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What is Full Text Search vs LIKE
...ntations use an "inverted index". This is an index where the keys are individual terms, and the associated values are sets of records that contain the term. Full text search is optimized to compute the intersection, union, etc. of these record sets, and usually provides a ranking algorithm to quanti...
Best practices/guidance for maintaining assembly version numbers
... version numbers are not synonymous with the product version. One is technically driven, and the other is driven by the business.
The following assumes that you use some form of source control and a build server. For context we use TeamCity and Subversion/Git. TeamCity is free for a small (10) numb...
Do you use NULL or 0 (zero) for pointers in C++?
...ided. That's less common these days.
If you have to name the null pointer, call it nullptr; that's what it's called in C++11. Then, nullptr will be a keyword.
That said, don't sweat the small stuff.
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Is it possible to await an event instead of another async method?
...r the statement to run as a continuation on the Task or awaitable that you call await on. More often than not, it is some sort of asynchronous operation, which could be IO completion, or something that is on another thread.
– casperOne
Oct 12 '12 at 13:26
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When to call activity context OR application context?
... Context from getApplicationContext() holds onto something created by your calls on it that you don't clean up. With an Activity, if it holds onto something, once the Activity gets garbage collected, everything else flushes out too. The Application object remains for the lifetime of your process.
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理解Python的 with 语句 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...ows with is evaluated, the __enter__() function on the resulting object is called. The value returned by this function is assigned to the variable following as. After every statement in the block is evaluated, the __exit__() function is called.
紧跟with后面的语句被求值后，返回对象...
How to spawn a process and capture its STDOUT in .NET? [duplicate]
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This is wrong. To make this work, you'd need first to call BeginOutputReadLine which starts to read the stdOut stream. You could read the stream directly too. Unfortunately the implementation creates the IO streams only once the process is started. Calling BeginOutputReadLine or...
How to execute shell command in Javascript
... Except for one thing. You'll get the error "child is not a function". The call to exec() executes the command - no need to call child(). Unfortunately, the callback isn't called whenever the child process has something to output - it is called only when the child process exits. Sometimes that's OK ...
What's the difference between a Future and a Promise?
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According to this discussion, Promise has finally been called CompletableFuture for inclusion in Java 8, and its javadoc explains:
A Future that may be explicitly completed (setting its value and status), and may be used as a CompletionStage, supporting dependent functions an...
What is the difference between string primitives and String objects in JavaScript?
...erms of functionality. That aside, the behaviour you are trying to name is called auto-boxing. So what actually happens is that a primitive is converted to its wrapper type when a method of the wrapper type is invoked. Put simple:
var s = 'test';
Is a primitive data type. It has no methods, it is...