Here you will learn how to convert a numeric string to the integer type.

In C#, you can convert a string representation of a number to an integer using the following ways:

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1. Parse() method
2. Convert class
3. TryParse() method - Recommended

• Age parse trees are useful for scene classification and outperform global scene features such as Gist descrip-tors (Aude & Torralba, 2001). Syntactic parsing of natural language sentences is a central task in natural language processing (NLP) because of its importance in mediating between lin-guistic expression and meaning. Our RNN architec.
• The main purpose of the mapfiles is to retrieve a set of memory mapped files in a fast way instead of parsing /proc//maps or /proc//smaps, both of which contain many more records. At the same time one can open(2) mappings from the listings of two processes and comparing their inode numbers to figure out which anonymous memory areas.

Parse Method

The Parse() methods are available for all the primitive datatypes. It is the easiest way to convert from string to integer.

The Parse methods are available for 16, 32, 64 bit signed integer types:

It takes up to 3 parameters, a string which is mandatory to convert string to integer format, the second parameter contains the number style which specifies the style of the number to be represented, and the third parameter represents string cultural-specific format.

The following example demonstrates converting numeric strings to integers.

As you can see in the above example, a valid numeric string can be converted to an integer. The Parse() method allows conversion of the numeric string into different formats into an integer using the NumberStyles enum e.g string with parentheses, culture-specific numeric string, with a currency symbol, etc.

However, the passed string must be a valid numeric string or in the range of the type on which they are being called. The following statements throw exceptions.

Pros:

• Converts valid numeric string to integer value.
• Supports different number styles.
• Supports culture-specific custom formats.

Cons:

• Input string must be a valid numeric string.
• The numeric string must be within the range of int type on which the method is called.
• Throws exception on converting null or invalid numeric string.

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Convert Class

Another way to convert string to integer is by using static Convert class. The Convert class includes different methods which convert base data type to another base data type.

The Convert class includes the following methods to convert from different data types to int type.

The Convert.ToInt16() method returns the 16-bit integer e.g. short, the Convert.ToInt32() returns 32-bit integers e.g. int and the Convert.ToInt64() returns the 64-bit integer e.g. long.

Pros:

• Converts from any data type to integer.
• Converts null to 0, so not throwing an exception.

Cons:

• Input string must be valid number string, cannot include different numeric formats. Only works with valid integer string.
• Input string must be within the range of called IntXX method e.g. Int16, Int32, Int64.
• The input string cannot include parenthesis, comma, etc.
• Must use a different method for different integer ranges e.g. cannot use the Convert.ToInt16() for the integer string higher than '32767'.

Visit Convert class for more information.

TryParse Method

The TryParse() methods are available for all the primitive types to convert string to the calling data type. It is the recommended way to convert string to an integer.

The TryParse() method converts the string representation of a number to its 16, 32, and 64-bit signed integer equivalent. It returns boolean which indicates whether the conversion succeeded or failed and so it never throws exceptions.

The TryParse() methods are available for all the integer types:

The TryParse() method takes 3 parameters identical to the Parse() method having the same functionality.

The following example demonstrates the TryParse() method.

The following example demonstrates converting invalid numeric string.

In the above example, numberStr = '123456as' which is invalid numeric string. However, Int32.TryParse() method will return false instead of throwing an exception.

Thus, the TryParse() method is the safest way to converting numeric string to integer type when we don't know whether the string is a valid numeric string or not.

Pros:

• Converts different numeric strings to integers.
• Converts string representation of different number styles.
• Converts culture-specific numeric strings to integers.
• Never throws an exception. Returns false if cannot parse to an integer.

Cons:

• Must use out parameter.
• Need to write more code lines instead of single method call.

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Abstract: Scene parsing is challenging for unrestricted open vocabulary and diversescenes. In this paper, we exploit the capability of global context informationby different-region-based context aggregation through our pyramid poolingmodule together with the proposed pyramid scene parsing network (PSPNet). Ourglobal prior representation is effective to produce good quality results on thescene parsing task, while PSPNet provides a superior framework for pixel-levelprediction tasks. The proposed approach achieves state-of-the-art performanceon various datasets. It came first in ImageNet scene parsing challenge 2016,PASCAL VOC 2012 benchmark and Cityscapes benchmark. A single PSPNet yields newrecord of mIoU accuracy 85.4% on PASCAL VOC 2012 and accuracy 80.2% onCityscapes.

Submission history

From: Hengshuang Zhao [view email]
[v1] Sun, 4 Dec 2016 11:46:22 UTC (3,858 KB)
[v2]Thu, 27 Apr 2017 12:15:17 UTC (3,865 KB)
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