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How to convert a string into double and vice versa?
...y default?
[myNumFormatter setFormatterBehavior:NSNumberFormatterBehavior10_4];
// next line is very important!
[myNumFormatter setNumberStyle:NSNumberFormatterDecimalStyle]; // crucial
NSNumber *tempNum = [myNumFormatter numberFromString:tempStr];
NSLog(@"string '%@' gives NSNumber '%@' with ...
Remove CSS class from element with JavaScript (no jQuery) [duplicate]
...he latest version of most modern browsers:
ELEMENT.classList.remove("CLASS_NAME");
remove.onclick = () => {
const el = document.querySelector('#el');
if (el.classList.contains("red")) {
el.classList.remove("red");
}
}
.red {
background: red
}
<div id='el' class="r...
Making a Simple Ajax call to controller in asp.net mvc
...er, it's Url.Action(actionName, controllerName)
– xd6_
Apr 27 '17 at 22:20
1
Not a fan of this, i...
How can I remove all my changes in my SVN working directory?
...ame
svn status --no-ignore | grep '^\?' | \
perl -ne 'print "$1\n" if $_ =~ /^\S+\s+(.*)$/' | \
tr '\n' '\0' | xargs -0 rm -rf
Tested on Linux; may work in Cygwin, but relies on (I believe) a GNU-specific extension which allows xargs to split based on '\0' instead of whitespace.
The advan...
设置页使用指导 · App Inventor 2 中文网
...配置的默认值；再次进入屏幕核对保存状态。
when 按钮_恢复默认.Click() {
设置页1.ResetDefaults()
标签1.Text = join("当前主题：", 设置页1.GetValue("theme", "自动"))
}
when 设置页1.ErrorOccurred(操作, 消息) {
标签1.Text = join(操作, "：", 消息...
Collections.emptyList() vs. new instance
...inal <T> List<T> emptyList() {
return (List<T>) EMPTY_LIST;
}
So if your method (which returns an empty list) is called very often, this approach may even give you slightly better performance both CPU and memory wise.
...
How to list the tables in a SQLite database file that was opened with ATTACH?
...r" functions don't look into ATTACHed databases: they just query the SQLITE_MASTER table for the "main" database. Consequently, if you used
ATTACH some_file.db AS my_db;
then you need to do
SELECT name FROM my_db.sqlite_master WHERE type='table';
Note that temporary tables don't show up with ....
JavaScript variable number of arguments to function
... you can accept variable number of arguments with this syntax:
function my_log(...args) {
// args is an Array
console.log(args);
// You can pass this array as parameters to another function
console.log(...args);
}
Here's a small example:
function foo(x, ...args) {
console.l...
Switching to a TabBar tab view programmatically?
...
Like Stuart Clark's solution but for Swift 3:
func setTab<T>(_ myClass: T.Type) {
var i: Int = 0
if let controllers = self.tabBarController?.viewControllers {
for controller in controllers {
if let nav = controller as? UINavigationController, nav.topViewCont...
How can you use optional parameters in C#?
...
= new EDIDocumentType(EDIDocTypes.X12_814),
bool Production = false)
{
// My code is here
}
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