Arrays are allocated as single, large blocks of memory and entries are accessed by their indexes. The order of entries is fixed and they need have no particular identity apart from their position in the array. Other more complex data structures allow one to store objects identified and accessed using some sort of key. (Hash … Read more
This is your problem: _cache.TryGetValue(“CountsStats”, out countStats) out will change the object that countStats is pointing to. If it’s found in the cache, then it will be the cached object. Great! If it isn’t, then it will be null. You need to create a new instance in this case. You should change your code to … Read more
You have two independent if statements. That the second such statement has an else suite doesn’t matter here; that else suite is picked on the basis of the condition attached to the second if test; whatever happened in the first if statement doesn’t matter. If you want the two x tests to not be independent, … Read more
Sending a body with a GET request is not supported by HTTP. See this Q&A for full details. But if you really want to do this, even though you know it’s wrong, you can do it this way: iKnowThisBodyShouldBeIgnored := strings.NewReader(“text that won’t mean anything”) req, err := http.NewRequest(http.MethodGet, “http://example.com/foo”, iKnowThisBodyShouldBeIgnored) if err != nil … Read more
There are four basic functions that a search engine must perform: Gather a list of websites to crawl. Download the content of each of those web sites, and build up a mapping of “keywords” to pages. Allow users to type in keywords and then match those keywords against the mapping you built in step #2. … Read more
After std::vector<float> some_vec; your vector is empty. You must not access any element in it then, because there isn’t any. If you want to put values into it, you need to append them to the vector using push_back() for (some iterator loop here) { //snip some_vec.push_back(some_float); i++; } Alternatively, if you know the size in … Read more
Yes, the ternary operator also exists in Javascript. The code you posted for (i=0; i< (x == 0 && y < 0 ? x-y : x+y); i++) will work, verbatim. 1 solved Is there an equivalent of ? : operator of C# in Javascript/Jquery? [closed]
No, you do not need a main loop if you use the cmd.Cmd class included with Python: #! /usr/bin/env python3 import cmd class App(cmd.Cmd): prompt=”Type in a command: ” def do_a(self, arg): print(‘I am doing whatever action “a” is.’) def do_b(self, arg): print(‘I am doing whatever action “b” is.’) if __name__ == ‘__main__’: App().cmdloop() The … Read more
@Fay Zan Basically you don’t want user to input more than 9 digits for your field, This can be achieved using two ways programmatically or using layout views properties, In you xml simple give this attribute to your EditText android:maxLength=”9″ OR programmatically by checking the length of your field. for example suppose the id of … Read more
From what I can tell, it seems like you want to create a list of a bunch of random features. The way I would personally go about this is by using the random method Choice Choice allows us to pick a string from a list, then we use a function called .append that lets us … Read more
try this: In [16]: df.ix[df.groupby(df[‘datetime’].dt.date)[‘production’].transform(‘nunique’) < 44 * 4 * 24, ‘datetime’].dt.date.unique() Out[16]: array([datetime.date(2015, 12, 7)], dtype=object) this will give you all rows for the “problematic” days: df[df.groupby(df[‘datetime’].dt.date)[‘production’].transform(‘nunique’) < 44 * 4 * 24] PS there is a good reason why people asked you for a good reproducible sample data sets – with the one … Read more
If you have any doubts regarding the UITextFieldDelegate see this example. This func is called just before the typed charecter comes to the textfield. This func is mainly used for the validation. Just to understand what happens I have written small code. func textField(textField: UITextField, shouldChangeCharactersInRange range: NSRange, replacementString string: String) -> Bool { print(“TextField … Read more
materialList=null So initialize it before used materialList = findViewById(R.id.listViewID); solved null point exception on base Adapter
PHP is very strict in semicolons appearing in the middle. You forgot a semicolon ;: require ‘test.php’; // —————^ echo “67890”; Always make sure to display errors by enabling the display_errors in the php.ini or by using the following piece of code in the top of the pahe: <?php ini_set(‘display_errors’, 1); It is surprising that … Read more
There are several ways to do this. Old School One way would be to crop the overlaid image so that it has a triangle cut off and replaced by transparency. This would work in any browser that supported .pngs, however, the downside would be that for each image you’d need to create a new crop. … Read more