C++ programs are translated to assembly programs during the generation of machine code from the source code. It would be virtually wrong to say assembly is slower than C++. Moreover, the binary code generated differs from compiler to compiler. So a smart C++ compiler may produce binary code more optimal and efficient than a dumb assembler's code.
However I believe your profiling methodology has certain flaws. The following are general guidelines for profiling:
For TypeScript users:
toggle(event: Event): void {
let elementId: string = (event.target as Element).id;
// do something with the id...
}
You have a numpy array of strings, not floats. This is what is meant by dtype('<U9')
-- a little endian encoded unicode string with up to 9 characters.
try:
return sum(np.asarray(listOfEmb, dtype=float)) / float(len(listOfEmb))
However, you don't need numpy here at all. You can really just do:
return sum(float(embedding) for embedding in listOfEmb) / len(listOfEmb)
Or if you're really set on using numpy.
return np.asarray(listOfEmb, dtype=float).mean()
What's happening is the onClick function you are trying to implement gets executed immediately.
As our code is not HTML it is javascript so it is interpreted as a function execution.
onClick function takes a function as argument not an function execution.
const items = ['EN', 'IT', 'FR', 'GR', 'RU'].map((item) => {
return (<li onClick={(e) => onItemClick(e, item)} key={item}>{item}</li>);
});
this will define an onClick function on List Item that will get executed after clicking on it not as soon as our component renders.
In order to uninstall miniconda, simply remove the miniconda
folder,
rm -r ~/miniconda/
As for avoiding conflicts between different Python environments, you can use virtual environments. In particular, with Miniconda, the following workflow could be used,
$ wget https://repo.continuum.io/miniconda/Miniconda3-3.7.0-Linux-x86_64.sh -O ~/miniconda.sh
$ bash miniconda
$ conda env remove --yes -n new_env # remove the environement new_env if it exists (optional)
$ conda create --yes -n new_env pip numpy pandas scipy matplotlib scikit-learn nltk ipython-notebook seaborn python=2
$ activate new_env
$ # pip install modules if needed, run python scripts, etc
# everything will be installed in the new_env
# located in ~/miniconda/envs/new_env
$ deactivate
In my machine which is ubuntu 14.04 with python 2.7 installed, if I go here,
/usr/local/lib/python2.7/dist-packages/nltk/
there is a file called
VERSION
.
If I do a cat VERSION
it prints 3.1
, which is the NLTK version installed.
Add the following to the top of your file # coding=utf-8
If you go to the link in the error you can seen the reason why:
Defining the Encoding
Python will default to ASCII as standard encoding if no other encoding hints are given. To define a source code encoding, a magic comment must be placed into the source files either as first or second line in the file, such as: # coding=
I tried from ubuntu terminal and I don't know why the GUI didn't show up according to tttthomasssss answer. So I followed the comment from KLDavenport and it worked. Here is the summary:
Open your terminal/command-line and type python then
>>> import nltk
.>>> nltk.download("stopwords")
This will store the stopwords corpus under the nltk_data. For my case it was /home/myusername/nltk_data/corpora/stopwords
.
If you need another corpus then visit nltk data and find the corpus with their ID. Then use the ID to download like we did for stopwords.
Just make sure you are using Jupyter
Notebook and in a notebook, do the following:
import nltk
nltk.download()
Then one popup window will appear (showing info https://raw.githubusercontent.com/nltk/nltk_data/gh-pages/index.xml) From that you have to download everything.
Then rerun your code.
To download a particular dataset/models, use the nltk.download()
function, e.g. if you are looking to download the punkt
sentence tokenizer, use:
$ python3
>>> import nltk
>>> nltk.download('punkt')
If you're unsure of which data/model you need, you can start out with the basic list of data + models with:
>>> import nltk
>>> nltk.download('popular')
It will download a list of "popular" resources, these includes:
<collection id="popular" name="Popular packages">
<item ref="cmudict" />
<item ref="gazetteers" />
<item ref="genesis" />
<item ref="gutenberg" />
<item ref="inaugural" />
<item ref="movie_reviews" />
<item ref="names" />
<item ref="shakespeare" />
<item ref="stopwords" />
<item ref="treebank" />
<item ref="twitter_samples" />
<item ref="omw" />
<item ref="wordnet" />
<item ref="wordnet_ic" />
<item ref="words" />
<item ref="maxent_ne_chunker" />
<item ref="punkt" />
<item ref="snowball_data" />
<item ref="averaged_perceptron_tagger" />
</collection>
In case anyone is avoiding errors from downloading larger datasets from nltk
, from https://stackoverflow.com/a/38135306/610569
$ rm /Users/<your_username>/nltk_data/corpora/panlex_lite.zip
$ rm -r /Users/<your_username>/nltk_data/corpora/panlex_lite
$ python
>>> import nltk
>>> dler = nltk.downloader.Downloader()
>>> dler._update_index()
>>> dler._status_cache['panlex_lite'] = 'installed' # Trick the index to treat panlex_lite as it's already installed.
>>> dler.download('popular')
From v3.2.5, NLTK has a more informative error message when nltk_data
resource is not found, e.g.:
>>> from nltk import word_tokenize
>>> word_tokenize('x')
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/Users/l/alvas/git/nltk/nltk/tokenize/__init__.py", line 128, in word_tokenize
sentences = [text] if preserve_line else sent_tokenize(text, language)
File "/Users//alvas/git/nltk/nltk/tokenize/__init__.py", line 94, in sent_tokenize
tokenizer = load('tokenizers/punkt/{0}.pickle'.format(language))
File "/Users/alvas/git/nltk/nltk/data.py", line 820, in load
opened_resource = _open(resource_url)
File "/Users/alvas/git/nltk/nltk/data.py", line 938, in _open
return find(path_, path + ['']).open()
File "/Users/alvas/git/nltk/nltk/data.py", line 659, in find
raise LookupError(resource_not_found)
LookupError:
**********************************************************************
Resource punkt not found.
Please use the NLTK Downloader to obtain the resource:
>>> import nltk
>>> nltk.download('punkt')
Searched in:
- '/Users/alvas/nltk_data'
- '/usr/share/nltk_data'
- '/usr/local/share/nltk_data'
- '/usr/lib/nltk_data'
- '/usr/local/lib/nltk_data'
- ''
**********************************************************************
To find nltk_data
directory (auto-magically), see https://stackoverflow.com/a/36383314/610569
To download nltk_data
to a different path, see https://stackoverflow.com/a/48634212/610569
To config nltk_data
path (i.e. set a different path for NLTK to find nltk_data
), see https://stackoverflow.com/a/22987374/610569
@alvas has a good answer. But again it depends on the nature of the task, for example in your application you want to consider all conjunction
e.g. and, or, but, if, while and all determiner
e.g. the, a, some, most, every, no as stop words considering all others parts of speech as legitimate, then you might want to look into this solution which use Part-of-Speech Tagset to discard words, Check table 5.1:
import nltk
STOP_TYPES = ['DET', 'CNJ']
text = "some data here "
tokens = nltk.pos_tag(nltk.word_tokenize(text))
good_words = [w for w, wtype in tokens if wtype not in STOP_TYPES]
This works fine for me.
f = open(file_path, 'r+', encoding="utf-8")
You can add a third parameter encoding to ensure the encoding type is 'utf-8'
Note: this method works fine in Python3, I did not try it in Python2.7.
For four_grams it is already in NLTK, here is a piece of code that can help you toward this:
from nltk.collocations import *
import nltk
#You should tokenize your text
text = "I do not like green eggs and ham, I do not like them Sam I am!"
tokens = nltk.wordpunct_tokenize(text)
fourgrams=nltk.collocations.QuadgramCollocationFinder.from_words(tokens)
for fourgram, freq in fourgrams.ngram_fd.items():
print fourgram, freq
I hope it helps.
The readr package will fix this issue.
install.packages('readr')
library(readr)
readr::read_csv('yourfile.csv')
For me, the latest pip (1.5.6) works fine with the insecure nltk package if you just tell it not to be so picky about security:
pip install --upgrade --force-reinstall --allow-all-external --allow-unverified ntlk nltk
I had the same error when we imported a key into a keystore that was build using a 64bit OpenSSL Version. When we followed the same procedure to import the key into a keystore that was build using a 32 bit OpenSSL version everything went fine.
You need not to use even the package "tcltk". You can simply do as shown below:
write.csv(x, file = "c:\\myname\\yourfile.csv", row.names = FALSE)
Give your path inspite of "c:\myname\yourfile.csv".
I just used the following code, which removed all the punctuation:
tokens = nltk.wordpunct_tokenize(raw)
type(tokens)
text = nltk.Text(tokens)
type(text)
words = [w.lower() for w in text if w.isalpha()]
To save some folks some time, here is a list I extracted from a small corpus. I do not know if it is complete, but it should have most (if not all) of the help definitions from upenn_tagset...
CC: conjunction, coordinating
& 'n and both but either et for less minus neither nor or plus so
therefore times v. versus vs. whether yet
CD: numeral, cardinal
mid-1890 nine-thirty forty-two one-tenth ten million 0.5 one forty-
seven 1987 twenty '79 zero two 78-degrees eighty-four IX '60s .025
fifteen 271,124 dozen quintillion DM2,000 ...
DT: determiner
all an another any both del each either every half la many much nary
neither no some such that the them these this those
EX: existential there
there
IN: preposition or conjunction, subordinating
astride among uppon whether out inside pro despite on by throughout
below within for towards near behind atop around if like until below
next into if beside ...
JJ: adjective or numeral, ordinal
third ill-mannered pre-war regrettable oiled calamitous first separable
ectoplasmic battery-powered participatory fourth still-to-be-named
multilingual multi-disciplinary ...
JJR: adjective, comparative
bleaker braver breezier briefer brighter brisker broader bumper busier
calmer cheaper choosier cleaner clearer closer colder commoner costlier
cozier creamier crunchier cuter ...
JJS: adjective, superlative
calmest cheapest choicest classiest cleanest clearest closest commonest
corniest costliest crassest creepiest crudest cutest darkest deadliest
dearest deepest densest dinkiest ...
LS: list item marker
A A. B B. C C. D E F First G H I J K One SP-44001 SP-44002 SP-44005
SP-44007 Second Third Three Two * a b c d first five four one six three
two
MD: modal auxiliary
can cannot could couldn't dare may might must need ought shall should
shouldn't will would
NN: noun, common, singular or mass
common-carrier cabbage knuckle-duster Casino afghan shed thermostat
investment slide humour falloff slick wind hyena override subhumanity
machinist ...
NNP: noun, proper, singular
Motown Venneboerger Czestochwa Ranzer Conchita Trumplane Christos
Oceanside Escobar Kreisler Sawyer Cougar Yvette Ervin ODI Darryl CTCA
Shannon A.K.C. Meltex Liverpool ...
NNS: noun, common, plural
undergraduates scotches bric-a-brac products bodyguards facets coasts
divestitures storehouses designs clubs fragrances averages
subjectivists apprehensions muses factory-jobs ...
PDT: pre-determiner
all both half many quite such sure this
POS: genitive marker
' 's
PRP: pronoun, personal
hers herself him himself hisself it itself me myself one oneself ours
ourselves ownself self she thee theirs them themselves they thou thy us
PRP$: pronoun, possessive
her his mine my our ours their thy your
RB: adverb
occasionally unabatingly maddeningly adventurously professedly
stirringly prominently technologically magisterially predominately
swiftly fiscally pitilessly ...
RBR: adverb, comparative
further gloomier grander graver greater grimmer harder harsher
healthier heavier higher however larger later leaner lengthier less-
perfectly lesser lonelier longer louder lower more ...
RBS: adverb, superlative
best biggest bluntest earliest farthest first furthest hardest
heartiest highest largest least less most nearest second tightest worst
RP: particle
aboard about across along apart around aside at away back before behind
by crop down ever fast for forth from go high i.e. in into just later
low more off on open out over per pie raising start teeth that through
under unto up up-pp upon whole with you
TO: "to" as preposition or infinitive marker
to
UH: interjection
Goodbye Goody Gosh Wow Jeepers Jee-sus Hubba Hey Kee-reist Oops amen
huh howdy uh dammit whammo shucks heck anyways whodunnit honey golly
man baby diddle hush sonuvabitch ...
VB: verb, base form
ask assemble assess assign assume atone attention avoid bake balkanize
bank begin behold believe bend benefit bevel beware bless boil bomb
boost brace break bring broil brush build ...
VBD: verb, past tense
dipped pleaded swiped regummed soaked tidied convened halted registered
cushioned exacted snubbed strode aimed adopted belied figgered
speculated wore appreciated contemplated ...
VBG: verb, present participle or gerund
telegraphing stirring focusing angering judging stalling lactating
hankerin' alleging veering capping approaching traveling besieging
encrypting interrupting erasing wincing ...
VBN: verb, past participle
multihulled dilapidated aerosolized chaired languished panelized used
experimented flourished imitated reunifed factored condensed sheared
unsettled primed dubbed desired ...
VBP: verb, present tense, not 3rd person singular
predominate wrap resort sue twist spill cure lengthen brush terminate
appear tend stray glisten obtain comprise detest tease attract
emphasize mold postpone sever return wag ...
VBZ: verb, present tense, 3rd person singular
bases reconstructs marks mixes displeases seals carps weaves snatches
slumps stretches authorizes smolders pictures emerges stockpiles
seduces fizzes uses bolsters slaps speaks pleads ...
WDT: WH-determiner
that what whatever which whichever
WP: WH-pronoun
that what whatever whatsoever which who whom whosoever
WRB: Wh-adverb
how however whence whenever where whereby whereever wherein whereof why
This is actually on the main page of nltk.org:
>>> import nltk
>>> sentence = """At eight o'clock on Thursday morning
... Arthur didn't feel very good."""
>>> tokens = nltk.word_tokenize(sentence)
>>> tokens
['At', 'eight', "o'clock", 'on', 'Thursday', 'morning',
'Arthur', 'did', "n't", 'feel', 'very', 'good', '.']
Maybe it is too late, but I am answering for future searches. TO perform spelling mistake correction, you first need to make sure the word is not absurd or from slang like, caaaar, amazzzing etc. with repeated alphabets. So, we first need to get rid of these alphabets. As we know in English language words usually have a maximum of 2 repeated alphabets, e.g., hello., so we remove the extra repetitions from the words first and then check them for spelling. For removing the extra alphabets, you can use Regular Expression module in Python.
Once this is done use Pyspellchecker library from Python for correcting spellings.
For implementation visit this link: https://rustyonrampage.github.io/text-mining/2017/11/28/spelling-correction-with-python-and-nltk.html
From the document.getElementsByTagName
I guess you are running the javascript in a browser.
The traditional way to expose functionality to javascript running in the browser is calling a remote URL using AJAX. The X in AJAX is for XML, but nowadays everybody uses JSON instead of XML.
For example, using jQuery you can do something like:
$.getJSON('http://example.com/your/webservice?param1=x¶m2=y',
function(data, textStatus, jqXHR) {
alert(data);
}
)
You will need to implement a python webservice on the server side. For simple webservices I like to use Flask.
A typical implementation looks like:
@app.route("/your/webservice")
def my_webservice():
return jsonify(result=some_function(**request.args))
You can run IronPython (kind of Python.Net) in the browser with silverlight, but I don't know if NLTK is available for IronPython.
First off, if you want to extract count features and apply TF-IDF normalization and row-wise euclidean normalization you can do it in one operation with TfidfVectorizer
:
>>> from sklearn.feature_extraction.text import TfidfVectorizer
>>> from sklearn.datasets import fetch_20newsgroups
>>> twenty = fetch_20newsgroups()
>>> tfidf = TfidfVectorizer().fit_transform(twenty.data)
>>> tfidf
<11314x130088 sparse matrix of type '<type 'numpy.float64'>'
with 1787553 stored elements in Compressed Sparse Row format>
Now to find the cosine distances of one document (e.g. the first in the dataset) and all of the others you just need to compute the dot products of the first vector with all of the others as the tfidf vectors are already row-normalized.
As explained by Chris Clark in comments and here Cosine Similarity does not take into account the magnitude of the vectors. Row-normalised have a magnitude of 1 and so the Linear Kernel is sufficient to calculate the similarity values.
The scipy sparse matrix API is a bit weird (not as flexible as dense N-dimensional numpy arrays). To get the first vector you need to slice the matrix row-wise to get a submatrix with a single row:
>>> tfidf[0:1]
<1x130088 sparse matrix of type '<type 'numpy.float64'>'
with 89 stored elements in Compressed Sparse Row format>
scikit-learn already provides pairwise metrics (a.k.a. kernels in machine learning parlance) that work for both dense and sparse representations of vector collections. In this case we need a dot product that is also known as the linear kernel:
>>> from sklearn.metrics.pairwise import linear_kernel
>>> cosine_similarities = linear_kernel(tfidf[0:1], tfidf).flatten()
>>> cosine_similarities
array([ 1. , 0.04405952, 0.11016969, ..., 0.04433602,
0.04457106, 0.03293218])
Hence to find the top 5 related documents, we can use argsort
and some negative array slicing (most related documents have highest cosine similarity values, hence at the end of the sorted indices array):
>>> related_docs_indices = cosine_similarities.argsort()[:-5:-1]
>>> related_docs_indices
array([ 0, 958, 10576, 3277])
>>> cosine_similarities[related_docs_indices]
array([ 1. , 0.54967926, 0.32902194, 0.2825788 ])
The first result is a sanity check: we find the query document as the most similar document with a cosine similarity score of 1 which has the following text:
>>> print twenty.data[0]
From: [email protected] (where's my thing)
Subject: WHAT car is this!?
Nntp-Posting-Host: rac3.wam.umd.edu
Organization: University of Maryland, College Park
Lines: 15
I was wondering if anyone out there could enlighten me on this car I saw
the other day. It was a 2-door sports car, looked to be from the late 60s/
early 70s. It was called a Bricklin. The doors were really small. In addition,
the front bumper was separate from the rest of the body. This is
all I know. If anyone can tellme a model name, engine specs, years
of production, where this car is made, history, or whatever info you
have on this funky looking car, please e-mail.
Thanks,
- IL
---- brought to you by your neighborhood Lerxst ----
The second most similar document is a reply that quotes the original message hence has many common words:
>>> print twenty.data[958]
From: [email protected] (Robert Seymour)
Subject: Re: WHAT car is this!?
Article-I.D.: reed.1993Apr21.032905.29286
Reply-To: [email protected]
Organization: Reed College, Portland, OR
Lines: 26
In article <[email protected]> [email protected] (where's my
thing) writes:
>
> I was wondering if anyone out there could enlighten me on this car I saw
> the other day. It was a 2-door sports car, looked to be from the late 60s/
> early 70s. It was called a Bricklin. The doors were really small. In
addition,
> the front bumper was separate from the rest of the body. This is
> all I know. If anyone can tellme a model name, engine specs, years
> of production, where this car is made, history, or whatever info you
> have on this funky looking car, please e-mail.
Bricklins were manufactured in the 70s with engines from Ford. They are rather
odd looking with the encased front bumper. There aren't a lot of them around,
but Hemmings (Motor News) ususally has ten or so listed. Basically, they are a
performance Ford with new styling slapped on top.
> ---- brought to you by your neighborhood Lerxst ----
Rush fan?
--
Robert Seymour [email protected]
Physics and Philosophy, Reed College (NeXTmail accepted)
Artificial Life Project Reed College
Reed Solar Energy Project (SolTrain) Portland, OR
This header is getting somehow deprecated. You can read more about it here - X-XSS-Protection
- Chrome has removed their XSS Auditor
- Firefox has not, and will not implement X-XSS-Protection
- Edge has retired their XSS filter
This means that if you do not need to support legacy browsers, it is recommended that you use Content-Security-Policy without allowing unsafe-inline scripts instead.
I suppose you have a list of words (word_list) from which you want to remove stopwords. You could do something like this:
filtered_word_list = word_list[:] #make a copy of the word_list
for word in word_list: # iterate over word_list
if word in stopwords.words('english'):
filtered_word_list.remove(word) # remove word from filtered_word_list if it is a stopword
In Python-3.6
I can see the suggestion in the traceback. That's quite helpful.
Hence I will say you guys to pay attention to the error you got, most of the time answers are within that problem ;).
And then as suggested by other folks here either using python terminal or using a command like python -c "import nltk; nltk.download('wordnet')"
we can install them on the fly.
You just need to run that command once and then it will save the data locally in your home directory.
Here is how I fixed mine:
find the location where your jre is installed. in my case, it was located at C:\Program Files\Java\jdk1.7.0_10
copy the jre folder and paste it where your eclipse files are located (where eclipse.exe is located).
when you download eclipse, you get a .zip package containing eclipse.exe and all the other files needed to run eclipse but it is missing the jre files. so all you need to do is to find where jre folder is located on your hard drive and add it to the rest of the eclipse package.
I find that there are 3 package-based solutions to solve the problem. They are pyenchant, wordnet and corpus(self-defined or from ntlk). Pyenchant couldn't installed easily in win64 with py3. Wordnet doesn't work very well because it's corpus isn't complete. So for me, I choose the solution answered by @Sadik, and use 'set(words.words())' to speed up.
First:
pip3 install nltk
python3
import nltk
nltk.download('words')
Then:
from nltk.corpus import words
setofwords = set(words.words())
print("hello" in setofwords)
>>True
I assume entropy was mentioned in the context of building decision trees.
To illustrate, imagine the task of learning to classify first-names into male/female groups. That is given a list of names each labeled with either m
or f
, we want to learn a model that fits the data and can be used to predict the gender of a new unseen first-name.
name gender
----------------- Now we want to predict
Ashley f the gender of "Amro" (my name)
Brian m
Caroline f
David m
First step is deciding what features of the data are relevant to the target class we want to predict. Some example features include: first/last letter, length, number of vowels, does it end with a vowel, etc.. So after feature extraction, our data looks like:
# name ends-vowel num-vowels length gender
# ------------------------------------------------
Ashley 1 3 6 f
Brian 0 2 5 m
Caroline 1 4 8 f
David 0 2 5 m
The goal is to build a decision tree. An example of a tree would be:
length<7
| num-vowels<3: male
| num-vowels>=3
| | ends-vowel=1: female
| | ends-vowel=0: male
length>=7
| length=5: male
basically each node represent a test performed on a single attribute, and we go left or right depending on the result of the test. We keep traversing the tree until we reach a leaf node which contains the class prediction (m
or f
)
So if we run the name Amro down this tree, we start by testing "is the length<7?" and the answer is yes, so we go down that branch. Following the branch, the next test "is the number of vowels<3?" again evaluates to true. This leads to a leaf node labeled m
, and thus the prediction is male (which I happen to be, so the tree predicted the outcome correctly).
The decision tree is built in a top-down fashion, but the question is how do you choose which attribute to split at each node? The answer is find the feature that best splits the target class into the purest possible children nodes (ie: nodes that don't contain a mix of both male and female, rather pure nodes with only one class).
This measure of purity is called the information. It represents the expected amount of information that would be needed to specify whether a new instance (first-name) should be classified male or female, given the example that reached the node. We calculate it based on the number of male and female classes at the node.
Entropy on the other hand is a measure of impurity (the opposite). It is defined for a binary class with values a
/b
as:
Entropy = - p(a)*log(p(a)) - p(b)*log(p(b))
This binary entropy function is depicted in the figure below (random variable can take one of two values). It reaches its maximum when the probability is p=1/2
, meaning that p(X=a)=0.5
or similarlyp(X=b)=0.5
having a 50%/50% chance of being either a
or b
(uncertainty is at a maximum). The entropy function is at zero minimum when probability is p=1
or p=0
with complete certainty (p(X=a)=1
or p(X=a)=0
respectively, latter implies p(X=b)=1
).
Of course the definition of entropy can be generalized for a discrete random variable X with N outcomes (not just two):
(the log
in the formula is usually taken as the logarithm to the base 2)
Back to our task of name classification, lets look at an example. Imagine at some point during the process of constructing the tree, we were considering the following split:
ends-vowel
[9m,5f] <--- the [..,..] notation represents the class
/ \ distribution of instances that reached a node
=1 =0
------- -------
[3m,4f] [6m,1f]
As you can see, before the split we had 9 males and 5 females, i.e. P(m)=9/14
and P(f)=5/14
. According to the definition of entropy:
Entropy_before = - (5/14)*log2(5/14) - (9/14)*log2(9/14) = 0.9403
Next we compare it with the entropy computed after considering the split by looking at two child branches. In the left branch of ends-vowel=1
, we have:
Entropy_left = - (3/7)*log2(3/7) - (4/7)*log2(4/7) = 0.9852
and the right branch of ends-vowel=0
, we have:
Entropy_right = - (6/7)*log2(6/7) - (1/7)*log2(1/7) = 0.5917
We combine the left/right entropies using the number of instances down each branch as weight factor (7 instances went left, and 7 instances went right), and get the final entropy after the split:
Entropy_after = 7/14*Entropy_left + 7/14*Entropy_right = 0.7885
Now by comparing the entropy before and after the split, we obtain a measure of information gain, or how much information we gained by doing the split using that particular feature:
Information_Gain = Entropy_before - Entropy_after = 0.1518
You can interpret the above calculation as following: by doing the split with the end-vowels
feature, we were able to reduce uncertainty in the sub-tree prediction outcome by a small amount of 0.1518 (measured in bits as units of information).
At each node of the tree, this calculation is performed for every feature, and the feature with the largest information gain is chosen for the split in a greedy manner (thus favoring features that produce pure splits with low uncertainty/entropy). This process is applied recursively from the root-node down, and stops when a leaf node contains instances all having the same class (no need to split it further).
Note that I skipped over some details which are beyond the scope of this post, including how to handle numeric features, missing values, overfitting and pruning trees, etc..
I use this simple method:
public Dictionary<string, string> objToDict(XYZ.ObjectCollection objs) {
var dict = new Dictionary<string, string>();
foreach (KeyValuePair<string, string> each in objs){
dict.Add(each.Key, each.Value);
}
return dict;
}
Arrays.
Stack:
var stack = [];
//put value on top of stack
stack.push(1);
//remove value from top of stack
var value = stack.pop();
Queue:
var queue = [];
//put value on end of queue
queue.push(1);
//Take first value from queue
var value = queue.shift();
I'd do it like this:
Get-ChildItem -Path $folder -r |
? { $_.PsIsContainer -and $_.FullName -notmatch 'archive' }
In Python version 3.6 and above you can use f-string to format result.
str = "hello world"
print(" ".join(f"{ord(i):08b}" for i in str))
01101000 01100101 01101100 01101100 01101111 00100000 01110111 01101111 01110010 01101100 01100100
The left side of the colon, ord(i), is the actual object whose value will be formatted and inserted into the output. Using ord() gives you the base-10 code point for a single str character.
The right hand side of the colon is the format specifier. 08 means width 8, 0 padded, and the b functions as a sign to output the resulting number in base 2 (binary).
In MySQL Workbench:
Left-hand side navigator > Management > Client Connections
It gives you the option to kill queries and connections.
Note: this is not TOAD like the OP asked, but MySQL Workbench users like me may end up here
You can always disable the use of pre-compiled headers in the project settings.
Instructions for VS 2010 (should be similar for other versions of VS):
Select your project, use the "Project -> Properties" menu and go to the "Configuration Properties -> C/C++ -> Precompiled Headers" section, then change the "Precompiled Header" setting to "Not Using Precompiled Headers" option.
If you are only trying to setup a minimal Visual Studio project for simple C++ command-line programs (such as those developed in introductory C++ programming classes), you can create an empty C++ project.
It might be easier to read when written out in longhand using the 'simple case' e.g.
CASE DeviceID
WHEN '7 ' THEN '01'
WHEN '10 ' THEN '01'
WHEN '62 ' THEN '01'
WHEN '58 ' THEN '01'
WHEN '60 ' THEN '01'
WHEN '46 ' THEN '01'
WHEN '48 ' THEN '01'
WHEN '50 ' THEN '01'
WHEN '137' THEN '01'
WHEN '139' THEN '01'
WHEN '142' THEN '01'
WHEN '143' THEN '01'
WHEN '164' THEN '01'
WHEN '8 ' THEN '02'
WHEN '9 ' THEN '02'
WHEN '63 ' THEN '02'
WHEN '59 ' THEN '02'
WHEN '61 ' THEN '02'
WHEN '47 ' THEN '02'
WHEN '49 ' THEN '02'
WHEN '51 ' THEN '02'
WHEN '138' THEN '02'
WHEN '140' THEN '02'
WHEN '141' THEN '02'
WHEN '144' THEN '02'
WHEN '165' THEN '02'
ELSE 'NA'
END AS clocking
...which kind makes me thing that perhaps you could benefit from a lookup table to which you can JOIN
to eliminate the CASE
expression entirely.
you can also use the class name.
$(".yourclass").val();
Here is a guide on how to use cntlm
cntlm is an NTLM/NTLMv2 authenticating HTTP proxy
It takes the address of your proxy and opens a listening socket, forwarding each request to the parent proxy
Using cntlm we make it possible to run tools like choro, pip3, apt-get
from a command line
pip3 install requests
choco install git
The main advantage of cntlm is password protection.
With cntlm you can use password hashes.
So NO PLAINTEXT PASSWORD in %HTTP_PROXY%
and %HTTPS_PROXY%
environment variables
You can get the latest cntlm release from sourceforge
My username is zezulinsky
My domain is local
When I run commands I use zezulinsky@local
Place your username when you run commands
Run a command
cntlm -u zezulinsky@local -H
Enter your password:
Password:
As a result you are getting hashed password:
PassLM AB7D42F42QQQQ407552C4BCA4AEBFB11
PassNT PE78D847E35FA7FA59710D1231AAAF99
PassNTLMv2 46738B2E607F9093296AA4C319C3A259
Run a command
cntlm -u zezulinsky@local -M http://google.com
Enter your password
Password:
The result output
Config profile 1/4... OK (HTTP code: 301)
----------------------------[ Profile 0 ]------
Auth NTLMv2
PassNTLMv2 46738B2E607F9093296AA4C319C3A259
------------------------------------------------
Note! check that PassNTLMv2 hash is the same The resulting hash is the same for both commands
PassNTLMv2 46738B2E607F9093296AA4C319C3A259
Place generated hashes into the cntlm.ini
configuration file
C:\Program Files (x86)\Cntlm\cntlm.ini
Here is how your cntlm.ini
should look like
Username zezulinsky
Domain local
PassLM AB7D42F42QQQQ407552C4BCA4AEBFB11
PassNT PE78D847E35FA7FA59710D1231AAAF99
PassNTLMv2 46738B2E607F9093296AA4C319C3A259
Proxy PROXYSERVER:8080
NoProxy localhost, 127.0.0.*
Listen 3128
It is important to add a newline at the end of the cntlm.ini
configuration file
HTTPS_PROXY=http://localhost:3128
HTTP_PROXY=http://localhost:3128
Stop all the processes named cntlm.exe
with process explorer
Run the command
cntlm -u zezulinsky@local -H
The output looks like
cygwin warning:
MS-DOS style path detected: C:\Program Files (x86)\Cntlm\cntlm.ini
Preferred POSIX equivalent is: /Cntlm/cntlm.ini
CYGWIN environment variable option "nodosfilewarning" turns off this warning.
Consult the user's guide for more details about POSIX paths:
http://cygwin.com/cygwin-ug-net/using.html#using-pathnames
section: local, Username = 'zezulinsky'
section: local, Domain = 'local'
section: local, PassLM = 'AB7D42F42QQQQ407552C4BCA4AEBFB11'
section: local, PassNT = 'PE78D847E35FA7FA59710D1231AAAF99'
section: local, PassNTLMv2 = '46738B2E607F9093296AA4C319C3A259'
section: local, Proxy = 'PROXYSERVER:8080'
section: local, NoProxy = 'localhost, 10.*, 127.0.0.*
section: local, Listen = '3128'
Default config file opened successfully
cntlm: Proxy listening on 127.0.0.1:3128
Adding no-proxy for: 'localhost'
Adding no-proxy for: '10.*'
Adding no-proxy for: '127.0.0.*'
cntlm: Workstation name used: MYWORKSTATION
cntlm: Using following NTLM hashes: NTLMv2(1) NT(0) LM(0)
cntlm: PID 1234: Cntlm ready, staying in the foreground
Open a new cmd and run a command:
pip3 install requests
You should have requests python package installed
Congrats, now you have cntlm installed and configured
I needed to find the position of an element inside a ListView and used this snippet that works kind of like .offset
:
const UIManager = require('NativeModules').UIManager;
const handle = React.findNodeHandle(this.refs.myElement);
UIManager.measureLayoutRelativeToParent(
handle,
(e) => {console.error(e)},
(x, y, w, h) => {
console.log('offset', x, y, w, h);
});
This assumes I had a ref='myElement'
on my component.
If you use OnClick action on EditText like:
java:
mEditInit = (EditText) findViewById(R.id.date_init);
mEditInit.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
showDialog(DATEINIT_DIALOG);
}
});
or kotlin:
editTextChooseDate.setOnClickListener {
showDialog(DATEINIT_DIALOG)
}
So, it will work perfectly if you put into xml
of your EditText
the following lines:
android:inputType="none"
android:focusable="false"
android:cursorVisible="false"
For example:
<EditText
android:id="@+id/date_init"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text=""
android:hint="Select Date"
android:inputType="none"
android:focusable="false"
android:cursorVisible="false"/>
or for MaterialDesign
<com.google.android.material.textfield.TextInputLayout
android:id="@+id/layoutEditTextChooseDate"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent">
<com.google.android.material.textfield.TextInputEditText
android:id="@+id/date_init"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text=""
android:hint="Select Date"
android:inputType="none"
android:focusable="false"
android:cursorVisible="false"/>
</com.google.android.material.textfield.TextInputLayout>
You should have a look on the -regextype
argument of find
, see manpage:
-regextype type
Changes the regular expression syntax understood by -regex and -iregex
tests which occur later on the command line. Currently-implemented
types are emacs (this is the default), posix-awk, posix-basic,
posix-egrep and posix-extended.
I guess the emacs
type doesn't support the [[:digit:]]
construct. I tried it with posix-extended
and it worked as expected:
find -regextype posix-extended -regex '.*[1234567890]'
find -regextype posix-extended -regex '.*[[:digit:]]'
This message means you're trying to compare a number and a string in a WHERE
or ON
clause. In your query, the only potential place where that could be occurring is ON ac.company_code = ta.company_code
; either make sure they have similar declarations, or use an explicit CAST
to convert the number to a string.
If you turn off strict
mode, the error should turn into a warning.
I had same problem and solution was obj = ClassName.objects.filter()
This is a start may be :
- hosts: all
gather_facts: no
tasks:
- shell: ps -eo pcpu,user,args | sort -r -k1 | head -n5
register: ps
- local_action: command echo item
with_items: ps.stdout_lines
NOTE: Docs regarding ps.stdout_lines
are covered here: ('Register Variables' chapter).
There's actually quite a bit of useful information added to debug allocations. This table is more complete:
http://www.nobugs.org/developer/win32/debug_crt_heap.html#table
Address Offset After HeapAlloc() After malloc() During free() After HeapFree() Comments 0x00320FD8 -40 0x01090009 0x01090009 0x01090009 0x0109005A Win32 heap info 0x00320FDC -36 0x01090009 0x00180700 0x01090009 0x00180400 Win32 heap info 0x00320FE0 -32 0xBAADF00D 0x00320798 0xDDDDDDDD 0x00320448 Ptr to next CRT heap block (allocated earlier in time) 0x00320FE4 -28 0xBAADF00D 0x00000000 0xDDDDDDDD 0x00320448 Ptr to prev CRT heap block (allocated later in time) 0x00320FE8 -24 0xBAADF00D 0x00000000 0xDDDDDDDD 0xFEEEFEEE Filename of malloc() call 0x00320FEC -20 0xBAADF00D 0x00000000 0xDDDDDDDD 0xFEEEFEEE Line number of malloc() call 0x00320FF0 -16 0xBAADF00D 0x00000008 0xDDDDDDDD 0xFEEEFEEE Number of bytes to malloc() 0x00320FF4 -12 0xBAADF00D 0x00000001 0xDDDDDDDD 0xFEEEFEEE Type (0=Freed, 1=Normal, 2=CRT use, etc) 0x00320FF8 -8 0xBAADF00D 0x00000031 0xDDDDDDDD 0xFEEEFEEE Request #, increases from 0 0x00320FFC -4 0xBAADF00D 0xFDFDFDFD 0xDDDDDDDD 0xFEEEFEEE No mans land 0x00321000 +0 0xBAADF00D 0xCDCDCDCD 0xDDDDDDDD 0xFEEEFEEE The 8 bytes you wanted 0x00321004 +4 0xBAADF00D 0xCDCDCDCD 0xDDDDDDDD 0xFEEEFEEE The 8 bytes you wanted 0x00321008 +8 0xBAADF00D 0xFDFDFDFD 0xDDDDDDDD 0xFEEEFEEE No mans land 0x0032100C +12 0xBAADF00D 0xBAADF00D 0xDDDDDDDD 0xFEEEFEEE Win32 heap allocations are rounded up to 16 bytes 0x00321010 +16 0xABABABAB 0xABABABAB 0xABABABAB 0xFEEEFEEE Win32 heap bookkeeping 0x00321014 +20 0xABABABAB 0xABABABAB 0xABABABAB 0xFEEEFEEE Win32 heap bookkeeping 0x00321018 +24 0x00000010 0x00000010 0x00000010 0xFEEEFEEE Win32 heap bookkeeping 0x0032101C +28 0x00000000 0x00000000 0x00000000 0xFEEEFEEE Win32 heap bookkeeping 0x00321020 +32 0x00090051 0x00090051 0x00090051 0xFEEEFEEE Win32 heap bookkeeping 0x00321024 +36 0xFEEE0400 0xFEEE0400 0xFEEE0400 0xFEEEFEEE Win32 heap bookkeeping 0x00321028 +40 0x00320400 0x00320400 0x00320400 0xFEEEFEEE Win32 heap bookkeeping 0x0032102C +44 0x00320400 0x00320400 0x00320400 0xFEEEFEEE Win32 heap bookkeeping
In order to resolve java.lang.OutOfMemoryError: Java heap space in Maven, try to configure below configuration in pom
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>${maven-surefire-plugin.version}</version>
<configuration>
<verbose>true</verbose>
<fork>true</fork>
<argLine>-XX:MaxPermSize=500M</argLine>
</configuration>
</plugin>
Manually:
int strlen(string s)
{
int len = 0;
while (s[len])
len++;
return len;
}
I had multiple projects in the solution, but I had the correct Default Project set, so I thought it should work.
In the end, I had to add the -StartupProject MyProjectName
option to the command
You cannot add JavaScript variable to HTML code.
For this you need to do in following way.
<html>
<head>
<script type="text/javscript">
var number = 123;
document.addEventListener('DOMContentLoaded', function() {
document.getElementByTagName("h1").innerHTML("the value for number is: " + number);
});
</script>
</head>
<body>
<h1></h1>
</body>
</html>
File modification:
ls -t
Inode change:
ls -tc
File access:
ls -tu
"Newest" one at the bottom:
ls -tr
None of this is a creation time. Most Unix filesystems don't support creation timestamps.
You can try this click event
private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
{
if (e.RowIndex >= 0)
{
DataGridViewRow row = this.dataGridView1.Rows[e.RowIndex];
Eid_txt.Text = row.Cells["Employee ID"].Value.ToString();
Name_txt.Text = row.Cells["First Name"].Value.ToString();
Surname_txt.Text = row.Cells["Last Name"].Value.ToString();
You can use loop for.
var items = {1, 2, 3}
for(var i = 0; i < items.length; i++) {
if(i == items.length - 1) {
res.ok(i);
}
}
With latest git you may use --patch
option
git stash push --patch # since 2.14.6
git stash save --patch # for older git versions
And git will ask you for each change in your files to add or not into stash.
You just answer y
or n
UPD
Alias for DOUBLE STASH:
git config --global alias.stash-staged '!bash -c "git stash --keep-index; git stash push -m "staged" --keep-index; git stash pop stash@{1}"'
Now you can stage your files and then run git stash-staged
.
As result your staged files will be saved into stash.
If you do not want to keep staged files and want move them into stash. Then you can add another alias and run git move-staged
:
git config --global alias.move-staged '!bash -c "git stash-staged;git commit -m "temp"; git stash; git reset --hard HEAD^; git stash pop"'
MimeTypeMap.getSingleton().getExtensionFromMimeType(file.getName());
Probably, this is the easiest solution.
https://developer.android.com/reference/android/webkit/MimeTypeMap
private void openFile(File file) {
Uri uri = Uri.fromFile(file);
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(uri, MimeTypeMap.getSingleton().getExtensionFromMimeType(file.getName()));
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(Intent.createChooser(intent, "Open " + file.getName() + " with ..."));
}
In my case, the value of the Key was incorrect in Web.config
file:
<defaultDocument>
<files>
<add value="Portal.htm" />
</files>
</defaultDocument>
when I change the value to "Portal.html" it worked.
This is the most important thing to know about the Tuple type. Tuple is a class, not a struct. It thus will be allocated upon the managed heap. Each class instance that is allocated adds to the burden of garbage collection.
Note: The properties Item1, Item2, and further do not have setters. You cannot assign them. The Tuple is immutable once created in memory.
UPDATE: I suggest using a solution with filters, provided by @Jess.
I would write a method for that, and then where you need to format price you can just put the method in the template and pass value down
methods: {
formatPrice(value) {
let val = (value/1).toFixed(2).replace('.', ',')
return val.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ".")
}
}
And then in template:
<template>
<div>
<div class="panel-group"v-for="item in list">
<div class="col-md-8">
<small>
Total: <b>{{ formatPrice(item.total) }}</b>
</small>
</div>
</div>
</div>
</template>
BTW - I didn't put too much care on replacing and regular expression. It could be improved.enter code here
Vue.filter('tableCurrency', num => {_x000D_
if (!num) {_x000D_
return '0.00';_x000D_
}_x000D_
const number = (num / 1).toFixed(2).replace(',', '.');_x000D_
return number.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ',');_x000D_
});
_x000D_
The 'c' means it's a character special file.
Note: I had problem on Windows 7 but it might help you as well..
I had problem with android studio detecting my phone(Acer Liquid Zest 4G), tried restarting android studio, switching back and forth between PTP and MTP, OS was able to detect device normally.
So what I did was, in Developer Options i enabled USB debugging, USB connection is in PTP mode, then from phone manufacturer's site (you can find site for your phone here: https://developer.android.com/studio/run/oem-usb.html), I downloaded USB driver for my phone model, installed driver and android studio was able to detect my phone(there was no need for restart).
I will repeat again, you must have USB Debugging enabled in Developer Options, otherwise it won't work. Hope it helps.
If you want both to reference the same variable, one of them should have int k;
, and the other should have extern int k;
For this situation, you typically put the definition (int k;
) in one .cpp
file, and put the declaration (extern int k;
) in a header, to be included wherever you need access to that variable.
If you want each k
to be a separate variable that just happen to have the same name, you can either mark them as static
, like: static int k;
(in all files, or at least all but one file). Alternatively, you can us an anonymous namespace:
namespace {
int k;
};
Again, in all but at most one of the files.
In C, the compiler generally isn't quite so picky about this. Specifically, C has a concept of a "tentative definition", so if you have something like int k;
twice (in either the same or separate source files) each will be treated as a tentative definition, and there won't be a conflict between them. This can be a bit confusing, however, because you still can't have two definitions that both include initializers--a definition with an initializer is always a full definition, not a tentative definition. In other words, int k = 1;
appearing twice would be an error, but int k;
in one place and int k = 1;
in another would not. In this case, the int k;
would be treated as a tentative definition and the int k = 1;
as a definition (and both refer to the same variable).
There is sparrow plugin docker-remove-dangling-images you can use to clean up stopped containers and unused (dangling) images:
$ sparrow plg run docker-remove-dangling-images
It works both for Linux and Windows OS.
Great answers!
One thing that I would like to clarify deeper is nonatomic
/atomic
.
The user should understand that this property - "atomicity" spreads only on the attribute's reference and not on it's contents.
I.e. atomic
will guarantee the user atomicity for reading/setting the pointer and only the pointer to the attribute.
For example:
@interface MyClass: NSObject
@property (atomic, strong) NSDictionary *dict;
...
In this case it is guaranteed that the pointer to the dict
will be read/set in the atomic manner by different threads.
BUT the dict
itself (the dictionary dict
pointing to) is still thread unsafe, i.e. all read/add operations to the dictionary are still thread unsafe.
If you need thread safe collection you either have bad architecture (more often) OR real requirement (more rare). If it is "real requirement" - you should either find good&tested thread safe collection component OR be prepared for trials and tribulations writing your own one. It latter case look at "lock-free", "wait-free" paradigms. Looks like rocket-science at a first glance, but could help you achieving fantastic performance in comparison to "usual locking".
You can do this:
add-pssnapin Microsoft.Exchange.Management.PowerShell.E2010
and most of it will work (although MS support will tell you that doing this is not supported because it bypasses RBAC).
I've seen issues with some cmdlets (specifically enable/disable UMmailbox) not working with just the snapin loaded.
In Exchange 2010, they basically don't support using Powershell outside of the the implicit remoting environment of an actual EMS shell.
You must create your own SSLSocketFactory based on Bouncy Castle. After to use it, pass to the common HttpsConnextion for using this customized SocketFactory.
1. First : Create a TLSConnectionFactory
Here one tips:
1.1 Extend SSLConnectionFactory
1.2 Override this method :
@Override
public Socket createSocket(Socket socket, final String host, int port, boolean arg3)
This method will call the next internal method,
1.3 Implement an internal method _createSSLSocket(host, tlsClientProtocol);
Here you must create a Socket using TlsClientProtocol . The trick is override ...startHandshake() method calling TlsClientProtocol
private SSLSocket _createSSLSocket(final String host , final TlsClientProtocol tlsClientProtocol) {
return new SSLSocket() {
.... Override and implement SSLSocket methods, particulary:
startHandshake() {
}
}
Important : The full sample how to use TLS Client Protocol is well explained here: Using BouncyCastle for a simple HTTPS query
2. Second : Use this Customized SSLConnextionFactory on common HTTPSConnection.
This is important ! In other samples you can see into the web , u see hard-coded HTTP Commands....so with a customized SSLConnectionFactory u don't need nothing more...
URL myurl = new URL( "http:// ...URL tha only Works in TLS 1.2);
HttpsURLConnection con = (HttpsURLConnection )myurl.openConnection();
con.setSSLSocketFactory(new TSLSocketConnectionFactory());
Use ng-bind-html this is only proper and simplest way
Embed is not a standard tag, though object is. Here's an article that looks like it will help you, since it seems the situation is not so simple. An example for PDF is included.
IF EXISTS(SELECT * FROM service s WHERE s.service_id = ?)
BEGIN
--DO STUFF HERE
END
You Need to take same height and width
and simply use the border-radius:360px;
By default git revert
refuses to revert a merge commit as what that actually means is ambiguous. I presume that your HEAD
is in fact a merge commit.
If you want to revert the merge commit, you have to specify which parent of the merge you want to consider to be the main trunk, i.e. what you want to revert to.
Often this will be parent number one, for example if you were on master
and did git merge unwanted
and then decided to revert the merge of unwanted
. The first parent would be your pre-merge master
branch and the second parent would be the tip of unwanted
.
In this case you could do:
git revert -m 1 HEAD
public void onPressed(Button button, int drawable) {
if (!isPressed) {
button.setBackgroundResource(R.drawable.bg_circle);
isPressed = true;
} else {
button.setBackgroundResource(drawable);
isPressed = false;
}
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.circle1:
onPressed(circle1, R.drawable.bg_circle_gradient);
break;
case R.id.circle2:
onPressed(circle2, R.drawable.bg_circle2_gradient);
break;
case R.id.circle3:
onPressed(circle3, R.drawable.bg_circle_gradient3);
break;
case R.id.circle4:
onPressed(circle4, R.drawable.bg_circle4_gradient);
break;
case R.id.circle5:
onPressed(circle5, R.drawable.bg_circle5_gradient);
break;
case R.id.circle6:
onPressed(circle6, R.drawable.bg_circle_gradient);
break;
case R.id.circle7:
onPressed(circle7, R.drawable.bg_circle4_gradient);
break;
}
please try this, in this code i m trying to change the background of button on button click this works fine.
The code of Ellbar works! You need only add using.
1 - using Microsoft.AspNet.Identity;
And... the code of Ellbar:
2 - string currentUserId = User.Identity.GetUserId();
ApplicationUser currentUser = db.Users.FirstOrDefault(x => x.Id == currentUserId);
With this code (in currentUser
), you work the general data of the connected user, if you want extra data... see this link
You can use the Conditional Formatting to replace text and NOT effect any formulas. Simply go to the Rule's format where you will see Number, Font, Border and Fill.
Go to the Number tab and select CUSTOM
. Then simply type where it says TYPE
: what you want to say in QUOTES.
Example.. "OTHER"
var inputs = document.querySelectorAll("input[type=text]") ||
(function() {
var ret=[], elems = document.getElementsByTagName('input'), i=0,l=elems.length;
for (;i<l;i++) {
if (elems[i].type.toLowerCase() === "text") {
ret.push(elems[i]);
}
}
return ret;
}());
On Mac, I checked the mysql error log file at:
/Applications/XAMPP/xamppfiles/var/mysql/MyPCName.local.err
There I found
InnoDB: Error: could not open single-table tablespace file ./some_db_name/some_table_name.ibd
After I deleted that .ibd file and then started MySql, it started.
On your device:
Go to settings/ developer settings/ allow USB debug mode
If 'allow USB debug mode' option is disabled. Then you might have the device currently connected to your PC. Disconnect the device and the option should now be available
Note: On Android 4.2 and newer, Developer options is hidden by default. To make it available, go to Settings > About phone and tap Build number seven times. Return to the previous screen to find Developer options.
If it still doesn't help, you can google it with this expression:
How to enable developer options on YOUR_PHONE_TYPE
@JohnHartsock: You can also write type="password". It's acceptable in aspx.
<asp:TextBox ID="txtBox" type="password" runat="server"/>
I got same error. This is how it worked for me:
Worked perfectly!
ytd2
is a fully functional YouTube video downloader. Check out its source code if you want to see how it's done.
Alternatively, you can also call an external process like youtube-dl
to do the job. This is probably the easiest solution but it isn't in "pure" Java.
The manual for json_encode specifies this:
All string data must be UTF-8 encoded.
Thus, try array_map
ping utf8_encode()
to your array before you encode it:
$arr = array_map('utf8_encode', $arr);
$json = json_encode($arr);
// {"funds":"ComStage STOXX\u00c2\u00aeEurope 600 Techn NR ETF"}
For reference, take a look at the differences between the three examples on this fiddle. The first doesn't use character encoding, the second uses htmlentities
and the third uses utf8_encode
- they all return different results.
For consistency, you should use utf8_encode()
.
Docs
To answer the title of your question directly because this comes up in Google first:
YES, TypeScript can export a function!
Here is a direct quote from the TS Documentation:
"Any declaration (such as a variable, function, class, type alias, or interface) can be exported by adding the export keyword."
Sending headers earlier than the normal course may have far reaching consequences. Below are just a few of them that happened to come to my mind at the moment:
While current PHP releases may have output buffering on, the actual production servers you will be deploying your code on are far more important than any development or testing machines. And they do not always tend to follow latest PHP trends immediately.
You may have headaches over inexplicable functionality loss. Say, you are implementing some kind payment gateway, and redirect user to a specific URL after successful confirmation by the payment processor. If some kind of PHP error, even a warning, or an excess line ending happens, the payment may remain unprocessed and the user may still seem unbilled. This is also one of the reasons why needless redirection is evil and if redirection is to be used, it must be used with caution.
You may get "Page loading canceled" type of errors in Internet Explorer, even in the most recent versions. This is because an AJAX response/json include contains something that it shouldn't contain, because of the excess line endings in some PHP files, just as I've encountered a few days ago.
If you have some file downloads in your app, they can break too, because of this. And you may not notice it, even after years, since the specific breaking habit of a download depends on the server, the browser, the type and content of the file (and possibly some other factors I don't want to bore you with).
Finally, many PHP frameworks including Symfony, Zend and Laravel (there is no mention of this in the coding guidelines but it follows the suit) and the PSR-2 standard (item 2.2) require omission of the closing tag. PHP manual itself (1,2), Wordpress, Drupal and many other PHP software I guess, advise to do so. If you simply make a habit of following the standard (and setup PHP-CS-Fixer for your code) you can forget the issue. Otherwise you will always need to keep the issue in your mind.
Bonus: a few gotchas (actually currently one) related to these 2 characters:
?>
. An example is Smarty, even the most recent versions of both 2.* and 3.* branch have this. So, as always, watch for third party code. Bonus in bonus: A regex for deleting needless PHP endings: replace (\s*\?>\s*)$
with empty text in all files that contain PHP code.The issue is fixed by adding repository url under distributionManagement tab in main pom.xml.
Jenkin maven goal : clean deploy -U -Dmaven.test.skip=true
<distributionManagement>
<repository>
<id>releases</id>
<url>http://domain:port/content/repositories/releases</url>
</repository>
<snapshotRepository>
<id>snapshots</id>
<url>http://domain:port/content/repositories/snapshots</url>
</snapshotRepository>
</distributionManagement>
Here is one way to calculate log return using .shift()
. And the result is similar to but not the same as the gross return calculated by pct_change()
. Can you upload a copy of your sample data (dropbox share link) to reproduce the inconsistency you saw?
import pandas as pd
import numpy as np
np.random.seed(0)
df = pd.DataFrame(100 + np.random.randn(100).cumsum(), columns=['price'])
df['pct_change'] = df.price.pct_change()
df['log_ret'] = np.log(df.price) - np.log(df.price.shift(1))
Out[56]:
price pct_change log_ret
0 101.7641 NaN NaN
1 102.1642 0.0039 0.0039
2 103.1429 0.0096 0.0095
3 105.3838 0.0217 0.0215
4 107.2514 0.0177 0.0176
5 106.2741 -0.0091 -0.0092
6 107.2242 0.0089 0.0089
7 107.0729 -0.0014 -0.0014
.. ... ... ...
92 101.6160 0.0021 0.0021
93 102.5926 0.0096 0.0096
94 102.9490 0.0035 0.0035
95 103.6555 0.0069 0.0068
96 103.6660 0.0001 0.0001
97 105.4519 0.0172 0.0171
98 105.5788 0.0012 0.0012
99 105.9808 0.0038 0.0038
[100 rows x 3 columns]
You will find the application folder at:
/data/data/"your package name"
you can access this folder using the DDMS for your Emulator. you can't access this location on a real device unless you have a rooted device.
For me the problem was solved by stocking my datas into an object (here "datas").
NgApp.controller('MyController', function($scope) {_x000D_
_x000D_
$scope.my_title = ""; // This don't work in ng-click function called_x000D_
_x000D_
$scope.datas = {_x000D_
'my_title' : "",_x000D_
};_x000D_
_x000D_
$scope.doAction = function() {_x000D_
console.log($scope.my_title); // bad value_x000D_
console.log($scope.datas.my_title); // Good Value binded by'ng-model'_x000D_
}_x000D_
_x000D_
_x000D_
});
_x000D_
I Hop it will help
You can update progress bar only from ProgressChanged
or RunWorkerCompleted
event handlers as these are synchronized with the UI thread.
The basic idea is. Thread.Sleep
just simulates some work here. Replace it with your real routing call.
public Form1()
{
InitializeComponent();
backgroundWorker1.DoWork += backgroundWorker1_DoWork;
backgroundWorker1.ProgressChanged += backgroundWorker1_ProgressChanged;
backgroundWorker1.WorkerReportsProgress = true;
}
private void button1_Click(object sender, EventArgs e)
{
backgroundWorker1.RunWorkerAsync();
}
private void backgroundWorker1_DoWork(object sender, System.ComponentModel.DoWorkEventArgs e)
{
for (int i = 0; i < 100; i++)
{
Thread.Sleep(1000);
backgroundWorker1.ReportProgress(i);
}
}
private void backgroundWorker1_ProgressChanged(object sender, System.ComponentModel.ProgressChangedEventArgs e)
{
progressBar1.Value = e.ProgressPercentage;
}
document.onkeypress = function (e) {
e = e || window.event;
var charCode = (typeof e.which == "number") ? e.which : e.keyCode;
if (charCode == 13) {
// Do something here
printResult();
}
};
Heres my two cents. I am working on an app for Windows 8 and want the button to register a click event when I press the Enter button. I am doing this in JS. I tried a couple of suggestions, but had issues. This works just fine.
If you are using the Spring Boot Maven Plugin, run:
mvn spring-boot:run -Dspring-boot.run.profiles=foo,bar
(https://docs.spring.io/spring-boot/docs/current/maven-plugin/examples/run-profiles.html)
You can loop the array with a for loop and the object properties with for-in loops.
for (var i=0; i<result.length; i++)
for (var name in result[i]) {
console.log("Item name: "+name);
console.log("Source: "+result[i][name].sourceUuid);
console.log("Target: "+result[i][name].targetUuid);
}
You can achieve 2 way data-binding in Nuxt/Vue like this:
Child.vue
<template>
<input
v-model="content"
<!-- How you choose to emit the event is up to you could be @keydown or even inside a watch prop -->
@keyup="$emit('update:dataFromParent', content)"
/>
</template>
<script>
export default {
props: ["dataFromParent"],
mounted() {
this.content = this.dataFromParent;
},
data: () => ({
content: "",
}),
};
</script>
Parent.vue
<tenplate>
<Child :dataFromParent.sync="text" />
</template>
<script>
import Child from "~/components/Child";
export default {
components: {
Child,
},
data: () => ({
text: "Hello World!" ,
}),
};
</script>
Steps are below:
In package.json add:
"bin":{
"script1": "bin/script1.js"
}
Create a bin
folder in the project directory and add file runScript1.js
with the code:
#! /usr/bin/env node
var shell = require("shelljs");
shell.exec("node step1script.js");
Run npm install shelljs
in terminal
Run npm link
in terminal
From terminal you can now run script1
which will run node script1.js
Reference: http://blog.npmjs.org/post/118810260230/building-a-simple-command-line-tool-with-npm
There is no such thing as a silver bullet.
A single metric like that is useless by itself.
For instance, I have my own class library. Currently, the following statistics are true:
Total lines: 252.682
Code lines: 127.323
Comments: 99.538
Empty lines: 25.821
Let's assume I don't write any comments at all, that is, 127.323 lines of code. With your ratio, that code library would take me around 10610 days to write. That's 29 years.
I certainly didn't spend 29 years writing that code, since it's all C#, and C# hasn't been around that long.
Now, you can argue that the code isn't all that good, since obviously I must've surpassed your 12 lines a day metric, and yes, I'll agree to that, but if I'm to bring the timeline down to when 1.0 was released (and I didn't start actually making it until 2.0 was released), which is 2002-02-13, about 2600 days, the average is 48 lines of code a day.
All of those lines of code are good? Heck no. But down to 12 lines of code a day?
Heck no.
Everything depends.
You can have a top notch programmer churning out code in the order of thousands of lines a day, and a medium programmer churning out code in the order of hundreds of lines a day, and the quality is the same.
And yes, there will be bugs.
The total you want is the balance. Amount of code changed, versus the number of bugs found, versus the complexity of the code, versus the hardship of fixing those bugs.
In my scenario, I want to update the status of status based on his id
student_obj = StudentStatus.objects.get(student_id=101)
student_obj.status= 'Enrolled'
student_obj.save()
Or If you want the last id from Student_Info table you can use the following.
student_obj = StudentStatus.objects.get(student_id=StudentInfo.objects.last().id)
student_obj.status= 'Enrolled'
student_obj.save()
You can use optional parameters in C# 4.0 without any worries. If we have a method like:
int MyMetod(int param1, int param2, int param3=10, int param4=20){....}
when you call the method, you can skip parameters like this:
int variab = MyMethod(param3:50; param1:10);
C# 4.0 implements a feature called "named parameters", you can actually pass parameters by their names, and of course you can pass parameters in whatever order you want :)
I had the same problem and I solved in a slightly different way from the others. I am using angular 1.4.4.
In my case, I have a shell template that creates a CSS Bootstrap panel:
<div class="class-container panel panel-info">
<div class="panel-heading">
<h3 class="panel-title">{{title}} </h3>
</div>
<div class="panel-body">
<sp-panel-body panelbodytpl="{{panelbodytpl}}"></sp-panel-body>
</div>
</div>
I want to include panel body templates depending on the route.
angular.module('MyApp')
.directive('spPanelBody', ['$compile', function($compile){
return {
restrict : 'E',
scope : true,
link: function (scope, element, attrs) {
scope.data = angular.fromJson(scope.data);
element.append($compile('<ng-include src="\'' + scope.panelbodytpl + '\'"></ng-include>')(scope));
}
}
}]);
I then have the following template included when the route is #/students
:
<div class="students-wrapper">
<div ng-controller="StudentsIndexController as studentCtrl" class="row">
<div ng-repeat="student in studentCtrl.students" class="col-sm-6 col-md-4 col-lg-3">
<sp-panel
title="{{student.firstName}} {{student.middleName}} {{student.lastName}}"
panelbodytpl="{{'/student/panel-body.html'}}"
data="{{student}}"
></sp-panel>
</div>
</div>
</div>
The panel-body.html template as follows:
Date of Birth: {{data.dob * 1000 | date : 'dd MMM yyyy'}}
Sample data in the case someone wants to have a go:
var student = {
'id' : 1,
'firstName' : 'John',
'middleName' : '',
'lastName' : 'Smith',
'dob' : 1130799600,
'current-class' : 5
}
A small addendum: you do not have to create your own name for the key, android provides these, f.ex. Intent.EXTRA_TEXT
. Modifying the accepted answer:
Intent i = new Intent(FirstScreen.this, SecondScreen.class); String strName = null; i.putExtra(Intent.EXTRA_TEXT, strName);
Then, to retrieve the value try something like:
String newString; Bundle extras = getIntent().getExtras(); if(extras == null) { newString= null; } else { newString= extras.getString(Intent.EXTRA_TEXT); }
I'd be careful about trying to get too clever here. I think it's confusing as it is and using more advanced nth-child
parameters will only make it more complicated. As for the background color I'd just set that to a variable.
Here goes what I came up with before I realized trying to be too clever might be a bad thing.
#romtest {
$bg: #e5e5e5;
.detailed {
th {
&:nth-child(-2n+6) {
background-color: $bg;
}
}
td {
&:nth-child(3n), &:nth-child(2), &:nth-child(7) {
background-color: $bg;
}
&.last {
&:nth-child(-2n+4){
background-color: $bg;
}
}
}
}
}
and here is a quick demo: http://codepen.io/anon/pen/BEImD
----EDIT----
Here's another approach to avoid retyping background-color
:
#romtest {
%highlight {
background-color: #e5e5e5;
}
.detailed {
th {
&:nth-child(-2n+6) {
@extend %highlight;
}
}
td {
&:nth-child(3n), &:nth-child(2), &:nth-child(7) {
@extend %highlight;
}
&.last {
&:nth-child(-2n+4){
@extend %highlight;
}
}
}
}
}
Google recommend that you don't use any of them, source.
There is no need to use entity references like
&mdash
,&rdquo
, or☺
, assuming the same encoding (UTF-8) is used for files and editors as well as among teams.
Is there a reason you can't simply use "
?
No such thing, sorry.
Though the spec states:
A future version of the 2D context API may provide a way to render fragments of documents, rendered using CSS, straight to the canvas.
Which may be as close as you'll get.
A lot of people want a ctx.drawArbitraryHTML/Element
kind of deal but there's nothing built in like that.
The only exception is Mozilla's exclusive drawWindow
, which draws a snapshot of the contents of a DOM window into the canvas. This feature is only available for code running with Chrome ("local only") privileges. It is not allowed in normal HTML pages. So you can use it for writing FireFox extensions like this one does but that's it.
I believe referencing this.state
inside of setState()
is discouraged (State Updates May Be Asynchronous).
The docs recommend using setState()
with a callback function so that prevState is passed in at runtime when the update occurs. So this is how it would look:
Using Array.prototype.filter without ES6
removeItem : function(index) {
this.setState(function(prevState){
return { data : prevState.data.filter(function(val, i) {
return i !== index;
})};
});
}
Using Array.prototype.filter with ES6 Arrow Functions
removeItem(index) {
this.setState((prevState) => ({
data: prevState.data.filter((_, i) => i !== index)
}));
}
Using immutability-helper
import update from 'immutability-helper'
...
removeItem(index) {
this.setState((prevState) => ({
data: update(prevState.data, {$splice: [[index, 1]]})
}))
}
Using Spread
function removeItem(index) {
this.setState((prevState) => ({
data: [...prevState.data.slice(0,index), ...prevState.data.slice(index+1)]
}))
}
Note that in each instance, regardless of the technique used, this.setState()
is passed a callback, not an object reference to the old this.state
;
POSIX compliant readlink -f
implementation for POSIX shell scripts
https://github.com/ko1nksm/readlinkf
This is POSIX compliant (no bashism). It uses neither readlink
nor realpath
. I have verified that it is exactly the same by comparing with GNU readlink -f
(see test results). It has error handling and good performance. You can safely replace from readlink -f
. The license is CC0, so you can use it for any project.
This code is adopted in the bats-core project.
# POSIX compliant version
readlinkf_posix() {
[ "${1:-}" ] || return 1
max_symlinks=40
CDPATH='' # to avoid changing to an unexpected directory
target=$1
[ -e "${target%/}" ] || target=${1%"${1##*[!/]}"} # trim trailing slashes
[ -d "${target:-/}" ] && target="$target/"
cd -P . 2>/dev/null || return 1
while [ "$max_symlinks" -ge 0 ] && max_symlinks=$((max_symlinks - 1)); do
if [ ! "$target" = "${target%/*}" ]; then
case $target in
/*) cd -P "${target%/*}/" 2>/dev/null || break ;;
*) cd -P "./${target%/*}" 2>/dev/null || break ;;
esac
target=${target##*/}
fi
if [ ! -L "$target" ]; then
target="${PWD%/}${target:+/}${target}"
printf '%s\n' "${target:-/}"
return 0
fi
# `ls -dl` format: "%s %u %s %s %u %s %s -> %s\n",
# <file mode>, <number of links>, <owner name>, <group name>,
# <size>, <date and time>, <pathname of link>, <contents of link>
# https://pubs.opengroup.org/onlinepubs/9699919799/utilities/ls.html
link=$(ls -dl -- "$target" 2>/dev/null) || break
target=${link#*" $target -> "}
done
return 1
}
Please refer to the latest code. It may some fixed.
Have a look at the Heleonix.Reflection library. You can get/set/invoke members by paths, or create a getter/setter (lambda compiled into a delegate) which is faster than reflection. For example:
var success = Reflector.Get(DateTime.Now, null, "Date.Year", out int value);
Or create a getter once and cache for reuse (this is more performant but might throw NullReferenceException if an intermediate member is null):
var getter = Reflector.CreateGetter<DateTime, int>("Date.Year", typeof(DateTime));
getter(DateTime.Now);
Or if you want to create a List<Action<object, object>>
of different getters, just specify base types for compiled delegates (type conversions will be added into compiled lambdas):
var getter = Reflector.CreateGetter<object, object>("Date.Year", typeof(DateTime));
getter(DateTime.Now);
i mostly found a easy way to execute the length of array inside a loop just like that
int array[] = {10, 20, 30, 40};
int i;
for (i = 0; i < array[i]; i++) {
printf("%d\n", array[i]);
}
If you are using react-router-dom
and material-ui
you can use ...
import { Link } from 'react-router-dom'
import Button from '@material-ui/core/Button';
<Button component={Link} to="/open-collective">
Link
</Button>
You can read more here.
I would prefer this code:
function checkVariable() {
if (variableLoaded == true) {
// Here is your next action
}
}
setTimeout(checkVariable, 1000);
This is what I used to start and stop tomcat 7.0.29, using ant 1.8.2. Works fine for me, but leaves the control in the started server window. I have not tried it yet, but I think if I change the "/K" in the startup sequence to "/C", it may not even do that.
<target name="tomcat-stop">
<exec dir="${appserver.home}/bin" executable="cmd">
<arg line="/C start cmd.exe /C shutdown.bat"/>
</exec>
</target>
<target name="tomcat-start" depends="tomcat-stop" >
<exec dir="${appserver.home}/bin" executable="cmd">
<arg line="/K start cmd.exe /C startup.bat"/>
</exec>
</target>
A simple "Clean" (Shift(?)+Command(?)+K) solved to me
Like this:
std::string s("Test string");
std::string::iterator it = s.begin();
//Use the iterator...
++it;
//...
std::cout << "index is: " << std::distance(s.begin(), it) << std::endl;
for (i = 0; i < 16; i++)
{
fscanf(myFile, "%d", &numberArray[i]);
}
This is attempting to read the whole string, "5623125698541159"
into &numArray[0]
. You need spaces between the numbers:
5 6 2 3 ...
simply write:-
select convert (date,DATEADD(YEAR,DATEDIFF(YEAR,0,GETDATE()),0))
start date of the year.
select convert (date,DATEADD(YEAR, DATEDIFF(YEAR,0,GETDATE()) + 1, -1))
For an example data in your table such as combinations of
''
, null
and as well as actual value
than if you want to only actual value
and replace to ''
and null
value by #
symbol than execute this query
SELECT Column_Name = (CASE WHEN (Column_Name IS NULL OR Column_Name = '') THEN '#' ELSE Column_Name END) FROM Table_Name
and another way you can use it but this is little bit lengthy and instead of this you can also use IsNull
function but here only i am mentioning IIF
function
SELECT IIF(Column_Name IS NULL, '#', Column_Name) FROM Table_Name
SELECT IIF(Column_Name = '', '#', Column_Name) FROM Table_Name
-- and syntax of this query
SELECT IIF(Column_Name IS NULL, 'True Value', 'False Value') FROM Table_Name
You should make your TextView
request focus:
mTextView.requestFocus();
if you're developing flutter packages, please add package param after image path like this:
AssetImage('images/heart.png', package: 'my_icons') // my_icons is your plugin name, in flutter plugin is also a package.
Here is the link from flutter docs https://flutter.dev/assets-and-images/#from-packages
I had the same error when working with Groupie.
implementation 'com.xwray:groupie:2.3.0'
I solved it by changing version to implementation 'com.xwray:groupie:2.1.0'
#!/usr/bin/env python
import tkinter as tk
class AppName(tk.Frame):
def __init__(self, master=None):
tk.Frame.__init__(self, master)
self.grid()
self.createWidgets()
def createWidgets(self):
self.quitButton = tk.Button(self, text='Quit', command=self.quit)
self.quitButton.grid()
app = AppName()
app.master.title('Title here ...!')
app.master.iconbitmap('icon.ico')
app.mainloop()
it should work like this !
Upon installation, the Android SDK generates a debug
signing certificate for you in a keystore called debug.keystore
. The Eclipse plug-in uses this certificate to sign each application build that is generated.
Unfortunately a debug certificate is only valid for 365 days. To generate a new one you must delete the existing debug.keystore
file. Its location is platform dependent - you can find it in Preferences - Android - Build - Default debug keystore.
Had the same Issue when i decided to install another version of Android Studio, what worked for me was:
classpath 'com.android.tools.build:gradle:3.5.0-rc01'
Copied that line and replaced it on the project i was working on.
I'm surprised there's been no mention of filter_var here for this being such an old question...
PHP has a built in method of doing this using sanitization filters. Specifically, the one to use in this situation is FILTER_SANITIZE_NUMBER_FLOAT
with the FILTER_FLAG_ALLOW_FRACTION | FILTER_FLAG_ALLOW_THOUSAND
flags. Like so:
$numeric_filtered = filter_var("AR3,373.31", FILTER_SANITIZE_NUMBER_FLOAT,
FILTER_FLAG_ALLOW_FRACTION | FILTER_FLAG_ALLOW_THOUSAND);
echo $numeric_filtered; // Will print "3,373.31"
It might also be worthwhile to note that because it's built-in to PHP, it's slightly faster than using regex with PHP's current libraries (albeit literally in nanoseconds).
It is possible to turn the string into a stream by using the std::stringstream
class (its constructor takes a string as parameter). Once it's built, you can use the >>
operator on it (like on regular file based streams), which will extract, or tokenize word from it:
#include <iostream>
#include <sstream>
using namespace std;
int main(){
string line = "test one two three.";
string arr[4];
int i = 0;
stringstream ssin(line);
while (ssin.good() && i < 4){
ssin >> arr[i];
++i;
}
for(i = 0; i < 4; i++){
cout << arr[i] << endl;
}
}
I also had this problem several times and I could 'solve' it by just deleting the messages in the "Problems"-tab and building the project again. Select the project and click on the menu bar Project -> Clean...
select your project again and okay.
Without explicitly providing the type as in command.Parameters.Add("@ID", SqlDbType.Int);
, it will try to implicitly convert the input to what it is expecting.
The downside of this, is that the implicit conversion may not be the most optimal of conversions and may cause a performance hit.
There is a discussion about this very topic here: http://forums.asp.net/t/1200255.aspx/1
Have you looked at the samples provided with EPPlus?
This one shows you how to create a file http://epplus.codeplex.com/wikipage?title=ContentSheetExample
This one shows you how to use it to stream back a file http://epplus.codeplex.com/wikipage?title=WebapplicationExample
This is how we use the package to generate a file.
var newFile = new FileInfo(ExportFileName);
using (ExcelPackage xlPackage = new ExcelPackage(newFile))
{
// do work here
xlPackage.Save();
}
At the top of your text editor, you should have a dropdown that lists all the methods, properties etc in the current type; and it's clickable (even if those members are defined in other files - in which case they're greyed out but you can still navigate with them).
Also, if you use the Class Explorer (Ctrl+Alt+C) to navigate your project, then you'll get a full overview of all your types. However, there doesn't appear to be a setting in Tools/Options that allows you to track the active type in that window (there is for the solution explorer) - perhaps a macro or addin is in order...
use a trigges it will work:-
->CREATE TRIGGER trigger_name BEFORE INSERT ON table_name
FOR EACH ROW SET NEW.column_name3 = NEW.column_name1 + NEW.column_name2;
this will only work only when you will insert a row in table not when you will be updating your table for such a pupose create another trigger of different name and use UPDATE on the place of INSERT in the above syntax
The OP asks about detatching matplotlib
plots. Most answers assume command execution from within a python interpreter. The use-case presented here is my preference for testing code in a terminal (e.g. bash) where a file.py
is run and you want the plot(s) to come up but the python script to complete and return to a command prompt.
This stand-alone file uses multiprocessing
to launch a separate process for plotting data with matplotlib
. The main thread exits using the os._exit(1)
mentioned in this post. The os._exit()
forces main to exit but leaves the matplotlib
child process alive and responsive until the plot window is closed. It's a separate process entirely.
This approach is a bit like a Matlab development session with figure windows that come up with a responsive command prompt. With this approach, you have lost all contact with the figure window process, but, that's ok for development and debugging. Just close the window and keep testing.
multiprocessing
is designed for python-only code execution which makes it perhaps better suited than subprocess
. multiprocessing
is cross-platform so this should work well in Windows or Mac with little or no adjustment. There is no need to check the underlying operating system. This was tested on linux, Ubuntu 18.04LTS.
#!/usr/bin/python3
import time
import multiprocessing
import os
def plot_graph(data):
from matplotlib.pyplot import plot, draw, show
print("entered plot_graph()")
plot(data)
show() # this will block and remain a viable process as long as the figure window is open
print("exiting plot_graph() process")
if __name__ == "__main__":
print("starting __main__")
multiprocessing.Process(target=plot_graph, args=([1, 2, 3],)).start()
time.sleep(5)
print("exiting main")
os._exit(0) # this exits immediately with no cleanup or buffer flushing
Running file.py
brings up a figure window, then __main__
exits but the multiprocessing
+ matplotlib
figure window remains responsive with zoom, pan, and other buttons because it is an independent process.
Check the processes at the bash command prompt with:
ps ax|grep -v grep |grep file.py
May be this post (Secure Metro JAX-WS UsernameToken Web Service with Signature, Encryption and TLS (SSL)) provides more insight. As they mentioned "Remember, unless password text or digested password is sent on a secured channel or the token is encrypted, neither password digest nor cleartext password offers no real additional security. "
step 1. select * from <tablename>;
step 2. just right click on your output(t.e data) then go to last option export it will give u some extension then click on your required extension then apply u will get new file including data.
mysql_fetch_array()
expects parameter 1 to be resource boolean given in php error on server if you get this error : please select all privileges on your server
. u will get the answer..
As of 2020, the most reliable password hashing algorithm in use, most likely to optimise its strength given any hardware, is Argon2id or Argon2i but not its Spring implementation.
The PBKDF2 standard includes the the CPU-greedy/computationally-expensive feature of the block cipher BCRYPT algo, and add its stream cipher capability. PBKDF2 was overwhelmed by the memory exponentially-greedy SCRYPT then by the side-channel-attack-resistant Argon2
Argon2 provides the necessary calibration tool to find optimized strength parameters given a target hashing time and the hardware used.
Memory greedy hashing would help against GPU use for cracking.
Spring security/Bouncy Castle implementation is not optimized and relatively week given what attacker could use. cf: Spring doc Argon2 and Scrypt
The currently implementation uses Bouncy castle which does not exploit parallelism/optimizations that password crackers will, so there is an unnecessary asymmetry between attacker and defender.
The most credible implementation in use for java is mkammerer's one,
a wrapper jar/library of the official native implementation written in C.
It is well written and simple to use.
The embedded version provides native builds for Linux, windows and OSX.
As an example, it is used by jpmorganchase in its tessera security project used to secure Quorum, its Ethereum cryptocurency implementation.
Here is an example:
final char[] password = "a4e9y2tr0ngAnd7on6P১M°RD".toCharArray();
byte[] salt = new byte[128];
new SecureRandom().nextBytes(salt);
final Argon2Advanced argon2 = Argon2Factory.createAdvanced(Argon2Factory.Argon2Types.ARGON2id);
byte[] hash = argon2.rawHash(10, 1048576, 4, password, salt);
(see tessera)
Declare the lib in your POM:
<dependency>
<groupId>de.mkammerer</groupId>
<artifactId>argon2-jvm</artifactId>
<version>2.7</version>
</dependency>
or with gradle:
compile 'de.mkammerer:argon2-jvm:2.7'
Calibration may be performed using de.mkammerer.argon2.Argon2Helper#findIterations
SCRYPT and Pbkdf2 algorithm might also be calibrated by writing some simple benchmark, but current minimal safe iterations values, will require higher hashing times.
Calendar currentTime = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
currentTime.set(Calendar.ZONE_OFFSET, TimeZone.getTimeZone("UTC").getRawOffset());
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.HOUR_OF_DAY, currentTime.get(Calendar.HOUR_OF_DAY));
calendar.getTimeInMillis()
is working for me
According to the documentation: https://jinja.palletsprojects.com/en/2.10.x/templates/#line-statements you may use multi-line statements as long as the code has parens/brackets around it. Example:
{% if ( (foo == 'foo' or bar == 'bar') and
(fooo == 'fooo' or baar == 'baar') ) %}
<li>some text</li>
{% endif %}
Edit: Using line_statement_prefix = '#'
* the code would look like this:
# if ( (foo == 'foo' or bar == 'bar') and
(fooo == 'fooo' or baar == 'baar') )
<li>some text</li>
# endif
*Here's an example of how you'd specify the line_statement_prefix
in the Environment
:
from jinja2 import Environment, PackageLoader, select_autoescape
env = Environment(
loader=PackageLoader('yourapplication', 'templates'),
autoescape=select_autoescape(['html', 'xml']),
line_statement_prefix='#'
)
Or using Flask:
from flask import Flask
app = Flask(__name__, instance_relative_config=True, static_folder='static')
app.jinja_env.filters['zip'] = zip
app.jinja_env.line_statement_prefix = '#'
You can follow this official documentation by Google: https://developer.android.com/studio/build/application-id.html
Application ID should be changed in Build.gradle, while package name can be changed in AndroidManifest.xml.
However one should be careful changing package name.
Also while re uploading the app, one should be careful since it matches the application ID of previously uploaded app with new upload.
Refer to following links:
You cannot pass more than three arguments, if you want to pass only 1 argument then use void for the other two arguments.
1. private class DownloadFilesTask extends AsyncTask<URL, Integer, Long>
2. protected class InitTask extends AsyncTask<Context, Integer, Integer>
An asynchronous task is defined by a computation that runs on a background thread and whose result is published on the UI thread. An asynchronous task is defined by 3 generic types, called Params, Progress and Result, and 4 steps, called onPreExecute, doInBackground, onProgressUpdate and onPostExecute.
KPBird
The simplest way to read a cookie I can think is using Regexp like this:
**Replace COOKIE_NAME
with the name of your cookie.
document.cookie.match(/COOKIE_NAME=([^;]*);/)[1]
How does it work?
Cookies are stored in document.cookie
like this: cookieName=cookieValue;cookieName2=cookieValue2;.....
The regex searches the whole cookie string for literaly "COOKIE_NAME="
and captures anything after it that is not a semicolon until it actually finds a semicolon;
Then we use [1]
to get the second item from array, which is the captured group.
For Unescape You can simply use this functions:
System.Text.RegularExpressions.Regex.Unescape(string)
System.Uri.UnescapeDataString(string)
I suggest using this method (It works better with UTF-8):
UnescapeDataString(string)
Execute the command in this format
ALTER TABLE tablename ALTER COLUMN columnname SET NOT NULL;
for setting the column to not null.
Sometimes you want to get rid of those settings kept in the traditional web.config or app.config file. You want more fine grained control over the deployment of your settings entries and separated data design. Or the requirement is to enable adding new entries at runtime.
I can imagine two good options:
The advantage of the strongly typed version are the strongly typed settings names and values. There is no risk of intermixing names or data types. The disadvantage is that more settings have to be coded, cannot be added at runtime.
With the object oriented version the advantage is that new settings can be added at runtime. But you do not have strongly typed names and values. Must be careful with string identifiers. Must know data type saved earlier when getting a value.
You can find the code of both fully functional implementations HERE.
If you are using NumPy arrays, shape can be used. For example
>>> a = numpy.array([[[1,2,3],[1,2,3]],[[12,3,4],[2,1,3]]])
>>> a
array([[[ 1, 2, 3],
[ 1, 2, 3]],
[[12, 3, 4],
[ 2, 1, 3]]])
>>> a.shape
(2, 2, 3)
If you'd like to add text at the end of each line in-place (in the same file), you can use -i
parameter, for example:
sed -i'.bak' 's/$/:80/' foo.txt
However -i
option is non-standard Unix extension and may not be available on all operating systems.
So you can consider using ex
(which is equivalent to vi -e
/vim -e
):
ex +"%s/$/:80/g" -cwq foo.txt
which will add :80
to each line, but sometimes it can append it to blank lines.
So better method is to check if the line actually contain any number, and then append it, for example:
ex +"g/[0-9]/s/$/:80/g" -cwq foo.txt
If the file has more complex format, consider using proper regex, instead of [0-9]
.
var index = ctx.Items.FirstOrDefault(item => Equals(item.Value, Settings.Default.Format_Encoding));
ctx.SelectedIndex = ctx.Items.IndexOf(index);
OR
foreach (var listItem in ctx.Items)
listItem.Selected = Equals(listItem.Value as Encoding, Settings.Default.Format_Encoding);
Should work.. especially when using extended RAD controls in which FindByText/Value doesn't even exist!
Console.WriteLine(curr.ToString("HH:mm"));
I don't think you can set that option there. You will have to use jQuery.ajax() with the appropriate parameters (basically getJSON just wraps that call into an easier API, as well).
Building on Alexei's comment. This should work for DST too.
import time
import datetime
def utc_to_local(dt):
if time.localtime().tm_isdst:
return dt - datetime.timedelta(seconds = time.altzone)
else:
return dt - datetime.timedelta(seconds = time.timezone)
There is an RFC which covers it and says to use text/csv
.
This RFC updates RFC 4180.
Recently I discovered an explicit mimetype for Excel application/vnd.ms-excel. It was registered with IANA in '96. Note the concerns raised about being at the mercy of the sender and having your machine violated.
Media Type: application/vnd.ms-excel
Name Microsoft Excel (tm)
Required parameters: None
Optional parameters: name
Encoding considerations: base64 preferred
Security considerations: As with most application types this data is intended for interpretation by a program that understands the data on the recipient's system. Recipients need to understand that they are at the "mercy" of the sender, when receiving this type of data, since data will be executed on their system, and the security of their machines can be violated.
OID { org-id ms-files(4) ms-excel (3) }
Object type spreadsheet
Comments This Media Type/OID is used to identify Microsoft Excel generically (i.e., independent of version, subtype, or platform format).
I wasn't aware that vendor extensions were allowed. Check out this answer to find out more - thanks starbeamrainbowlabs for the reference.
Using the std::bitset answers and convenience templates:
#include <iostream>
#include <bitset>
#include <climits>
template<typename T>
struct BinaryForm {
BinaryForm(const T& v) : _bs(v) {}
const std::bitset<sizeof(T)*CHAR_BIT> _bs;
};
template<typename T>
inline std::ostream& operator<<(std::ostream& os, const BinaryForm<T> bf) {
return os << bf._bs;
}
Using it like this:
auto c = 'A';
std::cout << "c: " << c << " binary: " << BinaryForm{c} << std::endl;
unsigned x = 1234;
std::cout << "x: " << x << " binary: " << BinaryForm{x} << std::endl;
int64_t z { -1024 };
std::cout << "z: " << << " binary: " << BinaryForm{z} << std::endl;
Generates output:
c: A binary: 01000001
x: 1234 binary: 00000000000000000000010011010010
z: -1024 binary: 1111111111111111111111111111111111111111111111111111110000000000
Adding import android.support.v7.widget.Toolbar to the import list resolve this issue.
Then add the toolbar widget layout file:
<android.support.v7.widget.Toolbar
android:id="@+id/list_toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="?attr/colorPrimary"
android:minHeight="?attr/actionBarSize"
android:theme="?attr/actionBarTheme"
/>
In onCreate method of java code
//call to
Tootbar toolbar = findViewById(R.id.toolbar); setSupportActionBar(toolbar);
Source: https://developer.android.com/training/appbar/up-action
here is the solution for similar problem which i was facing while extracting name from user profile facebook json object
$uname=json_encode($userprof);
$uname=json_decode($uname);
echo "Welcome " . $uname -> name ;
(but not really...)
HTML 5's <video>
tag is protocol agnostic—it does not care. You place the protocol in the src
attribute as part of the URL. E.g.:
<video src="rtp://myserver.com/path/to/stream">
Your browser does not support the VIDEO tag and/or RTP streams.
</video>
or maybe
<video src="http://myserver.com:1935/path/to/stream/myPlaylist.m3u8">
Your browser does not support the VIDEO tag and/or RTP streams.
</video>
That said, the implementation of the <video>
tag is browser specific. Since it is early days for HTML 5, I expect frequently changing support (or lack of support).
From the W3C's HTML5 spec (The video element):
User agents may support any video and audio codecs and container formats
Enable TLs 1.2 from IE and add the following
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
There's a simple JavaScript tri-state input field implementation at https://github.com/supernifty/tristate-checkbox
Using ToString("HH:mm")
certainly gives you what you want as a string.
If you want the current hour/minute as numbers, string manipulation isn't necessary; you can use the TimeOfDay
property:
TimeSpan timeOfDay = fechaHora.TimeOfDay;
int hour = timeOfDay.Hours;
int minute = timeOfDay.Minutes;
We can mock list properly for foreach loop. Please find below code snippet and explanation.
This is my actual class method where I want to create test case by mocking list.
this.nameList
is a list object.
public void setOptions(){
// ....
for (String str : this.nameList) {
str = "-"+str;
}
// ....
}
The foreach loop internally works on iterator, so here we crated mock of iterator.
Mockito framework has facility to return pair of values on particular method call by using Mockito.when().thenReturn()
, i.e. on hasNext()
we pass 1st true and on second call false, so that our loop will continue only two times. On next()
we just return actual return value.
@Test
public void testSetOptions(){
// ...
Iterator<SampleFilter> itr = Mockito.mock(Iterator.class);
Mockito.when(itr.hasNext()).thenReturn(true, false);
Mockito.when(itr.next()).thenReturn(Mockito.any(String.class);
List mockNameList = Mockito.mock(List.class);
Mockito.when(mockNameList.iterator()).thenReturn(itr);
// ...
}
In this way we can avoid sending actual list to test by using mock of list.
If you want to use FragmentStatePagerAdapter, please take a look at https://code.google.com/p/android/issues/detail?can=2&start=0&num=100&q=&colspec=ID%20Type%20Status%20Owner%20Summary%20Stars&groupby=&sort=&id=37990. There are issues with FragmentStatePagerAdapter that may or may not trouble your use case.
Also, link has few solutions too..few may suit to your requirement.
If like me you have seen this message while trying to add 'www' as a subdomain inorder to get your own domain working:
'Already used, please remove previous mapping first . '
The above process mentioned in other answers has changed slightly if you are using Google Apps for your domain.
You must now do this as well:
Google Apps -> Service Settings -> Sites. Click 'Web address mapping' and remove the 'www' mapping which has been added by default to Sites.
Then you can add the 'www' subdomain for your App engine app
see this link:
http://groups.google.com/group/google-appengine/web/deleting-existing-www-mapping-from-google-apps
func funcationname()
{
var parameters = [String:String]()
let apiToken = "Bearer \(UserDefaults.standard.string(forKey: "vAuthToken")!)"
let headers = ["Vauthtoken":apiToken]
let mobile = "\(ApiUtillity.sharedInstance.getUserData(key: "mobile"))"
parameters = ["first_name":First_name,"last_name":last_name,"email":Email,"mobile_no":mobile]
print(parameters)
ApiUtillity.sharedInstance.showSVProgressHUD(text: "Loading...")
let URL1 = ApiUtillity.sharedInstance.API(Join: "user/update_profile")
let url = URL(string: URL1.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed)!)
var urlRequest = URLRequest(url: url!)
urlRequest.httpMethod = "POST"
urlRequest.allHTTPHeaderFields = headers
Alamofire.upload(multipartFormData: { (multipartFormData) in
multipartFormData.append(self.imageData_pf_pic, withName: "profile_image", fileName: "image.jpg", mimeType: "image/jpg")
for (key, value) in parameters {
multipartFormData.append((value as AnyObject).data(using: String.Encoding.utf8.rawValue)!, withName: key)
}
}, with: urlRequest) { (encodingResult) in
switch encodingResult {
case .success(let upload, _, _):
upload.responseJSON { response in
if let JSON = response.result.value {
print("JSON: \(JSON)")
let status = (JSON as AnyObject).value(forKey: "status") as! Int
let sts = Int(status)
if sts == 200
{
ApiUtillity.sharedInstance.dismissSVProgressHUD()
let UserData = ((JSON as AnyObject).value(forKey: "data") as! NSDictionary)
ApiUtillity.sharedInstance.setUserData(data: UserData)
}
else
{
ApiUtillity.sharedInstance.dismissSVProgressHUD()
let ErrorDic:NSDictionary = (JSON as AnyObject).value(forKey: "message") as! NSDictionary
let Errormobile_no = ErrorDic.value(forKey: "mobile_no") as? String
let Erroremail = ErrorDic.value(forKey: "email") as? String
if Errormobile_no?.count == nil
{}
else
{
ApiUtillity.sharedInstance.dismissSVProgressHUDWithError(error: Errormobile_no!)
}
if Erroremail?.count == nil
{}
else
{
ApiUtillity.sharedInstance.dismissSVProgressHUDWithError(error: Erroremail!)
}
}
}
}
case .failure(let encodingError):
ApiUtillity.sharedInstance.dismissSVProgressHUD()
print(encodingError)
}
}
}
For anyone else who runs into this...
Version 1.2.0 of this plugin (current as of this post) doesn't quite work in all cases as documented with Bootstrap 3.0, but it does with a minor workaround.
Specifically, if using an input with icon, the HTML markup is of course slightly different as class names have changed:
<div class="input-group" data-datepicker="true">
<input name="date" type="text" class="form-control" />
<span class="input-group-addon"><i class="icon-calendar"></i></span>
</div>
It seems because of this, you need to use a selector that points directly to the input element itself NOT the parent container (which is what the auto generated HTML on the demo page suggests).
$('*[data-datepicker="true"] input[type="text"]').datepicker({
todayBtn: true,
orientation: "top left",
autoclose: true,
todayHighlight: true
});
Having done this you will probably also want to add a listener for clicking/tapping on the icon so it sets focus on the text input when clicked (which is the behaviour when using this plugin with TB 2.x by default).
$(document).on('touch click', '*[data-datepicker="true"] .input-group-addon', function(e){
$('input[type="text"]', $(this).parent()).focus();
});
NB: I just use a data-datepicker boolean attribute because the class name 'datepicker' is reserved by the plugin and I already use 'date' for styling elements.
The other answer is correct, but for completeness, here are other ways:
List<SomeClass> list = mapper.readValue(jsonString, new TypeReference<List<SomeClass>>() { });
SomeClass[] array = mapper.readValue(jsonString, SomeClass[].class);
Adding comment for anyone using Plesk having issues with any of the above as it was driving me crazy, setting session.gc_maxlifetime from your PHP script wont work as Plesk has it's own garbage collection script run from cron.
I used the solution posted on the link below of moving the cron job from hourly to daily to avoid this issue, then the top answer above should work:
mv /etc/cron.hourly/plesk-php-cleanuper /etc/cron.daily/
https://websavers.ca/plesk-php-sessions-timing-earlier-expected
A #spacer
div must be placed between the header and main body, like this:
<header>
</header>
<div id="spacer"></div>
<main>
</main>
The header's position
will be fixed
, while the spacer will keep its default static
position:
header {position: fixed;}
Finally you need to make sure that both the header and spacer have the same size-related properties, like so:
header, #spacer {
height: 100px;
max-height: 35vh;
}
This works for me at least.
I found this solution online, and it addressed this pretty well. My only concern is looping through all the pivots and queries might become time consuming if there's a lot of them:
Sub RefreshTables()
Application.DisplayAlerts = False
Application.ScreenUpdating = False
Dim objList As ListObject
Dim ws As Worksheet
For Each ws In ActiveWorkbook.Worksheets
For Each objList In ws.ListObjects
If objList.SourceType = 3 Then
With objList.QueryTable
.BackgroundQuery = False
.Refresh
End With
End If
Next objList
Next ws
Call UpdateAllPivots
Application.ScreenUpdating = True
Application.DisplayAlerts = True
End Sub
Sub UpdateAllPivots()
Dim pt As PivotTable
Dim ws As Worksheet
For Each ws In ActiveWorkbook.Worksheets
For Each pt In ws.PivotTables
pt.RefreshTable
Next pt
Next ws
End Sub
Oracle, along with other databases, analyzes a given query to create an execution plan. This plan is the most efficient way of retrieving the data.
Oracle provides the 'explain plan
' statement which analyzes the query but doesn't run it, instead populating a special table that you can query (the plan table).
The syntax (simple version, there are other options such as to mark the rows in the plan table with a special ID, or use a different plan table) is:
explain plan for <sql query>
The analysis of that data is left for another question, or your further research.
I tried the accepted answer, it did not work.
However the simple way to do it is below:-
<option value="1" <c:if test="${item.quantity == 1}"> <c:out value= "selected=selected"/</c:if>>1</option>
<option value="2" <c:if test="${item.quantity == 2}"> <c:out value= "selected=selected"/</c:if>>2</option>
<option value="3" <c:if test="${item.quantity == 3}"> <c:out value= "selected=selected"/</c:if>>3</option>
Enjoy!!
In case anyone else is interested: I needed a class that could be used interchangeably wherever either a string
or wstring
was expected. The following class convertible_string
, based on dk123's solution, can be initialized with either a string
, char const*
, wstring
or wchar_t const*
and can be assigned to by or implicitly converted to either a string
or wstring
(so can be passed into a functions that take either).
class convertible_string
{
public:
// default ctor
convertible_string()
{}
/* conversion ctors */
convertible_string(std::string const& value) : value_(value)
{}
convertible_string(char const* val_array) : value_(val_array)
{}
convertible_string(std::wstring const& wvalue) : value_(ws2s(wvalue))
{}
convertible_string(wchar_t const* wval_array) : value_(ws2s(std::wstring(wval_array)))
{}
/* assignment operators */
convertible_string& operator=(std::string const& value)
{
value_ = value;
return *this;
}
convertible_string& operator=(std::wstring const& wvalue)
{
value_ = ws2s(wvalue);
return *this;
}
/* implicit conversion operators */
operator std::string() const { return value_; }
operator std::wstring() const { return s2ws(value_); }
private:
std::string value_;
};
Node.js uses libuv behind the scenes. libuv has a thread pool (of size 4 by default). Therefore Node.js does use threads to achieve concurrency.
However, your code runs on a single thread (i.e., all of the callbacks of Node.js functions will be called on the same thread, the so called loop-thread or event-loop). When people say "Node.js runs on a single thread" they are really saying "the callbacks of Node.js run on a single thread".
open AAAA,"/filepath/filename.txt";
my @array = <AAAA>; # read the file into an array of lines
close AAAA;
As of Spark 2.0.0, you can do the following.
Let's define a Person
case class:
scala> case class Person(id: Int, name: String)
defined class Person
Import spark
SparkSession implicit Encoders
:
scala> import spark.implicits._
import spark.implicits._
And use SparkSession to create an empty Dataset[Person]
:
scala> spark.emptyDataset[Person]
res0: org.apache.spark.sql.Dataset[Person] = [id: int, name: string]
You could also use a Schema "DSL" (see Support functions for DataFrames in org.apache.spark.sql.ColumnName).
scala> val id = $"id".int
id: org.apache.spark.sql.types.StructField = StructField(id,IntegerType,true)
scala> val name = $"name".string
name: org.apache.spark.sql.types.StructField = StructField(name,StringType,true)
scala> import org.apache.spark.sql.types.StructType
import org.apache.spark.sql.types.StructType
scala> val mySchema = StructType(id :: name :: Nil)
mySchema: org.apache.spark.sql.types.StructType = StructType(StructField(id,IntegerType,true), StructField(name,StringType,true))
scala> import org.apache.spark.sql.Row
import org.apache.spark.sql.Row
scala> val emptyDF = spark.createDataFrame(sc.emptyRDD[Row], mySchema)
emptyDF: org.apache.spark.sql.DataFrame = [id: int, name: string]
scala> emptyDF.printSchema
root
|-- id: integer (nullable = true)
|-- name: string (nullable = true)
I repaired it using the Microsoft .NET Framework Repair Tool. After reloading my project a couple of times after that the problem went away.
jQuery code to check whether the checkbox is checked or not:
if($('input[name="checkBoxName"]').is(':checked'))
{
// checked
}else
{
// unchecked
}
Alternatively:
if($('input[name="checkBoxName"]:checked'))
{
// checked
}else{
// unchecked
}
To have the new string returned use this:
std::string ReplaceString(std::string subject, const std::string& search,
const std::string& replace) {
size_t pos = 0;
while ((pos = subject.find(search, pos)) != std::string::npos) {
subject.replace(pos, search.length(), replace);
pos += replace.length();
}
return subject;
}
If you need performance, here is an optimized function that modifies the input string, it does not create a copy of the string:
void ReplaceStringInPlace(std::string& subject, const std::string& search,
const std::string& replace) {
size_t pos = 0;
while ((pos = subject.find(search, pos)) != std::string::npos) {
subject.replace(pos, search.length(), replace);
pos += replace.length();
}
}
Tests:
std::string input = "abc abc def";
std::cout << "Input string: " << input << std::endl;
std::cout << "ReplaceString() return value: "
<< ReplaceString(input, "bc", "!!") << std::endl;
std::cout << "ReplaceString() input string not modified: "
<< input << std::endl;
ReplaceStringInPlace(input, "bc", "??");
std::cout << "ReplaceStringInPlace() input string modified: "
<< input << std::endl;
Output:
Input string: abc abc def
ReplaceString() return value: a!! a!! def
ReplaceString() input string not modified: abc abc def
ReplaceStringInPlace() input string modified: a?? a?? def
//sort by number
bool sortByStartNumber(Player &p1, Player &p2) {
return p1.getStartNumber() < p2.getStartNumber();
}
//sort by string
bool sortByName(Player &p1, Player &p2) {
string s1 = p1.getFullName();
string s2 = p2.getFullName();
return s1.compare(s2) == -1;
}
You can use Func<T, TResult>
generic delegate. (See MSDN)
Func<MyType, ReturnType> func = (db) => { return new MyType(); }
Also there are useful generic delegates which considers a return value:
Method:
public MyType SimpleUsing.DoUsing<MyType>(Func<TInput, MyType> myTypeFactory)
Generic delegate:
Func<InputArgumentType, MyType> createInstance = db => return new MyType();
Execute:
MyType myTypeInstance = SimpleUsing.DoUsing(
createInstance(new InputArgumentType()));
OR explicitly:
MyType myTypeInstance = SimpleUsing.DoUsing(db => return new MyType());
This is what Visual C# program manager has to say: Why doesn't C# have a 'with' statement?
Many people, including the C# language designers, believe that 'with' often harms readability, and is more of a curse than a blessing. It is clearer to declare a local variable with a meaningful name, and use that variable to perform multiple operations on a single object, than it is to have a block with a sort of implicit context.
DateTime.DaysInMonth(DateTime.Now.Year, DateTime.Now.Month)
Java code:
Pattern pattern1 = Pattern.compile("(\\_\\(.*?\\))");
System.out.println(fileName.replace(matcher1.group(1), ""));
If you are in same WORKGROUP you need software to connect and control the target server.shutdown.exe /s /m \\<target-computer-name>
should be enough shutdown /?
for more, otherwise
UPDATE:
Seems shutdown.bat here is for shutting down apache-tomcat.
So, you might be interested to psexec or PuTTY: A Free Telnet/SSH Client
As native solution could be wmic
Example:
wmic /node:<target-computer-name> process call create "cmd.exe c:\\somefolder\\batch.bat"
In your example should be:
wmic /node:inidsoasrv01 process call create ^
"cmd.exe D:\\apache-tomcat-6.0.20\\apache-tomcat-7.0.30\\bin\\shutdown.bat"
wmic /?
and wmic /node /?
for more
Try this code
<input type="TextBox" ID="yearBox" border="0" disabled>
$('#yearSelected li').on('click', function(){
$('#yearBox').val($(this).text());
});
<a href="#" class="dropdown-toggle" data-toggle="dropdown"> <i class="fas fa-calendar-alt"></i> <span>Academic Years</span> <i class="fas fa-chevron-down"></i> </a>
<ul class="dropdown-menu">
<li>
<ul class="menu" id="yearSelected">
<li><a href="#">2014-2015</a></li>
<li><a href="#">2015-2016</a></li>
<li><a href="#">2016-2017</a></li>
<li><a href="#">2017-2018</a></li>
</ul>
</li>
</ul>
its work for me
You can load data from a csv or text file. If you have a text file with records from a table, you can load those records within the table. For example if you have a text file, where each row is a record with the values for each column, you can load the records this way.
id //field 1
name //field2
1,peter
2,daniel
...
--example on windows
LOAD DATA LOCAL INFILE 'C:\\directory_example\\table.txt'
INTO TABLE Table
CHARACTER SET UTF8
FIELDS TERMINATED BY ','
LINES TERMINATED BY '\r\n';
Use $#
to grab the number of arguments, if it is unequal to 2 there are not enough arguments provided:
if [ $# -ne 2 ]; then
usage;
fi
Next, check if $1
equals -t
, otherwise an unknown flag was used:
if [ "$1" != "-t" ]; then
usage;
fi
Finally store $2
in FLAG
:
FLAG=$2
Note: usage()
is some function showing the syntax. For example:
function usage {
cat << EOF
Usage: script.sh -t <application>
Performs some activity
EOF
exit 1
}
Use with=FALSE
:
cols = paste("V", c(1,2,3,5), sep="")
dt[, !cols, with=FALSE]
I suggest going through the "Introduction to data.table" vignette.
Update: From v1.10.2
onwards, you can also do:
dt[, ..cols]
See the first NEWS item under v1.10.2 here for additional explanation.
In my case i needed to update the npm version from 5.3.0 ? 5.4.2 .
Before i could use this -- npm i -g npm
.. i needed to run two commands which perfectly solved my problem. It is highly likely that it will even solve your problem.
Step 1: sudo chown -R $USER /usr/local
Step 2: npm install -g cordova ionic
After this you should update your npm to latest version
Step 3: npm i -g npm
Then you are good to go. Hope This solves your problem. Cheers!!
var myString = "something format_abc";_x000D_
var arr = myString.match(/\bformat_(.*?)\b/);_x000D_
console.log(arr[0] + " " + arr[1]);
_x000D_
The \b
isn't exactly the same thing. (It works on --format_foo/
, but doesn't work on format_a_b
) But I wanted to show an alternative to your expression, which is fine. Of course, the match
call is the important thing.
just unchecking Adjust Scroll View Insets
didn't work for me.
Later, I tried to set tableview's header to nil, which fortunately worked.
self.tableView.tableHeaderView = nil
In your example propertyInfo.GetValue(this, null)
should work. Consider altering GetNamesAndTypesAndValues()
as follows:
public void GetNamesAndTypesAndValues()
{
foreach (PropertyInfo propertyInfo in allClassProperties)
{
Console.WriteLine("{0} [type = {1}] [value = {2}]",
propertyInfo.Name,
propertyInfo.PropertyType,
propertyInfo.GetValue(this, null));
}
}
You could try something like this as well
<a href="#" onclick="one(); two();" >click</a>
<script type="text/javascript">
function one(){
alert('test');
}
function two(){
alert('test2');
}
</script>
len(df[df["Lastname"]=="Smith"].values)
I know question is years old, but here is a Rx implementation. It handles the length % chunkSize != 0
problem out of the box:
public static IEnumerable<string> Chunkify(this string input, int size)
{
if(size < 1)
throw new ArgumentException("size must be greater than 0");
return input.ToCharArray()
.ToObservable()
.Buffer(size)
.Select(x => new string(x.ToArray()))
.ToEnumerable();
}
You can use WMI Code creator. I guess you can have a combination of "keys" (processorid,mac and software generated key).
using System.Management;
using System.Windows.Forms;
try
{
ManagementObjectSearcher searcher =
new ManagementObjectSearcher("root\\CIMV2", "SELECT * FROM Win32_Processor");
foreach (ManagementObject queryObj in searcher.Get())
{
Console.WriteLine("-----------------------------------");
Console.WriteLine("Win32_Processor instance");
Console.WriteLine("-----------------------------------");
Console.WriteLine("Architecture: {0}", queryObj["Architecture"]);
Console.WriteLine("Caption: {0}", queryObj["Caption"]);
Console.WriteLine("Family: {0}", queryObj["Family"]);
Console.WriteLine("ProcessorId: {0}", queryObj["ProcessorId"]);
}
}
catch (ManagementException e)
{
MessageBox.Show("An error occurred while querying for WMI data: " + e.Message);
}
Retrieving Hardware Identifiers in C# with WMI by Peter Bromberg
json_obj=json.dumps(a_dict, ensure_ascii=False)
In general I would consider setting up of an environment variable (like PYTHONPATH)
to be a bad practice. While this might be fine for a one off debugging but using this as
a regular practice might not be a good idea.
Usage of environment variable leads to situations like "it works for me" when some one
else reports problems in the code base. Also one might carry the same practice with the
test environment as well, leading to situations like the tests running fine for a
particular developer but probably failing when some one launches the tests.
Yes.
Random.NextDouble returns a double between 0 and 1. You then multiply that by the range you need to go into (difference between maximum and minimum) and then add that to the base (minimum).
public double GetRandomNumber(double minimum, double maximum)
{
Random random = new Random();
return random.NextDouble() * (maximum - minimum) + minimum;
}
Real code should have random be a static member. This will save the cost of creating the random number generator, and will enable you to call GetRandomNumber very frequently. Since we are initializing a new RNG with every call, if you call quick enough that the system time doesn't change between calls the RNG will get seeded with the exact same timestamp, and generate the same stream of random numbers.
Torsten Engelbrecht's comment in John Petrones answer expanded:
curl -XDELETE 'http://localhost:9200/twitter/tweet/_query' -d
'{
"query":
{
"match_all": {}
}
}'
(I did not want to edit John's reply, since it got upvotes and is set as answer, and I might have introduced an error)
You can use COPY table TO ... WITH BINARY
which is "somewhat faster than the text and CSV formats." Only do this if you have millions of rows to insert, and if you are comfortable with binary data.
Here is an example recipe in Python, using psycopg2 with binary input.
I had issues with the answers here in converting the deviceToken Data object to a string to send to my server with the current beta of Xcode 8. Especially the one that was using deviceToken.description as in 8.0b6 that would return "32 Bytes" which isn't very useful :)
This is what worked for me...
Create an extension on Data to implement a "hexString" method:
extension Data {
func hexString() -> String {
return self.reduce("") { string, byte in
string + String(format: "%02X", byte)
}
}
}
And then use that when you receive the callback from registering for remote notifications:
func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {
let deviceTokenString = deviceToken.hexString()
// Send to your server here...
}
To attempt command line arguments directly is not possible.
One alternative might be environment variables (https://superuser.com/questions/728951/systemd-giving-my-service-multiple-arguments).
This is where I found the answer: http://www.freedesktop.org/software/systemd/man/systemctl.html
so sudo systemctl restart myprog -v
-- systemctl will think you're trying to set one of its flags, not myprog's flag.
sudo systemctl restart myprog someotheroption
-- systemctl will restart myprog and the someotheroption service, if it exists.
I'm using a simplyfied version (just using position relative) based on @SimonEast answer:
li:before {
content: "\e080";
font-family: 'Glyphicons Halflings';
font-size: 9px;
position: relative;
margin-right: 10px;
top: 3px;
color: #ccc;
}
The easiest way would probably be to put your web resources into the assets folder then call:
webView.loadUrl("file:///android_asset/filename.html");
For Complete Communication between Java and Webview See This
Update: The assets folder is usually the following folder:
<project>/src/main/assets
This can be changed in the asset folder configuration setting in your <app>.iml
file as:
<option name=”ASSETS_FOLDER_RELATIVE_PATH” value=”/src/main/assets” />
See Article Where to place the assets folder in Android Studio
None of the answers I read worked in PuTTY, so I found a comment on this article:
In the settings for your connection, under "Window->Behavior" you'll find a setting "System Menu Appears on ALT alone". Then CTRL + L, ALT, l (that's a lower case L) will scroll the screen and then clear the scrollback buffer.
(relevant to the OP because I am connecting to an Ubuntu server, but also apparently relevant no matter what your server is running.)
If ALTER COLUMN doesn't work.
It is not unusual for alter column to fail because it cannot make the transformation you desire. In this case, the solution is to create a dummy table TableName_tmp, copy the data over with your specialized transformation in the bulk Insert command, drop the original table, and rename the tmp table to the original table's name. You'll have to drop and recreate the Foreign key constraints and, for performance, you'll probably want to create keys after filling the tmp table.
Sound like a lot of work? Actually, it isn't.
If you are using SQL Server, you can make the SQL Server Management Studio do the work for you!
Maybe these answers above are old but with the new Android Studios 1, you do the following to see the module to run on 1.7 (or 1.6 if you prefer). Click File --> Project Structure. Select the module you want to run and then under "Source Compatibility" and "Target Compatibility", select 1.7. Click "OK".
You can get the maximum key this way:
<?php
$arr = array("a"=>"test", "b"=>"ztest");
$max = max(array_keys($arr));
?>
Only Chrome CSS hack:
@media all and (-webkit-min-device-pixel-ratio:0) and (min-resolution: .001dpcm) {
#selector {
background: red;
}
}
controller_name
holds the name of the controller used to serve the current view.
You can do it like this:
var myApp = angular.module('myApp', [])
.controller('Ctrl', ['$scope', function($scope) {
$scope.aaa = 3432
}])
.directive('test', function () {
return {
link: function (scope, elm, attr) {
var look = elm.children('#findme').addClass("addedclass");
console.log(look);
}
};
});
<div ng-app="myApp" ng-controller="Ctrl">
<div test>TEST Div
<div id="findme">{{aaa}}</div>
</div>
</div>
You could use $
extraction:
class(aframe$a1)
[1] "numeric"
or the double square bracket:
class(aframe[["a1"]])
[1] "numeric"
We can iterate object using in keyword and can perform any arithmetic operation.
// input
const sample = {
'a': 1,
'b': 2,
'c': 3
};
// var
let sum = 0;
// object iteration
for (key in sample) {
//sum
sum += (+sample[key]);
}
// result
console.log("sum:=>", sum);
_x000D_
Following these instructions allowed me to recreate my tmp directory and fix the issue:
Display all file systems and their disk usage in human readable form:
df -h
Find the processes that have files open in /tmp
sudo lsof /tmp/**/*
Then umount /tmp
and /var/tmp
:
umount -l /tmp
umount -l /var/tmp
Then remove the corrupt partition file:
rm -fv /usr/tmpDSK
Then create a nice new one:
/scripts/securetmp
Note that by editing the securetmp Perl script you can manually set the size of the tmp directory yourself, however just running the script increased the size of the tmp directory on our server from roughly 450MB to 4.0GB.
This simple approach reads the requirements file from setup.py
. It is a variation of the answer by Dmitiry S.. This answer is compatible only with Python 3.6+.
Per D.S., requirements.txt
can document concrete requirements with specific version numbers, whereas setup.py
can document abstract requirements with loose version ranges.
Below is an excerpt of my setup.py
.
import distutils.text_file
from pathlib import Path
from typing import List
def _parse_requirements(filename: str) -> List[str]:
"""Return requirements from requirements file."""
# Ref: https://stackoverflow.com/a/42033122/
return distutils.text_file.TextFile(filename=str(Path(__file__).with_name(filename))).readlines()
setup(...
install_requires=_parse_requirements('requirements.txt'),
...)
Note that distutils.text_file.TextFile
will strip comments. Also, per my experience, you apparently do not need to take any special step to bundle in the requirements file.
guys This error because of Element Id not Visible from js Try to inspect element from UI and paste it on javascript file:
before :
document.getElementById('form:salesoverviewform:ticketstatusid').value =topping;
After :
document.getElementById('form:salesoverviewform:j_idt190:ticketstatusid').value =topping;
Credits to Divya Akka .... :)
None of the above responses are working for error that has no body but still has some describing text. For me, it was SSL certificate problem: unable to get local issuer certificate
error. So I looked right into the code, because doc does't really say much, and did this (in Guzzle 7.1):
try {
// call here
} catch (\GuzzleHttp\Exception\RequestException $e) {
if ($e->hasResponse()) {
$response = $e->getResponse();
// message is in $response->getReasonPhrase()
} else {
$response = $e->getHandlerContext();
if (isset($response['error'])) {
// message is in $response['error']
} else {
// Unknown error occured!
}
}
}
add $row = mysql_fetch_object($result);
after your mysql_query();
your html <img src="<?php echo $row->dvdimage; ?>" width="175" height="200" />
If you're using .NET 4.0 you should be able to allow these urls via the web.config
<system.web>
<httpRuntime
requestPathInvalidCharacters="<,>,%,&,:,\,?" />
</system.web>
Note, I've just removed the asterisk (*), the original default string is:
<httpRuntime
requestPathInvalidCharacters="<,>,*,%,&,:,\,?" />
See this question for more details.
Through SSMS, I created a new schema by:
I found this post to change the schema, but was also getting the same permissions error when trying to change to the new schema. I have several databases listed in my SSMS, so I just tried specifying the database and it worked:
USE (yourservername)
ALTER SCHEMA exe TRANSFER dbo.Employees
in the java src you can add a new tool like this:
public static String remplaceVirguleParpoint(String chaine) {
return chaine.replaceAll(",", "\\.");
}
I use this functions
function strright($str, $separator) {
if (intval($separator)) {
return substr($str, -$separator);
} elseif ($separator === 0) {
return $str;
} else {
$strpos = strpos($str, $separator);
if ($strpos === false) {
return $str;
} else {
return substr($str, -$strpos + 1);
}
}
}
function strleft($str, $separator) {
if (intval($separator)) {
return substr($str, 0, $separator);
} elseif ($separator === 0) {
return $str;
} else {
$strpos = strpos($str, $separator);
if ($strpos === false) {
return $str;
} else {
return substr($str, 0, $strpos);
}
}
}
As Jim Garrison said in the comment, no obvious reason why you'd make a one-element list out of drug.upper()
(which implies drug is a string).
But that's not your error, as your function medications_minimum3()
doesn't even use the second argument (something you should fix).
TypeError: unhashable type: 'list'
usually means that you are trying to use a list as a hash argument (like for accessing a dictionary). I'd look for the error in counter[row[11]]+=1
-- are you sure that row[11]
is of the right type? Sounds to me it might be a list.
From the composer help create-project
command
The create-project command creates a new project from a given
package into a new directory. If executed without params and in a directory with a composer.json file it installs the packages for the current project.
You can use this command to bootstrap new projects or setup a clean
version-controlled installation for developers of your project.[version]
You can also specify the version with the package name using = or : as separator.
To install unstable packages, either specify the version you want, or use the --stability=dev (where dev can be one of RC, beta, alpha or dev).
This command works:
composer create-project laravel/laravel=4.1.27 your-project-name --prefer-dist
This works with the * notation.
You can iterate DefaultView
as the following code by Indexer
:
DataTable dt = new DataTable();
// add some rows to your table
// ...
dt.DefaultView.Sort = "OneColumnName ASC"; // For example
for (int i = 0; i < dt.Rows.Count; i++)
{
DataRow oRow = dt.DefaultView[i].Row;
// Do your stuff with oRow
// ...
}
In bash, contrary to [
, [[
prevents word splitting of variable values.
If you're able to use MySQL Workbench, you can do this by right-clicking the row and selecting 'Copy row', and then right-clicking the empty row and selecting 'Paste row', and then changing the ID, and then clicking 'Apply'.
Copy the row:
Paste the copied row into the blank row:
Change the ID:
Apply:
The model (@Model
) only exists while the page is being constructed. Once the page is rendered in the browser, all that exists is HTML, JavaScript and CSS.
What you will want to do is put the PostID in a hidden field. As the PostID value is fixed, there actually is no need for JavaScript. A simple @HtmlHiddenFor
will suffice.
However, you will want to change your foreach loop to a for loop. The final solution will look something like this:
for (int i = 0 ; i < Model.Post; i++)
{
<br/>
<b>Posted by :</b> @Model.Post[i].Username <br/>
<span>@Model.Post[i].Content</span> <br/>
if(Model.loginuser == Model.username)
{
@Html.HiddenFor(model => model.Post[i].PostID)
@Html.TextAreaFor(model => model.addcomment.Content)
<button type="submit">Add Comment</button>
}
}
You are reading all rows into a list, then processing that list. Don't do that.
Process your rows as you produce them. If you need to filter the data first, use a generator function:
import csv
def getstuff(filename, criterion):
with open(filename, "rb") as csvfile:
datareader = csv.reader(csvfile)
yield next(datareader) # yield the header row
count = 0
for row in datareader:
if row[3] == criterion:
yield row
count += 1
elif count:
# done when having read a consecutive series of rows
return
I also simplified your filter test; the logic is the same but more concise.
Because you are only matching a single sequence of rows matching the criterion, you could also use:
import csv
from itertools import dropwhile, takewhile
def getstuff(filename, criterion):
with open(filename, "rb") as csvfile:
datareader = csv.reader(csvfile)
yield next(datareader) # yield the header row
# first row, plus any subsequent rows that match, then stop
# reading altogether
# Python 2: use `for row in takewhile(...): yield row` instead
# instead of `yield from takewhile(...)`.
yield from takewhile(
lambda r: r[3] == criterion,
dropwhile(lambda r: r[3] != criterion, datareader))
return
You can now loop over getstuff()
directly. Do the same in getdata()
:
def getdata(filename, criteria):
for criterion in criteria:
for row in getstuff(filename, criterion):
yield row
Now loop directly over getdata()
in your code:
for row in getdata(somefilename, sequence_of_criteria):
# process row
You now only hold one row in memory, instead of your thousands of lines per criterion.
yield
makes a function a generator function, which means it won't do any work until you start looping over it.
or
Any height or width will work
<style>
.list_container {
direction: rtl;
overflow:auto;
height: 50px;
width: 50px;
}
.item_direction {
direction:ltr;
}
</style>
<div class="list_container">
<div class="item_direction">1</div>
<div class="item_direction">2</div>
<div class="item_direction">3</div>
<div class="item_direction">4</div>
<div class="item_direction">5</div>
<div class="item_direction">6</div>
<div class="item_direction">7</div>
<div class="item_direction">8</div>
<div class="item_direction">9</div>
<div class="item_direction">10</div>
<div class="item_direction">11</div>
<div class="item_direction">12</div>
</div>
Optionally add class="item_direction
to each item to change the direction of the text flow back, while preserving the container direction.
Do you want to find elements that contain "match", or that equal "match"?
This will find elements that have text nodes that equal 'match' (matches none of the elements because of leading and trailing whitespace in random2
):
//*[text()='match']
This will find all elements that have text nodes that equal "match", after removing leading and trailing whitespace(matches random2
):
//*[normalize-space(text())='match']
This will find all elements that contain 'match' in the text node value (matches random2
and random3
):
//*[contains(text(),'match')]
This XPATH 2.0 solution uses the matches()
function and a regex pattern that looks for text nodes that contain 'match' and begin at the start of the string(i.e. ^
) or a word boundary (i.e. \W
) and terminated by the end of the string (i.e. $
) or a word boundary. The third parameter i
evaluates the regex pattern case-insensitive. (matches random2
)
//*[matches(text(),'(^|\W)match($|\W)','i')]
Modify the definition of the function check_me as::
function check_me(ev) {
Now you can access the methods and parameters of the event, in your case:
ev.preventDefault();
Then, you have to pass the parameter on the onclick in the inline call::
<button type="button" onclick="check_me(event);">Click Me!</button>
A useful link to understand this.
<!DOCTYPE html>
<html lang="en">
<head>
<script type="text/javascript">
function check_me(ev) {
ev.preventDefault();
alert("Hello World!")
}
</script>
</head>
<body>
<button type="button" onclick="check_me(event);">Click Me!</button>
</body>
</html>
Although the above is the direct answer to the question (passing an event object to an inline event), there are other ways of handling events that keep the logic separated from the presentation
addEventListener
:<!DOCTYPE html>
<html lang="en">
<head>
</head>
<body>
<button id='my_button' type="button">Click Me!</button>
<!-- put the javascript at the end to guarantee that the DOM is ready to use-->
<script type="text/javascript">
function check_me(ev) {
ev.preventDefault();
alert("Hello World!")
}
<!-- add the event to the button identified #my_button -->
document.getElementById("my_button").addEventListener("click", check_me);
</script>
</body>
</html>
Both of the above solutions are fine for a small project, or a hackish quick and dirty solution, but for bigger projects, it is better to keep the HTML separated from the Javascript.
Just put this two files in the same folder:
<!DOCTYPE html>
<html lang="en">
<head>
</head>
<body>
<button id='my_button' type="button">Click Me!</button>
<!-- put the javascript at the end to guarantee that the DOM is ready to use-->
<script type="text/javascript" src="example.js"></script>
</body>
</html>
function check_me(ev) {
ev.preventDefault();
alert("Hello World!")
}
document.getElementById("my_button").addEventListener("click", check_me);
"test": "jest api/ds_server/ds_server.test.js"