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Python append() vs. + operator on lists, why do these give different results?
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To explain "why":
The + operation adds the array elements to the original array. The array.append operation inserts the array (or any object) into the end of the original array, which results in a reference to self in that spot (hence the infinite recursion).
The difference here is that th...
C++ map access discards qualifiers (const)
The following code says that passing the map as const into the operator[] method discards qualifiers:
5 Answers
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How to merge two arrays in JavaScript and de-duplicate items
...re is no 'built in' way to remove duplicates (ECMA-262 actually has Array.forEach which would be great for this), we have to do it manually:
Array.prototype.unique = function() {
var a = this.concat();
for(var i=0; i<a.length; ++i) {
for(var j=i+1; j<a.length; ++j) {
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Check existence of directory and create if doesn't exist
... a lot of output. I find it cleaner to put this output into it's own directory(s). What I've written below will check for the existence of a directory and move into it, or create the directory and then move into it. Is there a better way to approach this?
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CMake: How to build external projects and include their targets
I have a Project A that exports a static library as a target:
5 Answers
5
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Clean ways to write multiple 'for' loops
For an array with multiple dimensions, we usually need to write a for loop for each of its dimensions. For example:
16 An...
How to have Android Service communicate with Activity
...ill access your service. If this is not the case you have to use option 1. or 2.
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1114 (HY000): The table is full
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EDIT: First check, if you did not run out of disk-space, before resolving to the configuration-related resolution.
You seem to have a too low maximum size for your innodb_data_file_path in your my.cnf, In this example
innodb_data_file_path = ibdata1:10M:autoextend:max:512M
you can...
How to dynamically change a web page's title?
...uld totally defeat the purpose of SEO. Most
crawlers aren't going to support javascript in the first place, so
they will take whatever is in the element as the page title.
If you want this to be compatible with most of the important crawlers,
you're going to need to actually change the t...
How to reference constants in EL?
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EL 3.0 or newer
If you're already on Java EE 7 / EL 3.0, then the @page import will also import class constants in EL scope.
<%@ page import="com.example.YourConstants" %>
This will under the covers be imported via ImportH...