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Design by contract using assertions or exceptions? [closed]
...ion should be used when the internal data has been corrupted past fixing - if an assertion triggers, you can make no assumptions about the state of the program because it means something is /wrong/. If an assertion has gone off, you can't assume any data is valid. That's why a release build should a...
How do you sort an array on multiple columns?
...
If owner names differ, sort by them. Otherwise, use publication name for tiebreaker.
function mysortfunction(a, b) {
var o1 = a[3].toLowerCase();
var o2 = b[3].toLowerCase();
var p1 = a[1].toLowerCase();
var p2 = b...
How to remove certain characters from a string in C++?
..., ")", and "-"
characters from the string.
You can use the std::remove_if() algorithm to remove only the characters you specify:
#include <iostream>
#include <algorithm>
#include <string>
bool IsParenthesesOrDash(char c)
{
switch(c)
{
case '(':
case ')':
c...
How to make sure that string is valid JSON using JSON.NET
...est way would be to Parse the string using JToken.Parse, and also to check if the string starts with { or [ and ends with } or ] respectively (added from this answer):
private static bool IsValidJson(string strInput)
{
if (string.IsNullOrWhiteSpace(strInput)) { return false;}
strInput = strI...
Key existence check in HashMap
...
Do you ever store a null value? If not, you can just do:
Foo value = map.get(key);
if (value != null) {
...
} else {
// No such key
}
Otherwise, you could just check for existence if you get a null value returned:
Foo value = map.get(key);
if (v...
Disable pasting text into HTML form
... var onload = window.onload;
window.onload = function () {
if (typeof onload == "function") {
onload.apply(this, arguments);
}
var fields = [];
var inputs = document.getElementsByTagName("input");
var textareas = document.getElementsByTagN...
Is is possible to check if an object is already attached to a data context in Entity Framework?
...// Track whether we need to perform an attach
bool attach = false;
if (
context.ObjectStateManager.TryGetObjectStateEntry
(
context.CreateEntityKey(entitySetName, entity),
out entry
)
)
{
// Re-attach if nece...
How to remove local (untracked) files from the current Git working tree
...rrent directory.
Normally, only files unknown to Git are removed, but if the -x option is specified, ignored files are also removed. This can, for example, be useful to remove all build products.
If any optional <path>... arguments are given, only those paths are affected.
Step 1...
How can I use break or continue within for loop in Twig template?
...s a flag to break iterating:
{% set break = false %}
{% for post in posts if not break %}
<h2>{{ post.heading }}</h2>
{% if post.id == 10 %}
{% set break = true %}
{% endif %}
{% endfor %}
An uglier, but working example for continue:
{% set continue = false %}
{% ...
How do I detect if I am in release or debug mode?
... is a boolean value that will be true for a debug build, false otherwise:
if (BuildConfig.DEBUG) {
// do something for a debug build
}
There have been reports that this value is not 100% reliable from Eclipse-based builds, though I personally have not encountered a problem, so I cannot say how ...