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What are the differences between Rust's `String` and `str`?

...of UTF-8 bytes of dynamic length somewhere in memory. Since the size is unknown, one can only handle it behind a pointer. This means that str most commonly2 appears as &str: a reference to some UTF-8 data, normally called a "string slice" or just a "slice". A slice is just a view onto some data,...
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Find object by id in an array of JavaScript objects

...urn e.id == id; }); The result is an array with the items found. If you know that the object is always there and that it only occurs once, you can just use result[0].foo to get the value. Otherwise you should check the length of the resulting array. Example: if (result.length === 0) { // no res...
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What is the difference between save and export in Docker?

...r a couple of days and I already made some images (which was really fun!). Now I want to persist my work and came to the save and export commands, but I don't fully understand them. ...
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How to validate an Email in PHP?

How can I validate the input value is a valid email address using php5. Now I am using this code 7 Answers ...
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How do I simulate a hover with a touch in touch enabled browsers?

... removed touchend and preventDefault() in my website and it works good but now menus doesn't automatically closed by tap out of target. – Даниил Пронин May 26 '14 at 11:05 ...
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Redirecting to a certain route based on condition

...tials/login.html" ) { // not going to #login, we should redirect now $location.path( "/login" ); } } }); }) The one thing that seems odd is that I had to test the partial name (login.html) because the "next" Route object did not have a url or somethi...
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What is the meaning of symbol $ in jQuery?

... Hi, @Andrea i don't know whether i'm asking correct question or not, i'm new to jQuery. Can we replace that $ with any other symbol? and if possible, how? – Hulk Jun 16 '14 at 13:23 ...
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Is it possible to use JS to open an HTML select to show its option list? [duplicate]

... Unfortunately, it is now deprecated on Chrome 53+ – Washington Guedes Sep 27 '16 at 19:58 ...
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ASP.NET MVC - TempData - Good or bad practice

... have implications for you if: You don't use sessions on your site right now You have a system that needs to scale to high throughput, i.e. you'd prefer to avoid session state altogether You don't want to use cookies (I don't know how well MVC supports cookieless sessions right now) If your site...
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iPhone hide Navigation Bar only on first page

...wipe, but release early enough to stay on B, the navbar still gets hidden. Now there is no way to go back anymore. This is due to animated=YES. I know it looks ugly with animated=NO, but it seems when the animation for hiding the navbar is not yet finished, then the animation for showing it again is...