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What's the difference between echo, print, and print_r in PHP?
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print and echo are more or less the same; they are both language constructs that display strings. The differences are subtle: print has a return value of 1 so it can be used in expressions whereas echo has a void return type; echo can take multi...
static allocation in java - heap, stack and permanent generation
I have been lately reading a lot on memory allocation schemes in java, and there have been many doubts as I have been reading from various sources. I have collected my concepts, and I would request to go through all of the points and comment on them. I came to know that memory allocation is JVM spec...
How to print last two columns using awk
...of variable NF which is set to the total number of fields in the input record:
awk '{print $(NF-1),"\t",$NF}' file
this assumes that you have at least 2 fields.
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地图组件（高德地图） · App Inventor 2 中文网
... 中文教程 IoT专题 AI2拓展 ChatGPT接入 Aia Store 开通VIP 搜索 地图组件（高德地图）
地图组...
What exactly is a C pointer if not a memory address?
In a reputable source about C, the following information is given after discussing the & operator:
25 Answers
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How to extract a floating number from a string [duplicate]
... I say floating and not decimal as it's sometimes whole. Can RegEx do this or is there a better way?
7 Answers
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How does a hash table work?
I'm looking for an explanation of how a hash table works - in plain English for a simpleton like me!
15 Answers
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Find the max of two or more columns with pandas
...a dataframe with columns A , B . I need to create a column C such that for every record / row:
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Reference: mod_rewrite, URL rewriting and “pretty links” explained
...oficiency in HTTP. Can someone explain in simple terms how "pretty links" work and how mod_rewrite can be used to create them?
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How can I split a JavaScript string by white space or comma?
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input.split(/[ ,]+/);
This particular regex splits on a sequence of one or more commas or spaces, so that e.g. multiple consecutive spaces or a comma+space sequence do not produce empty elements in the results.
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