Programs & Examples On #Dictionary

I'd like to share my own work that is faster than Manager's dict and is simpler and more stable than pyshmht library that uses tons of memory and doesn't work for Mac OS. Though my dict only works for plain strings and is immutable currently. I use linear probing implementation and store keys and values pairs in a separate memory block after the table.

from mmap import mmap
import struct
from timeit import default_timer
from multiprocessing import Manager
from pyshmht import HashTable


class shared_immutable_dict:
    def __init__(self, a):
        self.hs = 1 << (len(a) * 3).bit_length()
        kvp = self.hs * 4
        ht = [0xffffffff] * self.hs
        kvl = []
        for k, v in a.iteritems():
            h = self.hash(k)
            while ht[h] != 0xffffffff:
                h = (h + 1) & (self.hs - 1)
            ht[h] = kvp
            kvp += self.kvlen(k) + self.kvlen(v)
            kvl.append(k)
            kvl.append(v)

        self.m = mmap(-1, kvp)
        for p in ht:
            self.m.write(uint_format.pack(p))
        for x in kvl:
            if len(x) <= 0x7f:
                self.m.write_byte(chr(len(x)))
            else:
                self.m.write(uint_format.pack(0x80000000 + len(x)))
            self.m.write(x)

    def hash(self, k):
        h = hash(k)
        h = (h + (h >> 3) + (h >> 13) + (h >> 23)) * 1749375391 & (self.hs - 1)
        return h

    def get(self, k, d=None):
        h = self.hash(k)
        while True:
            x = uint_format.unpack(self.m[h * 4:h * 4 + 4])[0]
            if x == 0xffffffff:
                return d
            self.m.seek(x)
            if k == self.read_kv():
                return self.read_kv()
            h = (h + 1) & (self.hs - 1)

    def read_kv(self):
        sz = ord(self.m.read_byte())
        if sz & 0x80:
            sz = uint_format.unpack(chr(sz) + self.m.read(3))[0] - 0x80000000
        return self.m.read(sz)

    def kvlen(self, k):
        return len(k) + (1 if len(k) <= 0x7f else 4)

    def __contains__(self, k):
        return self.get(k, None) is not None

    def close(self):
        self.m.close()

uint_format = struct.Struct('>I')


def uget(a, k, d=None):
    return to_unicode(a.get(to_str(k), d))


def uin(a, k):
    return to_str(k) in a


def to_unicode(s):
    return s.decode('utf-8') if isinstance(s, str) else s


def to_str(s):
    return s.encode('utf-8') if isinstance(s, unicode) else s


def mmap_test():
    n = 1000000
    d = shared_immutable_dict({str(i * 2): '1' for i in xrange(n)})
    start_time = default_timer()
    for i in xrange(n):
        if bool(d.get(str(i))) != (i % 2 == 0):
            raise Exception(i)
    print 'mmap speed: %d gets per sec' % (n / (default_timer() - start_time))


def manager_test():
    n = 100000
    d = Manager().dict({str(i * 2): '1' for i in xrange(n)})
    start_time = default_timer()
    for i in xrange(n):
        if bool(d.get(str(i))) != (i % 2 == 0):
            raise Exception(i)
    print 'manager speed: %d gets per sec' % (n / (default_timer() - start_time))


def shm_test():
    n = 1000000
    d = HashTable('tmp', n)
    d.update({str(i * 2): '1' for i in xrange(n)})
    start_time = default_timer()
    for i in xrange(n):
        if bool(d.get(str(i))) != (i % 2 == 0):
            raise Exception(i)
    print 'shm speed: %d gets per sec' % (n / (default_timer() - start_time))


if __name__ == '__main__':
    mmap_test()
    manager_test()
    shm_test()

On my laptop performance results are:

mmap speed: 247288 gets per sec
manager speed: 33792 gets per sec
shm speed: 691332 gets per sec

simple usage example:

ht = shared_immutable_dict({'a': '1', 'b': '2'})
print ht.get('a')

Python dicts are not sorted, by definition. You cannot sort one, nor control the order of its elements by how you insert them. You might want to look at collections.OrderDict, which even comes with a little tutorial for almost exactly what you're trying to do: http://docs.python.org/2/library/collections.html#ordereddict-examples-and-recipes

Here is what I have been using:

public static HashMap<String, Object> parse(String json) {
    JsonObject object = (JsonObject) parser.parse(json);
    Set<Map.Entry<String, JsonElement>> set = object.entrySet();
    Iterator<Map.Entry<String, JsonElement>> iterator = set.iterator();
    HashMap<String, Object> map = new HashMap<String, Object>();
    while (iterator.hasNext()) {
        Map.Entry<String, JsonElement> entry = iterator.next();
        String key = entry.getKey();
        JsonElement value = entry.getValue();
        if (!value.isJsonPrimitive()) {
            map.put(key, parse(value.toString()));
        } else {
            map.put(key, value.getAsString());
        }
    }
    return map;
}

Instead of taking a performance hit each time you want to look up a value, how about you flatten the dictionary once then simply look up the key like b:v:y

def flatten(mydict):
  new_dict = {}
  for key,value in mydict.items():
    if type(value) == dict:
      _dict = {':'.join([key, _key]):_value for _key, _value in flatten(value).items()}
      new_dict.update(_dict)
    else:
      new_dict[key]=value
  return new_dict

dataDict = {
"a":{
    "r": 1,
    "s": 2,
    "t": 3
    },
"b":{
    "u": 1,
    "v": {
        "x": 1,
        "y": 2,
        "z": 3
    },
    "w": 3
    }
}    

flat_dict = flatten(dataDict)
print flat_dict
{'b:w': 3, 'b:u': 1, 'b:v:y': 2, 'b:v:x': 1, 'b:v:z': 3, 'a:r': 1, 'a:s': 2, 'a:t': 3}

This way you can simply look up items using flat_dict['b:v:y'] which will give you 1.

And instead of traversing the dictionary on each lookup, you may be able to speed this up by flattening the dictionary and saving the output so that a lookup from cold start would mean loading up the flattened dictionary and simply performing a key/value lookup with no traversal.

To remove specific key and element from hashmap use

hashmap.remove(key)

full source code is like

import java.util.HashMap;
public class RemoveMapping {
     public static void main(String a[]){
        HashMap hashMap = new HashMap();
        hashMap.put(1, "One");
        hashMap.put(2, "Two");
        hashMap.put(3, "Three");
        System.out.println("Original HashMap : "+hashMap);
        hashMap.remove(3);   
        System.out.println("Changed HashMap : "+hashMap);        
    }
}

Source : http://www.tutorialdata.com/examples/java/collection-framework/hashmap/remove-mapping-of-specified--key-from-hashmap

I use this helper:

public static class ObjectToDictionaryHelper
{
    public static IDictionary<string, object> ToDictionary(this object source)
    {
        return source.ToDictionary<object>();
    }

    public static IDictionary<string, T> ToDictionary<T>(this object source)
    {
        if (source == null)
            ThrowExceptionWhenSourceArgumentIsNull();

        var dictionary = new Dictionary<string, T>();
        foreach (PropertyDescriptor property in TypeDescriptor.GetProperties(source))
            AddPropertyToDictionary<T>(property, source, dictionary);
        return dictionary;
    }

    private static void AddPropertyToDictionary<T>(PropertyDescriptor property, object source, Dictionary<string, T> dictionary)
    {
        object value = property.GetValue(source);
        if (IsOfType<T>(value))
            dictionary.Add(property.Name, (T)value);
    }

    private static bool IsOfType<T>(object value)
    {
        return value is T;
    }

    private static void ThrowExceptionWhenSourceArgumentIsNull()
    {
        throw new ArgumentNullException("source", "Unable to convert object to a dictionary. The source object is null.");
    }
}

the usage is just to call .ToDictionary() on an object

Hope it helps.

Since a dict is iterable, you can apply the classic nested container iterable formula to this problem with only a couple of minor changes. Here's a Python 2 version (see below for 3):

import collections
def nested_dict_iter(nested):
    for key, value in nested.iteritems():
        if isinstance(value, collections.Mapping):
            for inner_key, inner_value in nested_dict_iter(value):
                yield inner_key, inner_value
        else:
            yield key, value

Test:

list(nested_dict_iter({'a':{'b':{'c':1, 'd':2}, 
                            'e':{'f':3, 'g':4}}, 
                       'h':{'i':5, 'j':6}}))
# output: [('g', 4), ('f', 3), ('c', 1), ('d', 2), ('i', 5), ('j', 6)]

In Python 2, It might be possible to create a custom Mapping that qualifies as a Mapping but doesn't contain iteritems, in which case this will fail. The docs don't indicate that iteritems is required for a Mapping; on the other hand, the source gives Mapping types an iteritems method. So for custom Mappings, inherit from collections.Mapping explicitly just in case.

In Python 3, there are a number of improvements to be made. As of Python 3.3, abstract base classes live in collections.abc. They remain in collections too for backwards compatibility, but it's nicer having our abstract base classes together in one namespace. So this imports abc from collections. Python 3.3 also adds yield from, which is designed for just these sorts of situations. This is not empty syntactic sugar; it may lead to faster code and more sensible interactions with coroutines.

from collections import abc
def nested_dict_iter(nested):
    for key, value in nested.items():
        if isinstance(value, abc.Mapping):
            yield from nested_dict_iter(value)
        else:
            yield key, value

Solution is:

DICT_RESERVED_KEYS = vars(dict).keys()


class SmartDict(dict):
    """
    A Dict which is accessible via attribute dot notation
    """
    def __init__(self, *args, **kwargs):
        """
        :param args: multiple dicts ({}, {}, ..)
        :param kwargs: arbitrary keys='value'

        If ``keyerror=False`` is passed then not found attributes will
        always return None.
        """
        super(SmartDict, self).__init__()
        self['__keyerror'] = kwargs.pop('keyerror', True)
        [self.update(arg) for arg in args if isinstance(arg, dict)]
        self.update(kwargs)

    def __getattr__(self, attr):
        if attr not in DICT_RESERVED_KEYS:
            if self['__keyerror']:
                return self[attr]
            else:
                return self.get(attr)
        return getattr(self, attr)

    def __setattr__(self, key, value):
        if key in DICT_RESERVED_KEYS:
            raise AttributeError("You cannot set a reserved name as attribute")
        self.__setitem__(key, value)

    def __copy__(self):
        return self.__class__(self)

    def copy(self):
        return self.__copy__()

When you write

map[key] = value;

there's no way to tell if you replaced the value for key, or if you created a new key with value.

map::insert() will only create:

using std::cout; using std::endl;
typedef std::map<int, std::string> MyMap;
MyMap map;
// ...
std::pair<MyMap::iterator, bool> res = map.insert(MyMap::value_type(key,value));
if ( ! res.second ) {
    cout << "key " <<  key << " already exists "
         << " with value " << (res.first)->second << endl;
} else {
    cout << "created key " << key << " with value " << value << endl;
}

For most of my apps, I usually don't care if I'm creating or replacing, so I use the easier to read map[key] = value.

time1 is the key of the most outer dictionary, eg, feb2012. So then you're trying to index the string, but you can only do this with integers. I think what you wanted was:

for info in courses[time1][course]:

As you're going through each dictionary, you must add another nest.

Any collection that you iterate over with foreach may not be modified during iteration.

So while you're running a foreach over rankings, you cannot modify its elements, add new ones or delete any.

You could use a custom comparison function, or you could pass in a function that calculates a custom sort key. That's usually more efficient as the key is only calculated once per item, while the comparison function would be called many more times.

You could do it this way:

def mykey(adict): return adict['name']
x = [{'name': 'Homer', 'age': 39}, {'name': 'Bart', 'age':10}]
sorted(x, key=mykey)

But the standard library contains a generic routine for getting items of arbitrary objects: itemgetter. So try this instead:

from operator import itemgetter
x = [{'name': 'Homer', 'age': 39}, {'name': 'Bart', 'age':10}]
sorted(x, key=itemgetter('name'))

To OP's example:

s = "{'muffin' : 'lolz', 'foo' : 'kitty'}"

We can use Yaml to deal with this kind of non-standard json in string:

>>> import yaml
>>> s = "{'muffin' : 'lolz', 'foo' : 'kitty'}"
>>> s
"{'muffin' : 'lolz', 'foo' : 'kitty'}"
>>> yaml.load(s)
{'muffin': 'lolz', 'foo': 'kitty'}

If in Chinses

import codecs
fout = codecs.open("xxx.json", "w", "utf-8")
dict_to_json = json.dumps({'text':"??"},ensure_ascii=False,indent=2)
fout.write(dict_to_json + '\n')

n = eval(input('Num books: '))
books = {}
for i in range(n):
    titlez = input("Enter Title: ")
    copy = eval(input("Num of copies: "))
    books[titlez] = copy

prob = input('Sell a book; enter YES or NO: ')
if prob == 'YES' or 'yes':
    choice = input('Enter book title: ')
    if choice in books:
        init_num = books[choice]
        init_num -= 1
        books[choice] = init_num
        print(books)

This confused me too, initially, because I was coming from a C background.

In C, a variable is a location in memory with a defined type. Assigning to a variable copies the data into the variable's memory location.

But in Python, variables act more like pointers to objects. So assigning one variable to another doesn't make a copy, it just makes that variable name point to the same object.

When I printed response.read() I noticed that b was preprended to the string (e.g. b'{"a":1,..). The "b" stands for bytes and serves as a declaration for the type of the object you're handling. Since, I knew that a string could be converted to a dict by using json.loads('string'), I just had to convert the byte type to a string type. I did this by decoding the response to utf-8 decode('utf-8'). Once it was in a string type my problem was solved and I was easily able to iterate over the dict.

I don't know if this is the fastest or most 'pythonic' way of writing this but it works and theres always time later of optimization and improvement! Full code for my solution:

from urllib.request import urlopen
import json

# Get the dataset
url = 'http://www.quandl.com/api/v1/datasets/FRED/GDP.json'
response = urlopen(url)

# Convert bytes to string type and string type to dict
string = response.read().decode('utf-8')
json_obj = json.loads(string)

print(json_obj['source_name']) # prints the string with 'source_name' key

What about using EAFP (easier to ask forgiveness than permission):

try:
   blah = dict["mykey"]
   # key exists in dict
except KeyError:
   # key doesn't exist in dict

See other SO posts:

Using try vs if in python or

Checking for member existence in Python

This worked for me:

dict = {1: 'a', 2: '', 3: 'b', 4: '', 5: '', 6: 'c'}
for key, value in list(dict.items()):
    if (value == ''):
        del dict[key]
print(dict)
# dict = {1: 'a', 3: 'b', 6: 'c'}  

Casting the dictionary items to list creates a list of its items, so you can iterate over it and avoid the RuntimeError.

import json 'mtach' in json.dumps(myDict) is true if found

Using collections.defaultdict is a big time-saver when you're building dicts and don't know beforehand which keys you're going to have.

Here it's used twice: for the resulting dict, and for each of the values in the dict.

import collections

def aggregate_names(errors):
    result = collections.defaultdict(lambda: collections.defaultdict(list))
    for real_name, false_name, location in errors:
        result[real_name][false_name].append(location)
    return result

Combining this with your code:

dictionary = aggregate_names(previousFunction(string))

Or to test:

EXAMPLES = [
    ('Fred', 'Frad', 123),
    ('Jim', 'Jam', 100),
    ('Fred', 'Frod', 200),
    ('Fred', 'Frad', 300)]
print aggregate_names(EXAMPLES)

If your dictionaries are deeply nested and if they contain different types of collections, you could convert them to json string and compare.

import json
match = (json.dumps(dict1) == json.dumps(dict2))

caveat- this solution may not work if your dictionaries have binary strings in the values as this is not json serializable

Use df.to_dict('records') -- gives the output without having to transpose externally.

In [2]: df.to_dict('records')
Out[2]:
[{'customer': 1L, 'item1': 'apple', 'item2': 'milk', 'item3': 'tomato'},
 {'customer': 2L, 'item1': 'water', 'item2': 'orange', 'item3': 'potato'},
 {'customer': 3L, 'item1': 'juice', 'item2': 'mango', 'item3': 'chips'}]

Or like this:

List< KeyValuePair< string, int > > theList =
    new List< KeyValuePair< string,int > >(this.yourDictionary);

for ( int i = 0; i < theList.Count; i++)
{ 
  // the key
  Console.WriteLine(theList[i].Key);
}

TryGetValue will already assign the default value for the type to the dictionary, so you can just use:

dictionary.TryGetValue(key, out value);

and just ignore the return value. However, that really will just return default(TValue), not some custom default value (nor, more usefully, the result of executing a delegate). There's nothing more powerful built into the framework. I would suggest two extension methods:

public static TValue GetValueOrDefault<TKey, TValue>
    (this IDictionary<TKey, TValue> dictionary, 
     TKey key,
     TValue defaultValue)
{
    TValue value;
    return dictionary.TryGetValue(key, out value) ? value : defaultValue;
}

public static TValue GetValueOrDefault<TKey, TValue>
    (this IDictionary<TKey, TValue> dictionary,
     TKey key,
     Func<TValue> defaultValueProvider)
{
    TValue value;
    return dictionary.TryGetValue(key, out value) ? value
         : defaultValueProvider();
}

(You may want to put argument checking in, of course :)

As Python 3.0 and 3.1 are EOL'ed and no one uses them, you can and should use str.format_map(mapping) (Python 3.2+):

Similar to str.format(**mapping), except that mapping is used directly and not copied to a dict. This is useful if for example mapping is a dict subclass.

What this means is that you can use for example a defaultdict that would set (and return) a default value for keys that are missing:

>>> from collections import defaultdict
>>> vals = defaultdict(lambda: '<unset>', {'bar': 'baz'})
>>> 'foo is {foo} and bar is {bar}'.format_map(vals)
'foo is <unset> and bar is baz'

Even if the mapping provided is a dict, not a subclass, this would probably still be slightly faster.

The difference is not big though, given

>>> d = dict(foo='x', bar='y', baz='z')

then

>>> 'foo is {foo}, bar is {bar} and baz is {baz}'.format_map(d)

is about 10 ns (2 %) faster than

>>> 'foo is {foo}, bar is {bar} and baz is {baz}'.format(**d)

on my Python 3.4.3. The difference would probably be larger as more keys are in the dictionary, and

Note that the format language is much more flexible than that though; they can contain indexed expressions, attribute accesses and so on, so you can format a whole object, or 2 of them:

>>> p1 = {'latitude':41.123,'longitude':71.091}
>>> p2 = {'latitude':56.456,'longitude':23.456}
>>> '{0[latitude]} {0[longitude]} - {1[latitude]} {1[longitude]}'.format(p1, p2)
'41.123 71.091 - 56.456 23.456'

Starting from 3.6 you can use the interpolated strings too:

>>> f'lat:{p1["latitude"]} lng:{p1["longitude"]}'
'lat:41.123 lng:71.091'

You just need to remember to use the other quote characters within the nested quotes. Another upside of this approach is that it is much faster than calling a formatting method.

I used to use this function. its safe, quick, easily maintainable.

def deep_get(dictionary, keys, default=None):
    return reduce(lambda d, key: d.get(key, default) if isinstance(d, dict) else default, keys.split("."), dictionary)

Example :

>>> from functools import reduce
>>> def deep_get(dictionary, keys, default=None):
...     return reduce(lambda d, key: d.get(key, default) if isinstance(d, dict) else default, keys.split("."), dictionary)
...
>>> person = {'person':{'name':{'first':'John'}}}
>>> print (deep_get(person, "person.name.first"))
John
>>> print (deep_get(person, "person.name.lastname"))
None
>>> print (deep_get(person, "person.name.lastname", default="No lastname"))
No lastname
>>>

Although the order does not matter as the dictionary is hashmap. It depends on the order how it is pushed in:

s = 'abbc'
a = 'cbab'

def load_dict(s):
    dict_tmp = {}
    for ch in s:
        if ch in dict_tmp.keys():
            dict_tmp[ch]+=1
        else:
            dict_tmp[ch] = 1
    return dict_tmp

dict_a = load_dict(a)
dict_s = load_dict(s)
print('for string %s, the keys are %s'%(s, dict_s.keys()))
print('for string %s, the keys are %s'%(a, dict_a.keys()))

output:
for string abbc, the keys are dict_keys(['a', 'b', 'c'])
for string cbab, the keys are dict_keys(['c', 'b', 'a'])

With the structured binding (“destructuring”) declaration syntax of C++17,

you can do this, which is easier to understand.

// To get the keys
std::map<int, double> map;
std::vector<int> keys;
keys.reserve(map.size());
for(const auto& [key, value] : map) {
    keys.push_back(key);
}

// To get the values
std::map<int, double> map;
std::vector<double> values;
values.reserve(map.size());
for(const auto& [key, value] : map) {
    values.push_back(value);
}

If you are not sure that you have not multiple minimum values, I would suggest:

d = {320:1, 321:0, 322:3, 323:0}
print ', '.join(str(key) for min_value in (min(d.values()),) for key in d if d[key]==min_value)

"""Output:
321, 323
"""

http://www.math.sjsu.edu/~foster/dictionary.txt

350,000 words

Very late, but might be useful for others.

I am also very much interested to have a one-liner for this conversion, as far such a list is the default initializer for hashed in Perl.

Exceptionally comprehensive answer is given in this thread -

• python convert list to dictionary

Mine one I am newbie in Python), using Python 2.7 Generator Expressions, would be:

dict((a[i], a[i + 1]) for i in range(0, len(a) - 1, 2))

You can also use numpy for this.

from numpy import loadtxt
key_value = loadtxt("filename.csv", delimiter=",")
mydict = { k:v for k,v in key_value }

With C++17 (or later), you can use the "structured bindings" feature, which lets you define multiple variables, with different names, using a single tuple/pair. Example:

for (const auto& [name, description] : planet_descriptions) {
    std::cout << "Planet " << name << ":\n" << description << "\n\n";
}

The original proposal (by luminaries Bjarne Stroustrup, Herb Sutter and Gabriel Dos Reis) is fun to read (and the suggested syntax is more intuitive IMHO); there's also the proposed wording for the standard which is boring to read but is closer to what will actually go in.

Dictionaries are specifically designed to do super fast key lookups. They are implemented as hashtables and the more entries the faster they are relative to other methods. Using the exception engine is only supposed to be done when your method has failed to do what you designed it to do because it is a large set of object that give you a lot of functionality for handling errors. I built an entire library class once with everything surrounded by try catch blocks once and was appalled to see the debug output which contained a seperate line for every single one of over 600 exceptions!

has_key is a dictionary method, but in will work on any collection, and even when __contains__ is missing, in will use any other method to iterate the collection to find out.

WELCOME TO 2020 *Drools in ES6*

Theres some pretty old answers in here - take advantage of destructuring. In my opinion this is without a doubt the nicest (very readable) way to iterate an object.

const myObject = {
    nick: 'cage',
    phil: 'murray',
};

Object.entries(myObject).forEach(([k,v]) => {
    console.log("The key: ",k)
    console.log("The value: ",v)
})

Edit:

As mentioned by Lazerbeak, map allows you to cycle an object and use the key and value to make an array.

const myObject = {
    nick: 'cage',
    phil: 'murray',
};

const myArray = Object.entries(myObject).map(([k, v]) => {
    return `The key '${k}' has a value of '${v}'`;
});

console.log(myArray);

You probably want to flatten all of the lists in Values into a single list:

List<MyType> allItems = myDico.Values.SelectMany(c => c).ToList();

I guess you mean this:

class Value:
    def __init__(self, v=None):
        self.v = v

v1 = Value(1)
v2 = Value(2)

d = {'a': v1, 'b': v1, 'c': v2, 'd': v2}
d['a'].v += 1

d['b'].v == 2 # True

• Python's strings and numbers are immutable objects,
• So, if you want d['a'] and d['b'] to point to the same value that "updates" as it changes, make the value refer to a mutable object (user-defined class like above, or a dict, list, set).
• Then, when you modify the object at d['a'], d['b'] changes at same time because they both point to same object.

Serializing data structures containing only numeric or boolean values is fairly straightforward. If you don't have much to serialize, you can write a method for your specific type.

For a Dictionary<int, List<int>> as you have specified, you can use Linq:

string MyDictionaryToJson(Dictionary<int, List<int>> dict)
{
    var entries = dict.Select(d =>
        string.Format("\"{0}\": [{1}]", d.Key, string.Join(",", d.Value)));
    return "{" + string.Join(",", entries) + "}";
}

But, if you are serializing several different classes, or more complex data structures, or especially if your data contains string values, you would be better off using a reputable JSON library that already knows how to handle things like escape characters and line breaks. Json.NET is a popular option.

EDIT

another way to deal with duplicate is you can do like this

var dic = slist.Select((element, index)=> new{element,index} )
            .ToDictionary(ele=>ele.index.ToString(), ele=>ele.element);

or

easy way to do is

var res = list.ToDictionary(str => str, str=> str); 

but make sure that there is no string is repeating...again otherewise above code will not work for you

if there is string is repeating than its better to do like this

Dictionary<string,string> dic= new Dictionary<string,string> ();

    foreach(string s in Stringlist)
    {
       if(!dic.ContainsKey(s))
       {
        //  dic.Add( value to dictionary
      }
    }

Inside of your loop, you have the key, which you can use to retrieve the value from the Map:

for (String key: mss1.keySet()) {
    System.out.println(key + ": " + mss1.get(key));
}

for(map<string, pair<string,string> >::const_iterator it = myMap.begin();
    it != myMap.end(); ++it)
{
    std::cout << it->first << " " << it->second.first << " " << it->second.second << "\n";
}

In C++11, you don't need to spell out map<string, pair<string,string> >::const_iterator. You can use auto

for(auto it = myMap.cbegin(); it != myMap.cend(); ++it)
{
    std::cout << it->first << " " << it->second.first << " " << it->second.second << "\n";
}

Note the use of cbegin() and cend() functions.

Easier still, you can use the range-based for loop:

for(auto elem : myMap)
{
   std::cout << elem.first << " " << elem.second.first << " " << elem.second.second << "\n";
}

dict.iteritems is gone in Python3.x So use iter(dict.items()) to get the same output and memory alocation

This answer didn't work for me, but I found the answer myself. No one, however, has posted my question. I'm too lazy to ask it and then answer it, so will just put it here.

This is for the following query:

data = Leaderboard.objects.filter(id=custom_user.id).values(
    'value1',
    'value2',
    'value3')

In template:

{% for dictionary in data %}
  {% for key, value in dictionary.items %}
    <p>{{ key }} : {{ value }}</p>
  {% endfor %}
{% endfor %}

multi-map

This is really helpful if you want to create a multimap without resorting to the Google Guava library for its implementation of MultiMap.

For example, suppose you want to store a list of students who enrolled for a particular subject.

The normal solution for this using JDK library is:

Map<String,List<String>> studentListSubjectWise = new TreeMap<>();
List<String>lis = studentListSubjectWise.get("a");
if(lis == null) {
    lis = new ArrayList<>();
}
lis.add("John");

//continue....

Since it have some boilerplate code, people tend to use Guava Mutltimap.

Using Map.computeIfAbsent, we can write in a single line without guava Multimap as follows.

studentListSubjectWise.computeIfAbsent("a", (x -> new ArrayList<>())).add("John");

Stuart Marks & Brian Goetz did a good talk about this https://www.youtube.com/watch?v=9uTVXxJjuco

If you want "insert or replace" semantics, use this syntax:

A[key] = value;     // <-- insert or replace semantics

It's more efficient and readable than calls involving "ContainsKey()" or "Remove()" prior to "Add()".

So in your case:

rct3Features[items[0]] = items[1];

def doAppend( size=10000 ):
    result = []
    for i in range(size):
        message= "some unique object %d" % ( i, )
        result.append(message)
    return result

def doAllocate( size=10000 ):
    result=size*[None]
    for i in range(size):
        message= "some unique object %d" % ( i, )
        result[i]= message
    return result

Results. (evaluate each function 144 times and average the duration)

simple append 0.0102
pre-allocate  0.0098

Conclusion. It barely matters.

Premature optimization is the root of all evil.

From: http://www.cplusplus.com/reference/map/map/

"Internally, the elements in a map are always sorted by its key following a specific strict weak ordering criterion indicated by its internal comparison object (of type Compare).

map containers are generally slower than unordered_map containers to access individual elements by their key, but they allow the direct iteration on subsets based on their order."

I suggest a LinkedHashMap or a TreeMap. A LinkedHashMap keeps the keys in the order they were inserted, while a TreeMap is kept sorted via a Comparator or the natural Comparable ordering of the elements.

Since it doesn't have to keep the elements sorted, LinkedHashMap should be faster for most cases; TreeMap has O(log n) performance for containsKey, get, put, and remove, according to the Javadocs, while LinkedHashMap is O(1) for each.

If your API that only expects a predictable sort order, as opposed to a specific sort order, consider using the interfaces these two classes implement, NavigableMap or SortedMap. This will allow you not to leak specific implementations into your API and switch to either of those specific classes or a completely different implementation at will afterwards.

JavaScript developers tend to refer to the above data-structure as either an object or hash instead of a Dictionary.

Your syntax above is wrong as you are initializing the users object as null. I presume this is a typo, as the code should read:

// Initialize users as a new hash.
var users = {};
users["182982"] = "...";

To retrieve all the values from a hash, you need to iterate over it using a for loop:

function getValues (hash) {
    var values = [];
    for (var key in hash) {

        // Ensure that the `key` is actually a member of the hash and not
        // a member of the `prototype`.
        // see: http://javascript.crockford.com/code.html#for%20statement
        if (hash.hasOwnProperty(key)) {
            values.push(key);
        }
    }
    return values;
};

If you plan on doing a lot of work with data-structures in JavaScript then the underscore.js library is definitely worth a look. Underscore comes with a values method which will perform the above task for you:

var values = _.values(users);

I don't use Angular myself, but I'm pretty sure there will be a convenience method build in for iterating over a hash's values (ah, there we go, Artem Andreev provides the answer above :))

As others have said above, you can use get().

But to check for a key, you can also do:

d = {}
if 'keyname' in d:

    # d['keyname'] exists
    pass

else:

    # d['keyname'] does not exist
    pass

By default, the classes in the csv module use Windows-style line terminators (\r\n) rather than Unix-style (\n). Could this be what’s causing the apparent double line breaks?

If so, you can override it in the DictWriter constructor:

output = csv.DictWriter(open('file3.csv','w'), delimiter=',', lineterminator='\n', fieldnames=headers)

+-----------------------------------------------------------------------------+
¦   Property    ¦     HashMap       ¦    Hashtable      ¦  ConcurrentHashMap  ¦
¦---------------+-------------------+-----------------------------------------¦ 
¦      Null     ¦     allowed       ¦              not allowed                ¦
¦  values/keys  ¦                   ¦                                         ¦
¦---------------+-------------------+-----------------------------------------¦
¦ Thread-safety ¦                   ¦                                         ¦
¦   features    ¦       no          ¦                  yes                    ¦
¦---------------+-------------------+-----------------------------------------¦
¦     Lock      ¦       not         ¦ locks the whole   ¦ locks the portion   ¦        
¦  mechanism    ¦    applicable     ¦       map         ¦                     ¦ 
¦---------------+---------------------------------------+---------------------¦
¦   Iterator    ¦               fail-fast               ¦ weakly consistent   ¦ 
+-----------------------------------------------------------------------------+

Regarding locking mechanism: Hashtable locks the object, while ConcurrentHashMap locks only the bucket.

As an illustration for the things already mentioned before:

>>> a = {1:2}
>>> id(a)
3073677212L
>>> a.clear()
>>> id(a)
3073677212L
>>> a = {}
>>> id(a)
3073675716L

This answer will be for swift dictionary w/ String keys. Like this one below.

let dict: [String: Int] = ["hey": 1, "yo": 2, "sup": 3, "hello": 4, "whassup": 5]

Here's the extension I'll use.

extension Dictionary {
  func allKeys() -> [String] {
    guard self.keys.first is String else {
      debugPrint("This function will not return other hashable types. (Only strings)")
      return []
    }
    return self.flatMap { (anEntry) -> String? in
                          guard let temp = anEntry.key as? String else { return nil }
                          return temp }
  }
}

And I'll get all the keys later using this.

let componentsArray = dict.allKeys()

map.at("key") throws exception if missing key

If k does not match the key of any element in the container, the function throws an out_of_range exception.

http://www.cplusplus.com/reference/map/map/at/

If the dictionary contains one pair like this:

d = {'age':24}

then you can get as

field, value = d.items()[0]

For Python 3.5, do this:

key = list(d.keys())[0]

DSM's and Tadeck's answers answer your question directly.

In my scripts I often use the convenient dict.pop() to deal with optional, and additional arguments. Here's an example of a simple print() wrapper:

def my_print(*args, **kwargs):
    prefix = kwargs.pop('prefix', '')
    print(prefix, *args, **kwargs)

Then:

>>> my_print('eggs')
 eggs
>>> my_print('eggs', prefix='spam')
spam eggs

As you can see, if prefix is not contained in kwargs, then the default '' (empty string) is being stored in the local prefix variable. If it is given, then its value is being used.

This is generally a compact and readable recipe for writing wrappers for any kind of function: Always just pass-through arguments you don't understand, and don't even know if they exist. If you always pass through *args and **kwargs you make your code slower, and requires a bit more typing, but if interfaces of the called function (in this case print) changes, you don't need to change your code. This approach reduces development time while supporting all interface changes.

If you want to use Linq then you can use the following snippet:

var listNumber = dicNumber.Keys.ToList();

import Foundation

let x = ["a":1]
let y = ["b":2]

let out = NSMutableDictionary(dictionary: x)
out.addEntriesFromDictionary(y)

The result is an NSMutableDictionary not a Swift typed dictionary, but the syntax to use it is the same (out["a"] == 1 in this case) so you'd only have a problem if you're using third-party code which expects a Swift dictionary, or really need the type checking.

The short answer here is that you actually do have to loop. Even if you're not entering it explicitly, that's what the method you're calling (addEntriesFromDictionary: here) will do. I'd suggest if you're a bit unclear on why that would be the case you should consider how you would merge the leaf nodes of two B-trees.

If you really actually need a Swift native dictionary type in return, I'd suggest:

let x = ["a":1]
let y = ["b":2]

var out = x
for (k, v) in y {
    out[k] = v
}

The downside of this approach is that the dictionary index - however it's done - may be rebuilt several times in the loop, so in practice this is about 10x slower than the NSMutableDictionary approach.

Yes, its definitely possible to avoid the intermediate conversion to JSON. Using a deep-copy tool like Dozer you can convert the map directly to a POJO. Here is a simplistic example:

Example POJO:

public class MyPojo implements Serializable {
    private static final long serialVersionUID = 1L;

    private String id;
    private String name;
    private Integer age;
    private Double savings;

    public MyPojo() {
        super();
    }

    // Getters/setters

    @Override
    public String toString() {
        return String.format(
                "MyPojo[id = %s, name = %s, age = %s, savings = %s]", getId(),
                getName(), getAge(), getSavings());
    }
}

Sample conversion code:

public class CopyTest {
    @Test
    public void testCopyMapToPOJO() throws Exception {
        final Map<String, String> map = new HashMap<String, String>(4);
        map.put("id", "5");
        map.put("name", "Bob");
        map.put("age", "23");
        map.put("savings", "2500.39");
        map.put("extra", "foo");

        final DozerBeanMapper mapper = new DozerBeanMapper();
        final MyPojo pojo = mapper.map(map, MyPojo.class);
        System.out.println(pojo);
    }
}

Output:

MyPojo[id = 5, name = Bob, age = 23, savings = 2500.39]

Note: If you change your source map to a Map<String, Object> then you can copy over arbitrarily deep nested properties (with Map<String, String> you only get one level).

Empty dictionaries evaluate to False in Python:

>>> dct = {}
>>> bool(dct)
False
>>> not dct
True
>>>

Thus, your isEmpty function is unnecessary. All you need to do is:

def onMessage(self, socket, message):
    if not self.users:
        socket.send("Nobody is online, please use REGISTER command" \
                    " in order to register into the server")
    else:
        socket.send("ONLINE " + ' ' .join(self.users.keys()))

Is there anything wrong with

new Dictionary<KeyValuePair<object, object>, object>

a solution is using map and filter functions

python 2

d={"a":1,"b":2,"c":3}
l=("a","b","d")
map(d.__delitem__, filter(d.__contains__,l))
print(d)

python 3

d={"a":1,"b":2,"c":3}
l=("a","b","d")
list(map(d.__delitem__, filter(d.__contains__,l)))
print(d)

you get:

{'c': 3}

I'm using out of the box MVC4 with this code (note the two parameters inside ToDictionary)

 var result = new JsonResult()
 {
     Data = new
     {
         partials = GetPartials(data.Partials).ToDictionary(x => x.Key, y=> y.Value)
     }
 };

I get what's expected:

{"partials":{"cartSummary":"\u003cb\u003eCART SUMMARY\u003c/b\u003e"}}

Important: WebAPI in MVC4 uses JSON.NET serialization out of the box, but the standard web JsonResult action result doesn't. Therefore I recommend using a custom ActionResult to force JSON.NET serialization. You can also get nice formatting

Here's a simple actionresult JsonNetResult

http://james.newtonking.com/archive/2008/10/16/asp-net-mvc-and-json-net.aspx

You'll see the difference (and can make sure you're using the right one) when serializing a date:

Microsoft way:

 {"wireTime":"\/Date(1355627201572)\/"}

JSON.NET way:

 {"wireTime":"2012-12-15T19:07:03.5247384-08:00"}

In the case of determining whether only some keys match, this works:

any_keys_i_seek = ["key1", "key2", "key3"]

if set(my_dict).intersection(any_keys_i_seek):
    # code_here
    pass

Yet another option to find if only some keys match:

any_keys_i_seek = ["key1", "key2", "key3"]

if any_keys_i_seek & my_dict.keys():
    # code_here
    pass

LinkedHashMap current implementation (Java 8) keeps track of its tail. If performance is a concern and/or the map is large in size, you could access that field via reflection.

Because the implementation may change it is probably a good idea to have a fallback strategy too. You may want to log something if an exception is thrown so you know that the implementation has changed.

It could look like:

public static <K, V> Entry<K, V> getFirst(Map<K, V> map) {
  if (map.isEmpty()) return null;
  return map.entrySet().iterator().next();
}

public static <K, V> Entry<K, V> getLast(Map<K, V> map) {
  try {
    if (map instanceof LinkedHashMap) return getLastViaReflection(map);
  } catch (Exception ignore) { }
  return getLastByIterating(map);
}

private static <K, V> Entry<K, V> getLastByIterating(Map<K, V> map) {
  Entry<K, V> last = null;
  for (Entry<K, V> e : map.entrySet()) last = e;
  return last;
}

private static <K, V> Entry<K, V> getLastViaReflection(Map<K, V> map) throws NoSuchFieldException, IllegalAccessException {
  Field tail = map.getClass().getDeclaredField("tail");
  tail.setAccessible(true);
  return (Entry<K, V>) tail.get(map);
}

UPDATE: For an arbitrary length of a nested dictionary, go to this answer.

Use the defaultdict function from the collections.

High performance: "if key not in dict" is very expensive when the data set is large.

Low maintenance: make the code more readable and can be easily extended.

from collections import defaultdict

target_dict = defaultdict(dict)
target_dict[key1][key2] = val

I tried this:

class dotdict(dict):
    def __getattr__(self, name):
        return self[name]

you can try __getattribute__ too.

make every dict a type of dotdict would be good enough, if you want to init this from a multi-layer dict, try implement __init__ too.

>>> dic0 = {'dic0':0}
>>> dic1 = {'dic1':1}
>>> ndic = dict(dic0.items() + dic1.items())
>>> ndic
{'dic0': 0, 'dic1': 1}
>>>

The del statement removes an element:

del d[key]

Note that this mutates the existing dictionary, so the contents of the dictionary changes for anybody else who has a reference to the same instance. To return a new dictionary, make a copy of the dictionary:

def removekey(d, key):
    r = dict(d)
    del r[key]
    return r

The dict() constructor makes a shallow copy. To make a deep copy, see the copy module.

Note that making a copy for every dict del/assignment/etc. means you're going from constant time to linear time, and also using linear space. For small dicts, this is not a problem. But if you're planning to make lots of copies of large dicts, you probably want a different data structure, like a HAMT (as described in this answer).

Yes, but not with that version of the constructor. You can do this:

>>> dict([(1, 2), (3, 4)])
{1: 2, 3: 4}

There are several different ways to make a dict. As documented, "providing keyword arguments [...] only works for keys that are valid Python identifiers."

Assuming TreeMap is not good for you (and assuming you can't use generics):

List sortedKeys=new ArrayList(yourMap.keySet());
Collections.sort(sortedKeys);
// Do what you need with sortedKeys.

Not the most elegant solution, and only works 90% of the time:

def vardict(*args):
    ns = inspect.stack()[1][0].f_locals
    retval = {}
    for a in args:
        found = False
        for k, v in ns.items():
            if a is v:
                retval[k] = v
                if found:
                    raise ValueError("Value found in more than one local variable: " + str(a))
                found = True
        if found:
            continue
        if 'self' in ns:
            for k, v in ns['self'].__dict__.items():
                if a is v:
                    retval[k] = v
                    if found:
                        raise ValueError("Value found in more than one instance attribute: " + str(a))
                    found = True
        if found:
            continue
        for k, v in globals().items():
            if a is v:
                retval[k] = v
                if found:
                    raise ValueError("Value found in more than one global variable: " + str(a))
                found = True
        assert found, "Couldn't find one of the parameters."
    return retval

You'll run into problems if you store the same reference in multiple variables, but also if multiple variables store the same small int, since these get interned.

Python 3+:

inv_map = {v: k for k, v in my_map.items()}

Python 2:

inv_map = {v: k for k, v in my_map.iteritems()}

@dibrovsd: Solution will not work if the xml have more than one tag with same name

On your line of thought, I have modified the code a bit and written it for general node instead of root:

from collections import defaultdict
def xml2dict(node):
    d, count = defaultdict(list), 1
    for i in node:
        d[i.tag + "_" + str(count)]['text'] = i.findtext('.')[0]
        d[i.tag + "_" + str(count)]['attrib'] = i.attrib # attrib gives the list
        d[i.tag + "_" + str(count)]['children'] = xml2dict(i) # it gives dict
     return d

Just create a new array in your dictionary

Dictionary<string, List<string>> myDic = new Dictionary<string, List<string>>();
myDic.Add(newKey, new List<string>(existingList));

You could use use max and min with dict.get:

maximum = max(mydict, key=mydict.get)  # Just use 'min' instead of 'max' for minimum.
print(maximum, mydict[maximum])
# D 87

Use filter, or if the number of dictionaries in exampleSet is too high, use ifilter of the itertools module. It would return an iterator, instead of filling up your system's memory with the entire list at once:

from itertools import ifilter
for elem in ifilter(lambda x: x['type'] in keyValList, exampleSet):
    print elem

my_df = pd.DataFrame.from_dict(my_dict, orient='index', columns=['my_col'])

.. would have parsed the dict properly (putting each dict key into a separate df column, and key values into df rows), so the dicts would not get squashed into a single column in the first place.

Using Guava's Maps class' utility methods to compute the difference of 2 maps you can do it in a single line, with a method signature which makes it more clear what you are trying to accomplish:

public static void main(final String[] args) {
    // Create some maps
    final Map<Integer, String> map1 = new HashMap<Integer, String>();
    map1.put(1, "Hello");
    map1.put(2, "There");
    final Map<Integer, String> map2 = new HashMap<Integer, String>();
    map2.put(2, "There");
    map2.put(3, "is");
    map2.put(4, "a");
    map2.put(5, "bird");

    // Add everything in map1 not in map2 to map2
    map2.putAll(Maps.difference(map1, map2).entriesOnlyOnLeft());
}

If you can use jQuery then

var keys = [];
$.each(driversCounter, function(key, value) {
    keys.push(key);
});

console.log(JSON.stringify(keys));

Here follows the answer:

["one", "two", "three", "four", "five"]

And this way you wouldn't have to worry if the browser supports the Object.keys method or not.

The correct syntax ( as tested in VS 2008 SP1), is this:

public static class ErrorCode
{
    public static IDictionary<string, string> ErrorCodeDic;
     static ErrorCode()
    {
        ErrorCodeDic = new Dictionary<string, string>()
            { {"1", "User name or password problem"} };
    }
}

You can take keys or values per index:

int value = _dict.Values.ElementAt(5);//ElementAt value should be <= _dict.Count - 1
string key = _dict.Keys.ElementAt(5);//ElementAt value should be  < =_dict.Count - 1

In case we want all the Person (instead of only one Person) in the returning dictionary, we could:

var _people = personList
.GroupBy(p => p.FirstandLastName)
.ToDictionary(g => g.Key, g => g.Select(x=>x));

The "del" command is very useful for controlling data in an array, for example:

elements = ["A", "B", "C", "D"]
# Remove first element.
del elements[:1]
print(elements)

Output:

['B', 'C', 'D']

I had a similar problem (using 3.5) and lost 1/2 a day to it but here is a something that works - I am retired and just learning Python so I can help my grandson (12) with it.

mydict2={'Atlanta':78,'Macon':85,'Savannah':72}
maxval=(max(mydict2.values()))
print(maxval)
mykey=[key for key,value in mydict2.items()if value==maxval][0]
print(mykey)
YEILDS; 
85
Macon

You could use if type(ele) is dict or use isinstance(ele, dict) which would work if you had subclassed dict:

d = {'abc': 'abc', 'def': {'ghi': 'ghi', 'jkl': 'jkl'}}
for element in d.values():
    if isinstance(element, dict):
       for k, v in element.items():
           print(k,' ',v)

Here's one way to do it:

if not any(d['main_color'] == 'red' for d in a):
    # does not exist

The part in parentheses is a generator expression that returns True for each dictionary that has the key-value pair you are looking for, otherwise False.

If the key could also be missing the above code can give you a KeyError. You can fix this by using get and providing a default value. If you don't provide a default value, None is returned.

if not any(d.get('main_color', default_value) == 'red' for d in a):
    # does not exist

Your code was very close to working.

Try using a regular csv.writer rather than a DictWriter. The latter is mainly used for writing a list of dictionaries.

Here's some code that writes each key/value pair on a separate row:

import csv

somedict = dict(raymond='red', rachel='blue', matthew='green')
with open('mycsvfile.csv','wb') as f:
    w = csv.writer(f)
    w.writerows(somedict.items())

If instead you want all the keys on one row and all the values on the next, that is also easy:

with open('mycsvfile.csv','wb') as f:
    w = csv.writer(f)
    w.writerow(somedict.keys())
    w.writerow(somedict.values())

Pro tip: When developing code like this, set the writer to w = csv.writer(sys.stderr) so you can more easily see what is being generated. When the logic is perfected, switch back to w = csv.writer(f).

Even better, try an OrderedDict (assuming you want something like a list). Closer to a list than a regular dict since the keys have an order just like list elements have an order. With a regular dict, the keys have an arbitrary order.

Note that this is available in Python 3 and 2.7. If you want to use with an earlier version of Python you can find installable modules to do that.

There's no way to specify a StringComparer at the point where you try to get a value. If you think about it, "foo".GetHashCode() and "FOO".GetHashCode() are totally different so there's no reasonable way you could implement a case-insensitive get on a case-sensitive hash map.

You can, however, create a case-insensitive dictionary in the first place using:-

var comparer = StringComparer.OrdinalIgnoreCase;
var caseInsensitiveDictionary = new Dictionary<string, int>(comparer);

Or create a new case-insensitive dictionary with the contents of an existing case-sensitive dictionary (if you're sure there are no case collisions):-

var oldDictionary = ...;
var comparer = StringComparer.OrdinalIgnoreCase;
var newDictionary = new Dictionary<string, int>(oldDictionary, comparer);

This new dictionary then uses the GetHashCode() implementation on StringComparer.OrdinalIgnoreCase so comparer.GetHashCode("foo") and comparer.GetHashcode("FOO") give you the same value.

Alternately, if there are only a few elements in the dictionary, and/or you only need to lookup once or twice, you can treat the original dictionary as an IEnumerable<KeyValuePair<TKey, TValue>> and just iterate over it:-

var myKey = ...;
var myDictionary = ...;
var comparer = StringComparer.OrdinalIgnoreCase;
var value = myDictionary.FirstOrDefault(x => String.Equals(x.Key, myKey, comparer)).Value;

Or if you prefer, without the LINQ:-

var myKey = ...;
var myDictionary = ...;
var comparer = StringComparer.OrdinalIgnoreCase;
int? value;
foreach (var element in myDictionary)
{
  if (String.Equals(element.Key, myKey, comparer))
  {
    value = element.Value;
    break;
  }
}

This saves you the cost of creating a new data structure, but in return the cost of a lookup is O(n) instead of O(1).

While not strictly serialization, json may be reasonable approach here. That will handled nested dicts and lists, and data as long as your data is "simple": strings, and basic numeric types.

I have tried these hash functions and got the following result. I have about 960^3 entries, each 64 bytes long, 64 chars in different order, hash value 32bit. Codes from here.

Hash function    | collision rate | how many minutes to finish
==============================================================
MurmurHash3      |           6.?% |                      4m15s
Jenkins One..    |           6.1% |                      6m54s   
Bob, 1st in link |          6.16% |                      5m34s
SuperFastHash    |            10% |                      4m58s
bernstein        |            20% |       14s only finish 1/20
one_at_a_time    |          6.16% |                       7m5s
crc              |          6.16% |                      7m56s

One strange things is that almost all the hash functions have 6% collision rate for my data.

According to Mozilla

Object vs Map in JavaScript in short way with examples.

Object- follows the same concept as that of map i.e. using key-value pair for storing data. But there are slight differences which makes map a better performer in certain situations.

Map- is a data structure which helps in storing the data in the form of pairs. The pair consists of a unique key and a value mapped to the key. It helps prevent duplicity.

Key differences

• The Map is an instance of an object but the vice-versa is not true.

var map = new Map();_x000D_
var obj = new Object(); _x000D_
console.log(obj instanceof Map);   // false_x000D_
console.log(map instanceof Object);  // true

• In Object, the data-type of the key-field is restricted to integer, strings, and symbols. Whereas in Map, the key-field can be of any data-type (integer, an array, an object)

var map = new Map();//Empty _x000D_
map.set(1,'1');_x000D_
map.set('one', 1);_x000D_
map.set('{}', {name:'Hello world'});_x000D_
map.set(12.3, 12.3)_x000D_
map.set([12],[12345])_x000D_
_x000D_
for(let [key,value] of map.entries())_x000D_
  console.log(key+'---'+value)

• In the Map, the original order of elements is preserved. This is not true in case of objects.

let obj ={_x000D_
  1:'1',_x000D_
  'one':1,_x000D_
  '{}': {name:'Hello world'},_x000D_
  12.3:12.3,_x000D_
  [12]:[100]_x000D_
}_x000D_
console.log(obj)

The first version will add a new KeyValuePair to the dictionary, throwing if key is already in the dictionary. The second, using the indexer, will add a new pair if the key doesn't exist, but overwrite the value of the key if it already exists in the dictionary.

IDictionary<string, string> strings = new Dictionary<string, string>();

strings["foo"] = "bar";          //strings["foo"] == "bar"
strings["foo"] = string.Empty;   //strings["foo"] == string.empty
strings.Add("foo", "bar");       //throws     

this is when you have one dictionary list:

import csv
with open('names.csv', 'w') as csvfile:
    fieldnames = ['first_name', 'last_name']
    writer = csv.DictWriter(csvfile, fieldnames=fieldnames)
    writer.writeheader()
    writer.writerow({'first_name': 'Baked', 'last_name': 'Beans'})

Collection Interface has 3 views

• keySet
• values
• entrySet

Other have answered to to convert Hashmap into two lists of key and value. Its perfectly correct

My addition: How to convert "key-value pair" (aka entrySet)into list.

      Map m=new HashMap();
          m.put(3, "dev2");
          m.put(4, "dev3");

      List<Entry> entryList = new ArrayList<Entry>(m.entrySet());

      for (Entry s : entryList) {
        System.out.println(s);
      }

ArrayList has this constructor.

Do not use regular expressions to parse HTML.

But if you ever need to find all regexp matches in a string, use the findall function.

import re
line = 'bla bla bla<form>Form 1</form> some text...<form>Form 2</form> more text?'
matches = re.findall('<form>(.*?)</form>', line, re.DOTALL)
print(matches)

# Output: ['Form 1', 'Form 2']

Big O is the upper bound, while Omega is the lower bound. Theta requires both Big O and Omega, so that's why it's referred to as a tight bound (it must be both the upper and lower bound).

For example, an algorithm taking Omega(n log n) takes at least n log n time, but has no upper limit. An algorithm taking Theta(n log n) is far preferential since it takes at least n log n (Omega n log n) and no more than n log n (Big O n log n).

On Windows XP -

1. Reboot into "Safe mode with Command Prompt"
2. Type "explorer" in the command prompt that comes up and push [Enter]
3. Click on Start>Run, and type the following :

   rundll32.exe syssetup,SetupOobeBnk

This will reset the 30 day timer for activation back to 30 days so you can enter in the key normally.

For those using Gradle (instead of Maven) :

springBoot {
    mainClass = "com.example.Main"
}

This is may be late but for those who are still looking for answer for this I found a project on git hub and this is the only one that actually fit my needs. android-materialshadowninepatch

Just add this line on your build.gradle dependency

compile 'com.h6ah4i.android.materialshadowninepatch:materialshadowninepatch:0.6.3'

cheers. thumbs up for the creator ! happycodings

Suppose we want to run your Django web server (in Linux) that there is space between your path (path='/home/<you>/<first-path-section> <second-path-section>'), so do the following:

import subprocess

args = ['{}/manage.py'.format('/home/<you>/<first-path-section> <second-path-section>'), 'runserver']
res = subprocess.Popen(args, stdout=subprocess.PIPE)
output, error_ = res.communicate()

if not error_:
    print(output)
else:
    print(error_)

[Note]:

• Do not forget accessing permission: chmod 755 -R <'yor path'>
• manage.py is exceutable: chmod +x manage.py

No ... on all Windows platforms DWORD is 32 bits. LONGLONG or LONG64 is used for 64 bit types.

just a point,

numbers = [int(x) for x in numbers]

the list comprehension is more natural, while

numbers = map(int, numbers)

is faster.

Probably this will not matter in most cases

Useful read: LP vs map

template <class outType, class inType>
outType safe_cast(inType pointer)
{
    void* temp = static_cast<void*>(pointer);
    return static_cast<outType>(temp);
}

I tried to conclude and wrote a simple safe cast using templates. Note that this solution doesn't guarantee to cast pointers on a functions.

You can also use (focusout) event:

Use (eventName) for while binding event to DOM, basically () is used for event binding. Also you can use ngModel to get two way binding for your model. With the help of ngModel you can manipulate model variable value inside your component.

Do this in HTML file

<input type="text" [(ngModel)]="model" (focusout)="someMethodWithFocusOutEvent($event)">

And in your (component) .ts file

export class AppComponent { 
 model: any;
 constructor(){ }
 someMethodWithFocusOutEvent(){
   console.log('Your method called');
   // Do something here
 }
}

Had this problem and solved typing this : C:\Program Files (x86)\Java\jdk1.7.0_51\bin\javadoc.exe

You can simply use JavaScripts join() function for that. This would simply look like a.value.join(','). The output would be a string though.

This is my databdase definition in my docker-compose:

dataBase:
    image: mysql:8.0
    volumes:
        - db_data:/var/lib/mysql
    networks:
        z-net:
            ipv4_address: 172.26.0.2
    restart: always
    entrypoint: ['docker-entrypoint.sh', '--default-authentication-plugin=mysql_native_password']
    environment:
        MYSQL_ROOT_PASSWORD: supersecret
        MYSQL_DATABASE: zdb
        MYSQL_USER: zuser
        MYSQL_PASSWORD: zpass
    ports:
        - "3333:3306"

The relevant line there is entrypoint.

After build and up it, you can test it with:

$ mysql -u zuser -pzpass --host=172.26.0.2  zdb -e "select 1;"
Warning: Using a password on the command line interface can be insecure.
+---+
| 1 |
+---+
| 1 |
+---+

Don't make it a int(), but make it a range() will solve this problem.

inp = range(input("Enter a number: "))

This might be an old qustion, but just to keep things updated, there is a forEach method in javascript that works with NodeJS. Here's the link from the docs. And an example:

     count = countElements.length;
        if (count > 0) {
            countElements.forEach(function(countElement){
                console.log(countElement);
            });
        }

python manage.py migrate <app> zero

sqlclear was removed from 1.9.

Release notes mention that it is due to the introduction of migrations: https://docs.djangoproject.com/en/1.9/releases/1.9/

Unfortunately I could not find a method that works on all apps at once, nor a built-in way to list all installed apps from the admin: How to list all installed apps with manage.py in Django?

Related: How to reset migrations in Django 1.7?

As per latest standards, this is how it should be done.

print("My name is {!s} and my number is{:d}".format("Agnel Vishal",100))

Do check python3.6 docs and sample program

I'm assuming you want all three of those as part of the selection criteria. You'll need a few statements in your where but they will be similar to the link your question contained.

SELECT *
  FROM MyTable
  WHERE [dateColumn] > '3/1/2009' AND [dateColumn] <= DATEADD(day,1,'3/31/2009') 
        --make it inclusive for a datetime type
    AND DATEPART(hh,[dateColumn]) >= 6 AND DATEPART(hh,[dateColumn]) <= 22 
        -- gets the hour of the day from the datetime
    AND DATEPART(dw,[dateColumn]) >= 3 AND DATEPART(dw,[dateColumn]) <= 5 
        -- gets the day of the week from the datetime

Hope this helps.

The JVM doesn't know anything about off-heap memory. Ehcache implements an on-disk cache as well as an in-memory cache.

With latest version of windows (e.g. Windows 10, other servers), type/search for "Developers Command prompt.." It will pop up the relevant command prompt for the Visual Studio version.

e.g. Developer Command Prompt for VS 2015

More here https://msdn.microsoft.com/en-us/library/ms229859(v=vs.110).aspx

From the MySQL manual:

PERIOD_DIFF(P1,P2)

Returns the number of months between periods P1 and P2. P1 and P2 should be in the format YYMM or YYYYMM. Note that the period arguments P1 and P2 are not date values.

mysql> SELECT PERIOD_DIFF(200802,200703); -> 11

So it may be possible to do something like this:

Select period_diff(concat(year(d1),if(month(d1)<10,'0',''),month(d1)), concat(year(d2),if(month(d2)<10,'0',''),month(d2))) as months from your_table;

Where d1 and d2 are the date expressions.

I had to use the if() statements to make sure that the months was a two digit number like 02 rather than 2.

This wikipedia article has an example in C.

A good example is that new modules written to augment the Apache Web server register with the main apache process by passing them function pointers so those functions are called back to process web page requests.

If a <script> has a src then the text content of the element will be not be executed as JS (although it will appear in the DOM).

You need to use multiple script elements.

1. a <script> to load the external script

2. a <script> to hold your inline code (with the call to the function in the external script)

   scroll_messages();

What about

Game.status[0][0] or Game.status[0]["0"] ?

Does one of these work?

PS: What you have in your question is a Javascript Object, not JSON. JSON is the 'string' version of a Javascript Object.

I got this error: "Source option 5 is no longer supported. Use 6 or later" after I changed the pom.xml

<java.version>7</java.version>

to

<java.version>11</java.version>

Later to realise the property was used with a dash insteal of a dot:

  <source>${java-version}</source>
  <target>${java-version}</target>

(swearings), I replaced the dot with a dash and the error went away:

<java-version>11</javaversion>

If you are on PowerShell 2.0, use PowerShell.exe's -File parameter to invoke a script from another environment, like cmd.exe. For example:

Powershell.exe -File C:\my_path\yada_yada\run_import_script.ps1

1. Go to start run=>services.msc=>SQL SERVER(MSSQLSERVER) stop the service
2. Right click on SQL SERVER(MSSQLSERVER)=> properties=>LogOn Tab=>Local System Account=>OK
3. Restart the SQL server Management Studio.

what worked for me

1. goto Settings -> Additional Settings -> Developer options -> Revoke USB Debugging Authorizations.

2. Kill adb.exe in the taskmanager (CTRL + SHIFT + ESCAPE)

3. Install again, watch for popups (accept RSA signature and install) Everything will work now

Node.js csvtojson module is a comprehensive nodejs csv parser. It can be used as node.js app library / a command line tool / or browser with help of browserify or webpack.

the source code can be found at: https://github.com/Keyang/node-csvtojson

It is fast with low memory consumption yet powerful to support any of parsing needs with abundant API and easy to read documentation.

The detailed documentation can be found here

Here are some code examples:

Use it as a library in your Node.js application ([email protected] +):

1. Install it through npm

npm install --save csvtojson@latest

2. Use it in your node.js app:

// require csvtojson
var csv = require("csvtojson");

// Convert a csv file with csvtojson
csv()
  .fromFile(csvFilePath)
  .then(function(jsonArrayObj){ //when parse finished, result will be emitted here.
     console.log(jsonArrayObj); 
   })

// Parse large csv with stream / pipe (low mem consumption)
csv()
  .fromStream(readableStream)
  .subscribe(function(jsonObj){ //single json object will be emitted for each csv line
     // parse each json asynchronousely
     return new Promise(function(resolve,reject){
         asyncStoreToDb(json,function(){resolve()})
     })
  }) 

//Use async / await
const jsonArray=await csv().fromFile(filePath);

Use it as a command-line tool:

sh# npm install csvtojson
sh# ./node_modules/csvtojson/bin/csvtojson ./youCsvFile.csv

-or-

sh# npm install -g csvtojson
sh# csvtojson ./yourCsvFile.csv

For advanced usage:

sh# csvtojson --help

You can find more details from the github page above.

npm install nodemon --save-dev

Next package.json on and

"scripts": {
"test": "echo \"Error: no test specified\" && exit 1",
"start": "nodemon app.js"
}

Type on terminal (command prompt)

npm start

If you need some es6 improvements not supported by Typescript, you can target es6 in your tsconfig and use Babel to convert your files in es5.

For others who may need this, here's an answer.

Use adb shell dumpsys alarm

You can know the alarm has been set and when are they going to alarmed and interval. Also how many times this alarm has been invoked.

Casting to an int implicitly drops any decimal. No need to call Math.floor() (assuming positive numbers)

Simply typecast with (int), e.g.:

System.out.println((int)(99.9999)); // Prints 99

This being said, it does have a different behavior from Math.floor which rounds towards negative infinity (@Chris Wong)

https://github.com/hraban/tomono as another mention of a script-based solution.

I am not the author but used it and it does the job.

One positive aspect is that you get all the branches and all the history into the final repo. For my repos (no duplicate folders in repos - actually, they came out of tfs2git migration) there were no conflicts and everything ran automated.

It is mainly used (see name) to create monorepos.

For Windows users: git bash can execute the .sh file. It comes with the standard git installation.

First question:

Use the Intent to call another Activity. In the Manifest, you should add

<activity android:name="ListViewImage"></activity>
<activity android:name="com.company.listview.ListViewImage">
</activity>

And in your current activity,

btListe = (ImageButton)findViewById(R.id.Button_Liste);
    btListe.setOnClickListener(new OnClickListener()
    {    public void onClick(View v)
        {
            intent = new Intent(main.this, ListViewImage.class);
            startActivity(intent);
            finish();
        }
    });

Second question:

sendButton.setOnClickListener(new OnClickListener() {
        public void onClick(View v) {
            String valueString = editValue.getText().toString();
            long value;
            if (valueString != null) {
                value = Long.parseLong(valueString);
            }
            else {
                value = 0;
            }

            Bundle sendBundle = new Bundle();
            sendBundle.putLong("value", value);

            Intent i = new Intent(Activity1.this, Activity2.class);
            i.putExtras(sendBundle);
            startActivity(i);

            finish();
        }
    });

and in Activity2:

 Bundle receiveBundle = this.getIntent().getExtras();
    final long receiveValue = receiveBundle.getLong("value");
    receiveValueEdit.setText(String.valueOf(receiveValue));
    callReceiverButton.setOnClickListener(new OnClickListener() {
        public void onClick(View v) {
            Intent i = new Intent(Activity2.this, Receiver.class);
            i.putExtra("new value", receiveValue - 10);
        }
    });

Choose Open Transcript from the ... dropdown to the right of the vote up/down and share links.

This will open a Transcript scrolling div on the right side.

You can then use Copy. Note that you cannot use Select All but need to click the top line, then scroll to the bottom using the scroll thumb, and then shift-click on the last line.

Note that you can also search within this text using the normal web page search.

This is an old question and had many answers, but none of those fit well enough to my context. In my case, the containers are very lean and do not contain any of the networking tools necessary to extract the host's ip address from within the container.

Also, usin the --net="host" approach is a very rough approach that is not applicable when one wants to have well isolated network configuration with several containers.

So, my approach is to extract the hosts' address at the host's side, and then pass it to the container with --add-host parameter:

$ docker run --add-host=docker-host:`ip addr show docker0 | grep -Po 'inet \K[\d.]+'` image_name

or, save the host's IP address in an environment variable and use the variable later:

$ DOCKERIP=`ip addr show docker0 | grep -Po 'inet \K[\d.]+'`
$ docker run --add-host=docker-host:$DOCKERIP image_name

And then the docker-host is added to the container's hosts file, and you can use it in your database connection strings or API URLs.

According Spring 4 MVC ResponseEntity.BodyBuilder and ResponseEntity Enhancements Example it could be written as:

....
   return ResponseEntity.ok().build();
....
   return ResponseEntity.noContent().build();

UPDATE:

If returned value is Optional there are convinient method, returned ok() or notFound():

return ResponseEntity.of(optional)

C# Version History:

C# is a simple and powerful object-oriented programming language developed by Microsoft.

C# has evolved much since its first release in 2002. C# was introduced with .NET Framework 1.0.

The following table lists important features introduced in each version of C#.

And the latest version of C# is available in C# Versions.

1:

Or you can use temporary array and then delete the real one if you want to change it while in cycle:

$array = array(0 => 'a', 1 => 'b', 2 => 'c');
$temp_array = $array[1];

unset($array[1]);
array_unshift($array , $temp_array);

the output will be:

array(0 => 'b', 1 => 'a', 2 => 'c')

and when are doing it while in cycle, you should clean $temp_array after appending item to array.

Instead of Find & Replace, you can right click the namespace in code and Refactor -> Rename.

Thanks to @Jimmy for this.

I can't repro, but I suspect that in your actual code there is a constraint somewhere that T : class - you need to propagate that to make the compiler happy, for example (hard to say for sure without a repro example):

public class Derived<SomeModel> : Base<SomeModel> where SomeModel : class, IModel
                                                                    ^^^^^
                                                                 see this bit

.text() - for jquery

$('.title').clone()    //clone the element
.children() //select all the children
.remove()   //remove all the children
.end()  //again go back to selected element
.text();    //get the text of element

Use rgba as most of the commonly used browsers supports it..

.social img:hover {
 background-color: rgba(0, 0, 0, .5)
}

Try this one with retina display

/* Smartphones (portrait and landscape) ----------- */
@media only screen 
and (min-device-width : 320px) 
and (max-device-width : 480px) {
/* Styles */
}

/* Smartphones (landscape) ----------- */
@media only screen 
and (min-width : 321px) {
/* Styles */
}

/* Smartphones (portrait) ----------- */
@media only screen 
and (max-width : 320px) {
/* Styles */
}

/* iPads (portrait and landscape) ----------- */
@media only screen 
and (min-device-width : 768px) 
and (max-device-width : 1024px) {
/* Styles */
}

/* iPads (landscape) ----------- */
@media only screen 
and (min-device-width : 768px) 
and (max-device-width : 1024px) 
and (orientation : landscape) {
/* Styles */
}

/* iPads (portrait) ----------- */
@media only screen 
and (min-device-width : 768px) 
and (max-device-width : 1024px) 
and (orientation : portrait) {
/* Styles */
}

/* Desktops and laptops ----------- */
@media only screen 
and (min-width : 1224px) {
/* Styles */
}

/* Large screens ----------- */
@media only screen 
and (min-width : 1824px) {
/* Styles */
}

/* iPhone 4 ----------- */
@media
only screen and (-webkit-min-device-pixel-ratio : 1.5),
only screen and (min-device-pixel-ratio : 1.5) {
/* Styles */
}

Update

/* Smartphones (portrait and landscape) ----------- */
@media only screen and (min-device-width: 320px) and (max-device-width: 480px) {
  /* Styles */
}

/* Smartphones (landscape) ----------- */
@media only screen and (min-width: 321px) {
  /* Styles */
}

/* Smartphones (portrait) ----------- */
@media only screen and (max-width: 320px) {
  /* Styles */
}

/* iPads (portrait and landscape) ----------- */
@media only screen and (min-device-width: 768px) and (max-device-width: 1024px) {
  /* Styles */
}

/* iPads (landscape) ----------- */
@media only screen and (min-device-width: 768px) and (max-device-width: 1024px) and (orientation: landscape) {
  /* Styles */
}

/* iPads (portrait) ----------- */
@media only screen and (min-device-width: 768px) and (max-device-width: 1024px) and (orientation: portrait) {
  /* Styles */
}

/* iPad 3 (landscape) ----------- */
@media only screen and (min-device-width: 768px) and (max-device-width: 1024px) and (orientation: landscape) and (-webkit-min-device-pixel-ratio: 2) {
  /* Styles */
}

/* iPad 3 (portrait) ----------- */
@media only screen and (min-device-width: 768px) and (max-device-width: 1024px) and (orientation: portrait) and (-webkit-min-device-pixel-ratio: 2) {
  /* Styles */
}

/* Desktops and laptops ----------- */
@media only screen and (min-width: 1224px) {
  /* Styles */
}

/* Large screens ----------- */
@media only screen and (min-width: 1824px) {
  /* Styles */
}

/* iPhone 4 (landscape) ----------- */
@media only screen and (min-device-width: 320px) and (max-device-width: 480px) and (orientation: landscape) and (-webkit-min-device-pixel-ratio: 2) {
  /* Styles */
}

/* iPhone 4 (portrait) ----------- */
@media only screen and (min-device-width: 320px) and (max-device-width: 480px) and (orientation: portrait) and (-webkit-min-device-pixel-ratio: 2) {
  /* Styles */
}

/* iPhone 5 (landscape) ----------- */
@media only screen and (min-device-width: 320px) and (max-device-height: 568px) and (orientation: landscape) and (-webkit-device-pixel-ratio: 2) {
  /* Styles */
}

/* iPhone 5 (portrait) ----------- */
@media only screen and (min-device-width: 320px) and (max-device-height: 568px) and (orientation: portrait) and (-webkit-device-pixel-ratio: 2) {
  /* Styles */
}

/* iPhone 6 (landscape) ----------- */
@media only screen and (min-device-width: 375px) and (max-device-height: 667px) and (orientation: landscape) and (-webkit-device-pixel-ratio: 2) {
  /* Styles */
}

/* iPhone 6 (portrait) ----------- */
@media only screen and (min-device-width: 375px) and (max-device-height: 667px) and (orientation: portrait) and (-webkit-device-pixel-ratio: 2) {
  /* Styles */
}

/* iPhone 6+ (landscape) ----------- */
@media only screen and (min-device-width: 414px) and (max-device-height: 736px) and (orientation: landscape) and (-webkit-device-pixel-ratio: 2) {
  /* Styles */
}

/* iPhone 6+ (portrait) ----------- */
@media only screen and (min-device-width: 414px) and (max-device-height: 736px) and (orientation: portrait) and (-webkit-device-pixel-ratio: 2) {
  /* Styles */
}

/* Samsung Galaxy S3 (landscape) ----------- */
@media only screen and (min-device-width: 320px) and (max-device-height: 640px) and (orientation: landscape) and (-webkit-device-pixel-ratio: 2) {
  /* Styles */
}

/* Samsung Galaxy S3 (portrait) ----------- */
@media only screen and (min-device-width: 320px) and (max-device-height: 640px) and (orientation: portrait) and (-webkit-device-pixel-ratio: 2) {
  /* Styles */
}

/* Samsung Galaxy S4 (landscape) ----------- */
@media only screen and (min-device-width: 320px) and (max-device-height: 640px) and (orientation: landscape) and (-webkit-device-pixel-ratio: 3) {
  /* Styles */
}

/* Samsung Galaxy S4 (portrait) ----------- */
@media only screen and (min-device-width: 320px) and (max-device-height: 640px) and (orientation: portrait) and (-webkit-device-pixel-ratio: 3) {
  /* Styles */
}

/* Samsung Galaxy S5 (landscape) ----------- */
@media only screen and (min-device-width: 360px) and (max-device-height: 640px) and (orientation: landscape) and (-webkit-device-pixel-ratio: 3) {
  /* Styles */
}

/* Samsung Galaxy S5 (portrait) ----------- */
@media only screen and (min-device-width: 360px) and (max-device-height: 640px) and (orientation: portrait) and (-webkit-device-pixel-ratio: 3) {
  /* Styles */
}

Use the Bootstrap Customizer to generate a version of Bootstrap that has a taller navbar. The value you want to change is @navbar-height in the Navbar section.

Inspect your current implementation to see how tall your navbar is with the 50px brand image, and use that calculated height in the Customizer.

You can use the cmath module.

If the number is converted to a complex format, then it becomes easier to just call the polar method on the number.

import cmath
input_num = complex(1, 2) # stored as 1+2j
r, phi = cmath.polar(input_num)

Maybe

df <- do.call("cbind", list(df, rep(list(NA),length(namevector))))
colnames(df)[-1*(1:(ncol(df) - length(namevector)))] <- namevector

Well, you don't want to execute 1000 query calls, but doing this is fine:

$stmt= array( 'array of statements' );
$query= 'INSERT INTO yourtable (col1,col2,col3) VALUES ';
foreach( $stmt AS $k => $v ) {
  $query.= '(' .$v. ')'; // NOTE: you'll have to change to suit
  if ( $k !== sizeof($stmt)-1 ) $query.= ', ';
}
$r= mysql_query($query);

Depending on your data source, populating the array might be as easy as opening a file and dumping the contents into an array via file().

Although this is probably not that appropriate for this situation I found out the other day that you can also use the delete keyword to remove an item from an array if you don't need to alter the size of the array e.g.

var myArray = [1,2,3];

delete myArray[1];

console.log(myArray[1]); //undefined

console.log(myArray.length); //3 - doesn't actually shrink the array down

For using Google SignIn in Android app, you need

google-services.json

which you can generate using the instruction mentioned here

As AlienWebGuy said, you can use background-image. I'd suggest you use background, but it will need three more properties after the URL:

background: url("http://www.gentleface.com/i/free_toolbar_icons_16x16_black.png") 0 0 no-repeat;

Explanation: the two zeros are x and y positioning for the image; if you want to adjust where the background image displays, play around with these (you can use both positive and negative values, e.g: 1px or -1px).

No-repeat says you don't want the image to repeat across the entire background. This can also be repeat-x and repeat-y.

Efficient solution

Convolution is much better than straightforward approach, but (I guess) it uses FFT and thus quite slow. However specially for computing the running mean the following approach works fine

def running_mean(x, N):
    cumsum = numpy.cumsum(numpy.insert(x, 0, 0)) 
    return (cumsum[N:] - cumsum[:-N]) / float(N)

The code to check

In[3]: x = numpy.random.random(100000)
In[4]: N = 1000
In[5]: %timeit result1 = numpy.convolve(x, numpy.ones((N,))/N, mode='valid')
10 loops, best of 3: 41.4 ms per loop
In[6]: %timeit result2 = running_mean(x, N)
1000 loops, best of 3: 1.04 ms per loop

Note that numpy.allclose(result1, result2) is True, two methods are equivalent. The greater N, the greater difference in time.

warning: although cumsum is faster there will be increased floating point error that may cause your results to be invalid/incorrect/unacceptable

the comments pointed out this floating point error issue here but i am making it more obvious here in the answer..

# demonstrate loss of precision with only 100,000 points
np.random.seed(42)
x = np.random.randn(100000)+1e6
y1 = running_mean_convolve(x, 10)
y2 = running_mean_cumsum(x, 10)
assert np.allclose(y1, y2, rtol=1e-12, atol=0)

• the more points you accumulate over the greater the floating point error (so 1e5 points is noticable, 1e6 points is more significant, more than 1e6 and you may want to resetting the accumulators)
• you can cheat by using np.longdouble but your floating point error still will get significant for relatively large number of points (around >1e5 but depends on your data)
• you can plot the error and see it increasing relatively fast
• the convolve solution is slower but does not have this floating point loss of precision
• the uniform_filter1d solution is faster than this cumsum solution AND does not have this floating point loss of precision

To date, there isn't a native VS Code editor for android, but projects do exist like Microsoft/monaco-editor which aim to provide a native experience in the browser.

CodeSandbox is a sophisticated online editor built around Monaco

In WPF an image is typically loaded from a Stream or an Uri.

BitmapImage supports both and an Uri can even be passed as constructor argument:

var uri = new Uri("http://...");
var bitmap = new BitmapImage(uri);

If the image file is located in a local folder, you would have to use a file:// Uri. You could create such a Uri from a path like this:

var path = Path.Combine(Environment.CurrentDirectory, "Bilder", "sas.png");
var uri = new Uri(path);

If the image file is an assembly resource, the Uri must follow the the Pack Uri scheme:

var uri = new Uri("pack://application:,,,/Bilder/sas.png");

In this case the Visual Studio Build Action for sas.png would have to be Resource.

Once you have created a BitmapImage and also have an Image control like in this XAML

<Image Name="image1" />

you would simply assign the BitmapImage to the Source property of that Image control:

image1.Source = bitmap;

Using what others mentioned, I wanted this to be a quick & dandy function in my bash shell.

Create a file: ~/.functions

Add to it the contents:

getline() { line=$1 sed $line'q;d' $2 }

Then add this to your ~/.bash_profile:

source ~/.functions

Now when you open a new bash window, you can just call the function as so:

getline 441 myfile.txt

To get a random integer value between 1 and N (inclusive) you can use the following.

CInt(Math.Ceiling(Rnd() * n)) + 1

I've modified your script to work with jQuery, if you wish to do so.

$(document).ready(function(){
    //To add a task when the user hits the return key
    $('#task-text').keydown(function(evt){
          if(evt.keyCode == 13)
          {
             add_task($(this), evt);
          }
    });
    //To add a task when the user clicks on the submit button
    $("#add-task").click(function(evt){
        add_task($("#task-text"),evt);
    });
});

function add_task(textBox, evt){
  evt.preventDefault();
  var taskText = textBox.val();
  $("<li />").text(taskText).appendTo("#tasks");
  textBox.val("");
};

Just have a line added to your crontab..

Make sure the file is executable:

chmod +x /path_to_you_file/your_file

To edit crontab file:

crontab -e

Line you have to add:

@reboot  /path_to_you_file/your_file

That simple!

Modification from @veeresh i

 var data=[

                        { id: 1, color: 'yellow' },
                        { id: 2, color: 'blue' },
                        { id: 3, color: 'red' }
                        ]; //parameter
        var para={};
        para.datav=data;   //datav from View


        $.ajax({
                    traditional: true,
                    url: "/Conroller/MethodTest",
                    type: "POST",
                    contentType: "application/json; charset=utf-8",
                    data:para,
                    success: function (data) {
                        $scope.DisplayError(data.requestStatus);
                    }
                });

In MVC



public class Thing
    {
        public int id { get; set; }
        public string color { get; set; }
    }

    public JsonResult MethodTest(IEnumerable<Thing> datav)
        {
       //now  datav is having all your values
      }

The CSS class that can be changed to add a image to the JQuery slider handle is called ".ui-slider-horizontal .ui-slider-handle".

The following code shows a demo:

<!DOCTYPE html>
<html>
<head>
  <link type="text/css" href="http://jqueryui.com/latest/themes/base/ui.all.css" rel="stylesheet" />
  <script type="text/javascript" src="http://jqueryui.com/latest/jquery-1.3.2.js"></script>
  <script type="text/javascript" src="http://jqueryui.com/latest/ui/ui.core.js"></script>
  <script type="text/javascript" src="http://jqueryui.com/latest/ui/ui.slider.js"></script>
  <style type="text/css">
  .ui-slider-horizontal .ui-state-default {background: white url(http://stackoverflow.com/content/img/so/vote-arrow-down.png) no-repeat scroll 50% 50%;}
  </style>
  <script type="text/javascript">
  $(document).ready(function(){
    $("#slider").slider();
  });
  </script>
</head>
<body>
<div id="slider"></div>
</body>
</html>

I think registering a handle option was the old way of doing it and no longer supported in JQuery-ui 1.7.2?

Set the width and height to wrapper element of the sprite image. Use this css.

{
    background-size: cover;
}

You don't want git revert. That undoes a previous commit. You want git checkout to get git's version of the file from master.

git checkout -- filename.txt

In general, when you want to perform a git operation on a single file, use -- filename.

• git-checkout Documentation
• git-revert Documentation

2020 Update

Git introduced a new command git restore in version 2.23.0. Therefore, if you have git version 2.23.0+, you can simply git restore filename.txt - which does the same thing as git checkout -- filename.txt. The docs for this command do note that it is currently experimental.

• git-restore Documentation

ORDER_BY cast(registration_no as unsigned) ASC

gives the desired result with warnings.

Hence, better to go for

ORDER_BY registration_no + 0 ASC

for a clean result without any SQL warnings.

PROMPT> gem uninstall cocoapods

Select gem to uninstall:
 1. cocoapods-0.32.1
 2. cocoapods-0.33.1
 3. cocoapods-0.36.0.beta.2
 4. cocoapods-0.38.2
 5. cocoapods-0.39.0
 6. cocoapods-1.0.0
 7. All versions
> 6
Successfully uninstalled cocoapods-1.0.0
PROMPT> gem install cocoapods -v 0.39.0
Successfully installed cocoapods-0.39.0
Parsing documentation for cocoapods-0.39.0
Done installing documentation for cocoapods after 1 seconds
1 gem installed
PROMPT> pod --version
0.39.0
PROMPT>

It takes 2 simple steps. [/q means quiet, /f means forced, /s means subdir]

1. Empty out the directory to remove

   del *.* /f/s/q  
   

2. Remove the directory

   cd ..
   rmdir dir_name /q/s
   

Apart from having a Path variable, the directory C:\data\db is mandatory.

Create this and the error shall be solved.

Well you are trying to compare Date with Nvarchar which is wrong. Should be

Where dates between date1 And date2
-- both date1 & date2 should be date/datetime

If date1,date2 strings; server will convert them to date type before filtering.

Array.indexOf was introduced in JavaScript 1.6, but it is not supported in older browsers. Thankfully the chaps over at Mozilla have done all the hard work for you, and provided you with this for compatibility:

if (!Array.prototype.indexOf)
{
  Array.prototype.indexOf = function(elt /*, from*/)
  {
    var len = this.length >>> 0;

    var from = Number(arguments[1]) || 0;
    from = (from < 0)
         ? Math.ceil(from)
         : Math.floor(from);
    if (from < 0)
      from += len;

    for (; from < len; from++)
    {
      if (from in this &&
          this[from] === elt)
        return from;
    }
    return -1;
  };
}

There are even some handy usage snippets for your scripting pleasure.

I've not had much luck with \r\n regular expressions from the find/replace window.

However, this works in Notepad++ v4.1.2:

1. Use the "View | Show end of line" menu to enable display of end of line characters. (Carriage return line feeds should show up as a single shaded CRLF 'character'.)

2. Select one of the CRLF 'characters' (put the cursor just in front of one, hold down the SHIFT key, and then pressing the RIGHT CURSOR key once).

3. Copy the CRLF character to the clipboard.

4. Make sure that you don't have the find or find/replace dialog open.

5. Open the find/replace dialog. The 'Find what' field shows the contents of the clipboard: in this case the CRLF character - which shows up as 2 'box characters' (presumably it's an unprintable character?)

6. Ensure that the 'Regular expression' option is OFF.

Now you should be able to count, find, or replace as desired.

Have the same problem with white screen during transition from one fragment to another. Have navigation and animations set in action in navigation.xml.

Background in all fragments the same but white blank screen. So i set navOptions in fragment during executing transition

          //Transition options
        val options = navOptions {
            anim {
                enter = R.anim.slide_in_right
                exit = R.anim.slide_out_left
                popEnter = R.anim.slide_in_left
                popExit = R.anim.slide_out_right
            }
        }

.......................

  this.findNavController().navigate(SampleFragmentDirections.actionSampleFragmentToChartFragment(it),
                    options)

It worked for me. No white screen between transistion. Magic )

Recently D3js is able to handle local json file.

This is the issue https://github.com/mbostock/d3/issues/673

This is the patch inorder for D3 to work with local json files. https://github.com/mbostock/d3/pull/632

In my opinion, utilizing Object.freeze allows for a DRYer and more declarative style. My preferred pattern is:

./lib/constants.js

module.exports = Object.freeze({
    MY_CONSTANT: 'some value',
    ANOTHER_CONSTANT: 'another value'
});

./lib/some-module.js

var constants = require('./constants');

console.log(constants.MY_CONSTANT); // 'some value'

constants.MY_CONSTANT = 'some other value';

console.log(constants.MY_CONSTANT); // 'some value'

Outdated Performance Warning

The following issue was fixed in v8 in Jan 2014 and is no longer relevant to most developers:

Be aware that both setting writable to false and using Object.freeze have a massive performance penalty in v8 - https://bugs.chromium.org/p/v8/issues/detail?id=1858 and http://jsperf.com/performance-frozen-object

unchecked the "Automatically detect settings" in the Local Area Network Settings (found in "Internet Options" > Connections > LAN Settings.

You can try using the following code to solve your problem:

 <activity
     android:name=".DonateNow"
     android:label="@string/title_activity_donate_now"
     android:screenOrientation="portrait"
     android:theme="@style/AppTheme"
     android:windowSoftInputMode="stateVisible|adjustPan">
 </activity>

I don't know why but for me the solution proposed by Marius Stanescu is breaking the specificity of col (a col-md-3 followed by a col-md-4 will take all of the twelve row)

I found another working solution :

.bottom-column 
{
   display: inline-block;
   vertical-align: middle;
   float: none;
}

Yes, you can use GT for free. See the post with explanation. And look at repo on GitHub.

UPD 19.03.2019 Here is a version for browser on GitHub.

Using groupby you could split into two dataframes like

In [1047]: df1, df2 = [x for _, x in df.groupby(df['Sales'] < 30)]

In [1048]: df1
Out[1048]:
   A  Sales
2  7     30
3  6     40
4  1     50

In [1049]: df2
Out[1049]:
   A  Sales
0  3     10
1  4     20

Windows environment, local machine. I had an error

[js] Error: couldn't connect to server 127.0.0.1:27017, connection attempt failed: SocketException: 
Error connecting to 127.0.0.1:27017 :: caused by :: 
No connection could be made because the target machine actively refused it. :

After some back and forth attempts I decided

• to check Windows "Task Manager". I noticed that MongoDB process is stopped.
• I made it run. Everything starts working as expected.

Assuming that your Sheet1 is not necessary active you would need to use this improved code of yours:

i = ActiveWorkbook.Worksheets("Sheet1").Range("A2" , Worksheets("Sheet1").Range("A2").End(xlDown)).Rows.Count

Look into full worksheet reference for second argument for Range(arg1, arg2) which important in this situation.

I had the same:

Error opening registry key 'Software\JavaSoft\Java Runtime Environment

Clearing Windows\SysWOW64 doesn't help for Win7

In my case it installing JDK8 offline helped (from link)

Rather humorously, considering your tags, just use the ImageButton widget.

Just use:

overflow: hidden;
white-space: nowrap;

In your item's divs

Something like this should work (untested code warning):

<?php

$html = '<p style="asd">qwe</p><br /><p class="qwe">qweqweqwe</p>';

$domd = new DOMDocument();
libxml_use_internal_errors(true);
$domd->loadHTML($html);
libxml_use_internal_errors(false);

$domx = new DOMXPath($domd);
$items = $domx->query("//p[@style]");

foreach($items as $item) {
  $item->removeAttribute("style");
}

echo $domd->saveHTML();

Pure Javascript solution

theId.onclick = () => window.scrollTo({top: 0})

If you want smooth scrolling

theId.onclick = () => window.scrollTo({ top: 0, behavior: `smooth` })

Use: LOGGER.log(Level.INFO, "Got an exception.", e);
or LOGGER.info("Got an exception. " + e.getMessage());

My experience shows that the -o option doesn't work properly and that the go-offline goal is far from sufficient to allow a full offline build:

The solution I could validate includes the use of the --legacy-local-repository maven option rather than the -o (offline) one and the use of the local repository in place of the distribution repository

In addition, I had to copy every maven-metadata-maven2_central.xml files of the local-repo into the maven-metadata.xml form expected by maven.

See the solution I found here.

To obtain the perspective-corrected co-ordinates, just divide by the z co-ordinate:

xc = x / z
yc = y / z

The above works assuming that the camera is at (0, 0, 0) and you are projecting onto the plane at z = 1 -- you need to translate the co-ords relative to the camera otherwise.

There are some complications for curves, insofar as projecting the points of a 3D Bezier curve will not in general give you the same points as drawing a 2D Bezier curve through the projected points.

No for-each loop, no extra jQuery plugin needed... Just call the below function.. Got from Difference between two dates in years

        function dateDiffInYears(dateold, datenew) {
            var ynew = datenew.getFullYear();
            var mnew = datenew.getMonth();
            var dnew = datenew.getDate();
            var yold = dateold.getFullYear();
            var mold = dateold.getMonth();
            var dold = dateold.getDate();
            var diff = ynew - yold;
            if (mold > mnew) diff--;
            else {
                if (mold == mnew) {
                    if (dold > dnew) diff--;
                }
            }
            return diff;
        }

This is an improved version of Anne's answer -- if you use perl, you can do the edit on the file 'in-place' rather than generating a new file:

perl -pi -e 's/\r\n|\n|\r/\r\n/g' file-to-convert  # Convert to DOS
perl -pi -e 's/\r\n|\n|\r/\n/g'   file-to-convert  # Convert to UNIX

You need to just replace ' with '' inside your string

SELECT colA, colB, colC
FROM tableD
WHERE colA = 'John''s Mobile'

You can also use REPLACE(@name, '''', '''''') if generating the SQL dynamically

If you want to escape inside a like statement then you need to use the ESCAPE syntax

It's also worth mentioning that you're leaving yourself open to SQL injection attacks if you don't consider it. More info at Google or: http://it.toolbox.com/wiki/index.php/How_do_I_escape_single_quotes_in_SQL_queries%3F

CSS

If this doesn't work:

.modal-backdrop {
   background-color: red;
}

try this:

.modal { 
   background-color: red !important; 
}

This got it working for me:

curl https://raw.githubusercontent.com/transcode-open/apt-cyg/master/apt-cyg > \
apt-cyg && install apt-cyg /bin

As other answers already say, Python can keep from releasing memory to the OS even if it's no longer in use by Python code (so gc.collect() doesn't free anything) especially in a long-running program. Anyway if you're on Linux you can try to release memory by invoking directly the libc function malloc_trim (man page). Something like:

import ctypes
libc = ctypes.CDLL("libc.so.6")
libc.malloc_trim(0)

before(default)

implementation fileTree(include: ['*.jar'], dir: 'libs')

just add '*.aar' in include array.

implementation fileTree(include: ['*.jar', '*.aar'], dir: 'libs')

it works well on Android Studio 3.x.

if you want ignore some library? do like this.

implementation fileTree(include: ['*.jar', '*.aar'], exclude: 'test_aar*', dir: 'libs')
debugImplementation files('libs/test_aar-debug.aar')
releaseImplementation files('libs/test_aar-release.aar')

For committing, I use the following strategies:

• commit as often as possible.

• Each feature change/bugfix should get its own commit (don't commit many files at once since that will make the history for that file unclear -- e.g. If I change a logging module and a GUI module independently and I commit both at once, both changes will be visible in both file histories. This makes reading a file history difficult),

• don't break the build on any commit -- it should be possible to retrieve any version of the repository and build it.

All files that are necessary for building and running the app should be in SVN. Test files and such should not, unless they are part of the unit tests.

There is a solution that requires no non-standard modules and is 100% transportable

import thread

def input_thread(a_list):
    raw_input()
    a_list.append(True)

def do_stuff():
    a_list = []
    thread.start_new_thread(input_thread, (a_list,))
    while not a_list:
        stuff()

Just in case you are running mac this can be also achieved by:

sudo dtruss mysqld 2>&1 | grep cnf

Try the following code:

    Configuration config = ConfigurationManager.OpenExeConfiguration(Application.ExecutablePath);
    config.AppSettings.Settings.Add("YourKey", "YourValue");
    config.Save(ConfigurationSaveMode.Minimal);

It worked for me :-)

If you install the IIS after the installation of .Net FrameWork. You need install the .net framework again for IIS. So all we need to do is run aspnet_regiis -i. Hope it is helpful.

As Aaron has already pointed out, you can set delete behaviour to CASCADE and that will delete children records when a parent record is deleted. Unless you want some sort of other magic to happen (in which case points 2, 3 of Aaron's reply would be useful), I don't see why would you need to delete with inner joins.

This should work :

The instructions says that you add a separate .htaccess containing the lines above to the wp-admin folder - and leave the main .htaccess, in the root, alone.

if that don't help , you can try this:

copy the .htaccess file as is from the wp-admin and placed it in the root folder and bingo! It should work ! if you face new error after this let us know.

for reference you can look here as well:

http://wordpress.org/support/topic/you-dont-have-permission-to-access-blogwp-loginphp-on-this-server

Check using this:

<IfModule mod_security.c>
SecFilterEngine Off
SecFilterScanPOST Off
</IfModule>

string t = DateTime.Now.ToString("h/m/s tt");
string t2 = DateTime.Now.ToString("hh:mm:ss tt");
string d = DateTime.Now.ToString("MM/dd/yy");

http://msdn.microsoft.com/en-us/library/8kb3ddd4.aspx

use

select 1/3.0

This will do the job.

I had to get clean table without columns. I have done folowing:

jMyTable.setModel(new DefaultTableModel());

I just had this problem myself under Debian Wheezy. I restarted the adb daemon with sudo:

sudo ./adb kill-server
sudo ./adb start-server
sudo ./adb devices

Everything is working :)

A save method to determine the width and height unit of any element (no padding, no margin) is the following:

let div   = document.querySelector("div");
let style = getComputedStyle(div);

let width  = parseFloat(style.width.replace("px", ""));
let height = parseFloat(style.height.replace("px", ""));

Okay, I found spencerlyon2's answer working. However, in case anybody would find himself/herself not knowing what to do with that one line, I had to do it this way:

beingsaved = plt.figure()

# Some scatter plots
plt.scatter(X_1_x, X_1_y)
plt.scatter(X_2_x, X_2_y)

beingsaved.savefig('destination_path.eps', format='eps', dpi=1000)

As suggested you need to use ng-options and unfortunately I believe you need to reference the array element for a default (unless the array is an array of strings).

http://jsfiddle.net/FxM3B/3/

The JavaScript:

function AppCtrl($scope) {


    $scope.operators = [
        {value: 'eq', displayName: 'equals'},
        {value: 'neq', displayName: 'not equal'}
     ]

    $scope.filterCondition={
        operator: $scope.operators[0]
    }
}

The HTML:

<body ng-app ng-controller="AppCtrl">
<div>Operator is: {{filterCondition.operator.value}}</div>
<select ng-model="filterCondition.operator" ng-options="operator.displayName for operator in operators">
</select>
</body>

I am a VIMer. I can do some rare Hex edits with:

• :%!xxd to switch into hex mode

• :%!xxd -r to exit from hex mode

But I strongly recommend ht

apt-cache show ht

Package: ht
Version: 2.0.18-1
Installed-Size: 1780
Maintainer: Alexander Reichle-Schmehl <[email protected]>

Homepage: http://hte.sourceforge.net/

Note: The package is called ht, whereas the executable is named hte after the package was installed.

1. Supported file formats
   • common object file format (COFF/XCOFF32)
   • executable and linkable format (ELF)
   • linear executables (LE)
   • standard DO$ executables (MZ)
   • new executables (NE)
   • portable executables (PE32/PE64)
   • java class files (CLASS)
   • Mach exe/link format (MachO)
   • X-Box executable (XBE)
   • Flat (FLT)
   • PowerPC executable format (PEF)
2. Code & Data Analyser
   • finds branch sources and destinations recursively
   • finds procedure entries
   • creates labels based on this information
   • creates xref information
   • allows to interactively analyse unexplored code
   • allows to create/rename/delete labels
   • allows to create/edit comments
   • supports x86, ia64, alpha, ppc and java code
3. Target systems
   • DJGPP
   • GNU/Linux
   • FreeBSD
   • OpenBSD
   • Win32

List of devices attached emulator-5584 host emulator-5580 host emulator-5576 host emulator-5572 host emulator-5568 host emulator-5564 host emulator-5560 host

C:\Users\Administrator>adb -s emulator-5584 emu kill error: could not connect to TCP port 5584: cannot connect to 127.0.0.1:5584: No connection could be made because the target machine actively refused it. (10061)

NOTE: gui of emulator is not running but still it's showing

SOLUTION:

adb kill-server

start emulator using:

emulator.exe -netdelay none -netspeed full -avd Nexus_5X_API_19

I hope this will help you!

I also got stucked with same problem so I fixed it like this :

If you are running mongo and nodejs in docker container or in docker compose

so replace localhost with mongo (which is container name in docker in my case) something like this below in your nodejs mongo connection file.

var mongoURI = "mongodb://mongo:27017/<nodejs_container_name>";

Their is a tool called indent. You can download it with apt-get install indent, then run indent my_program.c.

for root, dirs, files in os.walk(directory):
    for file in files:
        floc = file
        im = Image.open(str(directory) + '\\' + floc)
        pix = np.array(im.getdata())
        pixels.append(pix)
        labels.append(1)   # append(i)???

So far ok. But you want to leave pixels as a list until you are done with the iteration.

pixels = np.array(pixels)
labels = np.array(labels)

You had this indention right in your other question. What happened? previous

Iterating, collecting values in a list, and then at the end joining things into a bigger array is the right way. To make things clear I often prefer to use notation like:

alist = []
for ..
    alist.append(...)
arr = np.array(alist)

If names indicate something about the nature of the object I'm less likely to get errors like yours.

I don't understand what you are trying to do with traindata. I doubt if you need to build it during the loop. pixels and labels have the basic information.

That

traindata = np.array([traindata[i][i],traindata[1]], dtype=object)

comes from the previous question. I'm not sure you understand that answer.

traindata = []
traindata.append(pixels)
traindata.append(labels)

if done outside the loop is just

traindata = [pixels, labels]

labels is a 1d array, a bunch of 1s (or [0,1,2,3...] if my guess is right). pixels is a higher dimension array. What is its shape?

Stop right there. There's no point in turning that list into an array. You can save the list with pickle.

You are copying code from an earlier question, and getting the formatting wrong. cPickle very large amount of data

To start the process with parameters, you can use following code:

string filename = Path.Combine(cPath,"HHTCtrlp.exe");
var proc = System.Diagnostics.Process.Start(filename, cParams);

To kill/exit the program again, you can use following code:

proc.CloseMainWindow(); 
proc.Close();

I got the same error recently. I think McX is right it was caused by insufficient memory on RDP server. Here is the solution that works for us.

1. use sc cmd to get running services on the remote server. Make sure you can use windows explorer to access the remote server \\remote_server.

   sc \\<remote_server> query

2. find out the service you can stop.

   sc \\<remote_server> stop <service_name>

After stopping one service, the remote desktop works again.

If you use Vim, you can use the inbuilt diff functionality. vim -d file1 file2 takes you right into the diff screen, where you can do all sort of merge and deletes.

I don't think that you can change the directory in SQL*Plus.

Instead of changing directory, you can use @@filename, which reads in another script whose location is relative to the directory the current script is running in. For example, if you have two scripts

C:\Foo\Bar\script1.sql
C:\Foo\Bar\Baz\script2.sql

then script1.sql can run script2.sql if it contains the line

@@Baz\script2.sql

See this for more info about @@.

To correctly save the instance state of Fragment you should do the following:

1. In the fragment, save instance state by overriding onSaveInstanceState() and restore in onActivityCreated():

class MyFragment extends Fragment {

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        ...
        if (savedInstanceState != null) {
            //Restore the fragment's state here
        }
    }
    ...
    @Override
    public void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);

        //Save the fragment's state here
    }

}

2. And important point, in the activity, you have to save the fragment's instance in onSaveInstanceState() and restore in onCreate().

class MyActivity extends Activity {

    private MyFragment 

    public void onCreate(Bundle savedInstanceState) {
        ...
        if (savedInstanceState != null) {
            //Restore the fragment's instance
            mMyFragment = getSupportFragmentManager().getFragment(savedInstanceState, "myFragmentName");
            ...
        }
        ...
    }

    @Override
    protected void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);

        //Save the fragment's instance
        getSupportFragmentManager().putFragment(outState, "myFragmentName", mMyFragment);
    }

}

Hope this helps.

string exactPath = Path.GetFullPath(yourRelativePath);

works

I like Roy Osherove's naming strategy. It's the following:

[UnitOfWork_StateUnderTest_ExpectedBehavior]

It has every information needed on the method name and in a structured manner.

The unit of work can be as small as a single method, a class, or as large as multiple classes. It should represent all the things that are to be tested in this test case and are under control.

For assemblies, I use the typical .Tests ending, which I think is quite widespread and the same for classes (ending with Tests):

[NameOfTheClassUnderTestTests]

Previously, I used Fixture as suffix instead of Tests, but I think the latter is more common, then I changed the naming strategy.

One more solution that is built on top of w3org specification.
Original regex is taken from w3org.
The last "* Lazy quantifier" in this regex was replaced with "+ One or more quantifier".
Such a pattern fully complies with the specification, with one exception: it does not allow top level domain addresses such as "foo@com"

<input
    type="email" 
    pattern="[a-zA-Z0-9.!#$%&amp;’*+/=?^_`{|}~-]+@[a-zA-Z0-9-]+(?:\.[a-zA-Z0-9-]+)+"
    title="[email protected]"
    placeholder="[email protected]"
    required>

#$computerList = "Server Name"
#$regVar = "Name of the package "
#$packageName = "Packe name "
$computerList = $args[0]
$regVar = $args[1]
$packageName = $args[2]
foreach ($computer in $computerList)
{
    Write-Host "Connecting to $computer...."
    Invoke-Command -ComputerName $computer -Authentication Kerberos -ScriptBlock {
    param(
        $computer,
        $regVar,
        $packageName
        )

        Write-Host "Connected to $computer"
        if ([IntPtr]::Size -eq 4)
        {
            $registryLocation = Get-ChildItem "HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\"
            Write-Host "Connected to 32bit Architecture"
        }
        else
        {
            $registryLocation = Get-ChildItem "HKLM:\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\"
            Write-Host "Connected to 64bit Architecture"
        }
        Write-Host "Finding previous version of `enter code here`$regVar...."
        foreach ($registryItem in $registryLocation)
        {
            if((Get-itemproperty $registryItem.PSPath).DisplayName -match $regVar)
            {
                Write-Host "Found $regVar" (Get-itemproperty $registryItem.PSPath).DisplayName
                $UninstallString = (Get-itemproperty $registryItem.PSPath).UninstallString
                    $match = [RegEx]::Match($uninstallString, "{.*?}")
                    $args = "/x $($match.Value) /qb"
                    Write-Host "Uninstalling $regVar...."
                    [diagnostics.process]::start("msiexec", $args).WaitForExit() 
                    Write-Host "Uninstalled $regVar"
            }
        }

        $path = "\\$computer\Msi\$packageName"
        Write-Host "Installaing $path...."
        $args = " /i $path /qb"
        [diagnostics.process]::start("msiexec", $args).WaitForExit()
        Write-Host "Installed $path"
    } -ArgumentList $computer, $regVar, $packageName
Write-Host "Deployment Complete"

}

Try this for Windows:

    npm uninstall -g cordova

Try this for MAC:

    sudo npm uninstall -g cordova

You can also add Cordova like this:

1. If You Want To install the previous version of Cordova through the Node Package Manager (npm):

   npm install -g [email protected]
   

2. If You Want To install the latest version of Cordova:

   npm install -g cordova 
   

Enjoy!

Yes, you can use regular expressions in C#.

Using regular expressions with C#:

using System.Text.RegularExpressions;

string your_String = "Hello@Hello&Hello(Hello)";
string my_String =  Regex.Replace(your_String, @"[^0-9a-zA-Z]+", ",");

If I understand you correctly, You have two folders, one houses your php script that you want to include into a file that is in another folder?

If this is the case, you just have to follow the trail the right way. Let's assume your folders are set up like this:

root
    includes
        php_scripts
            script.php
    blog
        content
            index.php

If this is the proposed folder structure, and you are trying to include the "Script.php" file into your "index.php" folder, you need to include it this way:

include("../../../includes/php_scripts/script.php");

The way I do it is visual. I put my mouse pointer on the index.php (looking at the file structure), then every time I go UP a folder, I type another "../" Then you have to make sure you go UP the folder structure ABOVE the folders that you want to start going DOWN into. After that, it's just normal folder hierarchy.

The difference is quite simple:

OLTP (Online Transaction Processing)

OLTP is a class of information systems that facilitate and manage transaction-oriented applications. OLTP has also been used to refer to processing in which the system responds immediately to user requests. Online transaction processing applications are high throughput and insert or update-intensive in database management. Some examples of OLTP systems include order entry, retail sales, and financial transaction systems.

OLAP (Online Analytical Processing)

OLAP is part of the broader category of business intelligence, which also encompasses relational database, report writing and data mining. Typical applications of OLAP include business reporting for sales, marketing, management reporting, business process management (BPM), budgeting and forecasting, financial reporting and similar areas.

See more details OLTP and OLAP

Another scenario that you can get the [: too many arguments or [: a: binary operator expected errors is if you try to test for all arguments "$@"

if [ -z "$@" ]
then
    echo "Argument required."
fi

It works correctly if you call foo.sh or foo.sh arg1. But if you pass multiple args like foo.sh arg1 arg2, you will get errors. This is because it's being expanded to [ -z arg1 arg2 ], which is not a valid syntax.

The correct way to check for existence of arguments is [ "$#" -eq 0 ]. ($# is the number of arguments).

Elliot Beach is correct. Thanks Elliot.

Here is the code from my gist.

sudo apt-get remove docker docker-engine docker.io

sudo apt-get update

sudo apt-get install apt-transport-https ca-certificates curl software-properties-common

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

sudo apt-key fingerprint 0EBFCD88

sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
xenial \
stable"

sudo apt-get update

sudo apt-get install docker-ce

sudo docker run hello-world

Here are examples of listing files by pattern powered by Java 7 nio globbing and Java 8 lambdas:

    try (DirectoryStream<Path> dirStream = Files.newDirectoryStream(
            Paths.get(".."), "Test?/sample*.txt")) {
        dirStream.forEach(path -> System.out.println(path));
    }

or

    PathMatcher pathMatcher = FileSystems.getDefault()
        .getPathMatcher("regex:Test./sample\\w+\\.txt");
    try (DirectoryStream<Path> dirStream = Files.newDirectoryStream(
            new File("..").toPath(), pathMatcher::matches)) {
        dirStream.forEach(path -> System.out.println(path));
    }

To sum it all up, the correct answer is :

select * from db where Date >= '20100401'  (Format of date yyyymmdd)

This will avoid any problem with other language systems and will use the index.

For username password combos this is an easy issue to resolve. Chrome heuristics looks for the pattern:

<input type="text">

followed by:

<input type="password">

Simply break this process by invalidating this:

<input type="text">
<input type="text" onfocus="this.type='password'">

In Python 3 it's quite easy: read the file and rewrite it with utf-8 encoding:

s = open(bom_file, mode='r', encoding='utf-8-sig').read()
open(bom_file, mode='w', encoding='utf-8').write(s)

import subprocess,os,threading,time
from queue import Queue
lock=threading.Lock()
_start=time.time()
def check(n):
    with open(os.devnull, "wb") as limbo:
                ip="192.168.21.{0}".format(n)
                result=subprocess.Popen(["ping", "-n", "1", "-w", "300", ip],stdout=limbo, stderr=limbo).wait()
                with lock:                    
                    if not result:
                        print (ip, "active")                    
                    else:
                        pass                        

def threader():
    while True:
        worker=q.get()
        check(worker)
        q.task_done()
q=Queue()

for x in range(255):
    t=threading.Thread(target=threader)
    t.daemon=True
    t.start()
for worker in range(1,255):
    q.put(worker)
q.join()
print("Process completed in: ",time.time()-_start)

I think this will be better one.

$mail -> CharSet = "UTF-8";
$mail = new PHPMailer();

line $mail -> CharSet = "UTF-8"; must be after $mail = new PHPMailer(); and with no spaces!

try this

$mail = new PHPMailer();
$mail->CharSet = "UTF-8";

This one was taken from adminer sources:

/** Get a random string
* @return string 32 hexadecimal characters
*/
function rand_string() {
    return md5(uniqid(mt_rand(), true));
}

Adminer, database management tool written in PHP.

The way to check for null is to check for it:

DataRow[] myResultSet = myDataTable.Select("[COLUMN NAME] is null");

You can use and and or in the Select statement.

If it's been moved you can also (in IE 11, and I'm pretty sure this translates back to at least 10):

• Tools - Internet Options
• Under Browsing history click Settings
• Under Current location it shows the directory name

Note: The View files button will open a Windows Explorer window there.

For example, mine shows C:\BrowserCache\IE\Temporary Internet Files

I tried:

<input id="btnTest" type="button" value="button" />

<script type="text/javascript">
    $(document).ready( function() {
      $('#btnTest').click( function() {
        $.ajax({
          type: "POST", 
          url: "/Login/Test",
          data: { ListID: '1', ItemName: 'test' },
          dataType: "json",
          success: function(response) { alert(response); },
          error: function(xhr, ajaxOptions, thrownError) { alert(xhr.responseText); }
        });
      });
    });
</script>

and C#:

[HttpPost]
public ActionResult Test(string ListID, string ItemName)
{
    return Content(ListID + " " + ItemName);
}

It worked. Remove contentType and set data without double quotes.

Create an xml file in your drawable like this :

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item
        android:state_enabled="false"
        android:drawable="@drawable/btn_sendemail_disable" />
    <item
        android:state_pressed="true"
        android:state_enabled="true"
        android:drawable="@drawable/btn_send_email_click" />
    <item
        android:state_focused="true"
        android:state_enabled="true"
        android:drawable="@drawable/btn_sendemail_roll" />
    <item
        android:state_enabled="true"
        android:drawable="@drawable/btn_sendemail" />
</selector>

And set images accordingly and then set this xml as background of your imageButton.

In my case I had to wait for a user interaction, so I set a click or touchend listener.

const isMobile = navigator.maxTouchPoints || "ontouchstart" in document.documentElement;

function play(){
    audioEl.play()
}


document.body.addEventListener(isMobile ? "touchend" : "click", play, { once: true });

For selectively hiding Actionbar in activities:

Add the following code to onCreate (preferably on the last line of the function)

Kotlin:

supportActionBar?.hide()

Java:

getSupportActionBar().hide();

If you're using webservices, you'll also need the 'allow-http-request-headers-from' element. Here's our default, development, 'allow everything' policy.

<?xml version="1.0" ?>
<cross-domain-policy>
  <site-control permitted-cross-domain-policies="master-only"/>
  <allow-access-from domain="*"/>
  <allow-http-request-headers-from domain="*" headers="*"/>
</cross-domain-policy>

There is a lot of confusion around this, I will try to make it as simple as possible.

The primary key is a general concept to indicate one or more columns used to retrieve data from a Table.

The primary key may be SIMPLE and even declared inline:

 create table stackoverflow_simple (
      key text PRIMARY KEY,
      data text      
  );

That means that it is made by a single column.

But the primary key can also be COMPOSITE (aka COMPOUND), generated from more columns.

 create table stackoverflow_composite (
      key_part_one text,
      key_part_two int,
      data text,
      PRIMARY KEY(key_part_one, key_part_two)      
  );

In a situation of COMPOSITE primary key, the "first part" of the key is called PARTITION KEY (in this example key_part_one is the partition key) and the second part of the key is the CLUSTERING KEY (in this example key_part_two)

Please note that the both partition and clustering key can be made by more columns, here's how:

 create table stackoverflow_multiple (
      k_part_one text,
      k_part_two int,
      k_clust_one text,
      k_clust_two int,
      k_clust_three uuid,
      data text,
      PRIMARY KEY((k_part_one, k_part_two), k_clust_one, k_clust_two, k_clust_three)      
  );

Behind these names ...

• The Partition Key is responsible for data distribution across your nodes.
• The Clustering Key is responsible for data sorting within the partition.
• The Primary Key is equivalent to the Partition Key in a single-field-key table (i.e. Simple).
• The Composite/Compound Key is just any multiple-column key

Further usage information: DATASTAX DOCUMENTATION

insert into stackoverflow_simple (key, data) VALUES ('han', 'solo');
select * from stackoverflow_simple where key='han';

table content

key | data
----+------
han | solo

COMPOSITE/COMPOUND KEY can retrieve "wide rows" (i.e. you can query by just the partition key, even if you have clustering keys defined)

insert into stackoverflow_composite (key_part_one, key_part_two, data) VALUES ('ronaldo', 9, 'football player');
insert into stackoverflow_composite (key_part_one, key_part_two, data) VALUES ('ronaldo', 10, 'ex-football player');
select * from stackoverflow_composite where key_part_one = 'ronaldo';

table content

 key_part_one | key_part_two | data
--------------+--------------+--------------------
      ronaldo |            9 |    football player
      ronaldo |           10 | ex-football player

But you can query with all key (both partition and clustering) ...

select * from stackoverflow_composite 
   where key_part_one = 'ronaldo' and key_part_two  = 10;

query output

 key_part_one | key_part_two | data
--------------+--------------+--------------------
      ronaldo |           10 | ex-football player

Important note: the partition key is the minimum-specifier needed to perform a query using a where clause. If you have a composite partition key, like the following

eg: PRIMARY KEY((col1, col2), col10, col4))

You can perform query only by passing at least both col1 and col2, these are the 2 columns that define the partition key. The "general" rule to make query is you have to pass at least all partition key columns, then you can add optionally each clustering key in the order they're set.

so the valid queries are (excluding secondary indexes)

• col1 and col2
• col1 and col2 and col10
• col1 and col2 and col10 and col 4

Invalid:

• col1 and col2 and col4
• anything that does not contain both col1 and col2

Hope this helps.

Make the extensions you want one string i.e ".mp3.jpg.wma.wmf" and then check if each file contains the extension you want. This works with .net 2.0 as it does not use LINQ.

string myExtensions=".jpg.mp3";

string[] files=System.IO.Directory.GetFiles("C:\myfolder");

foreach(string file in files)
{
   if(myExtensions.ToLower().contains(System.IO.Path.GetExtension(s).ToLower()))
   {
      //this file has passed, do something with this file

   }
}

The advantage with this approach is you can add or remove extensions without editing the code i.e to add png images, just write myExtensions=".jpg.mp3.png".

From the documentation for strtotime():

Dates in the m/d/y or d-m-y formats are disambiguated by looking at the separator between the various components: if the separator is a slash (/), then the American m/d/y is assumed; whereas if the separator is a dash (-) or a dot (.), then the European d-m-y format is assumed.

In your date string, you have 12-16-2013. 16 isn't a valid month, and hence strtotime() returns false.

Since you can't use DateTime class, you could manually replace the - with / using str_replace() to convert the date string into a format that strtotime() understands:

$date = '2-16-2013';
echo date('Y-m-d', strtotime(str_replace('-','/', $date))); // => 2013-02-16

If you give a default value to each primary constructor parameter:

data class Item(var id: String = "",
            var title: String = "",
            var condition: String = "",
            var price: String = "",
            var categoryId: String = "",
            var make: String = "",
            var model: String = "",
            var year: String = "",
            var bodyStyle: String = "",
            var detail: String = "",
            var latitude: Double = 0.0,
            var longitude: Double = 0.0,
            var listImages: List<String> = emptyList(),
            var idSeller: String = "")

and from the class where the instances you can call it without arguments or with the arguments that you have that moment

var newItem = Item()

var newItem2 = Item(title = "exampleTitle",
            condition = "exampleCondition",
            price = "examplePrice",
            categoryId = "exampleCategoryId")

Such { get; set; } syntax is called automatic properties, C# 3.0 syntax

You must use Visual C# 2008 / csc v3.5 or above to compile. But you can compile output that targets as low as .NET Framework 2.0 (no runtime or classes required to support this feature).

FileZilla does not have any command line arguments (nor any other way) that allow an automatic transfer.

Some references:

• FileZilla Client command-line arguments
• https://trac.filezilla-project.org/ticket/2317
• How do I send a file with FileZilla from the command line?

Though you can use any other client that allows automation.

You have not specified, what protocol you are using. FTP or SFTP? You will definitely be able to use WinSCP, as it supports all protocols that FileZilla does (and more).

Combine WinSCP scripting capabilities with Windows Scheduler:

• Automate file transfers to FTP server or SFTP server;
• Schedule file transfers to FTP/SFTP server

A typical WinSCP script for upload (with SFTP) looks like:

open sftp://user:[email protected]/ -hostkey="ssh-rsa 2048 xxxxxxxxxxx...="
put c:\mypdfs\*.pdf /home/user/
close

With FTP, just replace the sftp:// with the ftp:// and remove the -hostkey="..." switch.

Similarly for download: How to schedule an automatic FTP download on Windows?

WinSCP can even generate a script from an imported FileZilla session.

For details, see the guide to FileZilla automation.

(I'm the author of WinSCP)

Another option, if you are using SFTP, is the psftp.exe client from PuTTY suite.

Try putting this HTML snippet into your served document:

<img id="ItemPreview" src="">

Then, on JavaScript side, you can dynamically modify image's src attribute with so-called Data URL.

document.getElementById("ItemPreview").src = "data:image/png;base64," + yourByteArrayAsBase64;

Alternatively, using jQuery:

$('#ItemPreview').attr('src', `data:image/png;base64,${yourByteArrayAsBase64}`);

This assumes that your image is stored in PNG format, which is quite popular. If you use some other image format (e.g. JPEG), modify the MIME type ("image/..." part) in the URL accordingly.

Similar Questions:

• Displaying a byte array as an image using JavaScript

• Display bytes as images on an .aspx page

• 'data:image/jpg;base64' and jQuery image preview in Internet Explorer

• Convert from binary data to an image control in ASP.NET

• How to convert a byte array into an image?

git push -f maybe?

man git-push will tell more.

I had a lot of problems making a virtual environment (venv) as described in the tensorflow installation guide.

Most of the commands listed in this post didn't help me either so, if this is also your case this is what I did:

1. pip3 install --user pipenv
2. pip install virtualenv

Installs the dependencies to create a virtual environment

3. mkdir myenv

Makes a new directory called myenv but you can call it whatever you want e.g. mynewenv

4. cd myenv

Or whatever you call your directory so: cd [your_directory_name]

5. virtualenv -p /usr/bin/python3 venv

Creates a virtual environment called venv in the folder myenv. You can call your virtual env whatever you like e.g. vitualenv [v_env_name]

6. source ./venv/bin/activate

Activates the virtual environment. Note that if you choose a different v. env. name your commands should be written as such source ./[v_env_name]/bin/activate

7. deactivate

Deactivates the virtual environment.

Note: I am using Python 3.6.6 & Ubuntu 18.04

source for the commands

  $objPHPExcel->getActiveSheet()->getStyle('B3:B7')->getFill()
->setFillType(PHPExcel_Style_Fill::FILL_SOLID)
->getStartColor()->setARGB('FFFF0000');

It's in the documentation, located here: https://github.com/PHPOffice/PHPExcel/wiki/User-Documentation-Overview-and-Quickstart-Guide

99% of the time, you should not have to worry about either. :) But, if your objects hold references to non-managed resources (window handles, file handles, for example), you need to provide a way for your managed object to release those resources. Finalize gives implicit control over releasing resources. It is called by the garbage collector. Dispose is a way to give explicit control over a release of resources and can be called directly.

There is much much more to learn about the subject of Garbage Collection, but that's a start.

How to print unicode characters into a file:

Save this to file: foo.py:

#!/usr/bin/python -tt
# -*- coding: utf-8 -*-
import codecs
import sys 
UTF8Writer = codecs.getwriter('utf8')
sys.stdout = UTF8Writer(sys.stdout)
print(u'e with obfuscation: é')

Run it and pipe output to file:

python foo.py > tmp.txt

Open tmp.txt and look inside, you see this:

el@apollo:~$ cat tmp.txt 
e with obfuscation: é

Thus you have saved unicode e with a obfuscation mark on it to a file.

How about onblur event :

<input type="text" name="name" value="value" onblur="alert(1);"/>

Just you need to use 

//for bold
android:textStyle="bold"

//for italic
android:textStyle="italic"

//for normal
android:textStyle="normal"

<TextView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:textStyle="bold"
    android:text="@string/userName"
    android:layout_gravity="left"
    android:textSize="16sp"
/>

While some of the above solutions work, I thought I'd post our eventual solution - which defines a 'ready' method that will fire as soon as FB is initialized and ready to go. It has the advantage over other solutions that it's safe to call either before or after FB is ready.

It can be used like so:

f52.fb.ready(function() {
    // safe to use FB here
});

Here's the source file (note that it's defined within a 'f52.fb' namespace).

if (typeof(f52) === 'undefined') { f52 = {}; }
f52.fb = (function () {

    var fbAppId = f52.inputs.base.fbAppId,
        fbApiInit = false;

    var awaitingReady = [];

    var notifyQ = function() {
        var i = 0,
            l = awaitingReady.length;
        for(i = 0; i < l; i++) {
            awaitingReady[i]();
        }
    };

    var ready = function(cb) {
        if (fbApiInit) {
            cb();
        } else {
            awaitingReady.push(cb);
        }
    };

    window.fbAsyncInit = function() {
        FB.init({
            appId: fbAppId,
            xfbml: true,
            version: 'v2.0'
        });

        FB.getLoginStatus(function(response){
            fbApiInit = true;
            notifyQ();
        });
    };

    return {
        /**
         * Fires callback when FB is initialized and ready for api calls.
         */
        'ready': ready
    };

})();

*args just means that the function takes a number of arguments, generally of the same type.

Check out this section in the Python tutorial for more info.

in your server side the code looks like:

var request = require('request');

app.post('/add', function(req, res){
  console.log(req.body);
  request.post(
    {
    url:'http://localhost:6001/add',
    json: {
      unit_name:req.body.unit_name,
      unit_price:req.body.unit_price
        },
    headers: {
        'Content-Type': 'application/json'
    }
    },
  function(error, response, body){
    // console.log(error);
    // console.log(response);
    console.log(body);
    res.send(body);
  });
  // res.send("body");
});

in receiving end server code looks like:

app.post('/add', function(req, res){
console.log('received request')
console.log(req.body);
let adunit = new AdUnit(req.body);
adunit.save()
.then(game => {
res.status(200).json({'adUnit':'AdUnit is added successfully'})
})
.catch(err => {
res.status(400).send('unable to save to database');
})
});

Schema is just two properties unit_name and unit_price.

setDate() has issues with month boundaries that are noted in comments above. A clean workaround is to find the date difference using epoch timestamps rather than the (surprisingly counterintuitive) methods on the Date object. I.e.

function getPreviousMonday(fromDate) {
    var dayMillisecs = 24 * 60 * 60 * 1000;

    // Get Date object truncated to date.
    var d = new Date(new Date(fromDate || Date()).toISOString().slice(0, 10));

    // If today is Sunday (day 0) subtract an extra 7 days.
    var dayDiff = d.getDay() === 0 ? 7 : 0;

    // Get date diff in millisecs to avoid setDate() bugs with month boundaries.
    var mondayMillisecs = d.getTime() - (d.getDay() + dayDiff) * dayMillisecs;

    // Return date as YYYY-MM-DD string.
    return new Date(mondayMillisecs).toISOString().slice(0, 10);
}

I did manage to finally display a window on the lock screen with the use of TYPE_SYSTEM_OVERLAY instead of TYPE_KEYGUARD_DIALOG. This works as expected and adds the window on the lock screen.

The problem with this is that the window is added on top of everything it possibly can. That is, the window will even appear on top of your keypad/pattern lock in case of secure lock screens. In the case of an unsecured lock screen, it will appear on top of the notification tray if you open it from the lock screen.

For me, that is unacceptable. I hope that this may help anybody else facing this problem.

Blowfish isn't better than MD5 or SHA512, as they serve different purposes. MD5 and SHA512 are hashing algorithms, Blowfish is an encryption algorithm. Two entirely different cryptographic functions.

You could also use something like the following after you have it converted to an array using one of the of methods listed by others:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Net;
using System.Configuration;

namespace ConsoleApplication
{
    class Program
    {
        static void Main(string[] args)
        {
            CommaDelimitedStringCollection commaStr = new CommaDelimitedStringCollection();
            string[] itemList = { "Test1", "Test2", "Test3" };
            commaStr.AddRange(itemList);
            Console.WriteLine(commaStr.ToString()); //Outputs Test1,Test2,Test3
            Console.ReadLine();
        }
    }
}

Edit: Here is another example

The reason is that the data doesn't match the datatype. I have come across the same issues that I forgot to make the fields match. Though my case is not same as yours, but it shows the similar error message.

The situation is that I copy a table, but accidently I misspell one field, so I change it using the ALTER after creating the database. And the order of fields in both table is not identical. so when I use the INSERT INTO TableName SELECT * FROM TableName, the result showed the similar errors: Operand type clash: datetime is incompatible with uniqueidentifier

This is a simiple example:

use example
go
create table Test1 (
    id int primary key,
    item uniqueidentifier,
    inserted_at datetime
    )
go
create table Test2 (
    id int primary key,
    inserted_at datetime
    )
go
alter table Test2 add item uniqueidentifier;
go

--insert into Test1 (id, item, inserted_at) values (1, newid(), getdate()), (2, newid(), getdate());


insert into Test2 select * from Test1;

select * from Test1;
select * from Test2;

The error message is:

Msg 206, Level 16, State 2, Line 24
Operand type clash: uniqueidentifier is incompatible with datetime

I prefer going the long route. These are the checks I follow to avoid using a try-except clause -

1. check if variable is not None
2. then check if its a dataframe and
3. make sure its not empty

Here, DATA is the suspect variable -

DATA is not None and isinstance(DATA, pd.DataFrame) and not DATA.empty

One option is to use do.call():

 > do.call(rbind, a)
      [,1] [,2] [,3] [,4] [,5] [,6]
 [1,]    1    1    2    3    4    5
 [2,]    2    1    2    3    4    5
 [3,]    3    1    2    3    4    5
 [4,]    4    1    2    3    4    5
 [5,]    5    1    2    3    4    5
 [6,]    6    1    2    3    4    5
 [7,]    7    1    2    3    4    5
 [8,]    8    1    2    3    4    5
 [9,]    9    1    2    3    4    5
[10,]   10    1    2    3    4    5

Javac – compiler that converts source code to byte code. JVM- interpreter that converts byte code to machine language code.

As we know java is both compile**r & **interpreter based language. Once the java code also known as source code is compiled, it gets converted to native code known as BYTE CODE which is portable & can be easily executed on all operating systems. Byte code generated is basically represented in hexa decimal format. This format is same on every platform be it Solaris work station or Macintosh, windows or Linux. After compilation, the interpreter reads the generated byte code & translates it according to the host machine. . Byte code is interpreted by Java Virtual Machine which is available with all the operating systems we install. so to port Java programs to a new platform all that is required is to port the interpreter and some of the library routines.

Hope it helps!!!

usually, i would expect this as a 'cascading delete' enforced in a trigger, you would only need to delete the main record, then all the depepndent records would be deleted by the trigger logic.

this logic would be similar to what you have written.

<foo name="port">
   <value>${my.server.port:8088}</value>
</foo>

should work for you to have 8088 as default port

See also: http://blog.callistaenterprise.se/2011/11/17/configure-your-spring-web-application/

Pay attention, there is a bug with Jquery 1.8.0, $(window).height() returns the all document height !

Apple provides detailed, illustrated instructions covering every step of the process. Log in to the iPhone developer site and click the "program portal" link. In the program portal you'll find a link to the program portal user's guide, which is a really good reference and guide on this topic.

If you have complex routing needs and want a built-in GUI to monitor the broker, then RabbitMQ might be best for your application. Otherwise, if you’re looking for a message broker to handle high throughput and provide access to stream history, Kafka is the likely the better choice.

You can use the jQuery Color plugin.

For example, to draw attention to all the divs on your page, you could use the following code:

$("div").stop().css("background-color", "#FFFF9C")
    .animate({ backgroundColor: "#FFFFFF"}, 1500);

Edit - New and improved

The following uses the same technique as above, but it has the added benefits of:

• parameterized highlight color and duration
• retaining original background color, instead of assuming that it is white
• being an extension of jQuery, so you can use it on any object

Extend the jQuery Object:

var notLocked = true;
$.fn.animateHighlight = function(highlightColor, duration) {
    var highlightBg = highlightColor || "#FFFF9C";
    var animateMs = duration || 1500;
    var originalBg = this.css("backgroundColor");
    if (notLocked) {
        notLocked = false;
        this.stop().css("background-color", highlightBg)
            .animate({backgroundColor: originalBg}, animateMs);
        setTimeout( function() { notLocked = true; }, animateMs);
    }
};

Usage example:

$("div").animateHighlight("#dd0000", 1000);

Typical error on Windows because the default user directory is C:\user\<your_user>, so when you want to use this path as an string parameter into a Python function, you get a Unicode error, just because the \u is a Unicode escape. Any character not numeric after this produces an error.

To solve it, just double the backslashes: C:\\user\\<\your_user>...

I finally solved this by creating a second object that imitates B.

My schema now looks like this:

I now have B1 (within parent of A) and B2 outside of it.

B1 and B2 are right next to one another, so to the naked eye it looks as if it's just 1 object.

I had this error aswell.

I am working in mysql workbench. When giving the values they have to be inside "". That solved it for me.

Forgot to relate to the first code snippet. I wouldn't use forEach at all. Since you are collecting the elements of the Stream into a List, it would make more sense to end the Stream processing with collect. Then you would need peek in order to set the ID.

List<Entry> updatedEntries = 
    entryList.stream()
             .peek(e -> e.setTempId(tempId))
             .collect (Collectors.toList());

For the second snippet, forEach can execute multiple expressions, just like any lambda expression can :

entryList.forEach(entry -> {
  if(entry.getA() == null){
    printA();
  }
  if(entry.getB() == null){
    printB();
  }
  if(entry.getC() == null){
    printC();
  }
});

However (looking at your commented attempt), you can't use filter in this scenario, since you will only process some of the entries (for example, the entries for which entry.getA() == null) if you do.

Just came across this new tool in hacker news.

From their page - "Nuitka is a good replacement for the Python interpreter and compiles every construct that CPython 2.6, 2.7, 3.2 and 3.3 offer. It translates the Python into a C++ program that then uses "libpython" to execute in the same way as CPython does, in a very compatible way."

You can use regular expressions like this:

SELECT * FROM pet WHERE name REGEXP 'Bob|Smith'; 

That's not really a question of aesthetics, but indeed a technical difference. The directory thinking of it is totally correct and pretty much explaining everything. Let's work it out:

You are back in the stone age now or only serve static pages

You have a fixed directory structure on your web server and only static files like images, html and so on — no server side scripts or whatsoever.

A browser requests /index.htm, it exists and is delivered to the client. Later you have lots of - let's say - DVD movies reviewed and a html page for each of them in the /dvd/ directory. Now someone requests /dvd/adams_apples.htm and it is delivered because it is there.

At some day, someone just requests /dvd/ - which is a directory and the server is trying to figure out what to deliver. Besides access restrictions and so on there are two possibilities: Show the user the directory content (I bet you already have seen this somewhere) or show a default file (in Apache it is: DirectoryIndex: sets the file that Apache will serve if a directory is requested.)

So far so good, this is the expected case. It already shows the difference in handling, so let's get into it:

At 5:34am you made a mistake uploading your files

(Which is by the way completely understandable.) So, you did something entirely wrong and instead of uploading /dvd/the_big_lebowski.htm you uploaded that file as dvd (with no extension) to /.

Someone bookmarked your /dvd/ directory listing (of course you didn't want to create and always update that nifty index.htm) and is visiting your web-site. Directory content is delivered - all fine.

Someone heard of your list and is typing /dvd. And now it is screwed. Instead of your DVD directory listing the server finds a file with that name and is delivering your Big Lebowski file.

So, you delete that file and tell the guy to reload the page. Your server looks for the /dvd file, but it is gone. Most servers will then notice that there is a directory with that name and tell the client that what it was looking for is indeed somewhere else. The response will most likely be be:

Status Code:301 Moved Permanently with Location: http://[...]/dvd/

So, totally ignoring what you think about directories or files, the server only can handle such stuff and - unless told differently - decides for you about the meaning of "slash or not".

Finally after receiving this response, the client loads /dvd/ and everything is fine.

Is it fine? No.

"Just fine" is not good enough for you

You have some dynamic page where everything is passed to /index.php and gets processed. Everything worked quite good until now, but that entire thing starts to feel slower and you investigate.

Soon, you'll notice that /dvd/list is doing exactly the same: Redirecting to /dvd/list/ which is then internally translated into index.php?controller=dvd&action=list. One additional request - but even worse! customer/login redirects to customer/login/ which in turn redirects to the HTTPS URL of customer/login/. You end up having tons of unnecessary HTTP redirects (= additional requests) that make the user experience slower.

Most likely you have a default directory index here, too: index.php?controller=dvd with no action simply internally loads index.php?controller=dvd&action=list.

Summary:

• If it ends with / it can never be a file. No server guessing.

• Slash or no slash are entirely different meanings. There is a technical/resource difference between "slash or no slash", and you should be aware of it and use it accordingly. Just because the server most likely loads /dvd/index.htm - or loads the correct script stuff - when you say /dvd: It does it, but not because you made the right request. Which would have been /dvd/.

• Omitting the slash even if you indeed mean the slashed version gives you an additional HTTP request penalty. Which is always bad (think of mobile latency) and has more weight than a "pretty URL" - especially since crawlers are not as dumb as SEOs believe or want you to believe ;)

if you are using rvm tool you can run this command to print gem path:

rvm gemdir

OR

echo $GEM_HOME

In general, if you are using white-space: nowrap; it is probably because you know which columns are going to contain content which wraps (or stretches the cell). For those columns, I generally wrap the cell's contents in a span with a specific class attribute and apply a specific width.

Example:

HTML:

<td><span class="description">My really long description</span></td>

CSS:

span.description {
    display: inline-block;
    overflow: hidden;
    white-space: nowrap;
    width: 150px;
}

This is the query I normally use,

select s.sid
      ,s.serial#
      ,s.username
      ,s.machine
      ,s.status
      ,s.lockwait
      ,t.used_ublk
      ,t.used_urec
      ,t.start_time
from v$transaction t
inner join v$session s on t.addr = s.taddr;

This is a security and maintainability question.

safe methods

Whenever possible, you should use 'safe' (unidirectional) methods such as GET and HEAD in order to limit potential vulnerability.

idempotent methods

Whenever possible, you should use 'idempotent' methods such as GET, HEAD, PUT and DELETE, which can't have side effects and are therefore less error prone/easier to control.

Source

Implode will combine an array into a string for you, but to make an SQL query out a kay/value pair you'll have to write your own function.

Now the following wont help you with files that are already cached, but moving forward, you can use the following to easily force a request to get something new, without changing the actual filename.

# Rewrite all requests for JS and CSS files to files of the same name, without
# any numbers in them. This lets the JS and CSS be force out of cache easily
# by putting a number at the end of the filename
# e.g. a request for static/js/site-52.js will get the file static/js/site.js instead.
<IfModule mod_rewrite.c>
  RewriteEngine on
  RewriteRule ^static/(js|css)/([a-z]+)-([0-9]+)\.(js|css)$ /site/$1/$2.$4 [R=302,NC,L]
</IfModule>

Of course, the higher up in your folder structure you do this type of approach, the more you kick things out of cache with a simple change.

So for example, if you store the entire css and javascript of your site in one main folder

/assets/js
/assets/css
/assets/...

Then you can could start referencing it as "assets-XXX" in your html, and use a rule like so to kick all assets content out of cache.

<IfModule mod_rewrite.c>
  RewriteEngine on
  RewriteRule ^assets-([a-z0-9]+)/(.*) /$2 [R=302,NC,L]
</IfModule> 

Note that if you do go with this, after you have it working, change the 302 to a 301, and then caching will kick in. When it's a 302 it wont cache at the browser level because it's a temporary redirect. If you do it this way, then you could bump up the expiry default time to 30 days for all assets, since you can easily kick things out of cache by simply changing the folder name in the login page.

<IfModule mod_expires.c>
  ExpiresActive on
  ExpiresDefault A2592000
</IfModule>

list.insert with any index >= len(of_the_list) places the value at the end of list. It behaves like append

Python 3.7.4
>>>lst=[10,20,30]
>>>lst.insert(len(lst), 101)
>>>lst
[10, 20, 30, 101]
>>>lst.insert(len(lst)+50, 202)
>>>lst
[10, 20, 30, 101, 202]

Time complexity, append O(1), insert O(n)

Your question is vague but you could use ShowDialog to display form 2. Then when you close form 2, pass a DialogResult object back to let the user know how the form was closed - if the user clicked the button, then close form 1 as well.

To delete a cookie with JQuery, set the value to null:

$.cookie("name", null, { path: '/' });

Edit: The final solution was to explicitly specify the path property whenever accessing the cookie, because the OP accesses the cookie from multiple pages in different directories, and thus the default paths were different (this was not described in the original question). The solution was discovered in discussion below, which explains why this answer was accepted - despite not being correct.

For some versions jQ cookie the solution above will set the cookie to string null. Thus not removing the cookie. Use the code as suggested below instead.

$.removeCookie('the_cookie', { path: '/' });

You can create a boolean field and check it inside run:

public class Task implements Runnable {

   private volatile boolean isRunning = true;

   public void run() {

     while (isRunning) {
         //do work
     }
   }

   public void kill() {
       isRunning = false;
   }

}

To stop it just call

task.kill();

This should work.

Do the following:

Dim dataTable1 As New DataTable
                dataTable1.Columns.Add("FECHA")
                dataTable1.Columns.Add("TT")
                dataTable1.Columns.Add("DESCRIPCION")
                dataTable1.Columns.Add("No. DOC")
                dataTable1.Columns.Add("DEBE")
                dataTable1.Columns.Add("HABER")
                dataTable1.Columns.Add("SALDO")

For Each line As String In System.IO.File.ReadAllLines(objetos.url)
                    dataTable1.Rows.Add(line.Split(","))
                Next

It's available many, many places, depending upon what is installed: On my box, every one except the v6.0A SDK version supports the /fd option.

Iterables.getLast from Google Guava. It has some optimization for Lists and SortedSets too.

Is it possible to list all of the possible goals (including, say, all the plugins) that it is possible to run?

Maven doesn't have anything built-in for that, although the list of phases is finite (the list of plugin goals isn't since the list of plugins isn't).

But you can make things easier and leverage the power of bash completion (using cygwin if you're under Windows) as described in the Guide to Maven 2.x auto completion using BASH (but before to choose the script from this guide, read further).

To get things working, first follow this guide to setup bash completion on your computer. Then, it's time to get a script for Maven2 and:

• While you could use the one from the mini guide
• While you use an improved version attached to MNG-3928
• While you could use a random scripts found around the net (see the resources if you're curious)
• I personally use the Bash Completion script from Ludovic Claude's PPA (which is bundled into the packaged version of maven in Ubuntu) that you can download from the HEAD. It's simply the best one.

Below, here is what I get just to illustrate the result:

$ mvn [tab][tab]
Display all 377 possibilities? (y or n)
ant:ant 
ant:clean 
ant:help 
antrun:help 
antrun:run 
archetype:crawl 
archetype:create 
archetype:create-from-project 
archetype:generate 
archetype:help 
assembly:assembly 
assembly:directory 
assembly:directory-single 
assembly:help 
assembly:single  
... 

Of course, I never browse the 377 possibilities, I use completion. But this gives you an idea about the size of "a" list :)

Resources

• Guide to Maven 2.x auto completion using BASH
• Fixing Maven 2.x BASH auto completion on CYGWIN
• Maven bash completion
• maven2 bash completion complete
• Maven Tab Auto Completion in Bash
• Advanced Bash completion script for Maven 2

You can declare multiple variables, and initialize multiple variables, but not both at the same time:

 String one,two,three;
 one = two = three = "";

However, this kind of thing (especially the multiple assignments) would be frowned upon by most Java developers, who would consider it the opposite of "visually simple".

If you have a content Uri with content://com.externalstorage... you can use this method to get absolute path of a folder or file on Android 19 or above.

public static String getPath(final Context context, final Uri uri) {
    final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;

    // DocumentProvider
    if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {
        System.out.println("getPath() uri: " + uri.toString());
        System.out.println("getPath() uri authority: " + uri.getAuthority());
        System.out.println("getPath() uri path: " + uri.getPath());

        // ExternalStorageProvider
        if ("com.android.externalstorage.documents".equals(uri.getAuthority())) {
            final String docId = DocumentsContract.getDocumentId(uri);
            final String[] split = docId.split(":");
            final String type = split[0];
            System.out.println("getPath() docId: " + docId + ", split: " + split.length + ", type: " + type);

            // This is for checking Main Memory
            if ("primary".equalsIgnoreCase(type)) {
                if (split.length > 1) {
                    return Environment.getExternalStorageDirectory() + "/" + split[1] + "/";
                } else {
                    return Environment.getExternalStorageDirectory() + "/";
                }
                // This is for checking SD Card
            } else {
                return "storage" + "/" + docId.replace(":", "/");
            }

        }
    }
    return null;
}

You can check each part of Uri using println. Returned values for my SD card and device main memory are listed below. You can access and delete if file is on memory, but I wasn't able to delete file from SD card using this method, only read or opened image using this absolute path. If you find a solution to delete using this method, please share.

SD CARD

getPath() uri: content://com.android.externalstorage.documents/tree/612E-B7BF%3A/document/612E-B7BF%3A
getPath() uri authority: com.android.externalstorage.documents
getPath() uri path: /tree/612E-B7BF:/document/612E-B7BF:
getPath() docId: 612E-B7BF:, split: 1, type: 612E-B7BF

MAIN MEMORY

getPath() uri: content://com.android.externalstorage.documents/tree/primary%3A/document/primary%3A
getPath() uri authority: com.android.externalstorage.documents
getPath() uri path: /tree/primary:/document/primary:
getPath() docId: primary:, split: 1, type: primary

If you wish to get Uri with file:/// after getting path use

DocumentFile documentFile = DocumentFile.fromFile(new File(path));
documentFile.getUri() // will return a Uri with file Uri