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Is a Java hashmap search really O(1)?

...someone explain why this is so? Unless these hashmaps are vastly different from any of the hashing algorithms I was bought up on, there must always exist a dataset that contains collisions. ...
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PHP: Count a stdClass object

I have a stdClass object created from json_decode that won't return the right number when I run the count($obj) function. The object has 30 properties, but the return on the count() function is say 1. ...
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Margin-Top push outer div down

...feeling it has something to do with how margins are collapsed (combined). from W3C Collapsing Margins: In this specification, the expression collapsing margins means that adjoining margins (no non-empty content, padding or border areas or clearance separate them) of two or more boxe...
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Wait until all jQuery Ajax requests are done?

...ajax1() { // NOTE: This function must return the value // from calling the $.ajax() method. return $.ajax({ url: "someUrl", dataType: "json", data: yourJsonData, ... }); } In my opinion, it makes for a clean and clear syntax, an...
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Find object in list that has attribute equal to some value (that meets any condition)

...x for x in test_list if x.value == value), None) This gets the first item from the list that matches the condition, and returns None if no item matches. It's my preferred single-expression form. However, for x in test_list: if x.value == value: print("i found it!") break The na...
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How can I print the contents of a hash in Perl?

... Sorry, down vote from me for stuff that hijacks comments for actual functionality. A maintenance programmer could spend all day trying to work out why code like that was printing out unexpected stuff. – MikeKulls ...
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Which access modifiers are implied when not specified?

...s just how TS works, it will compile your code no matter if it's "correct" from a TS standpoint, this implies to everything in TS with no exception to classes, but the main point is if you respect TS warnings - you won't be accessing properties marked as private. – Andrew Bogda...
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What's the right way to decode a string that has special HTML entities in it? [duplicate]

Say I get some JSON back from a service request that looks like this: 7 Answers 7 ...
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How to increase font size in a plot in R?

...est or GBM), you need to use cex.names (if you're a human who reads things from an upright position, you might also want las=2) – geneorama Jan 12 '16 at 20:13 add a comment ...
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Find out if ListView is scrolled to the bottom?

... your calculation stuff here. You have all your // needed info from the parameters of this function. // Sample calculation to determine if the last // item is fully visible. final int lastItem = firstVisibleItem + visibleItemCount; if(la...