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What is the difference between a HashMap and a TreeMap? [duplicate]
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TreeMap is an example of a SortedMap, which means that the order of the keys can be sorted, and when iterating over the keys, you can expect that they will be in order.
HashMap on the other hand, makes no such guarantee. Therefore, when iterating over the keys of a HashMap, you can...
drag drop files into standard html file input
... dragover and dragenter events need to have 'preventDefault' called
// in order for the 'drop' event to register.
// See: https://developer.mozilla.org/en-US/docs/Web/Guide/HTML/Drag_operations#droptargets
dropContainer.ondragover = dropContainer.ondragenter = function(evt) {
evt.preventDefau...
Replace only some groups with Regex
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In order for this to work, I had to add .Value to m.Groups[1] etc.
– jbeldock
Dec 4 '13 at 19:02
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Create a CSV File for a user in PHP
... to create the CSV, but miss a basic part of the question: how to link. In order to link to download of the CSV-file, you just link to the .php-file, which in turn responds as being a .csv-file. The PHP headers do that. This enables cool stuff, like adding variables to the querystring and customize ...
Is there still any reason to learn AWK?
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+1 Sold. I am going to order this book. I have used awk for years as a quick and powerful one-liner scripting language. Awk is a great pre-processor for files that would otherwise take a dozen lines to code. I cannot count how many times I have use...
UILabel is not auto-shrinking text to fit label size
...ant:
A Boolean value indicating whether the font size should be reduced in order to fit the title string into the label’s bounding rectangle (this property is effective only when the numberOfLines property is set to 1).
When setting this property, minimumScaleFactor MUST be set too (a good default...
Pass in an array of Deferreds to $.when()
...er will require, that handler would need to process the arguments array in order to retrieve the result of each promise.
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How can I beautify JavaScript code using Command Line?
I am writing a batch script in order to beautify JavaScript code. It needs to work on both Windows and Linux .
10 Answe...
What's the point of NSAssert, actually?
...g a method which calculates the sum of two greater than zero integers. In order to make sure the method was always used as intended you would probably put an assert which tests that condition.
Short answer: They enforce that your code is used only as intended.
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Does the join order matter in SQL?
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For INNER joins, no, the order doesn't matter. The queries will return same results, as long as you change your selects from SELECT * to SELECT a.*, b.*, c.*.
For (LEFT, RIGHT or FULL) OUTER joins, yes, the order matters - and (updated) things are...