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initializing a boolean array in java
...olean[size];
Arrays.fill(array, Boolean.FALSE);
Also note that the array index is zero based. The freq[Global.iParameter[2]] = false; line as you've there would cause ArrayIndexOutOfBoundsException. To learn more about arrays in Java, consult this basic Oracle tutorial.
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How can I see what I am about to push with git?
... This isn't exactly what you want. You should diff HEAD, not the index, against origin (git diff origin/master HEAD). Diffing the index will give the same results if and only if you have no changes staged for commit. If you have changes staged, they'll be included in the diff, but clearly ...
Why do python lists have pop() but not push()
...ere's already a list.pop that removes and returns the last element (that indexed at -1) and list.append semantic is consistent with that use?
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Working with select using AngularJS's ng-options
...ns, the values of option tags written out by ng-options will always be the index of the array item the option tag relates to. This is because AngularJS actually allows you to select entire objects with select controls, and not just primitive types. For example:
app.controller('MainCtrl', function($...
What is the difference between declarative and procedural programming paradigms?
...paradigm:
C (and most other legacy languages)
PHP, mostly
In some sense, all major languages
Object-Oriented
It typically refers to languages that exhibit a hierarchy of types that inherit both methods and state from base types to derived types, but also includes the unusual prototype-based Jav...
How to Correctly Use Lists in R?
...t lists.
R lists are very much like a hash map data structure in that each index value can be associated with any object. Here's a simple example of a list that contains 3 different classes (including a function):
> complicated.list <- list("a"=1:4, "b"=1:3, "c"=matrix(1:4, nrow=2), "d"=searc...
Android List Preferences: have summary as selected value?
... // set first value by default
listPreference.setValueIndex(0);
}
listPreference.setSummary(listPreference.getValue().toString());
listPreference.setOnPreferenceChangeListener(new OnPreferenceChangeListener() {
@Override
public boo...
Why is there huge performance hit in 2048x2048 versus 2047x2047 array multiplication?
... are offset from each other by 2048*sizeof(float) and thus map to the same index in the L1 cache. With an N-way associative cache you will have typically have 1-8 cache locations for all of these. Thus almost all of those accesses will trigger an L1 cache eviction, and fetching of data from a slow...
Importance of varchar length in MySQL table
...u can run into: Big joins are nearly impossible with long varchar columns. Indexing on those columns are a real killer. Your disk has to store the data. One memory page can hold less rows and table scans will be much slower. Also the query cache will be unlikely to help you here.
You have to ask yo...
How to install Google Play Services in a Genymotion VM (with no drag and drop support)?
How can I install Google Play Services in a Genymotion emulator with no drag and drop support?
17 Answers
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