconfig": true,
       "**/polyfills.ts": true,
       "**/main.ts": true,
       "**/tsconfig.app.json": true,
       "**/tsconfig.spec.json": true,
       "**/tslint.json": true,
       "**/karma.conf.js": true,
       "**/favicon.ico": true,
       "**/browserslist": true,
       "**/test.ts": true,
       "**/*.pyc": true,
       "**/__pycache__/": true
     }
   }
   

EDIT: I noticed a few downvotes and took another look at this Q&A. Most people seem to miss that the OP asked for fields to be dynamically selected based on the caller-provided list of fields. You can't do this with the statically-defined json struct tag.

If what you want is to always skip a field to json-encode, then of course use json:"-" to ignore the field (also note that this is not required if your field is unexported - those fields are always ignored by the json encoder). But that is not the OP's question.

To quote the comment on the json:"-" answer:

This [the json:"-" answer] is the answer most people ending up here from searching would want, but it's not the answer to the question.

I'd use a map[string]interface{} instead of a struct in this case. You can easily remove fields by calling the delete built-in on the map for the fields to remove.

That is, if you can't query only for the requested fields in the first place.

in may case setting SMTPAuth to true fixed it. Of-course you need to set permissions for "Less secure apps" to Enabled.

$mail->SMTPAuth = true;

The shortest solution that will work with any Java version:

<profiles>
    <profile>
        <id>disable-java8-doclint</id>
        <activation>
            <jdk>[1.8,)</jdk>
        </activation>
        <properties>
            <additionalparam>-Xdoclint:none</additionalparam>
        </properties>
    </profile>
</profiles>

Just add that to your POM and you're good to go.

This is basically @ankon's answer plus @zapp's answer.

For maven-javadoc-plugin 3.0.0 users:

Replace

<additionalparam>-Xdoclint:none</additionalparam>

by

<doclint>none</doclint>

In Log4j 2, you can use Logger.catching() to log a stacktrace from an exception that was caught.

    try {
        String msg = messages[messages.length];
        logger.error("An exception should have been thrown");
    } catch (Exception ex) {
        logger.catching(ex);
    }

If you are Archiving for iOS7 and Xcode5 and got these errors, please refer to this link. It seems like Apple is dropping an architecture that cocoa pods needed https://github.com/CocoaPods/CocoaPods/pull/1352

YouTubes HTML5 embed code:

<iframe width="560" height="315" src="http://www.youtube.com/embed/GRonxog5mbw?autoplay=1&loop=1&playlist=GRonxog5mbw" frameborder="0" allowfullscreen></iframe>?

You can read about it here: ... (EDIT Link died.) ... View original content on Internet Archive project.

http://web.archive.org/web/20121016180134/http://brianwong.com/blog/2012-youtube-embed-code-autoplay-on-and-all-other-parameters/

Game_Menu Form1 = new Game_Menu();
Form1.ShowDialog();

Game_Menu is the form name

Form1 is the object name

You could create Util class:

public final class CollectionHelpers {
    public static <T> boolean addNullSafe(List<T> list, T element) {
        if (list == null || element == null) {
            return false;
        }

        return list.add(element);
    }
}

And then use it:

Element element = getElementFromSomeWhere(someParameter);
List<Element> arrayList = new ArrayList<>();
CollectionHelpers.addNullSafe(list, element);

I assume we are talking about doing this in Bash?

I like to use sed to load the date values into an array so I can break down each field and do whatever I want with it. The following example assumes and input format of mm/dd/yyyy...

DATE=$2
DATE_ARRAY=(`echo $DATE | sed -e 's/\// /g'`)
MONTH=(`echo ${DATE_ARRAY[0]}`)
DAY=(`echo ${DATE_ARRAY[1]}`)
YEAR=(`echo ${DATE_ARRAY[2]}`)
LOAD_DATE=$YEAR$MONTH$DAY

you also may want to read up on the date command in linux. It can be very useful: http://unixhelp.ed.ac.uk/CGI/man-cgi?date

Hope that helps... :)

-Ryan

You have to add a ToolTip control to your form first. Then you can set the text it should display for other controls.

Here's a screenshot showing the designer after adding a ToolTip control which is named toolTip1:

You cannot use function calls in a class construction, you should initialize that value in the constructor function.

From the PHP Manual on class properties:

This declaration may include an initialization, but this initialization must be a constant value--that is, it must be able to be evaluated at compile time and must not depend on run-time information in order to be evaluated.

A working code sample:

<?php
    class UserDatabaseConnection
    {
        public $connection;
        public function __construct()
        {
            $this->connection = sqlite_open("[path]/data/users.sqlite", 0666);
        }
        public function lookupUser($username)
        {
            // rest of my code...
            // example usage (procedural way):
            $query = sqlite_exec($this->connection, "SELECT ...", $error);
            // object oriented way:
            $query = $this->connection->queryExec("SELECT ...", $error);
        }
    }

    $udb = new UserDatabaseConnection;
?>

Depending on your needs, protected or private might be a better choice for $connection. That protects you from accidentally closing or messing with the connection.

print locals()

edit continued from comment.

To make it look a little prettier when printing:

import sys, pprint
sys.displayhook = pprint.pprint
locals()

That should give you a more vertical printout.

ng-bind-html-unsafe only renders the content as HTML. It doesn't bind Angular scope to the resulted DOM. You have to use $compile service for that purpose. I created this plunker to demonstrate how to use $compile to create a directive rendering dynamic HTML entered by users and binding to the controller's scope. The source is posted below.

demo.html

<!DOCTYPE html>
<html ng-app="app">

  <head>
    <script data-require="[email protected]" data-semver="1.0.7" src="https://ajax.googleapis.com/ajax/libs/angularjs/1.0.7/angular.js"></script>
    <script src="script.js"></script>
  </head>

  <body>
    <h1>Compile dynamic HTML</h1>
    <div ng-controller="MyController">
      <textarea ng-model="html"></textarea>
      <div dynamic="html"></div>
    </div>
  </body>

</html>

script.js

var app = angular.module('app', []);

app.directive('dynamic', function ($compile) {
  return {
    restrict: 'A',
    replace: true,
    link: function (scope, ele, attrs) {
      scope.$watch(attrs.dynamic, function(html) {
        ele.html(html);
        $compile(ele.contents())(scope);
      });
    }
  };
});

function MyController($scope) {
  $scope.click = function(arg) {
    alert('Clicked ' + arg);
  }
  $scope.html = '<a ng-click="click(1)" href="#">Click me</a>';
}

Whereas @jbarrueta answer is perfect, in the 2.12 version of Jackson was introduced a new long-awaited type for the @JsonTypeInfo annotation, DEDUCTION.

It is useful for the cases when you have no way to change the incoming json or must not do so. I'd still recommend to use use = JsonTypeInfo.Id.NAME, as the new way may throw an exception in complex cases when it has no way to determine which subtype to use.

Now you can simply write

import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
import com.fasterxml.jackson.annotation.JsonSubTypes;
import com.fasterxml.jackson.annotation.JsonTypeInfo;

@JsonIgnoreProperties(ignoreUnknown = true)
@JsonTypeInfo(use = JsonTypeInfo.Id.DEDUCTION)
@JsonSubTypes({
    @JsonSubTypes.Type(Dog.class),
    @JsonSubTypes.Type(Cat.class) }
)
public abstract class Animal {

    private String name;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

}

And it will produce {"name":"ruffus", "breed":"english shepherd"} and {"name":"goya", "favoriteToy":"mice"}

Once again, it's safer to use NAME if some of the fields may be not present, like breed or favoriteToy.

I used a variation of the above but instead of printing html I built a form and submitted it to the 3rd party url:

    var mapForm = document.createElement("form");
    mapForm.target = "Map";
    mapForm.method = "POST"; // or "post" if appropriate
    mapForm.action = "http://www.url.com/map.php";

    var mapInput = document.createElement("input");
    mapInput.type = "text";
    mapInput.name = "addrs";
    mapInput.value = data;
    mapForm.appendChild(mapInput);

    document.body.appendChild(mapForm);

    map = window.open("", "Map", "status=0,title=0,height=600,width=800,scrollbars=1");

if (map) {
    mapForm.submit();
} else {
    alert('You must allow popups for this map to work.');
}

but.onclick = callJavascriptFunction;

no double quotes no parentheses.

Any Table ID

Use: INT(11).

MySQL indexes will be able to parse through an int list fastest.

Anything Security

Use: BINARY(x), or BLOB(x).

You can store security tokens, etc., as hex directly in BINARY(x) or BLOB(x). To retrieve from binary-type, use SELECT HEX(field)... or SELECT ... WHERE field = UNHEX("ABCD....").

Anything Date

Use: DATETIME, DATE, or TIME.

Always use DATETIME if you need to store both date and time (instead of a pair of fields), as a DATETIME indexing is more amenable to date-comparisons in MySQL.

Anything True-False

Use: BIT(1) (MySQL 8-only.) Otherwise, use BOOLEAN(1).

BOOLEAN is actually just an alias of TINYINT(1), which actually stores 0 to 255 (not exactly a true/false, is it?).

Anything You Want to call `SUM()`, `MAX()`, or similar functions on

Use: INT(11).

VARCHAR or other types of fields won't work with the SUM(), etc., functions.

Anything Over 1,000 Characters

Use: TEXT.

Max limit is 65,535.

Anything Over 65,535 Characters

Use: MEDIUMTEXT.

Max limit is 16,777,215.

Anything Over 16,777,215 Characters

Use: LONGTEXT.

Max limit is 4,294,967,295.

FirstName, LastName

Use : VARCHAR(255).

UTF-8 characters can take up three characters per visible character, and some cultures do not distinguish firstname and lastname. Additionally, cultures may have disagreements about which name is first and which name is last. You should name these fields Person.GivenName and Person.FamilyName.

Email Address

Use : VARCHAR(256).

The definition of an e-mail path is set in RFC821 in 1982. The maximum limit of an e-mail was set by RFC2821 in 2001, and these limits were kept unchanged by RFC5321 in 2008. (See the section: 4.5.3.1. Size Limits and Minimums.) RFC3696, published 2004, mistakenly cites the email address limit as 320 characters, but this was an "info-only" RFC that explicitly "defines no standards" according to its intro, so disregard it.

Phone

Use: VARCHAR(255).

You never know when the phone number will be in the form of "1800...", or "1-800", or "1-(800)", or if it will end with "ext. 42", or "ask for susan".

ZipCode

Use: VARCHAR(10).

You'll get data like 12345 or 12345-6789. Use validation to cleanse this input.

URL

Use: VARCHAR(2000).

Official standards support URL's much longer than this, but few modern browsers support URL's over 2,000 characters. See this SO answer: What is the maximum length of a URL in different browsers?

Price

Use: DECIMAL(11,2).

It goes up to 11.

As it has been mentioned before, it's usually the case of an assembly not being there.

To know exactly what assembly you're missing, attach your debugger, set a breakpoint and when you see the exception object, drill down to the 'LoaderExceptions' property. The missing assembly should be there.

Hope it helps!

Maybe you can use a helper function like this:

// events and args should be of type Array
function addMultipleListeners(element,events,handler,useCapture,args){
  if (!(events instanceof Array)){
    throw 'addMultipleListeners: '+
          'please supply an array of eventstrings '+
          '(like ["click","mouseover"])';
  }
  //create a wrapper to be able to use additional arguments
  var handlerFn = function(e){
    handler.apply(this, args && args instanceof Array ? args : []);
  }
  for (var i=0;i<events.length;i+=1){
    element.addEventListener(events[i],handlerFn,useCapture);
  }
}

function handler(e) {
  // do things
};

// usage
addMultipleListeners(
    document.getElementById('first'),
    ['touchstart','click'],
    handler,
    false);

[Edit nov. 2020] This answer is pretty old. The way I solve this nowadays is by using an actions object where handlers are specified per event type, a data-attribute for an element to indicate which action should be executed on it and one generic document wide handler method (so event delegation).

const firstElemHandler = (elem, evt) =>
  elem.textContent = `You ${evt.type === "click" ? "clicked" : "touched"}!`;
const actions = {
  click: {
    firstElemHandler,
  },
  touchstart: {
    firstElemHandler,
  },
  mouseover: {
    firstElemHandler: elem => elem.textContent = "Now ... click me!",
    outerHandling: elem => {
      console.clear();
      console.log(`Hi from outerHandling, handle time ${
        new Date().toLocaleTimeString()}`);
    },
  }
};

Object.keys(actions).forEach(key => document.addEventListener(key, handle));

function handle(evt) {
  const origin = evt.target.closest("[data-action]");
  return origin &&
    actions[evt.type] &&
    actions[evt.type][origin.dataset.action] &&
    actions[evt.type][origin.dataset.action](origin, evt) ||
    true;
}

[data-action]:hover {
  cursor: pointer;
}

<div data-action="outerHandling">
  <div id="first" data-action="firstElemHandler">
    <b>Hover, click or tap</b>
  </div>
  this is handled too (on mouse over)
</div>

I tried this and got a ';'-delimited csv file:

--#SET TERMINATOR % 
EXPORT TO result.csv OF DEL MODIFIED BY CHARDEL;
SELECT * FROM A

Use this code

<input type="number" step="0.01" name="amount" placeholder="0.00">

By default Step value for HTML5 Input elements is step="1".

Try the following script:

Exec sp_msforeachtable 'SET QUOTED_IDENTIFIER ON; ALTER INDEX ALL ON ? REBUILD'
GO

Also

I prefer(After a long search) to use the following script, it contains @fillfactor determines how much percentage of the space on each leaf-level page is filled with data.

DECLARE @TableName VARCHAR(255)
DECLARE @sql NVARCHAR(500)
DECLARE @fillfactor INT
SET @fillfactor = 80 
DECLARE TableCursor CURSOR FOR
SELECT QUOTENAME(OBJECT_SCHEMA_NAME([object_id]))+'.' + QUOTENAME(name) AS TableName
FROM sys.tables
OPEN TableCursor
FETCH NEXT FROM TableCursor INTO @TableName
WHILE @@FETCH_STATUS = 0
BEGIN
SET @sql = 'ALTER INDEX ALL ON ' + @TableName + ' REBUILD WITH (FILLFACTOR = ' + CONVERT(VARCHAR(3),@fillfactor) + ')'
EXEC (@sql)
FETCH NEXT FROM TableCursor INTO @TableName
END
CLOSE TableCursor
DEALLOCATE TableCursor
GO

for more info, check the following link:

https://blog.sqlauthority.com/2009/01/30/sql-server-2008-2005-rebuild-every-index-of-all-tables-of-database-rebuild-index-with-fillfactor/

and if you want to Check Index Fragmentation on Indexes in a Database, try the following script:

SELECT dbschemas.[name] as 'Schema',
dbtables.[name] as 'Table',
dbindexes.[name] as 'Index',
indexstats.avg_fragmentation_in_percent,
indexstats.page_count
FROM sys.dm_db_index_physical_stats (DB_ID(), NULL, NULL, NULL, NULL) AS indexstats
INNER JOIN sys.tables dbtables on dbtables.[object_id] = indexstats.[object_id]
INNER JOIN sys.schemas dbschemas on dbtables.[schema_id] = dbschemas.[schema_id]
INNER JOIN sys.indexes AS dbindexes ON dbindexes.[object_id] = indexstats.[object_id]
AND indexstats.index_id = dbindexes.index_id
WHERE indexstats.database_id = DB_ID() AND dbtables.[name] like '%%'
ORDER BY indexstats.avg_fragmentation_in_percent desc

For more information, Check the following link:

http://www.schneider-electric.com/en/faqs/FA234246/

onProgressChanged() should be called on every progress changed, not just on first and last touch (that why you have onStartTrackingTouch() and onStopTrackingTouch() methods).

Make sure that your SeekBar have more than 1 value, that is to say your MAX>=3.

In your onCreate:

 yourSeekBar=(SeekBar) findViewById(R.id.yourSeekBar);
 yourSeekBar.setOnSeekBarChangeListener(new yourListener());

Your listener:

private class yourListener implements SeekBar.OnSeekBarChangeListener {

        public void onProgressChanged(SeekBar seekBar, int progress,
                boolean fromUser) {
                            // Log the progress
            Log.d("DEBUG", "Progress is: "+progress);
                            //set textView's text
            yourTextView.setText(""+progress);
        }

        public void onStartTrackingTouch(SeekBar seekBar) {}

        public void onStopTrackingTouch(SeekBar seekBar) {}

    }

Please share some code and the Log results for furter help.

I run a small experiment to verify that printing with DBL_DECIMAL_DIG does indeed exactly preserve the number's binary representation. It turned out that for the compilers and C libraries I tried, DBL_DECIMAL_DIG is indeed the number of digits required, and printing with even one digit less creates a significant problem.

#include <float.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

union {
    short s[4];
    double d;
} u;

void
test(int digits)
{
    int i, j;
    char buff[40];
    double d2;
    int n, num_equal, bin_equal;

    srand(17);
    n = num_equal = bin_equal = 0;
    for (i = 0; i < 1000000; i++) {
        for (j = 0; j < 4; j++)
            u.s[j] = (rand() << 8) ^ rand();
        if (isnan(u.d))
            continue;
        n++;
        sprintf(buff, "%.*g", digits, u.d);
        sscanf(buff, "%lg", &d2);
        if (u.d == d2)
            num_equal++;
        if (memcmp(&u.d, &d2, sizeof(double)) == 0)
            bin_equal++;
    }
    printf("Tested %d values with %d digits: %d found numericaly equal, %d found binary equal\n", n, digits, num_equal, bin_equal);
}

int
main()
{
    test(DBL_DECIMAL_DIG);
    test(DBL_DECIMAL_DIG - 1);
    return 0;
}

I run this with Microsoft's C compiler 19.00.24215.1 and gcc version 7.4.0 20170516 (Debian 6.3.0-18+deb9u1). Using one less decimal digit halves the number of numbers that compare exactly equal. (I also verified that rand() as used indeed produces about one million different numbers.) Here are the detailed results.

Microsoft C

Tested 999507 values with 17 digits: 999507 found numericaly equal, 999507 found binary equal
Tested 999507 values with 16 digits: 545389 found numericaly equal, 545389 found binary equal

GCC

Tested 999485 values with 17 digits: 999485 found numericaly equal, 999485 found binary equal
Tested 999485 values with 16 digits: 545402 found numericaly equal, 545402 found binary equal

There is an option without additional packages that works under pdflatex

Adapt this code

\begin{figure}[h]
    \centering
    \includegraphics[width=\ScaleIfNeeded]{figuras/diagrama-spearman.pdf}
    \caption{Schematical view of Spearman's theory.}
\end{figure}

"diagrama-spearman.pdf" is a plot generated with TikZ and this is the code (it is another .tex file different from the .tex file where I want to insert a pdf)

\documentclass[border=3mm]{standalone}
\usepackage[applemac]{inputenc}
\usepackage[protrusion=true,expansion=true]{microtype}
\usepackage[bb=lucida,bbscaled=1,cal=boondoxo]{mathalfa}
\usepackage[stdmathitalics=true,math-style=iso,lucidasmallscale=true,romanfamily=bright]{lucimatx}
\usepackage{tikz}
\usetikzlibrary{intersections}
\newcommand{\at}{\makeatletter @\makeatother}

\begin{document}

\begin{tikzpicture}
\tikzset{venn circle/.style={draw,circle,minimum width=5cm,fill=#1,opacity=1}}
\node [venn circle = none, name path=A] (A) at (45:2cm) { };
\node [venn circle = none, name path=B] (B) at (135:2cm) { };
\node [venn circle = none, name path=C] (C) at (225:2cm) { };
\node [venn circle = none, name path=D] (D) at (315:2cm) { };
\node[above right] at (barycentric cs:A=1) {logical}; 
\node[above left] at (barycentric cs:B=1) {mechanical}; 
\node[below left] at (barycentric cs:C=1) {spatial}; 
\node[below right] at (barycentric cs:D=1) {arithmetical}; 
\node at (0,0) {G};    
\end{tikzpicture}

\end{document} 

This is the diagram I included

For making alert just put below javascript code in footer.

<script> 
 $(document).ready(function(){
    alert('Hi');
 });
</script>

You need to also load jquery min file. Please insert this script in header.

<script type='text/javascript' src='https://code.jquery.com/jquery-1.12.0.min.js'></script>

So you want to create a list of lists... We need to start with an empty list

list_of_lists = []

next, we read the file content, line by line

with open('data') as f:
    for line in f:
        inner_list = [elt.strip() for elt in line.split(',')]
        # in alternative, if you need to use the file content as numbers
        # inner_list = [int(elt.strip()) for elt in line.split(',')]
        list_of_lists.append(inner_list)

A common use case is that of columnar data, but our units of storage are the rows of the file, that we have read one by one, so you may want to transpose your list of lists. This can be done with the following idiom

by_cols = zip(*list_of_lists)

Another common use is to give a name to each column

col_names = ('apples sold', 'pears sold', 'apples revenue', 'pears revenue')
by_names = {}
for i, col_name in enumerate(col_names):
    by_names[col_name] = by_cols[i]

so that you can operate on homogeneous data items

 mean_apple_prices = [money/fruits for money, fruits in
                     zip(by_names['apples revenue'], by_names['apples_sold'])]

Most of what I've written can be speeded up using the csv module, from the standard library. Another third party module is pandas, that lets you automate most aspects of a typical data analysis (but has a number of dependencies).

Update While in Python 2 zip(*list_of_lists) returns a different (transposed) list of lists, in Python 3 the situation has changed and zip(*list_of_lists) returns a zip object that is not subscriptable.

If you need indexed access you can use

by_cols = list(zip(*list_of_lists))

that gives you a list of lists in both versions of Python.

On the other hand, if you don't need indexed access and what you want is just to build a dictionary indexed by column names, a zip object is just fine...

file = open('some_data.csv')
names = get_names(next(file))
columns = zip(*((x.strip() for x in line.split(',')) for line in file)))
d = {}
for name, column in zip(names, columns): d[name] = column

If you're using express > 4.16, you can use express.json() and express.urlencoded()

The express.json() and express.urlencoded() middleware have been added to provide request body parsing support out-of-the-box. This uses the expressjs/body-parser module module underneath, so apps that are currently requiring the module separately can switch to the built-in parsers.

Source Express 4.16.0 - Release date: 2017-09-28

With this,

const bodyParser  = require('body-parser');

app.use(bodyParser.urlencoded({ extended: true }));
app.use(bodyParser.json());

becomes,

const express = require('express');

app.use(express.urlencoded({ extended: true }));
app.use(express.json());

The steps in order to make a full check are:

Prepare the captor :

ArgumentCaptor<SomeArgumentClass> someArgumentCaptor = ArgumentCaptor.forClass(SomeArgumentClass.class);

verify the call to dependent on component (collaborator of subject under test). times(1) is the default value, so ne need to add it.

verify(dependentOnComponent, times(1)).send(someArgumentCaptor.capture());

Get the argument passed to collaborator

SomeArgumentClass someArgument = messageCaptor.getValue();

someArgument can be used for assertions

This tool will do the work for you:

http://www.guigarage.com/2013/02/change-java-version-on-mac-os/

It's a simple JavaOne that can be used to define the current Java Version. The version can be used in a shell that is opened after a version was selected in the tool.

Many answers have suggested pow() or similar alternatives or their own implementations. However, given the examples (2^1, 2^2 and 2^3) in your question, I would guess whether you only need to raise 2 to an integer power. If this is the case, I would suggest you to use 1 << n for 2^n.

Problem

The trim() method removes whitespace from both sides of a string.

Source

Solution

You can use a Javascript replace method to remove white space like

"hello world".replace(/\s/g, "");

Example

var out = "hello world".replace(/\s/g, "");_x000D_
console.log(out);

thelist.Max(e => e.age);

This is a solution but in form of my story with this problem:

I was almost dead trying all the solution given above(for 3 days ) and nothing worked for me.

I lost all hope.

I contacted my security team regarding this because i was behind a proxy and they told that they had recently updated their security policy.

I scolded them badly for not informing the Developers.

Later they issued a new "cacerts" file which contains all the certificates.

I removed the cacerts file which is present inside %JAVA_HOME%/jre/lib/security and it solved my problem.

So if you are facing this issue it might be from your network team also like this.

Already mentioned. Just a LINQ answer:

var columns = reader.GetSchemaTable().Rows
                                     .Cast<DataRow>()
                                     .Select(r => (string)r["ColumnName"])
                                     .ToList();

//Or

var columns = Enumerable.Range(0, reader.FieldCount)
                        .Select(reader.GetName)
                        .ToList();

The second one is cleaner and much faster. Even if you cache GetSchemaTable in the first approach, the querying is going to be very slow.

Try this:

find . -name "*.pdf" -type f -exec cp {} ./pdfsfolder \;

Based on @ford04 answer, here is the same encapsulated in a method :

import React, { FC, useState, useEffect, DependencyList } from 'react';

export function useEffectAsync( effectAsyncFun : ( isMounted: () => boolean ) => unknown, deps?: DependencyList ) {
    useEffect( () => {
        let isMounted = true;
        const _unused = effectAsyncFun( () => isMounted );
        return () => { isMounted = false; };
    }, deps );
} 

Usage:

const MyComponent : FC<{}> = (props) => {
    const [ asyncProp , setAsyncProp ] = useState( '' ) ;
    useEffectAsync( async ( isMounted ) =>
    {
        const someAsyncProp = await ... ;
        if ( isMounted() )
             setAsyncProp( someAsyncProp ) ;
    });
    return <div> ... ;
} ;

# -*- encoding: utf-8 -*-

# converting a unknown formatting file in utf-8

import codecs
import commands

file_location = "jumper.sub"
file_encoding = commands.getoutput('file -b --mime-encoding %s' % file_location)

file_stream = codecs.open(file_location, 'r', file_encoding)
file_output = codecs.open(file_location+"b", 'w', 'utf-8')

for l in file_stream:
    file_output.write(l)

file_stream.close()
file_output.close()

resize2fs Command will not work for all file systems.

Please confirm the file system of your instance using below command.

Please follow the procedure to expand volume by following the steps mentioned in Amazon official document for different file systems.

https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/recognize-expanded-volume-linux.html

Default file system in Centos is xfs, use the following command for xfs file system to increase partition size.

sudo xfs_growfs -d /

then "df -h" to check.

so easy, only use margin and left, right properties:

.elements {
 position: absolute;
 margin-left: auto;
 margin-right: auto;
 left: 0;
 right: 0;
}

You can see more in this tip => How to set div element to center in html- Obinb blog

You can use:

<input (input)="saverange()>

I had the same issue, after trying each of the answers here, I noticed that a package which I had renamed had not been renamed in a class which imported it. I fixed the name and immediately solved the problem.

Alternatively, you can just do:

import matplotlib as mpl
label_size = 8
mpl.rcParams['xtick.labelsize'] = label_size 

Are any other LoadModule commands referencing modules in the /usr/lib/httpd/modules folder? If so, you should be fine just adding LoadModule ssl_module /usr/lib/httpd/modules/mod_ssl.so to your conf file.

Otherwise, you'll want to copy the mod_ssl.so file to whatever directory the other modules are being loaded from and reference it there.

The following code checks if a given value is in the array and returns its zero-based offset:

A=("one" "two" "three four")
VALUE="two"

if [[ "$(declare -p A)" =~ '['([0-9]+)']="'$VALUE'"' ]];then
  echo "Found $VALUE at offset ${BASH_REMATCH[1]}"
else
  echo "Couldn't find $VALUE"
fi

The match is done on the complete values, therefore setting VALUE="three" would not match.

In my case this was caused by a faulty deployment where a setting in my web.config was not made.

A collegue explained that the IP address in the error message represents the localhost.

When I corrected the web.config I was then using the correct url to make the server calls and it worked.

I thought I would post this in case it might help someone.

Even if the question is old, a more accurate answer about Management Studio would be required.

You can create the column manually or with Management Studio. But Management Studio will require to recreate the table and will result in a time out if you have too much data in it already, avoid unless the table is light.

To change the order of the columns you simply need to move them around in Management Studio. This should not require (Exceptions most likely exists) that Management Studio to recreate the table since it most likely change the ordination of the columns in the table definitions.

I've done it this way on numerous occasion with tables that I could not add columns with the GUI because of the data in them. Then moved the columns around with the GUI of Management Studio and simply saved them.

You will go from an assured time out to a few seconds of waiting.

IMHO, using list() and dict() makes your Python look like C. Ugh.

I run my MySQL on a virtual machine in Ubuntu, So what had happened was when I restarted my host and the VM, The IP had changed. I had configured mysql to run on IP 192.168.0.5 and now due to dynamic allocation of IP, my new IP was 192.168.0.8

If you have the same problem just check your ip with the command ifconfig.

Check your MySQL binding with the command cat /etc/mysql/my.cnf | grep bind-address

If both IP are the Same, then reinstall your mysql server

If not, then change your IP in /etc/network/interfaces using nano, vi, vim or anything of your preference.

I prefer sudo nano /etc/network/interfaces

and enter the following

auto eth0
iface eth0 inet static
address 192.168.0.5
netmask 255.255.255.0

Save the interfaces file, restart your interface sudo ifdown eth0 && sudo ifup eth0 replace "eth0" with your network interface

Restart MySQL sudo service mysql stop followed by sudo service mysql start

If you have the same issue as mine, You are good to go!

Using Promises (Q) to solve this in a Functional style:

var fs = require('fs'),
    fsPath = require('path'),
    Q = require('q');

var walk = function (dir) {
  return Q.ninvoke(fs, 'readdir', dir).then(function (files) {

    return Q.all(files.map(function (file) {

      file = fsPath.join(dir, file);
      return Q.ninvoke(fs, 'lstat', file).then(function (stat) {

        if (stat.isDirectory()) {
          return walk(file);
        } else {
          return [file];
        }
      });
    }));
  }).then(function (files) {
    return files.reduce(function (pre, cur) {
      return pre.concat(cur);
    });
  });
};

It returns a promise of an array, so you can use it as:

walk('/home/mypath').then(function (files) { console.log(files); });

If you are trying to read a file from the workspace during a pipeline build step, there's a method for that:

readFile('name-of-file.groovy')

For reference, see https://jenkins.io/doc/pipeline/steps/workflow-basic-steps/#readfile-read-file-from-workspace.

a = (MYTYPE){ true, 15, 0.123 };

would do fine in C99

If the structure of your xml (or text in general) is fixed, the easiest way is using cut. For your specific case:

echo '<table name="content_analyzer" primary-key="id">
  <type="global" />
</table>
<table name="content_analyzer2" primary-key="id">
  <type="global" />
</table>
<table name="content_analyzer_items" primary-key="id">
  <type="global" />
</table>' | grep name= | cut -f2 -d '"'

Or all in one go:

  var obj:any = {}
  obj.prop = 5;

Doing this yourself will give you insight into how a WSDL is structured and how it gets your job done. It is a good learning opportunity. This can be done using soapUI, if you only have the URL of the WSDL. (I'm using soapUI 5.2.1) If you actually have the complete WSDL as a file available to you, you don't even need soapUI. The title of the question says "Request & Response XML" while the question body says "Request & Response XML formats" which I interpret as the schema of the request and response. At any rate, the following will give you the schema which you can use on XSD2XML to generate sample XML.

1. Start a "New Soap Project", enter a project name and WSDL location; choose to "Create Requests", unselect the other options and click OK.
2. Under the "Project" tree on the left side, right-click an interface and choose "Show Interface Viewer".
3. Select the "WSDL Content" tab.
4. You should see the WSDL text on the right hand side; look for the block starting with "wsdl:types" below which are the schema for the input and output messages.
5. Each schema definition starts with something like <s:element name="GetWeather"> and ends with </s:element>.
6. Copy out the block into a text editor; above this block add: <?xml version="1.0" encoding="UTF-8"?> <s:schema xmlns:s="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified">
7. Below the block of copied XML, add </s:schema>
8. Decide if you need "UTF-16" instead of "UTF-8"
9. The "s:" and the "xmlns:s" should match the block you copied (step 5)
10. Save this file with ".xsd" extension; if you have "XML Copy Editor" or some such tool (XML Spy, may be) you should check that this is well-formed XML and valid schema.
11. Repeat for all "element" items in the right hand pane of soapUI until you reach
12. This way you'll get some type definitions you might not be interested in. If you want to pick and choose, use the following method: Look through the "wsdl:operation" items under "wsdl:portType" in the WSDL text below the type definitions. They will have "wsdl:input" and "wsdl:output". Take the message names from "wsdl:input" and "wsdl:output". Match them against "wsdl:message" names which will likely be above the "wsdl:portType" entries in the WSDL. Get the "wsdl:part" element name from "wsdl:message" item and look for that name as element name under "wsdl:types". Those will be the schema of interest to you.

You can try above procedure out using the WSDL at http://www.webservicex.com/globalweather.asmx?wsdl

If this is for Linux, I've been using the function "gettimeofday", which returns a struct that gives the seconds and microseconds since the Epoch. You can then use timersub to subtract the two to get the difference in time, and convert it to whatever precision of time you want. However, you specify nanoseconds, and it looks like the function clock_gettime() is what you're looking for. It puts the time in terms of seconds and nanoseconds into the structure you pass into it.

The Eclipse team with The Open University have prepared the following document, which includes creating proxy classes with tests. It might be what you are looking for.

http://www.eclipse.org/webtools/community/education/web/t320/Generating_a_client_from_WSDL.pdf

Everything is included in the Dynamic Web Project template.

In the project create a Web Service Client. This starts a wizard that has you point out a wsdl url and creates the client with tests for you.

The user guide (targeted at indigo though) for this task is found at http://help.eclipse.org/indigo/index.jsp?topic=%2Forg.eclipse.jst.ws.cxf.doc.user%2Ftasks%2Fcreate_client.html.

If the value is between –2147483648 and 2147483647, cast(string_filed as int) will work. else cast(string_filed as bigint) will work

    hive> select cast('2147483647' as int);
    OK
    2147483647
    
    hive> select cast('2147483648' as int);
    OK
    NULL
    
    hive> select cast('2147483648' as bigint);
    OK
    2147483648

monkey --pct-syskeys 0 for development boards

Without this argument, the app won't open on a development board without keys / display:

adb shell monkey --pct-syskeys 0 -p com.cirosantilli.android_cheat.textviewbold 1

and fails with error:

SYS_KEYS has no physical keys but with factor 2.0%

Tested on HiKey960, Android O AOSP.

Learned from: https://github.com/ARM-software/lisa/pull/408

Also asked at: monkey test : If the Android system doesnt has physical keys ,what are the parameters need to be includeded in the command

Apache

Does this answer describe or help your situation? Upgrading to Apache 2.4 come with some changes in Apache configuration.

Laravel

Are you checking Laravel's logs or Apache's logs?

Since upgrading to Laravel 4.1, I've had white screen "errors" (WSOD) when the application could not write to the log location. I've always solved this by making the app/storage directory writable by Apache (either group writable to "www-data", "apache" or world-writable - that depends on your server setup.

Web Server User

On Ubuntu/Debian servers, your PHP may be running as user "www-data". On CentOS/RedHat/Fedora servers, you PHP may be running as user "apache".

Make sure your files are owned by the user that is running PHP:

# Debian/Ubuntu
$ sudo chown -R www-data /path/to/laravel/files

# CentOS/RedHat/Fedora
$ sudo chown -R apache /path/to/laravel/files

Note that you might not be running as user www-data or apache. It depends on your hosting and setup!

Laravel 4

# Group Writable (Group, User Writable)
$ sudo chmod -R gu+w app/storage

# World-writable (Group, User, Other Writable)
$ sudo chmod -R guo+w app/storage

Laravel 5+ (including 6)

# Group Writable (Group, User Writable)
$ sudo chmod -R gu+w storage

# World-writable (Group, User, Other Writable)
$ sudo chmod -R guo+w storage

#####
# The bootstrap/cache directory may need writing to also
##

# Group Writable (Group, User Writable)
$ sudo chmod -R gu+w bootstrap/cache

# World-writable (Group, User, Other Writable)
$ sudo chmod -R guo+w bootstrap/cache

You can implement a middleware which handles Basic authentication.

public async Task Invoke(HttpContext context)
{
    var authHeader = context.Request.Headers.Get("Authorization");
    if (authHeader != null && authHeader.StartsWith("basic", StringComparison.OrdinalIgnoreCase))
    {
        var token = authHeader.Substring("Basic ".Length).Trim();
        System.Console.WriteLine(token);
        var credentialstring = Encoding.UTF8.GetString(Convert.FromBase64String(token));
        var credentials = credentialstring.Split(':');
        if(credentials[0] == "admin" && credentials[1] == "admin")
        {
            var claims = new[] { new Claim("name", credentials[0]), new Claim(ClaimTypes.Role, "Admin") };
            var identity = new ClaimsIdentity(claims, "Basic");
            context.User = new ClaimsPrincipal(identity);
        }
    }
    else
    {
        context.Response.StatusCode = 401;
        context.Response.Headers.Set("WWW-Authenticate", "Basic realm=\"dotnetthoughts.net\"");
    }
    await _next(context);
}

This code is written in a beta version of asp.net core. Hope it helps.

after you add the user for testing. the user should get an email. open that email by your iOS device, then click "Start testing" it will bring you to testFlight to download the app directly. If you open that email via computer, and then click "Start testing" it will show you another page which have the instruction of how to install the app. and that invitation code is on the last line. those All upper case letters is the code.

Implement __str__() or __repr__() in the class's metaclass.

class MC(type):
  def __repr__(self):
    return 'Wahaha!'

class C(object):
  __metaclass__ = MC

print C

Use __str__ if you mean a readable stringification, use __repr__ for unambiguous representations.

Here is my suggested validation:

var isValid = false;

// Check whether this entered value is numeric.
function checkNumeric() {
    var numericVal = document.getElementById("txt_numeric").value;

    if(isNaN(numericVal) || numericVal == "" || numericVal == null || numericVal.indexOf(' ') >= 0) {
        alert("Please, enter a numeric value!");
        isValid = false;
    } else {
        isValid = true;
    }
}

How was the database exported?

• If it was exported using exp and a full schema was exported, then

  1. Create the user:

     create user <username> identified by <password> default tablespace <tablespacename> quota unlimited on <tablespacename>;
     

  2. Grant the rights:

     grant connect, create session, imp_full_database to <username>;
     

  3. Start the import with imp:

     imp <username>/<password>@<hostname> file=<filename>.dmp log=<filename>.log full=y;
     

• If it was exported using expdp, then start the import with impdp:

  impdp <username>/<password> directory=<directoryname> dumpfile=<filename>.dmp logfile=<filename>.log full=y;
  

Looking at the error log, it seems you have not specified the directory, so Oracle tries to find the dmp file in the default directory (i.e., E:\app\Vensi\admin\oratest\dpdump\).

Either move the export file to the above path or create a directory object to pointing to the path where the dmp file is present and pass the object name to the impdp command above.

EDIT: Since the answer is not valid with newer versions of jquery As jQuery.browser is deprecated in ver 1.9, So Use Jquery Migrate Plugin for that matter.

Original Answer

jQuery.browser

jQuery.browser and jQuery.browser.version

is your way to go...

matches method performs matching of full line, i.e. it is equivalent to find() with '^abc$'. So, just use Pattern.compile("[a-zA-Z]").matcher(str).find() instead. Then fix your regex. As @user unknown mentioned your regex actually matches only one character. You probably should say [a-zA-Z]+

Boost stacktrace

Documented at: https://www.boost.org/doc/libs/1_66_0/doc/html/stacktrace/getting_started.html#stacktrace.getting_started.how_to_print_current_call_stack

This is the most convenient option I've seen so far, because it:

• can actually print out the line numbers.

  It just makes calls to addr2line however, which is ugly and might be slow if your are taking too many traces.

• demangles by default

• Boost is header only, so no need to modify your build system most likely

boost_stacktrace.cpp

#include <iostream>

#define BOOST_STACKTRACE_USE_ADDR2LINE
#include <boost/stacktrace.hpp>

void my_func_2(void) {
    std::cout << boost::stacktrace::stacktrace() << std::endl;
}

void my_func_1(double f) {
    (void)f;
    my_func_2();
}

void my_func_1(int i) {
    (void)i;
    my_func_2();
}

int main(int argc, char **argv) {
    long long unsigned int n;
    if (argc > 1) {
        n = strtoul(argv[1], NULL, 0);
    } else {
        n = 1;
    }
    for (long long unsigned int i = 0; i < n; ++i) {
        my_func_1(1);   // line 28
        my_func_1(2.0); // line 29
    }
}

Unfortunately, it seems to be a more recent addition, and the package libboost-stacktrace-dev is not present in Ubuntu 16.04, only 18.04:

sudo apt-get install libboost-stacktrace-dev
g++ -fno-pie -ggdb3 -O0 -no-pie -o boost_stacktrace.out -std=c++11 \
  -Wall -Wextra -pedantic-errors boost_stacktrace.cpp -ldl
./boost_stacktrace.out

We have to add -ldl at the end or else compilation fails.

Output:

 0# boost::stacktrace::basic_stacktrace<std::allocator<boost::stacktrace::frame> >::basic_stacktrace() at /usr/include/boost/stacktrace/stacktrace.hpp:129
 1# my_func_1(int) at /home/ciro/test/boost_stacktrace.cpp:18
 2# main at /home/ciro/test/boost_stacktrace.cpp:29 (discriminator 2)
 3# __libc_start_main in /lib/x86_64-linux-gnu/libc.so.6
 4# _start in ./boost_stacktrace.out

 0# boost::stacktrace::basic_stacktrace<std::allocator<boost::stacktrace::frame> >::basic_stacktrace() at /usr/include/boost/stacktrace/stacktrace.hpp:129
 1# my_func_1(double) at /home/ciro/test/boost_stacktrace.cpp:13
 2# main at /home/ciro/test/boost_stacktrace.cpp:27 (discriminator 2)
 3# __libc_start_main in /lib/x86_64-linux-gnu/libc.so.6
 4# _start in ./boost_stacktrace.out

The output and is further explained on the "glibc backtrace" section below, which is analogous.

Note how my_func_1(int) and my_func_1(float), which are mangled due to function overload, were nicely demangled for us.

Note that the first int calls is off by one line (28 instead of 27 and the second one is off by two lines (27 instead of 29). It was suggested in the comments that this is because the following instruction address is being considered, which makes 27 become 28, and 29 jump off the loop and become 27.

We then observe that with -O3, the output is completely mutilated:

 0# boost::stacktrace::basic_stacktrace<std::allocator<boost::stacktrace::frame> >::size() const at /usr/include/boost/stacktrace/stacktrace.hpp:215
 1# my_func_1(double) at /home/ciro/test/boost_stacktrace.cpp:12
 2# __libc_start_main in /lib/x86_64-linux-gnu/libc.so.6
 3# _start in ./boost_stacktrace.out

 0# boost::stacktrace::basic_stacktrace<std::allocator<boost::stacktrace::frame> >::size() const at /usr/include/boost/stacktrace/stacktrace.hpp:215
 1# main at /home/ciro/test/boost_stacktrace.cpp:31
 2# __libc_start_main in /lib/x86_64-linux-gnu/libc.so.6
 3# _start in ./boost_stacktrace.out

Backtraces are in general irreparably mutilated by optimizations. Tail call optimization is a notable example of that: What is tail call optimization?

Benchmark run on -O3:

time  ./boost_stacktrace.out 1000 >/dev/null

Output:

real    0m43.573s
user    0m30.799s
sys     0m13.665s

So as expected, we see that this method is extremely slow likely to to external calls to addr2line, and is only going to be feasible if a limited number of calls are being made.

Each backtrace print seems to take hundreds of milliseconds, so be warned that if a backtrace happens very often, program performance will suffer significantly.

Tested on Ubuntu 19.10, GCC 9.2.1, boost 1.67.0.

glibc backtrace

Documented at: https://www.gnu.org/software/libc/manual/html_node/Backtraces.html

main.c

#include <stdio.h>
#include <stdlib.h>

/* Paste this on the file you want to debug. */
#include <stdio.h>
#include <execinfo.h>
void print_trace(void) {
    char **strings;
    size_t i, size;
    enum Constexpr { MAX_SIZE = 1024 };
    void *array[MAX_SIZE];
    size = backtrace(array, MAX_SIZE);
    strings = backtrace_symbols(array, size);
    for (i = 0; i < size; i++)
        printf("%s\n", strings[i]);
    puts("");
    free(strings);
}

void my_func_3(void) {
    print_trace();
}

void my_func_2(void) {
    my_func_3();
}

void my_func_1(void) {
    my_func_3();
}

int main(void) {
    my_func_1(); /* line 33 */
    my_func_2(); /* line 34 */
    return 0;
}

Compile:

gcc -fno-pie -ggdb3 -O3 -no-pie -o main.out -rdynamic -std=c99 \
  -Wall -Wextra -pedantic-errors main.c

-rdynamic is the key required option.

Run:

./main.out

Outputs:

./main.out(print_trace+0x2d) [0x400a3d]
./main.out(main+0x9) [0x4008f9]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0) [0x7f35a5aad830]
./main.out(_start+0x29) [0x400939]

./main.out(print_trace+0x2d) [0x400a3d]
./main.out(main+0xe) [0x4008fe]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0) [0x7f35a5aad830]
./main.out(_start+0x29) [0x400939]

So we immediately see that an inlining optimization happened, and some functions were lost from the trace.

If we try to get the addresses:

addr2line -e main.out 0x4008f9 0x4008fe

we obtain:

/home/ciro/main.c:21
/home/ciro/main.c:36

which is completely off.

If we do the same with -O0 instead, ./main.out gives the correct full trace:

./main.out(print_trace+0x2e) [0x4009a4]
./main.out(my_func_3+0x9) [0x400a50]
./main.out(my_func_1+0x9) [0x400a68]
./main.out(main+0x9) [0x400a74]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0) [0x7f4711677830]
./main.out(_start+0x29) [0x4008a9]

./main.out(print_trace+0x2e) [0x4009a4]
./main.out(my_func_3+0x9) [0x400a50]
./main.out(my_func_2+0x9) [0x400a5c]
./main.out(main+0xe) [0x400a79]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0) [0x7f4711677830]
./main.out(_start+0x29) [0x4008a9]

and then:

addr2line -e main.out 0x400a74 0x400a79

gives:

/home/cirsan01/test/main.c:34
/home/cirsan01/test/main.c:35

so the lines are off by just one, TODO why? But this might still be usable.

Conclusion: backtraces can only possibly show perfectly with -O0. With optimizations, the original backtrace is fundamentally modified in the compiled code.

I couldn't find a simple way to automatically demangle C++ symbols with this however, here are some hacks:

• https://panthema.net/2008/0901-stacktrace-demangled/
• https://gist.github.com/fmela/591333/c64f4eb86037bb237862a8283df70cdfc25f01d3

Tested on Ubuntu 16.04, GCC 6.4.0, libc 2.23.

glibc backtrace_symbols_fd

This helper is a bit more convenient than backtrace_symbols, and produces basically identical output:

/* Paste this on the file you want to debug. */
#include <execinfo.h>
#include <stdio.h>
#include <unistd.h>
void print_trace(void) {
    size_t i, size;
    enum Constexpr { MAX_SIZE = 1024 };
    void *array[MAX_SIZE];
    size = backtrace(array, MAX_SIZE);
    backtrace_symbols_fd(array, size, STDOUT_FILENO);
    puts("");
}

Tested on Ubuntu 16.04, GCC 6.4.0, libc 2.23.

glibc backtrace with C++ demangling hack 1: -export-dynamic + dladdr

Adapted from: https://gist.github.com/fmela/591333/c64f4eb86037bb237862a8283df70cdfc25f01d3

This is a "hack" because it requires changing the ELF with -export-dynamic.

glibc_ldl.cpp

#include <dlfcn.h>     // for dladdr
#include <cxxabi.h>    // for __cxa_demangle

#include <cstdio>
#include <string>
#include <sstream>
#include <iostream>

// This function produces a stack backtrace with demangled function & method names.
std::string backtrace(int skip = 1)
{
    void *callstack[128];
    const int nMaxFrames = sizeof(callstack) / sizeof(callstack[0]);
    char buf[1024];
    int nFrames = backtrace(callstack, nMaxFrames);
    char **symbols = backtrace_symbols(callstack, nFrames);

    std::ostringstream trace_buf;
    for (int i = skip; i < nFrames; i++) {
        Dl_info info;
        if (dladdr(callstack[i], &info)) {
            char *demangled = NULL;
            int status;
            demangled = abi::__cxa_demangle(info.dli_sname, NULL, 0, &status);
            std::snprintf(
                buf,
                sizeof(buf),
                "%-3d %*p %s + %zd\n",
                i,
                (int)(2 + sizeof(void*) * 2),
                callstack[i],
                status == 0 ? demangled : info.dli_sname,
                (char *)callstack[i] - (char *)info.dli_saddr
            );
            free(demangled);
        } else {
            std::snprintf(buf, sizeof(buf), "%-3d %*p\n",
                i, (int)(2 + sizeof(void*) * 2), callstack[i]);
        }
        trace_buf << buf;
        std::snprintf(buf, sizeof(buf), "%s\n", symbols[i]);
        trace_buf << buf;
    }
    free(symbols);
    if (nFrames == nMaxFrames)
        trace_buf << "[truncated]\n";
    return trace_buf.str();
}

void my_func_2(void) {
    std::cout << backtrace() << std::endl;
}

void my_func_1(double f) {
    (void)f;
    my_func_2();
}

void my_func_1(int i) {
    (void)i;
    my_func_2();
}

int main() {
    my_func_1(1);
    my_func_1(2.0);
}

Compile and run:

g++ -fno-pie -ggdb3 -O0 -no-pie -o glibc_ldl.out -std=c++11 -Wall -Wextra \
  -pedantic-errors -fpic glibc_ldl.cpp -export-dynamic -ldl
./glibc_ldl.out 

output:

1             0x40130a my_func_2() + 41
./glibc_ldl.out(_Z9my_func_2v+0x29) [0x40130a]
2             0x40139e my_func_1(int) + 16
./glibc_ldl.out(_Z9my_func_1i+0x10) [0x40139e]
3             0x4013b3 main + 18
./glibc_ldl.out(main+0x12) [0x4013b3]
4       0x7f7594552b97 __libc_start_main + 231
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xe7) [0x7f7594552b97]
5             0x400f3a _start + 42
./glibc_ldl.out(_start+0x2a) [0x400f3a]

1             0x40130a my_func_2() + 41
./glibc_ldl.out(_Z9my_func_2v+0x29) [0x40130a]
2             0x40138b my_func_1(double) + 18
./glibc_ldl.out(_Z9my_func_1d+0x12) [0x40138b]
3             0x4013c8 main + 39
./glibc_ldl.out(main+0x27) [0x4013c8]
4       0x7f7594552b97 __libc_start_main + 231
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xe7) [0x7f7594552b97]
5             0x400f3a _start + 42
./glibc_ldl.out(_start+0x2a) [0x400f3a]

Tested on Ubuntu 18.04.

glibc backtrace with C++ demangling hack 2: parse backtrace output

Shown at: https://panthema.net/2008/0901-stacktrace-demangled/

This is a hack because it requires parsing.

TODO get it to compile and show it here.

libunwind

TODO does this have any advantage over glibc backtrace? Very similar output, also requires modifying the build command, but not part of glibc so requires an extra package installation.

Code adapted from: https://eli.thegreenplace.net/2015/programmatic-access-to-the-call-stack-in-c/

main.c

/* This must be on top. */
#define _XOPEN_SOURCE 700

#include <stdio.h>
#include <stdlib.h>

/* Paste this on the file you want to debug. */
#define UNW_LOCAL_ONLY
#include <libunwind.h>
#include <stdio.h>
void print_trace() {
    char sym[256];
    unw_context_t context;
    unw_cursor_t cursor;
    unw_getcontext(&context);
    unw_init_local(&cursor, &context);
    while (unw_step(&cursor) > 0) {
        unw_word_t offset, pc;
        unw_get_reg(&cursor, UNW_REG_IP, &pc);
        if (pc == 0) {
            break;
        }
        printf("0x%lx:", pc);
        if (unw_get_proc_name(&cursor, sym, sizeof(sym), &offset) == 0) {
            printf(" (%s+0x%lx)\n", sym, offset);
        } else {
            printf(" -- error: unable to obtain symbol name for this frame\n");
        }
    }
    puts("");
}

void my_func_3(void) {
    print_trace();
}

void my_func_2(void) {
    my_func_3();
}

void my_func_1(void) {
    my_func_3();
}

int main(void) {
    my_func_1(); /* line 46 */
    my_func_2(); /* line 47 */
    return 0;
}

Compile and run:

sudo apt-get install libunwind-dev
gcc -fno-pie -ggdb3 -O3 -no-pie -o main.out -std=c99 \
  -Wall -Wextra -pedantic-errors main.c -lunwind

Either #define _XOPEN_SOURCE 700 must be on top, or we must use -std=gnu99:

• Is the type `stack_t` no longer defined on linux?
• Glibc - error in ucontext.h, but only with -std=c11

Run:

./main.out

Output:

0x4007db: (main+0xb)
0x7f4ff50aa830: (__libc_start_main+0xf0)
0x400819: (_start+0x29)

0x4007e2: (main+0x12)
0x7f4ff50aa830: (__libc_start_main+0xf0)
0x400819: (_start+0x29)

and:

addr2line -e main.out 0x4007db 0x4007e2

gives:

/home/ciro/main.c:34
/home/ciro/main.c:49

With -O0:

0x4009cf: (my_func_3+0xe)
0x4009e7: (my_func_1+0x9)
0x4009f3: (main+0x9)
0x7f7b84ad7830: (__libc_start_main+0xf0)
0x4007d9: (_start+0x29)

0x4009cf: (my_func_3+0xe)
0x4009db: (my_func_2+0x9)
0x4009f8: (main+0xe)
0x7f7b84ad7830: (__libc_start_main+0xf0)
0x4007d9: (_start+0x29)

and:

addr2line -e main.out 0x4009f3 0x4009f8

gives:

/home/ciro/main.c:47
/home/ciro/main.c:48

Tested on Ubuntu 16.04, GCC 6.4.0, libunwind 1.1.

libunwind with C++ name demangling

Code adapted from: https://eli.thegreenplace.net/2015/programmatic-access-to-the-call-stack-in-c/

unwind.cpp

#define UNW_LOCAL_ONLY
#include <cxxabi.h>
#include <libunwind.h>
#include <cstdio>
#include <cstdlib>
#include <iostream>

void backtrace() {
  unw_cursor_t cursor;
  unw_context_t context;

  // Initialize cursor to current frame for local unwinding.
  unw_getcontext(&context);
  unw_init_local(&cursor, &context);

  // Unwind frames one by one, going up the frame stack.
  while (unw_step(&cursor) > 0) {
    unw_word_t offset, pc;
    unw_get_reg(&cursor, UNW_REG_IP, &pc);
    if (pc == 0) {
      break;
    }
    std::printf("0x%lx:", pc);

    char sym[256];
    if (unw_get_proc_name(&cursor, sym, sizeof(sym), &offset) == 0) {
      char* nameptr = sym;
      int status;
      char* demangled = abi::__cxa_demangle(sym, nullptr, nullptr, &status);
      if (status == 0) {
        nameptr = demangled;
      }
      std::printf(" (%s+0x%lx)\n", nameptr, offset);
      std::free(demangled);
    } else {
      std::printf(" -- error: unable to obtain symbol name for this frame\n");
    }
  }
}

void my_func_2(void) {
    backtrace();
    std::cout << std::endl; // line 43
}

void my_func_1(double f) {
    (void)f;
    my_func_2();
}

void my_func_1(int i) {
    (void)i;
    my_func_2();
}  // line 54

int main() {
    my_func_1(1);
    my_func_1(2.0);
}

Compile and run:

sudo apt-get install libunwind-dev
g++ -fno-pie -ggdb3 -O0 -no-pie -o unwind.out -std=c++11 \
  -Wall -Wextra -pedantic-errors unwind.cpp -lunwind -pthread
./unwind.out

Output:

0x400c80: (my_func_2()+0x9)
0x400cb7: (my_func_1(int)+0x10)
0x400ccc: (main+0x12)
0x7f4c68926b97: (__libc_start_main+0xe7)
0x400a3a: (_start+0x2a)

0x400c80: (my_func_2()+0x9)
0x400ca4: (my_func_1(double)+0x12)
0x400ce1: (main+0x27)
0x7f4c68926b97: (__libc_start_main+0xe7)
0x400a3a: (_start+0x2a)

and then we can find the lines of my_func_2 and my_func_1(int) with:

addr2line -e unwind.out 0x400c80 0x400cb7

which gives:

/home/ciro/test/unwind.cpp:43
/home/ciro/test/unwind.cpp:54

TODO: why are the lines off by one?

Tested on Ubuntu 18.04, GCC 7.4.0, libunwind 1.2.1.

GDB automation

We can also do this with GDB without recompiling by using: How to do an specific action when a certain breakpoint is hit in GDB?

Although if you are going to print the backtrace a lot, this will likely be less fast than the other options, but maybe we can reach native speeds with compile code, but I'm lazy to test it out now: How to call assembly in gdb?

main.cpp

void my_func_2(void) {}

void my_func_1(double f) {
    my_func_2();
}

void my_func_1(int i) {
    my_func_2();
}

int main() {
    my_func_1(1);
    my_func_1(2.0);
}

main.gdb

start
break my_func_2
commands
  silent
  backtrace
  printf "\n"
  continue
end
continue

Compile and run:

g++ -ggdb3 -o main.out main.cpp
gdb -nh -batch -x main.gdb main.out

Output:

Temporary breakpoint 1 at 0x1158: file main.cpp, line 12.

Temporary breakpoint 1, main () at main.cpp:12
12          my_func_1(1);
Breakpoint 2 at 0x555555555129: file main.cpp, line 1.
#0  my_func_2 () at main.cpp:1
#1  0x0000555555555151 in my_func_1 (i=1) at main.cpp:8
#2  0x0000555555555162 in main () at main.cpp:12

#0  my_func_2 () at main.cpp:1
#1  0x000055555555513e in my_func_1 (f=2) at main.cpp:4
#2  0x000055555555516f in main () at main.cpp:13

[Inferior 1 (process 14193) exited normally]

TODO I wanted to do this with just -ex from the command line to not have to create main.gdb but I couldn't get the commands to work there.

Tested in Ubuntu 19.04, GDB 8.2.

Linux kernel

How to print the current thread stack trace inside the Linux kernel?

libdwfl

This was originally mentioned at: https://stackoverflow.com/a/60713161/895245 and it might be the best method, but I have to benchmark a bit more, but please go upvote that answer.

TODO: I tried to minimize the code in that answer, which was working, to a single function, but it is segfaulting, let me know if anyone can find why.

dwfl.cpp

#include <cassert>
#include <iostream>
#include <memory>
#include <sstream>
#include <string>

#include <cxxabi.h> // __cxa_demangle
#include <elfutils/libdwfl.h> // Dwfl*
#include <execinfo.h> // backtrace
#include <unistd.h> // getpid

// https://stackoverflow.com/questions/281818/unmangling-the-result-of-stdtype-infoname
std::string demangle(const char* name) {
    int status = -4;
    std::unique_ptr<char, void(*)(void*)> res {
        abi::__cxa_demangle(name, NULL, NULL, &status),
        std::free
    };
    return (status==0) ? res.get() : name ;
}

std::string debug_info(Dwfl* dwfl, void* ip) {
    std::string function;
    int line = -1;
    char const* file;
    uintptr_t ip2 = reinterpret_cast<uintptr_t>(ip);
    Dwfl_Module* module = dwfl_addrmodule(dwfl, ip2);
    char const* name = dwfl_module_addrname(module, ip2);
    function = name ? demangle(name) : "<unknown>";
    if (Dwfl_Line* dwfl_line = dwfl_module_getsrc(module, ip2)) {
        Dwarf_Addr addr;
        file = dwfl_lineinfo(dwfl_line, &addr, &line, nullptr, nullptr, nullptr);
    }
    std::stringstream ss;
    ss << ip << ' ' << function;
    if (file)
        ss << " at " << file << ':' << line;
    ss << std::endl;
    return ss.str();
}

std::string stacktrace() {
    // Initialize Dwfl.
    Dwfl* dwfl = nullptr;
    {
        Dwfl_Callbacks callbacks = {};
        char* debuginfo_path = nullptr;
        callbacks.find_elf = dwfl_linux_proc_find_elf;
        callbacks.find_debuginfo = dwfl_standard_find_debuginfo;
        callbacks.debuginfo_path = &debuginfo_path;
        dwfl = dwfl_begin(&callbacks);
        assert(dwfl);
        int r;
        r = dwfl_linux_proc_report(dwfl, getpid());
        assert(!r);
        r = dwfl_report_end(dwfl, nullptr, nullptr);
        assert(!r);
        static_cast<void>(r);
    }

    // Loop over stack frames.
    std::stringstream ss;
    {
        void* stack[512];
        int stack_size = ::backtrace(stack, sizeof stack / sizeof *stack);
        for (int i = 0; i < stack_size; ++i) {
            ss << i << ": ";

            // Works.
            ss << debug_info(dwfl, stack[i]);

#if 0
            // TODO intended to do the same as above, but segfaults,
            // so possibly UB In above function that does not blow up by chance?
            void *ip = stack[i];
            std::string function;
            int line = -1;
            char const* file;
            uintptr_t ip2 = reinterpret_cast<uintptr_t>(ip);
            Dwfl_Module* module = dwfl_addrmodule(dwfl, ip2);
            char const* name = dwfl_module_addrname(module, ip2);
            function = name ? demangle(name) : "<unknown>";
            // TODO if I comment out this line it does not blow up anymore.
            if (Dwfl_Line* dwfl_line = dwfl_module_getsrc(module, ip2)) {
              Dwarf_Addr addr;
              file = dwfl_lineinfo(dwfl_line, &addr, &line, nullptr, nullptr, nullptr);
            }
            ss << ip << ' ' << function;
            if (file)
                ss << " at " << file << ':' << line;
            ss << std::endl;
#endif
        }
    }
    dwfl_end(dwfl);
    return ss.str();
}

void my_func_2() {
    std::cout << stacktrace() << std::endl;
    std::cout.flush();
}

void my_func_1(double f) {
    (void)f;
    my_func_2();
}

void my_func_1(int i) {
    (void)i;
    my_func_2();
}

int main(int argc, char **argv) {
    long long unsigned int n;
    if (argc > 1) {
        n = strtoul(argv[1], NULL, 0);
    } else {
        n = 1;
    }
    for (long long unsigned int i = 0; i < n; ++i) {
        my_func_1(1);
        my_func_1(2.0);
    }
}

Compile and run:

sudo apt install libdw-dev
g++ -fno-pie -ggdb3 -O0 -no-pie -o dwfl.out -std=c++11 -Wall -Wextra -pedantic-errors dwfl.cpp -ldw
./dwfl.out

Output:

0: 0x402b74 stacktrace[abi:cxx11]() at /home/ciro/test/dwfl.cpp:65
1: 0x402ce0 my_func_2() at /home/ciro/test/dwfl.cpp:100
2: 0x402d7d my_func_1(int) at /home/ciro/test/dwfl.cpp:112
3: 0x402de0 main at /home/ciro/test/dwfl.cpp:123
4: 0x7f7efabbe1e3 __libc_start_main at ../csu/libc-start.c:342
5: 0x40253e _start at ../csu/libc-start.c:-1

0: 0x402b74 stacktrace[abi:cxx11]() at /home/ciro/test/dwfl.cpp:65
1: 0x402ce0 my_func_2() at /home/ciro/test/dwfl.cpp:100
2: 0x402d66 my_func_1(double) at /home/ciro/test/dwfl.cpp:107
3: 0x402df1 main at /home/ciro/test/dwfl.cpp:121
4: 0x7f7efabbe1e3 __libc_start_main at ../csu/libc-start.c:342
5: 0x40253e _start at ../csu/libc-start.c:-1

Benchmark run:

g++ -fno-pie -ggdb3 -O3 -no-pie -o dwfl.out -std=c++11 -Wall -Wextra -pedantic-errors dwfl.cpp -ldw
time ./dwfl.out 1000 >/dev/null

Output:

real    0m3.751s
user    0m2.822s
sys     0m0.928s

So we see that this method is 10x faster than Boost's stacktrace, and might therefore be applicable to more use cases.

Tested in Ubuntu 19.10 amd64, libdw-dev 0.176-1.1.

See also

• How can one grab a stack trace in C?
• How to make backtrace()/backtrace_symbols() print the function names?
• Is there a portable/standard-compliant way to get filenames and linenumbers in a stack trace?
• Best way to invoke gdb from inside program to print its stacktrace?
• automatic stack trace on failure:
  • on C++ exception: C++ display stack trace on exception
  • generic: How to automatically generate a stacktrace when my program crashes

I notice you are using windows, which is particularly bad about using low port numbers for outgoing sockets. See here for how to reserve the port number that you want to rely on using for glassfish.

Other people have asked this kind of question before (though I don't see any obvious dupes here right now).

I think the answer is that the keydown event (and its twin keyup) are all the info you get. Repeating is wired pretty firmly into the operating system, and an application program doesn't get much of an opportunity to query the BIOS for the actual state of the key.

What you can do, and perhaps have to if you need to get this working, is to programmatically de-bounce the key. Essentially, you can evaluate keydown and keyup yourself but ignore a keyupevent if it takes place too quickly after the last keydown... or essentially, you should delay your response to keyup long enough to be sure there's not another keydown event following with something like 0.25 seconds of the keyup.

This would involve using a timer activity, and recording the millisecond times for previous events. I can't say it's a very appealing solution, but...

To answer Janus Troelsen comment

Use UNIX_TIMESTAMP instead of TIMESTAMP

SELECT from_unixtime( UNIX_TIMESTAMP(  "2011-12-01 22:01:23.048" ) )

The TIMESTAMP function returns a Date or a DateTime and not a timestamp, while UNIX_TIMESTAMP returns a unix timestamp

Try changing your Content Type (media type) to application/x-download and your Content-Disposition to: attachment;filename=" + fileName;

response.setContentType("application/x-download");
response.setHeader("Content-disposition", "attachment; filename=" + fileName);

You need to add a new service for DBcontext in the startup

Default

services.AddDbContext<ApplicationDbContext>(options =>
                options.UseSqlServer(
                    Configuration.GetConnectionString("DefaultConnection")));

Add this

services.AddDbContext<NewDBContext>(options =>
                options.UseSqlServer(
                    Configuration.GetConnectionString("NewConnection")));

As I haven't seen any full answers for Python 2.7, I'll outline the two important steps and an optional step that is quite useful.

1. You need a font with Unicode support. Windows comes with Lucida Console which may be selected by right-clicking the title bar of command prompt and clicking the Defaults option. This also gives access to colours. Note that you can also change settings for command windows invoked in certain ways (e.g, open here, Visual Studio) by choosing Properties instead.
2. You need to set the code page to cp65001, which appears to be Microsoft's attempt to offer UTF-7 and UTF-8 support to command prompt. Do this by running chcp 65001 in command prompt. Once set, it remains this way until the window is closed. You'll need to redo this every time you launch cmd.exe.

For a more permanent solution, refer to this answer on Super User. In short, create a REG_SZ (String) entry using regedit at HKEY_LOCAL_MACHINE\Software\Microsoft\Command Processor and name it AutoRun. Change the value of it to chcp 65001. If you don't want to see the output message from the command, use @chcp 65001>nul instead.

Some programs have trouble interacting with this encoding, MinGW being a notable one that fails while compiling with a nonsensical error message. Nonetheless, this works very well and doesn't cause bugs with the majority of programs.

I have added line

$this->_productCollection->addAttributeToSelect('releasedate');

in

app/code/core/Mage/Catalog/Block/Product/List.php on line 95

in function _getProductCollection()

and then call it in

app/design/frontend/default/hellopress/template/catalog/product/list.phtml

By writing code

<div><?php echo $this->__('Release Date: %s', $this->dateFormat($_product->getReleasedate())) ?>
</div>

Now it is working in Magento 1.4.x

Simply pass the desired value as first argument, like 0, math.inf or, here, np.nan. The constructor then initializes and fills the value array to the size specified by arguments index and columns:

>>> import numpy as np
>>> import pandas as pd
>>> df = pd.DataFrame(np.nan, index=[0, 1, 2, 3], columns=['A', 'B'])

>>> df.dtypes
A    float64
B    float64
dtype: object

>>> df.values
array([[nan, nan],
       [nan, nan],
       [nan, nan],
       [nan, nan]])

If the solutions proposed here aren't working for you, and your image asset is actually a PDF, note that XCode actually treats PDFs differently than image files. In particular, it doesn't seem able to scale to fill properly with a PDF: it ends up tiled instead. This drove me crazy until I figured out that the issue was the PDF format. Convert to JPG and you should be good to go.

It's easy just add the name which you want to use in quotes before adding vector

a_matrix <- cbind(b_matrix,'Name-Change'= c_vector)

When you use a HashSet (or a HashMap) data are stored in "buckets" based on the hash of your object. This way your data is easier to access because you don't have to look for this particular data in the whole Set, you just have to look in the right bucket.

This way you can increase performances on specific points.

Each Collection implementation have its particularity to make it better to use in a certain condition. Each of those particularities have a cost. So if you don't really need it (for example the insertion order) you better use an implementation which doesn't offer it and fits better to your requirements.

Bootstrap modal show event

$('#modal-content').on('show.bs.modal', function() {
$("#txtname").focus();

})

I know its too longtime to reply but just as an information purpose for future readers:

WebRequest

System.Object
    System.MarshalByRefObject
        System.Net.WebRequest

The WebRequest is an abstract base class. So you actually don't use it directly. You use it through it derived classes - HttpWebRequest and FileWebRequest.

You use Create method of WebRequest to create an instance of WebRequest. GetResponseStream returns data stream.

There are also FileWebRequest and FtpWebRequest classes that inherit from WebRequest. Normally, you would use WebRequest to, well, make a request and convert the return to either HttpWebRequest, FileWebRequest or FtpWebRequest, depend on your request. Below is an example:

Example:

var _request = (HttpWebRequest)WebRequest.Create("http://stackverflow.com");
var _response = (HttpWebResponse)_request.GetResponse();

WebClient

System.Object
        System.MarshalByRefObject
            System.ComponentModel.Component
                System.Net.WebClient

WebClient provides common operations to sending and receiving data from a resource identified by a URI. Simply, it’s a higher-level abstraction of HttpWebRequest. This ‘common operations’ is what differentiate WebClient from HttpWebRequest, as also shown in the sample below:

Example:

var _client = new WebClient();
var _stackContent = _client.DownloadString("http://stackverflow.com");

There are also DownloadData and DownloadFile operations under WebClient instance. These common operations also simplify code of what we would normally do with HttpWebRequest. Using HttpWebRequest, we have to get the response of our request, instantiate StreamReader to read the response and finally, convert the result to whatever type we expect. With WebClient, we just simply call DownloadData, DownloadFile or DownloadString.

However, keep in mind that WebClient.DownloadString doesn’t consider the encoding of the resource you requesting. So, you would probably end up receiving weird characters if you don’t specify and encoding.

NOTE: Basically "WebClient takes few lines of code as compared to Webrequest"

If you want to use @Html.EditorFor() you have to use jQuery ui and update your Asp.net Mvc to 5.2.6.0 with NuGet Package Manager.

@Html.EditorFor(m => m.EntryDate, new { htmlAttributes = new { @class = "datepicker" } })

@section Scripts {

@Scripts.Render("~/bundles/jqueryval")

<script>

    $(document).ready(function(){

      $('.datepicker').datepicker();

     });

</script>

}

stay true to native (Boolean) property support and its powerful syntax like:

[elem].disabled = condition ? true : false; //done!

and for our own good collective coding experience, -please insist on others to support it as well.

There are many way you can do this. Those are given bellow:

Suppose your original number is given bellow: double number = 2354548.235;

Using NumberFormat and Rounding mode

NumberFormat nf = DecimalFormat.getInstance(Locale.ENGLISH);
    DecimalFormat decimalFormatter = (DecimalFormat) nf;
    decimalFormatter.applyPattern("#,###,###.##");
    decimalFormatter.setRoundingMode(RoundingMode.CEILING);

    String fString = decimalFormatter.format(number);
    System.out.println(fString);

Using String formatter

System.out.println(String.format("%1$,.2f", number));

In all cases the output will be: 2354548.24

Note:

During rounding you can add RoundingMode in your formatter. Here are some Rounding mode given bellow:

    decimalFormat.setRoundingMode(RoundingMode.CEILING);
    decimalFormat.setRoundingMode(RoundingMode.FLOOR);
    decimalFormat.setRoundingMode(RoundingMode.HALF_DOWN);
    decimalFormat.setRoundingMode(RoundingMode.HALF_UP);
    decimalFormat.setRoundingMode(RoundingMode.UP);

Here are the imports:

import java.math.BigDecimal;
import java.math.RoundingMode;
import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.util.Locale;

Just extends your Adapter like below

public class RankingAdapter extends AnimatedRecyclerView<RankingAdapter.ViewHolder> 

And add super method to onBindViewHolder

@Override
    public void onBindViewHolder(ViewHolder holder, final int position) {
        super.onBindViewHolder(holder, position);

It's automate way to create animated adapter like "Basheer AL-MOMANI"

import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.Animation;
import android.view.animation.ScaleAnimation;

import java.util.Random;

/**
 * Created by eliaszkubala on 24.02.2017.
 */
public class AnimatedRecyclerView<T extends RecyclerView.ViewHolder> extends RecyclerView.Adapter<T> {


    @Override
    public T onCreateViewHolder(ViewGroup parent, int viewType) {
        return null;
    }

    @Override
    public void onBindViewHolder(T holder, int position) {
        setAnimation(holder.itemView, position);
    }

    @Override
    public int getItemCount() {
        return 0;
    }

    protected int mLastPosition = -1;

    protected void setAnimation(View viewToAnimate, int position) {
        if (position > mLastPosition) {
            ScaleAnimation anim = new ScaleAnimation(0.0f, 1.0f, 0.0f, 1.0f, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);
            anim.setDuration(new Random().nextInt(501));//to make duration random number between [0,501)
            viewToAnimate.startAnimation(anim);
            mLastPosition = position;
        }
    }

}

Update - I verified the below works. Maybe the creation of your JArray isn't quite right.

[TestMethod]
    public void TestJson()
    {
        var jsonString = @"{""trends"": [
              {
                ""name"": ""Croke Park II"",
                ""url"": ""http://twitter.com/search?q=%22Croke+Park+II%22"",
                ""promoted_content"": null,
                ""query"": ""%22Croke+Park+II%22"",
                ""events"": null
              },
              {
                ""name"": ""Siptu"",
                ""url"": ""http://twitter.com/search?q=Siptu"",
                ""promoted_content"": null,
                ""query"": ""Siptu"",
                ""events"": null
              },
              {
                ""name"": ""#HNCJ"",
                ""url"": ""http://twitter.com/search?q=%23HNCJ"",
                ""promoted_content"": null,
                ""query"": ""%23HNCJ"",
                ""events"": null
              },
              {
                ""name"": ""Boston"",
                ""url"": ""http://twitter.com/search?q=Boston"",
                ""promoted_content"": null,
                ""query"": ""Boston"",
                ""events"": null
              },
              {
                ""name"": ""#prayforboston"",
                ""url"": ""http://twitter.com/search?q=%23prayforboston"",
                ""promoted_content"": null,
                ""query"": ""%23prayforboston"",
                ""events"": null
              },
              {
                ""name"": ""#TheMrsCarterShow"",
                ""url"": ""http://twitter.com/search?q=%23TheMrsCarterShow"",
                ""promoted_content"": null,
                ""query"": ""%23TheMrsCarterShow"",
                ""events"": null
              },
              {
                ""name"": ""#Raw"",
                ""url"": ""http://twitter.com/search?q=%23Raw"",
                ""promoted_content"": null,
                ""query"": ""%23Raw"",
                ""events"": null
              },
              {
                ""name"": ""Iran"",
                ""url"": ""http://twitter.com/search?q=Iran"",
                ""promoted_content"": null,
                ""query"": ""Iran"",
                ""events"": null
              },
              {
                ""name"": ""#gaa"",
                ""url"": ""http://twitter.com/search?q=%23gaa"",
                ""promoted_content"": null,
                ""query"": ""gaa"",
                ""events"": null
              },
              {
                ""name"": ""Facebook"",
                ""url"": ""http://twitter.com/search?q=Facebook"",
                ""promoted_content"": null,
                ""query"": ""Facebook"",
                ""events"": null
              }]}";

        var twitterObject = JToken.Parse(jsonString);
        var trendsArray = twitterObject.Children<JProperty>().FirstOrDefault(x => x.Name == "trends").Value;


        foreach (var item in trendsArray.Children())
        {
            var itemProperties = item.Children<JProperty>();
            //you could do a foreach or a linq here depending on what you need to do exactly with the value
            var myElement = itemProperties.FirstOrDefault(x => x.Name == "url");
            var myElementValue = myElement.Value; ////This is a JValue type
        }
    }

So call Children on your JArray to get each JObject in JArray. Call Children on each JObject to access the objects properties.

foreach(var item in yourJArray.Children())
{
    var itemProperties = item.Children<JProperty>();
    //you could do a foreach or a linq here depending on what you need to do exactly with the value
    var myElement = itemProperties.FirstOrDefault(x => x.Name == "url");
    var myElementValue = myElement.Value; ////This is a JValue type
}

I believe you can manipulate it with the overflow CSS attribute, but they have limited browser support. One source said it was Internet Explorer 5 (and later), Firefox 1.5 (and later), and Safari 3 (and later) - maybe enough for your purposes.

Scrolling, Scrolling, Scrolling has a good discussion.

You can use jQuery's $.map.

var foo = { 'alpha' : 'puffin', 'beta' : 'beagle' },
keys = $.map(foo, function(v, i){
  return i;
});

If you want to disable client side validation for a form in HTML5 add a novalidate attribute to the form element. Ex:

<form method="post" action="/foo" novalidate>...</form>

See https://www.w3.org/TR/html5/sec-forms.html#element-attrdef-form-novalidate

The answers that suggest git pull or git fetch are correct.
The message is generated when git status sees a difference between .git/FETCH_HEAD and .git/refs/remotes/<repository>/<branch> (e.g. .git/refs/remotes/origin/master).

The latter file records the HEAD from the last fetch (for the repository/branch). Doing git fetch updates both files to the branch's current HEAD.
Of course if there is nothing to fetch (because the local repository is already up-to-date) then .git/FETCH_HEAD doesn't change.

I use this solution with multiple elements with the same behavior in the same page:

$("html").click(function(event){
    var otarget = $(event.target);
    if (!otarget.parents('#id_of element').length && otarget.attr('id')!="id_of element" && !otarget.parents('#id_of_activator').length) {
        $('#id_of element').hide();
    }
});

stopPropagation() is a bad idea, this breaks standard behaviour of many things, including buttons and links.

CMake can generate really nice Visual Studio .projs/.slns, but there is always the problem with the need to modify the .cmake files rather than .proj/.sln. As it is now, we are dealing with it as follows:

1. All source files go to /src and files visible in Visual Studio are just "links" to them defined in .filter.
2. Programmer adds/deletes files remembering to work on the defined /src directory, not the default project's one.
3. When he's done, he run a script that "refreshes" the respective .cmake files.
4. He checks if the code can be built in the recreated environment.
5. He commits the code.

At first we were a little afraid of how it will turn out, but the workflow works really well and with nice diff visible before each commit, everyone can easily see if his changes were correctly mapped in .cmake files.

One more important thing to know about is the lack of support (afaik) for "Solution Configurations" in CMake. As it stands, you have to generate two directories with projects/solutions - one for each build type (debug, release, etc.). There is no direct support for more sophisticated features - in other words: switching between configurations won't give you what you might expect.

Open the CSV file with a decent text editor like Notepad++ and add the following text in the first line:

sep=,

Now open it with excel again.

This will set the separator as a comma, or you can change it to whatever you need.

I resolved this problem, searching the dll's file in C:\Windows\assembly\GAC_MSIL\ and copied to bin directory of the proyect deployed. That work for me.

Your diameter variable won't work because you're trying to store a String into a variable that will only accept a double. In order for it to work you will need to parse it

Ex:

diameter = Double.parseDouble(JOptionPane.showInputDialog("enter the diameter of a sphere.");

Use:

window.location.reload();

The math library must be linked in when building the executable. How to do this varies by environment, but in Linux/Unix, just add -lm to the command:

gcc test.c -o test -lm

The math library is named libm.so, and the -l command option assumes a lib prefix and .a or .so suffix.

I had a similar issue.

In my case the solution was to remove a deprecated version of docker. This I assume was causing some conflicts.

On ubuntu:

sudo apt remove docker

solved the problem for me

http://licenseplate.sourceforge.net Python (I have not tested it)

If you are using the 'pylab' for interactive plotting you can set the labelsize at creation time with pylab.ylabel('Example', fontsize=40).

If you use pyplot programmatically you can either set the fontsize on creation with ax.set_ylabel('Example', fontsize=40) or afterwards with ax.yaxis.label.set_size(40).

The fix is really simple: just replace YOUR_API_KEY on the last line of your code with your actual API key!

If you don't have one, you can get it for free on the Google Developers Website.

With the release of angular 2.0.0-rc.5 NgModule was introduced. The previous solution stopped working for me. This is what I did to fix it:

app.module.ts:

@NgModule({        
  providers: [
    { provide: 'Window',  useValue: window }
  ],
  declarations: [...],
  imports: [...]
})
export class AppModule {}

In some component:

import { Component, Inject } from '@angular/core';

@Component({...})
export class MyComponent {
    constructor (@Inject('Window') window: Window) {}
}

You could also use an OpaqueToken instead of the string 'Window'

Edit:

The AppModule is used to bootstrap your application in main.ts like this:

import { platformBrowserDynamic  } from '@angular/platform-browser-dynamic';
import { AppModule } from './app/app.module';

platformBrowserDynamic().bootstrapModule(AppModule)

For more information about NgModule read the Angular 2 documentation: https://angular.io/docs/ts/latest/guide/ngmodule.html

Or you have to rebuild the cv2 module for win 64bit.

date = '2012-07-28'; stringdate = new Date(date).toISOString();

ought to work in most newer browsers. it returns 2012-07-28T00:00:00.000Z on Firefox 6.0

I know that this thread is quite old, however, I am missing here one option. If you have metadata (in any format) that you want to send along with the data to upload, you can make a single multipart/related request.

The Multipart/Related media type is intended for compound objects consisting of several inter-related body parts.

You can check RFC 2387 specification for more in-depth details.

Basically each part of such a request can have content with different type and all parts are somehow related (e.g. an image and it metadata). The parts are identified by a boundary string, and the final boundary string is followed by two hyphens.

Example:

POST /upload HTTP/1.1
Host: www.hostname.com
Content-Type: multipart/related; boundary=xyz
Content-Length: [actual-content-length]

--xyz
Content-Type: application/json; charset=UTF-8

{
    "name": "Sample image",
    "desc": "...",
    ...
}

--xyz
Content-Type: image/jpeg

[image data]
[image data]
[image data]
...
--foo_bar_baz--

Go to File>Project Structure>JDK location: Here, you have to set the directory path exactly same, in which you have installed the java version. Also, you have to mention the paths of SDK for project run on emulator successfully.

Why This Problem Occurs: It is due to the unsynchronized java version directory that should be available to Android Studio for java code compilance.

1. You should add L: long i = 12345678910L;.
2. Yes.

BTW: it doesn't have to be an upper case L, but lower case is confused with 1 many times :).

You can use the row_numer() over(partition by ...) syntax like so:

select * from
(
select *
, ROW_NUMBER() OVER(PARTITION BY CName ORDER BY AddressLine) AS row
from myTable
) as a
where row = 1

What this does is that it creates a column called row, which is a counter that increments every time it sees the same CName, and indexes those occurrences by AddressLine. By imposing where row = 1, one can select the CName whose AddressLine comes first alphabetically. If the order by was desc, then it would pick the CName whose AddressLine comes last alphabetically.

I think this is the simplest solution. Pure shell builtins, no inline math. It borrows from previous answers.

Just substrings and the ${#...} meta-variable.

A="[>---------------------<]";

# Strip excess padding from the right
#

B="A very long header"; echo "${A:0:-${#B}} $B"
B="shrt hdr"          ; echo "${A:0:-${#B}} $B"

Produces

[>----- A very long header
[>--------------- shrt hdr


# Strip excess padding from the left
#

B="A very long header"; echo "${A:${#B}} $B"
B="shrt hdr"          ; echo "${A:${#B}} $B"

Produces

-----<] A very long header
---------------<] shrt hdr

If you don't want it to add it to a link, you can just enclose it within a span and that would work.

<span id='clickableAwesomeFont'><i class="fa fa-behance-square fa-4x"></span>

in your css, then you can:

#clickableAwesomeFont {
     cursor: pointer
}

Then in java script, you can just add a click handler.

In cases where it's actually not a link, I think this is much cleaner and using a link would be changing its semantics and abusing its meaning.

press Alt to seee the Menubar and then go to view - appearance and remove the check from the fullscreen option

This simple code would work: Check the console for results.

let scroll_position = 0;
let scroll_direction;

window.addEventListener('scroll', function(e){
    scroll_direction = (document.body.getBoundingClientRect()).top > scroll_position ? 'up' : 'down';
    scroll_position = (document.body.getBoundingClientRect()).top;
    console.log(scroll_direction);
});

I improved Salselvaprabu's answer in several ways:

1. It is now a function - you can put in your powershell profile and use anytime you need
2. It can accept host as hostname or as ip address
3. No more exceptions if host or port unavaible - just text

Call it like this:

Test-Port example.com 999
Test-Port 192.168.0.1 80

function Test-Port($hostname, $port)
{
    # This works no matter in which form we get $host - hostname or ip address
    try {
        $ip = [System.Net.Dns]::GetHostAddresses($hostname) | 
            select-object IPAddressToString -expandproperty  IPAddressToString
        if($ip.GetType().Name -eq "Object[]")
        {
            #If we have several ip's for that address, let's take first one
            $ip = $ip[0]
        }
    } catch {
        Write-Host "Possibly $hostname is wrong hostname or IP"
        return
    }
    $t = New-Object Net.Sockets.TcpClient
    # We use Try\Catch to remove exception info from console if we can't connect
    try
    {
        $t.Connect($ip,$port)
    } catch {}

    if($t.Connected)
    {
        $t.Close()
        $msg = "Port $port is operational"
    }
    else
    {
        $msg = "Port $port on $ip is closed, "
        $msg += "You may need to contact your IT team to open it. "                                 
    }
    Write-Host $msg
}

Just type perfmon into Start > Run and press enter. When the Performance window is open, click on the + sign to add new counters to the graph. The counters are different aspects of how your PC works and are grouped by similarity into groups called "Performance Object".

For your questions, you can choose the "Process", "Memory" and "Processor" performance objects. You then can see these counters in real time

You can also specify the utility to save the performance data for your inspection later. To do this, select "Performance Logs and Alerts" in the left-hand panel. (It's right under the System Monitor console which provides us with the above mentioned counters. If it is not there, click "File" > "Add/remove snap-in", click Add and select "Performance Logs and Alerts" in the list".) From the "Performance Logs and Alerts", create a new monitoring configuration under "Counter Logs". Then you can add the counters, specify the sampling rate, the log format (binary or plain text) and log location.

MySQL: In general, make necessary changes par your requirement:

UPDATE
    shopping_cart sc
    LEFT JOIN
    package pc ON sc. package_id = pc.id    
SET
    sc. amount = pc.amount

This question already has a great answer but in the spirit of exploring all possibilities here is another technique to reorder dom elements whilst still allowing them to take up their space, unlike the absolute positioning method.

This method works in all modern browsers and IE9+ (basically any browser that supports display:table) it has a drawback that it can only be used on a max of 3 siblings though.

//the html    
<div class='container'>
    <div class='div1'>1</div>
    <div class='div2'>2</div>
    <div class='div3'>3</div>
</div>

//the css
.container {
   display:table;    
}
.div1 {
    display:table-footer-group;
}
.div2 {
    display:table-header-group;
}
.div3 {
    display:table-row-group;
}

This will reorder the elements from 1,2,3 to 2,3,1. Basically anything with the display set to table-header-group will be positioned at the top and table-footer-group at the bottom. Naturally table-row-group puts an element in the middle.

This method is quick with good support and requires much less css than the flexbox approach so if you are only looking to swap a few items around for a mobile layout for example then dont rule out this technique.

You can check out a live demo on codepen: http://codepen.io/thepixelninja/pen/eZVgLx

Lets try downloading this in your eclipse on Mac you will be able to open multiple eclipse at a time Link

Name : macOS Eclipse Launcher

Steps :

1. Go to eclipse Market place.
2. Search for "macOS Eclipse Launcher" and install.
3. It will restart .
4. Now under file menu check for open option > there you will find other projects to open also at same time .

In python3, if you a string of b'bytes', with json you have to .decode() the content before you can load it. simplejson takes care of this so you can just do simplejson.loads(byte_string).

Python 2.7 does not implement the int.to- very slow_bytes() method.

I tried 3 methods:

1. hex unpack/pack : very slow
2. byte shifting 8 bits at a time: significantly faster.
3. using a "C" module and packing into the lower (7 ia64 or 3 i32) bytes. This was about twice as fast as 2/ . It is the fastest option, but still too slow.

All these methods are very inefficient for two reasons:

• Python 2.7 does not support this useful operation.
• c does not support extended precision arithmetic using the carry/borrow/overflow flags available on most platforms.

On OSX with a homebrew install the full path to the opencv folder should work:

face_cascade = cv2.CascadeClassifier('/usr/local/Cellar/opencv/3.4.0_1/share/OpenCV/haarcascades/haarcascade_frontalface_default.xml')
eye_cascade = cv2.CascadeClassifier('/usr/local/Cellar/opencv/3.4.0_1/share/OpenCV/haarcascades/haarcascade_eye.xml')

Take care of the version number in the path.

My method is similar to Curt's suggestion above about saving it as a tab-delimited file and re-importing. It assumes that your data has only values without formulas. This is probably a good assumption because the problem of "bad" blanks is caused by the confusion between blanks and nulls -- usually in the data imported from some other place -- so there shouldn't be any formulas. My method is to parse in place -- very similar to saving as a text file and re-importing, but you can do this without closing and re-opening the file. It's under Data > Text-to-Columns > delimited > remove all parsing characters (can also choose Text if you want) > Finish. This should cause Excel to re-recognize your data from scratch or from text and recognize blanks as really blank. You can automate this in a subroutine:

Sub F2Enter_new()         
   Dim rInput As Range
   If Selection.Cells.Count > 1 Then Set rInput = Selection
   Set rInput = Application.InputBox(Title:="Select", prompt:="input range", _ 
                                     Default:=rInput.Address, Type:=8)
'   Application.EnableEvents = False: Application.ScreenUpdating = False
   For Each c In rInput.Columns
      c.TextToColumns Destination:=Range(c.Cells(1).Address), DataType:=xlDelimited, _
      TextQualifier:=xlDoubleQuote, ConsecutiveDelimiter:=False, Tab:=False, _
      Semicolon:=False, Comma:=False, Space:=False, Other:=False, _
      FieldInfo:=Array(1, 1), TrailingMinusNumbers:=True
   Next c
   Application.EnableEvents = True: Application.ScreenUpdating = True
End Sub

You can also turn-on that one commented line to make this subroutine run "in the background". For this subroutine, it improves performance only slightly (for others, it can really help a lot). The name is F2Enter because the original manual method for fixing this "blanks" problem is to make Excel recognize the formula by pushing F2 and Enter.

I fear this might turn out to BE the long way round but could depend on how big your data set is – presumably more than four months for example.

Assuming your data is in ColumnA:C and has column labels in Row 1, also that Month is formatted mmm(this last for ease of sorting):

1. Sort the data by Name then Month
2. Enter in D2 =IF(AND(A2=A1,C2=C1),D1+1,1) (One way to deal with what is the tricky issue of multiple entries for the same person for the same month).
3. Create a pivot table from A1:D(last occupied row no.)
4. Say insert in F1.
5. Layout as in screenshot.

I’m hoping this would be adequate for your needs because pivot table should automatically update (provided range is appropriate) in response to additional data with refresh. If not (you hard taskmaster), continue but beware that the following steps would need to be repeated each time the source data changes.

5. Copy pivot table and Paste Special/Values to, say, L1.
6. Delete top row of copied range with shift cells up.
7. Insert new cell at L1 and shift down.
8. Key 'Name' into L1.
9. Filter copied range and for ColumnL, select Row Labels and numeric values.
10. Delete contents of L2:L(last selected cell)
11. Delete blank rows in copied range with shift cells up (may best via adding a column that counts all 12 months). Hopefully result should be as highlighted in yellow.

Happy to explain further/try again (I've not really tested this) if does not suit.

EDIT (To avoid second block of steps above and facilitate updating for source data changes)

.0. Before first step 2. add a blank row at the very top and move A2:D2 up.
.2. Adjust cell references accordingly (in D3 =IF(AND(A3=A2,C3=C2),D2+1,1).
.3. Create pivot table from A:D

.6. Overwrite Row Labels with Name.
.7. PivotTable Tools, Design, Report Layout, Show in Tabular Form and sort rows and columns A>Z.
.8. Hide Row1, ColumnG and rows and columns that show (blank).

Steps .0. and .2. in the edit are not required if the pivot table is in a different sheet from the source data (recommended).

Step .3. in the edit is a change to simplify the consequences of expanding the source data set. However introduces (blank) into pivot table that if to be hidden may need adjustment on refresh. So may be better to adjust source data range each time that changes instead: PivotTable Tools, Options, Change Data Source, Change Data Source, Select a table or range). In which case copy rather than move in .0.

There is a new feature in Directory and DirectoryInfo in .NET 4 that allows them to return an IEnumerable instead of an array, and start returning results before reading all the directory contents.

• What's New in the BCL in .NET 4 Beta 1
• Directory.EnumerateFileSystemEntries method overloads

public bool IsDirectoryEmpty(string path)
{
    IEnumerable<string> items = Directory.EnumerateFileSystemEntries(path);
    using (IEnumerator<string> en = items.GetEnumerator())
    {
        return !en.MoveNext();
    }
}

EDIT: seeing that answer again, I realize this code can be made much simpler...

public bool IsDirectoryEmpty(string path)
{
    return !Directory.EnumerateFileSystemEntries(path).Any();
}

If you only want to sort only on the 5th field then use -k5,5.

Also, use the -t command line switch to specify the delimiter to tab. Try this:

sort  -k5,5 -r -n -t \t filename

or if the above doesn't work (with the tab) this:

sort  -k5,5 -r -n -t $'\t' filename

The man page for sort states:

-t, --field-separator=SEP use SEP instead of non-blank to blank transition

Finally, this SO question Unix Sort with Tab Delimiter might be helpful.

I would like to share my thoughts as well, since I've bumped into the same issue.

Well, just answering the question would be:

1 - Add an extenssion to the observable collection class like this:

namespace YourNameSpace
{
    public static class ObservableCollectionExtension
    {
        public static void OrderByReference<T>(this ObservableCollection<T> collection, List<T> comparison)
        {
            for (int i = 0; i < comparison.Count; i++)
            {
                if (!comparison.ElementAt(i).Equals(collection.ElementAt(i)))
                    collection.Move(collection.IndexOf(comparison[i]), i);
            }
        }
        
        public static void InsertInPlace<T>(this ObservableCollection<T> collection, List<T> comparison, T item)
        {
            int index = comparison.IndexOf(item);
            comparison.RemoveAt(index);
            collection.OrderByReference(comparison);
            collection.Insert(index, item);
        }
    }
}

2 - Then use it like this:

_animals.OrderByReference(_animals.OrderBy(x => x).ToList());

This changes your ObservableCollection, you can use linq and it doesn't change the bindings!

Extra:

I've extended @Marco and @Contango answers to my own liking. First I thought of using a list directly as the comparison, so you would have this:

public static void OrderByReference<T>(this ObservableCollection<T> collection, List<T> comparison)
{
    for (int i = 0; i < comparison.Count; i++)
    {
        collection.Move(collection.IndexOf(comparison[i]), i);
    }
}

And using like this:

YourObservableCollection.OrderByReference(YourObservableCollection.DoYourLinqOrdering().ToList());

Then I've thought, since this always move everything and triggers the move in the ObservableCollection why not compare if the object is already in there, and this brings what I've put in the begining with the Equals comparator.

Adding the object to the correct place also sounded good, but I wanned a simple way to do it. So I've came up with that:

public static void InsertInPlace<T>(this ObservableCollection<T> collection, List<T> comparison, T item)
{
    collection.Insert(comparison.IndexOf(item), item);
}

You send a list with the new object where you want and also this new object, so you need to create a list, then add this new object, like this:

var YourList = YourObservableCollection.ToList();
var YourObject = new YourClass { ..... };
YourList.Add(YourObject);
YourObservableCollection.InsertInPlace(YourList.DoYourLinqOrdering().ToList(), YourObject);

But since the ObservableCollection could be in a different order than the list because of the selection in the "DoYourLinqOrdering()" (this would happen if the collection wasn't previously ordered) I've added the first extession (OrderByReference) in the insert as you can see in the begining of the answer. It will not take long if it doesn't need to move the itens arround, so I did't saw a problem in using it.

As performance goes, I've compared the methods by checking the time it takes for each to finish, so not ideal, but anyway, I've tested an observable collection with 20000 itens. For the OrderByReference I didn't saw great difference in the performance by adding the Equal object checker, but if not all itens need to be moved it is faster and it doesn't fire unecessary Move events on the collecitonChanged, so thats something. For the InsertInPlace is the same thing, if the ObservableCollection is already sorted, just checking if the objects are in the right place is faster than moving all the itens around, so there was not a huge difference in time if it is just passing through the Equals statement and you get the benefit of being sure everything is where it should be.

Be aware that if you use this extession with objects that dont mach or with a list that have more or less objects you will get an ArgumentOutOfRangeException or some other unexpect behaviour.

Hopes this helps somebody!

New XCode 7 will only require 'UIFileSharingEnabled' key in Info.plist. 'CFBundleDisplayName' is not required any more.

One more hint: do not only modify the Info.plist of the 'tests' target. The main app and the 'tests' have different Info.plist.

I found the answer:

$mail->AddEmbeddedImage('img/2u_cs_mini.jpg', 'logo_2u');

and on the <img> tag put src='cid:logo_2u'

You can copy your div like this

$(".package").html($(".button").html())

The EditorFor html helper does not have overloads that take HTML attributes. In this case, you need to use something more specific like TextBoxFor:

<div class="editor-field">
    @Html.TextBoxFor(model => model.userName, new 
        { disabled = "disabled", @readonly = "readonly" })
</div>

You can still use EditorFor, but you will need to have a TextBoxFor in a custom EditorTemplate:

public class MyModel
{
    [UIHint("userName")]
    public string userName { ;get; set; }
}

Then, in your Views/Shared/EditorTemplates folder, create a file userName.cshtml. In that file, put this:

@model string
@Html.TextBoxFor(m => m, new { disabled = "disabled", @readonly = "readonly" })

You actually can serve static files in a production Django app, securely and without DEBUG=True.

Rather than using Django itself, use dj_static in your WSGI file (github):

# requirements.txt:

...
dj-static==0.0.6


# YOURAPP/settings.py:

...
STATIC_ROOT = 'staticdir'
STATIC_URL = '/staticpath/'

# YOURAPP/wsgi.py:

...
from django.core.wsgi import get_wsgi_application
from dj_static import Cling

application = Cling(get_wsgi_application())

Find the largest number in a multidimensional array

var max = [];

for(var i=0; arr.length>i; i++ ) {

   var arra = arr[i];
   var largest = Math.max.apply(Math, arra);
   max.push(largest);
}
return max;

Try trimming the string to make sure there is no extra white space:

Cursor c = db.rawQuery("SELECT * FROM tbl1 WHERE TRIM(name) = '"+name.trim()+"'", null);

Also use c.moveToFirst() like @thinksteep mentioned.

This is a complete code for select statements.

SQLiteDatabase db = this.getReadableDatabase();
Cursor c = db.rawQuery("SELECT column1,column2,column3 FROM table ", null);
if (c.moveToFirst()){
    do {
        // Passing values 
        String column1 = c.getString(0);
        String column2 = c.getString(1);
        String column3 = c.getString(2); 
        // Do something Here with values
    } while(c.moveToNext());
}
c.close();
db.close();

In summary, two ways were introduced

1) using order by DBMS_RANDOM.VALUE clause
2) using sample([%]) function

The first way has advantage in 'CORRECTNESS' which means you will never fail get result if it actually exists, while in the second way you may get no result even though it has cases satisfying the query condition since information is reduced during sampling.

The second way has advantage in 'EFFICIENT' which mean you will get result faster and give light load to your database. I was given an warning from DBA that my query using the first way gives loads to the database

You can choose one of two ways according to your interest!

Rails >= 3.2 (including Rails 4+ and 5+):

class Countries < ActiveRecord::Base
  self.table_name = "cc"
end

Rails <= 3.1:

class Countries < ActiveRecord::Base
  self.set_table_name "cc"
  ...
end

You need to use the change directory command 'cd' to change directory

cd C:\Users\MyName\Desktop

you can use cd \d to change the drive as well.

link for additional resources http://ss64.com/nt/cd.html

 dmidecode  | grep -i cpu | grep Version

gives me

Version: Intel(R) Xeon(R) CPU E5-2667 v4 @ 3.20GHz

Version: Intel(R) Xeon(R) CPU E5-2667 v4 @ 3.20GHz

Which is correct socket count - looking up the E5-2667 tells me each socket has 8 cores, so multiply and end up with 16 cores across 2 sockets.

Where lscpu give me 20 CPUs - which is totally incorrect - not sure why. (same goes for cat /proc/cpu - ends up with 20.

Another option to tag a Subversion repository is to add the tag to the svn:log property like this:

   echo "TAG: your_tag_text" > newlog
   svn propget $REPO --revprop -r $tagged_revision >> newlog
   svn propset $REPO --revprop -r $tagged_revision -F newlog
   rm newlog

I recently started thinking that this is the most "right" way to tag. This way you don't create extra revisions (as you do with "svn cp") and still can easily extract all tags by using grep on "svn log" output:

   svn log | awk '/----/ {
                      expect_rev=1;
                      expect_tag=0;
                  }
                  /^r[[:digit:]]+/ {
                      if(expect_rev) {
                          rev=$1;
                          expect_tag=1;
                          expect_rev=0;
                      }
                  }
                  /^TAG:/ {
                      if(expect_tag) {
                          print "Revision "rev", Tag: "$2;
                      }
                      expect_tag=0;
                  }'

Also, this way you may seamlessly delete tags if you need to. So the tags become a complete meta-information, and I like it.

The non-greedy regex modifiers are like their greedy counter-parts but with a ? immediately following them:

*  - zero or more
*? - zero or more (non-greedy)
+  - one or more
+? - one or more (non-greedy)
?  - zero or one
?? - zero or one (non-greedy)

This one works for me:

grep <stuff> -R --exclude-dir=<your_dir>

I have this alias in my .profile that I use quite often:

$ alias | grep xlogs
xlogs='sudo find . \( -name "*.log" -o -name "*.trc" \) -mtime -1 | sudo xargs ls -ltr --color | less -R'

So it does what you are looking for (with exception it doesn't traverse change date/time multiple levels) - looks for latest files (*.log and *.trc files in this case); also it only finds files modified in the last day, and then sorts by time and pipes the output through less:

sudo find . \( -name "*.log" -o -name "*.trc" \) -mtime -1 | sudo xargs ls -ltr --color | less -R

PS.: Notice I don't have root on some of the servers, but always have sudo, so you may not need that part.

If you want the complete URL e.g. website.com/workingdirectory/ use: window.location.hostname+window.location.pathname.replace(/[^\\\/]*$/, '');

You can change your secret special value to 0, and exploit C's default structure-member semantics

struct foo bar = { .id = 42, .current_route = new_route };
update(&bar);

will then pass 0 as members of bar unspecified in the initializer.

Or you can create a macro that will do the default initialization for you:

#define FOO_INIT(...) { .id = -1, .current_route = -1, .quux = -1, ## __VA_ARGS__ }

struct foo bar = FOO_INIT( .id = 42, .current_route = new_route );
update(&bar);

Try the specific_install gem it allows you you to install a gem from its github repository (like 'edge'), or from an arbitrary URL. Very usefull for forking gems and hacking on them on multiple machines and such.

gem install specific_install
gem specific_install -l <url to a github gem>

e.g.

gem specific_install https://github.com/githubsvnclone/rdoc.git 

Call parent.remove(panel), where parent is the container that you want the frame in and panel is the panel you want to add.

target="_parent" worked great for me. easy and hassle free!